[20] | 1 | /* |
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| 2 | * modbus.c |
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| 3 | * |
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| 4 | * Created: 03.09.2012 08:39:20 |
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| 5 | * Author: Falko |
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| 6 | */ |
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| 7 | |
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| 8 | |
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| 9 | |
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| 10 | #if MODBUS_SUPPORT == TRUE |
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| 11 | |
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| 12 | #include "modbus.h" |
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| 13 | //#include "stm32g4xx_hal.h" |
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| 14 | #include "main.h" |
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| 15 | //#include "stm32g0xx_hal_tim.h" |
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| 16 | //#include "stm32_hal_legacy.h" |
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| 17 | #include <stdio.h> |
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| 18 | // --------------------------------------------------------- |
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| 19 | // -------------------- MODUL DEFINES ---------------------- |
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| 20 | // --------------------------------------------------------- |
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| 21 | |
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| 22 | |
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| 23 | |
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| 24 | |
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| 25 | #define MODBUS_BROADCAST_ADDRESS 0x00 |
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| 26 | #define FC_READ_COILS 0x01 |
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| 27 | #define FC_READ_HOLDING_REGISTERS 0x03 |
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| 28 | #define FC_WRITE_SINGLE_REGISTER 0x06 |
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| 29 | #define FC_WRITE_MULTIPLE_REGISTER 0x10 |
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| 30 | |
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| 31 | /* Protocol exceptions */ |
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| 32 | #define ILLEGAL_FUNCTION 0x01 |
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| 33 | #define ILLEGAL_DATA_ADDRESS 0x02 |
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| 34 | #define ILLEGAL_DATA_VALUE 0x03 |
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| 35 | #define SLAVE_DEVICE_FAILURE 0x04 |
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| 36 | #define SERVER_FAILURE 0x04 |
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| 37 | #define ACKNOWLEDGE 0x05 |
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| 38 | #define SLAVE_DEVICE_BUSY 0x06 |
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| 39 | #define SERVER_BUSY 0x06 |
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| 40 | #define NEGATIVE_ACKNOWLEDGE 0x07 |
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| 41 | #define MEMORY_PARITY_ERROR 0x08 |
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| 42 | #define GATEWAY_PROBLEM_PATH 0x0A |
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| 43 | #define GATEWAY_PROBLEM_TARGET 0x0B |
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| 44 | |
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| 45 | /* Local Error codes */ |
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| 46 | #define INVALID_CRC -1 |
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| 47 | |
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| 48 | // Position der Daten im Rx String |
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| 49 | #define OFFSET_SLAVE_ADRESS 0x00 |
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| 50 | #define OFFSET_FUNCTION_CODE 0x01 |
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| 51 | #define OFFSET_START_ADRESS_HI 0x02 |
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| 52 | #define OFFSET_START_ADRESS_LO 0x03 |
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| 53 | #define OFFSET_NO_OF_REGISTERS_HI 0x04 |
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| 54 | #define OFFSET_NO_OF_REGISTERS_LO 0x05 |
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| 55 | |
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| 56 | #define MIN_NUMBER_OF_REGISTERS_FC3 0x01 |
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| 57 | #define MAX_NUMBER_OF_REGISTERS_FC3 0x7D |
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| 58 | #define MIN_NUMBER_OF_REGISTERS_FC16 0x01 |
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| 59 | #define MAX_NUMBER_OF_REGISTERS_FC16 0x7B |
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| 60 | |
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| 61 | #ifdef DEBUG |
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| 62 | #define RESPONSE_TIMEOUT 300 // * 1ms |
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| 63 | #else |
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| 64 | #define RESPONSE_TIMEOUT 1000 // * 1ms |
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| 65 | #endif |
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| 66 | |
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| 67 | #define FAST_BAUDRATE_INTERFRAME_DELAY_us (1750UL) |
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| 68 | // --- Externe Variablen -------------------------------------------- |
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[22] | 69 | extern volatile modbus_t modbusData; |
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| 70 | extern volatile sys_data_t sys_data; |
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[20] | 71 | |
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| 72 | |
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| 73 | // --- Private Funktions Prototypen -------------------------------------------- |
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| 74 | |
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| 75 | void mbUartInit (modbus_t * mb_data,UART_HandleTypeDef * usart, uint32_t baudrate, uint32_t parityMode, uint32_t stopBits , uint32_t nrOfBitsPerChar); |
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| 76 | uint16_t mbCrc16 (uint8_t *buf, uint32_t len); |
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| 77 | void mbSend (modbus_t * mb_data ); |
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| 78 | uint32_t mbSlaveReadHoldingRegisters (uint8_t * response_string, uint8_t *msg, uint32_t tx_position, uint8_t deviceID); |
