204 lines
7.7 KiB
C
204 lines
7.7 KiB
C
#include "pt100.h"
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#pragma pack(1)
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typedef struct
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{
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uint8_t address; // 从机地址
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uint8_t code; // 功能码
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uint16_t reg_address; // 寄存器地址
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uint16_t reg_num; // 寄存器数量
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uint16_t crc;
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} pt100_data_t;
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#pragma pack()
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extern uart_t *uarts[UART_NUM_MAX];
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static pt100_t handle;
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float32 pt100_tempture[PT100_DATA_CHANNEL_NUM];
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/* CRC low byte table */
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static const unsigned char auchCRCLo[] =
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{
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0x00, 0xC0, 0xC1, 0x01, 0xC3, 0x03, 0x02, 0xC2, 0xC6, 0x06,
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0x07, 0xC7, 0x05, 0xC5, 0xC4, 0x04, 0xCC, 0x0C, 0x0D, 0xCD,
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0x0F, 0xCF, 0xCE, 0x0E, 0x0A, 0xCA, 0xCB, 0x0B, 0xC9, 0x09,
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0x08, 0xC8, 0xD8, 0x18, 0x19, 0xD9, 0x1B, 0xDB, 0xDA, 0x1A,
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0x1E, 0xDE, 0xDF, 0x1F, 0xDD, 0x1D, 0x1C, 0xDC, 0x14, 0xD4,
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0xD5, 0x15, 0xD7, 0x17, 0x16, 0xD6, 0xD2, 0x12, 0x13, 0xD3,
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0x11, 0xD1, 0xD0, 0x10, 0xF0, 0x30, 0x31, 0xF1, 0x33, 0xF3,
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0xF2, 0x32, 0x36, 0xF6, 0xF7, 0x37, 0xF5, 0x35, 0x34, 0xF4,
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0x3C, 0xFC, 0xFD, 0x3D, 0xFF, 0x3F, 0x3E, 0xFE, 0xFA, 0x3A,
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0x3B, 0xFB, 0x39, 0xF9, 0xF8, 0x38, 0x28, 0xE8, 0xE9, 0x29,
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0xEB, 0x2B, 0x2A, 0xEA, 0xEE, 0x2E, 0x2F, 0xEF, 0x2D, 0xED,
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0xEC, 0x2C, 0xE4, 0x24, 0x25, 0xE5, 0x27, 0xE7, 0xE6, 0x26,
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0x22, 0xE2, 0xE3, 0x23, 0xE1, 0x21, 0x20, 0xE0, 0xA0, 0x60,
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0x61, 0xA1, 0x63, 0xA3, 0xA2, 0x62, 0x66, 0xA6, 0xA7, 0x67,
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0xA5, 0x65, 0x64, 0xA4, 0x6C, 0xAC, 0xAD, 0x6D, 0xAF, 0x6F,
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0x6E, 0xAE, 0xAA, 0x6A, 0x6B, 0xAB, 0x69, 0xA9, 0xA8, 0x68,
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0x78, 0xB8, 0xB9, 0x79, 0xBB, 0x7B, 0x7A, 0xBA, 0xBE, 0x7E,
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0x7F, 0xBF, 0x7D, 0xBD, 0xBC, 0x7C, 0xB4, 0x74, 0x75, 0xB5,
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0x77, 0xB7, 0xB6, 0x76, 0x72, 