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| 79 | uint32_t mbSlaveWriteMultipleRegisters (uint8_t * response_string, uint8_t *msg, uint32_t tx_position, uint32_t deviceID); |
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| 80 | uint32_t mbSlaveWriteSingleRegister (uint8_t * response_string,uint8_t *msg,uint32_t tx_position, uint32_t deviceID); |
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| 81 | uint32_t mbSlaveResponseException (uint8_t* response_string, uint32_t function_code, uint32_t exception_code,uint32_t tx_position) ; |
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| 82 | static HAL_StatusTypeDef RS485_ModbusEx_Init (UART_HandleTypeDef *huart, uint32_t Polarity, uint32_t AssertionTime, uint32_t DeassertionTime, uint32_t charReceiveTimeout); |
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| 83 | static void UART_TxISR_8BIT (UART_HandleTypeDef *huart); |
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| 84 | |
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| 85 | // --- GEMEINSAME MODBUS FUNKTIONEN -------------------------------------------- |
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| 86 | // Diese Funktionen werden sowohl von Modbus Master als auch Modbus Slave verwendet |
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| 87 | |
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| 88 | /* |
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| 89 | * |
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| 90 | * @brief Diese Funktion Initialisert die Modbus Datenstrukturen und die Hardware |
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| 91 | * |
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| 92 | * Das Modbus Modul bentigt einen UART und einen Timer pro Modbus Anschluss |
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| 93 | * Die Funktion erfordert eine vorhandene Callback funktion namens HAL_UART_MspInit |
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| 94 | * In dieser muss: |
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| 95 | * - Der UART CLK eingeschaltet werden |
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| 96 | * - Die Pins initialisert werden (Alternate Port Funktion) |
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| 97 | * - Der NVIC Interrupt eingeschaltet werden |
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| 98 | * @param mb_data : Datenstruktur zur Aufnahme aller Daten |
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| 99 | * @param baudrate : Bautrate |
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| 100 | * @param parityMode : Parity, mglich ist UART_PARITY_ODD, UART_PARITY_EVEN, UART_PARITY_NONE. Default ist lt. Modbus Standart EVEN |
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| 101 | * @param usart : Timer Modul, z.B. USART1 |
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| 102 | * @retval None |
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| 103 | */ |
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| 104 | void mbInit(modbus_t* mb_data, uint32_t baudrate, uint32_t parityMode, uint16_t stopBits, UART_HandleTypeDef* usart) |
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| 105 | { |
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| 106 | uint32_t numberOfBitsPerChar; |
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| 107 | //uint32_t stopBits; |
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| 108 | |
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| 109 | if (stopBits < 1U || stopBits > 2U) stopBits = 1U; |
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| 110 | |
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| 111 | // Berechne Stop Bits |
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| 112 | /*if ((parityMode== MODBUS_UART_PARITY_EVEN) || (parityMode == MODBUS_UART_PARITY_ODD)) |
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| 113 | { |
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| 114 | stopBits = 1; |
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| 115 | } |
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| 116 | else |
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| 117 | { |
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| 118 | stopBits = 2; |
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| 119 | }*/ |
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| 120 | |
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| 121 | // Berechne Anzahl der Bits per Char |
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| 122 | numberOfBitsPerChar = NUMBER_OF_STARTBITS + NUMBER_OF_DATABITS + stopBits; |
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| 123 | if ((parityMode == MODBUS_UART_PARITY_EVEN) || (parityMode == MODBUS_UART_PARITY_ODD)) |
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| 124 | { |
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| 125 | numberOfBitsPerChar +=1; |
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| 126 | } |
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| 127 | |
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| 128 | mbUartInit(mb_data,usart, baudrate, parityMode, stopBits, numberOfBitsPerChar); |
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| 129 | |
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| 130 | // Datenstrukturen zurcksetzen |
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| 131 | mb_data->last_query_function_code = 0; |
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| 132 | mb_data->last_query_tcp_id.w = 0; |
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| 133 | mb_data->last_query_number_of_register.w = 0; |
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| 134 | mb_data->current_query = MB_QUERY_NOTHING; |
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| 135 | mb_data->last_query_slave_adress = 0; |
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| 136 | mb_data->last_query_start_adress.w = 0; |
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| 137 | mb_data->last_query_timeout = false; |
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| 138 | } |
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| 139 | |
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| 140 | /* |
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| 141 | * |
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| 142 | * @brief Diese Funktion Initialisert die Modbus UART Hardware |
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| 143 | * |
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| 144 | * @param mb_data : Datenstruktur zur Aufnahme aller Daten |
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| 145 | * @param usart : UART Modul, z.B. USART1 |
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| 146 | * @param baudrate : UART BAUD |
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| 147 | * @param parityMmode : Parity, mglich ist: |
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| 148 | UART_PARITY_ODD, UART_PARITY_EVEN, UART_PARITY_NONE. |
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| 149 | Default ist lt. Modbus Standart EVEN |
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| 150 | * @param stopBits : Anzahl der Stop Bits, lt Modbus Standart |
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| 151 | * 2 Stop Bits bei Parity None, ansonsten 2 Stop Bits |
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| 152 | * @retval None |
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| 153 | */ |
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| 154 | void mbUartInit(modbus_t * mb_data,UART_HandleTypeDef * usart, uint32_t baudrate, uint32_t parityMode, uint32_t stopBits , uint32_t nrOfBitsPerChar) |
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| 155 | { |
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| 156 | //--- Uart Init ------------------------------------------------------------ |
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| 157 | mb_data->uart = usart; |
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| 158 | |
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| 159 | // Init aus Cube |
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[22] | 160 | mb_data->uart->Instance = USART2; |
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| 161 | mb_data->uart->Init.BaudRate = baudrate; |
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[20] | 162 | mb_data->uart->Init.WordLength = UART_WORDLENGTH_9B; |
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| 163 | mb_data->uart->Init.StopBits = UART_STOPBITS_1; |
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| 164 | mb_data->uart->Init.Parity = UART_PARITY_EVEN; |
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| 165 | mb_data->uart->Init.Mode = UART_MODE_TX_RX; |
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| 166 | mb_data->uart->Init.HwFlowCtl = UART_HWCONTROL_NONE; |
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| 167 | mb_data->uart->Init.OverSampling = UART_OVERSAMPLING_16; |
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| 168 | mb_data->uart->Init.OneBitSampling = UART_ONE_BIT_SAMPLE_DISABLE; |
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| 169 | mb_data->uart->Init.ClockPrescaler = UART_PRESCALER_DIV1; |
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[22] | 170 | mb_data->uart->AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_SWAP_INIT; |
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| 171 | mb_data->uart->AdvancedInit.Swap = UART_ADVFEATURE_SWAP_ENABLE; |
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[20] | 172 | |
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[22] | 173 | // Init änderungen |
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[20] | 174 | |
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| 175 | // Baudrate |
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| 176 | mb_data->uart->Init.BaudRate = baudrate; |
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| 177 | // Parity Mode // Word length |
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| 178 | if(parityMode == MODBUS_UART_PARITY_EVEN) |
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| 179 | { |
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| 180 | mb_data->uart->Init.Parity = UART_PARITY_EVEN; |
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| 181 | mb_data->uart->Init.WordLength = UART_WORDLENGTH_9B; |
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| 182 | } |
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| 183 | else if(parityMode == MODBUS_UART_PARITY_ODD) |
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| 184 | { |
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| 185 | mb_data->uart->Init.Parity = UART_PARITY_ODD; |
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| 186 | mb_data->uart->Init.WordLength = UART_WORDLENGTH_9B; |
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| 187 | } |
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| 188 | else |
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| 189 | { |
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| 190 | mb_data->uart->Init.Parity = UART_PARITY_NONE; |
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| 191 | mb_data->uart->Init.WordLength = UART_WORDLENGTH_8B; |
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| 192 | } |
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| 193 | // Stopbits |
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| 194 | if (stopBits == 1) |
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| 195 | { |
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| 196 | mb_data->uart->Init.StopBits = UART_STOPBITS_1; |
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| 197 | } |
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| 198 | else |
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| 199 | { |
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| 200 | mb_data->uart->Init.StopBits = UART_STOPBITS_2; |
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| 201 | } |
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| 202 | // Init |
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[22] | 203 | // if (RS485_ModbusEx_Init(mb_data->uart, UART_DE_POLARITY_HIGH, 0, 0,TIMEOUT_FRAME_COMPLETE*nrOfBitsPerChar) != HAL_OK) |
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| 204 | // { |
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| 205 | // Error_Handler(); |
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| 206 | // } |
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| 207 | // if (HAL_UARTEx_DisableFifoMode(mb_data->uart) != HAL_OK) |
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| 208 | // { |
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| 209 | // Error_Handler(); |
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| 210 | // } |
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| 211 | uint32_t fixedDelayInBitDurations = (FAST_BAUDRATE_INTERFRAME_DELAY_us * baudrate) / 1000000UL + 1UL; |
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| 212 | // HAL_UART_EnableReceiverTimeout( usart); |
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| 213 | // HAL_UART_ReceiverTimeout_Config(usart, fixedDelayInBitDurations); |
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[20] | 214 | |
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[22] | 215 | if(HAL_UARTEx_ReceiveToIdle_DMA(mb_data->uart, mb_data->rx_buffer, RXBUFFERSIZE) != HAL_OK) |
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[20] | 216 | { |
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| 217 | printf("uart error \n\r"); |
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| 218 | while(1) |
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| 219 | { |
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| 220 | } |
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| 221 | } |
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| 222 | } |
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| 223 | |
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| 224 | |
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| 225 | |
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[22] | 226 | void HAL_UART_ErrorCallback(UART_HandleTypeDef *huart) |
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[20] | 227 | { |
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[22] | 228 | if (huart->ErrorCode == HAL_UART_ERROR_RTO) |
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[20] | 229 | { |
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[22] | 230 | modbusData.mb_rx_frame_complete = 1; |
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| 231 | modbusData.setRxLed = true; |
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| 232 | modbusData.rx_head= 8; |
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| 233 | printf("MB RTO Event! \n\r"); |
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[20] | 234 | } |
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| 235 | |
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[22] | 236 | if(HAL_UARTEx_ReceiveToIdle_DMA(huart, huart->pRxBuffPtr, RXBUFFERSIZE) != HAL_OK) |
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| 237 | { |
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| 238 | printf("uart error \n\r"); |
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| 239 | // while(1) |
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| 240 | // { |
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| 241 | // } |
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| 242 | } |
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| 243 | |
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[20] | 244 | } |
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| 245 | |
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[22] | 246 | void HAL_UARTEx_RxEventCallback(UART_HandleTypeDef *huart, uint16_t Size) |
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[20] | 247 | { |
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[22] | 248 | printf("MB rxEvent!RX=%d \n\r",Size); |
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| 249 | modbusData.setRxLed = true; |
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[20] | 250 | |
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[22] | 251 | modbusData.mb_rx_frame_complete = 1; |
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| 252 | modbusData.rx_head= Size +1; |
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[20] | 253 | |
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[22] | 254 | if(HAL_UARTEx_ReceiveToIdle_DMA(huart, huart->pRxBuffPtr, RXBUFFERSIZE) != HAL_OK) |
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| 255 | { |
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| 256 | printf("uart error \n\r"); |
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| 257 | // while(1) |
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| 258 | // { |
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| 259 | // } |
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| 260 | } |
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| 261 | |
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[20] | 262 | |
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| 263 | } |
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| 264 | |
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| 265 | |
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| 266 | |
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| 267 | |
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| 268 | |
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| 269 | |
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| 270 | |
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| 271 | |
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| 272 | |
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| 273 | |
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| 274 | |
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| 275 | |
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| 276 | |
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| 277 | |
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| 278 | |
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| 279 | |
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| 280 | |
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| 281 | |
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| 282 | |
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| 283 | |
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| 284 | |
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| 285 | void mbSend(modbus_t * mb_data ) |
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| 286 | { |
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| 287 | mb_data->current_query = MB_QUERY_SEND_DATA; |
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| 288 | HAL_UART_Transmit_IT(mb_data->uart, mb_data->tx_buffer, mb_data->tx_head); |
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| 289 | } |
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| 290 | |
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| 291 | void mbClearTxBuffer(modbus_t * mb_data) |
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| 292 | { |
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| 293 | mb_data->tx_head = 0; |
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| 294 | } |
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| 295 | |
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| 296 | |
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| 297 | |
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| 298 | // Compute the MODBUS RTU CRC |
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| 299 | uint16_t mbCrc16 ( uint8_t *buf, uint32_t len) |
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| 300 | { |
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| 301 | uint16_t crc = 0xFFFF; |
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| 302 | |
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| 303 | for (uint32_t pos = 0; pos < len; pos++) |
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| 304 | { |
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| 305 | crc ^= (uint16_t)buf[pos]; // XOR byte into least sig. byte of crc |
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| 306 | |
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| 307 | for (int i = 8; i != 0; i--) |
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| 308 | { // Loop over each bit |
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| 309 | if ((crc & 0x0001) != 0) |
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| 310 | { // If the LSB is set |
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| 311 | crc >>= 1; // Shift right and XOR 0xA001 |
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| 312 | crc ^= 0xA001; |
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| 313 | } |
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| 314 | else // Else LSB is not set |
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| 315 | { |
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| 316 | crc >>= 1; // Just shift right |
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| 317 | } |
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| 318 | } |
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| 319 | } |
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| 320 | |
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| 321 | // Note, this number has low and high bytes swapped, so use it accordingly (or swap bytes) |
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| 322 | return crc; |
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| 323 | } |
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| 324 | |
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| 325 | /* If CRC is correct returns msg_length else returns INVALID_CRC */ |
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| 326 | int mbCheckCrc16( uint8_t *msg, const int msg_length) |
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| 327 | { |
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| 328 | int ret; |
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| 329 | uint16_t crc_calc; |
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| 330 | uint16_t crc_received; |
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| 331 | |
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| 332 | crc_calc = mbCrc16(msg, msg_length - 2); |
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| 333 | crc_received = (msg[msg_length - 1] << 8) | msg[msg_length - 2]; |
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| 334 | |
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| 335 | // Check CRC of msg |
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| 336 | if (crc_calc == crc_received) { |
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| 337 | ret = msg_length; |
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| 338 | } else { |
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| 339 | ret = INVALID_CRC; |
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| 340 | } |
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| 341 | return ret; |
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| 342 | } |
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| 343 | |
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| 344 | uint32_t mbAppendCrc16(uint8_t * buffer, uint32_t tx_position) |
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| 345 | { |
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| 346 | uint16_t crc = mbCrc16( buffer , tx_position); |
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| 347 | |
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| 348 | uint8_t l_crc = (uint8_t) (crc & 0x00FF) ; |
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| 349 | uint8_t h_crc = (uint8_t) (crc >> 8); |
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| 350 | buffer[tx_position] = l_crc; |
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| 351 | tx_position++; |
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| 352 | buffer[tx_position] = h_crc; |
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| 353 | tx_position++; |
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| 354 | return tx_position; |
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| 355 | } |
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| 356 | |
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| 357 | /************************************************************************************************************ |
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| 358 | Function: mb_get_frame_complete |
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| 359 | Purpose: Rckabe ob Frame komplett empfangen wurde |
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| 360 | *************************************************************************************************************/ |
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| 361 | bool mbGetFrameComplete(modbus_t * mb_data) |
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| 362 | { |
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| 363 | return mb_data->mb_rx_frame_complete; |
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| 364 | } |
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| 365 | |
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| 366 | void mbClearRxFrame(modbus_t * mb_data) |
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| 367 | { |
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| 368 | // Wieder bei 0 im buffer anfangen |
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| 369 | mb_data->rx_head = 0; |
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| 370 | |
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| 371 | // keine Daten mehr vorhanden |
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| 372 | mb_data->mb_rx_frame_complete=false; |
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| 373 | } |
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| 374 | |
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| 375 | |
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| 376 | // --------------------- SLAVE FUNCTIONS --------------------------------------- |
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| 377 | |
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| 378 | #define SEND_TO_SLAVES_BUFFER_COUNT 1000 |
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| 379 | //static TASK_MODBUS_MASTER_Message_t xMessage[255]; |
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| 380 | //static TASK_MODBUS_MASTER_Message_t *pxMessage; |
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| 381 | static bword_t values[SEND_TO_SLAVES_BUFFER_COUNT]; |
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| 382 | static uint32_t y; |
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| 383 | static uint32_t z; |
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| 384 | |
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| 385 | uint32_t mbSlaveCheckModbusRtuQuery(modbus_t * mb_data) |
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| 386 | { |
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| 387 | uint32_t message_lengh; |
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| 388 | uint8_t *modbus_rx_message; |
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| 389 | modbus_rx_message = mb_data->rx_buffer; |
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| 390 | message_lengh= mb_data->rx_head; |
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| 391 | uint32_t slave_adress; |
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| 392 | slave_adress = modbus_rx_message[0]; |
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| 393 | |
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| 394 | if (message_lengh < 5) //Mindestens 5 Zeichen (Slave Adress + Function Code + 2x CRC |
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| 395 | { |
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| 396 | mbClearRxFrame(mb_data); |
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| 397 | return 0; |
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| 398 | } |
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| 399 | |
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| 400 | // Prfe CRC |
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| 401 | if (mbCheckCrc16(modbus_rx_message,message_lengh) == INVALID_CRC) |
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| 402 | { |
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| 403 | mbClearRxFrame(mb_data); |
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| 404 | return 0; |
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| 405 | } |
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| 406 | |
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| 407 | if (slave_adress == MODBUS_BROADCAST_ADDRESS) |
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| 408 | { |
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| 409 | |
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| 410 | return RESPOND_TO_QUERY; |
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| 411 | } |
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| 412 | /* auf richtige Slave Adresse checken ansonsten nicht antworten*/ |
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| 413 | else if (slave_adress == sys_data.s.parameter.slave_address) |
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| 414 | { |
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| 415 | return RESPOND_TO_QUERY; |
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| 416 | } |
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| 417 | |
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| 418 | mbClearRxFrame(mb_data); |
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| 419 | return 0; |
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| 420 | } |
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| 421 | |
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| 422 | void mbSlaveProcessRtuQuery(modbus_t * mb_data) |
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| 423 | { |
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| 424 | uint32_t tx_position=0; //die _Nchste_ Position in der Zeichen eingefgt werden mssen |
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| 425 | uint8_t *modbus_rx_message; |
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| 426 | modbus_rx_message = &mb_data->rx_buffer[0]; |
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| 427 | |
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| 428 | //Vorbereiten auf neues senden |
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| 429 | mbClearTxBuffer(mb_data); |
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| 430 | |
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| 431 | //mb_data->tx_buffer[0] = sys_data.s.vmGreenview.s.lb_slave_adress; |
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| 432 | mb_data->tx_buffer[0] = *modbus_rx_message; |
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| 433 | tx_position++; |
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| 434 | tx_position = mbSlaveProcessPdu(mb_data->tx_buffer , modbus_rx_message,tx_position, *modbus_rx_message); |
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| 435 | |
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| 436 | tx_position = mbAppendCrc16(mb_data->tx_buffer ,tx_position); |
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| 437 | mb_data->tx_head=tx_position; |
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| 438 | mbSend(mb_data); |
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| 439 | mbClearRxFrame(mb_data); |
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| 440 | } |
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| 441 | |
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| 442 | uint32_t mbSlaveProcessPdu (uint8_t* response_string, uint8_t * msg, uint32_t tx_position, uint8_t deviceID) |
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| 443 | { |
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| 444 | uint32_t function_code; |
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| 445 | uint32_t ret; |
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| 446 | |
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| 447 | function_code = msg[OFFSET_FUNCTION_CODE]; |
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| 448 | |
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| 449 | switch (function_code) |
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| 450 | { |
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| 451 | case FC_READ_HOLDING_REGISTERS: |
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| 452 | ret= mbSlaveReadHoldingRegisters(response_string, msg,tx_position, deviceID); |
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| 453 | break; |
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| 454 | |
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| 455 | case FC_WRITE_SINGLE_REGISTER: |
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| 456 | ret = mbSlaveWriteSingleRegister(response_string, msg,tx_position, deviceID); |
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| 457 | break; |
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| 458 | |
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| 459 | case FC_WRITE_MULTIPLE_REGISTER: |
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| 460 | ret=mbSlaveWriteMultipleRegisters(response_string, msg,tx_position, deviceID); |
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| 461 | break; |
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| 462 | |
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| 463 | default: |
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| 464 | ret=mbSlaveResponseException(response_string,function_code,ILLEGAL_FUNCTION,tx_position); |
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| 465 | break; |
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| 466 | } |
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| 467 | |
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| 468 | return ret; |
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| 469 | } |
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| 470 | |
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| 471 | |
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| 472 | uint32_t mbSlaveReadHoldingRegisters( uint8_t * response_string, uint8_t *msg, uint32_t tx_position, uint8_t deviceID) |
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| 473 | { |
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| 474 | uint32_t start_adress; |
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| 475 | uint32_t adress; |
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| 476 | uint32_t number_of_registers; |
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| 477 | |
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| 478 | /*stimmt die device ID mit der eigenen berein*/ |
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| 479 | if((deviceID != sys_data.s.parameter.slave_address) && (deviceID != 0)) |
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| 480 | { |
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| 481 | return mbSlaveResponseException(response_string,FC_WRITE_SINGLE_REGISTER,GATEWAY_PROBLEM_TARGET,tx_position); |
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| 482 | } |
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| 483 | |
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| 484 | start_adress = (msg[OFFSET_START_ADRESS_HI] << 8) + msg[OFFSET_START_ADRESS_LO]; |
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| 485 | number_of_registers = ( msg[OFFSET_NO_OF_REGISTERS_HI] << 8) + msg[OFFSET_NO_OF_REGISTERS_LO]; |
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| 486 | |
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| 487 | if ((number_of_registers < MIN_NUMBER_OF_REGISTERS_FC3) || (number_of_registers > MAX_NUMBER_OF_REGISTERS_FC3) ) |
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| 488 | { |
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| 489 | return mbSlaveResponseException(response_string,FC_READ_HOLDING_REGISTERS,ILLEGAL_DATA_VALUE,tx_position); |
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| 490 | } |
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| 491 | |
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| 492 | if (start_adress+number_of_registers-1 > MAX_ADRESS) |
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| 493 | { |
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| 494 | return mbSlaveResponseException(response_string, FC_READ_HOLDING_REGISTERS,ILLEGAL_DATA_ADDRESS,tx_position); |
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| 495 | } |
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| 496 | |
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| 497 | response_string[tx_position] = FC_READ_HOLDING_REGISTERS; // FUNCTION CODE |
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| 498 | tx_position++; |
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| 499 | response_string[tx_position] = number_of_registers * 2; // Bytes |
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| 500 | tx_position++; |
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| 501 | |
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| 502 | for(adress=start_adress;adress < (start_adress + number_of_registers);adress++) |
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| 503 | { |
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| 504 | /*Daten aus dem Speicher senden*/ |
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| 505 | response_string[tx_position] = sys_data.mb[adress].b[1]; |
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| 506 | tx_position++; |
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| 507 | response_string[tx_position] = sys_data.mb[adress].b[0]; |
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| 508 | tx_position++; |
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| 509 | } |
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| 510 | |
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| 511 | return tx_position; |
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| 512 | } |
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| 513 | |
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| 514 | |
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| 515 | uint32_t mbSlaveWriteMultipleRegisters(uint8_t * response_string, uint8_t *msg, uint32_t tx_position, uint32_t deviceID) |
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| 516 | { |
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| 517 | |
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| 518 | uint32_t start_adress; |
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| 519 | uint32_t number_of_registers; |
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| 520 | uint32_t adress; |
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| 521 | uint32_t offset; |
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| 522 | |
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| 523 | /*stimmt die device ID mit der eigenen berein*/ |
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| 524 | if((deviceID != sys_data.s.parameter.slave_address) && (deviceID != 0)) |
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| 525 | { |
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| 526 | return mbSlaveResponseException(response_string,FC_WRITE_SINGLE_REGISTER,GATEWAY_PROBLEM_TARGET,tx_position); |
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| 527 | } |
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| 528 | |
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| 529 | start_adress = (msg[OFFSET_START_ADRESS_HI] << 8) + msg[OFFSET_START_ADRESS_LO]; |
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| 530 | number_of_registers = ( msg[OFFSET_NO_OF_REGISTERS_HI] << 8) + msg[OFFSET_NO_OF_REGISTERS_LO]; |
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| 531 | offset=7; |
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| 532 | |
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| 533 | if ((number_of_registers < MIN_NUMBER_OF_REGISTERS_FC16) || (number_of_registers > MAX_NUMBER_OF_REGISTERS_FC16) ) |
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| 534 | { |
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| 535 | return mbSlaveResponseException(response_string, FC_WRITE_MULTIPLE_REGISTER,ILLEGAL_DATA_VALUE,tx_position); |
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| 536 | } |
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| 537 | |
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| 538 | if (start_adress+number_of_registers-1 > MAX_ADRESS) |
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| 539 | { |
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| 540 | return mbSlaveResponseException(response_string, FC_WRITE_MULTIPLE_REGISTER,ILLEGAL_DATA_ADDRESS,tx_position); |
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| 541 | } |
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| 542 | |
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| 543 | /*Daten in Gertespeicher schreiben*/ |
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| 544 | for(adress=start_adress;adress < (start_adress + number_of_registers);adress++) |
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| 545 | { |
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| 546 | sys_data.mb[adress].b[1] = msg[offset]; |
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| 547 | sys_data.mb[adress].b[0] = msg[offset+1]; |
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| 548 | offset+=2; |
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| 549 | } |
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| 550 | |
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| 551 | response_string[tx_position] = FC_WRITE_MULTIPLE_REGISTER; // FUNCTION CODE - 1 byte |
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| 552 | tx_position++; |
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| 553 | response_string[tx_position] = start_adress >> 8; |
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| 554 | tx_position++; |
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| 555 | response_string[tx_position] = (uint8_t ) ( start_adress & 0x00FF); // start adresse 2 byte |
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| 556 | tx_position++; |
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| 557 | response_string[tx_position] = number_of_registers >> 8; |
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| 558 | tx_position++; |
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| 559 | response_string[tx_position] = (uint8_t ) ( number_of_registers & 0x00FF); // Anzahl Register 2 byte |
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| 560 | tx_position++; |
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| 561 | return tx_position; |
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| 562 | } |
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| 563 | |
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| 564 | |
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| 565 | uint32_t mbSlaveWriteSingleRegister(uint8_t * response_string,uint8_t *msg,uint32_t tx_position, uint32_t deviceID) |
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| 566 | { |
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| 567 | |
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| 568 | uint32_t adress; |
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| 569 | |
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| 570 | /*stimmt die device ID mit der eigenen berein*/ |
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| 571 | if((deviceID != sys_data.s.parameter.slave_address) && (deviceID != 0)) |
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| 572 | { |
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| 573 | return mbSlaveResponseException(response_string,FC_WRITE_SINGLE_REGISTER,GATEWAY_PROBLEM_TARGET,tx_position); |
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| 574 | } |
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| 575 | |
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| 576 | adress = (msg[2] << 8) + msg[3]; |
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| 577 | |
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| 578 | if (adress > MAX_ADRESS) |
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| 579 | { |
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| 580 | return mbSlaveResponseException(response_string,FC_WRITE_SINGLE_REGISTER,ILLEGAL_DATA_ADDRESS,tx_position); |
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| 581 | } |
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| 582 | |
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| 583 | /*schreibe Daten in eigenen Speicher*/ |
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| 584 | sys_data.mb[adress].b[1] = msg[4]; |
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| 585 | sys_data.mb[adress].b[0] = msg[5]; |
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| 586 | |
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| 587 | response_string[tx_position]= FC_WRITE_SINGLE_REGISTER; // FUNCTION CODE |
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| 588 | tx_position++; |
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| 589 | response_string[tx_position]= adress >> 8; |
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| 590 | tx_position++; |
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| 591 | response_string[tx_position]= (uint8_t ) ( adress & 0x00FF); |
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| 592 | |
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| 593 | tx_position++; |
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| 594 | response_string[tx_position]= msg[4]; |
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| 595 | tx_position++; |
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| 596 | response_string[tx_position]= msg[5]; |
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| 597 | tx_position++; |
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| 598 | |
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| 599 | return tx_position; |
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| 600 | } |
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| 601 | |
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| 602 | |
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| 603 | uint32_t mbSlaveResponseException(uint8_t* response_string, uint32_t function_code, uint32_t exception_code,uint32_t tx_position ) |
---|
| 604 | { |
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| 605 | function_code += 0x80; |
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| 606 | response_string[tx_position] = function_code; // FUNCTION CODE |
---|
| 607 | tx_position++; |
---|
| 608 | response_string[tx_position] = exception_code; // |
---|
| 609 | tx_position++; |
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| 610 | return tx_position; |
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| 611 | } |
---|
| 612 | |
---|
| 613 | |
---|
| 614 | //---------------------------- UNKNOWN ----------------------------------------- |
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| 615 | //- - |
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| 616 | //------------------------------------------------------------------------------ |
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| 617 | |
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| 618 | #endif |
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| 619 | |
---|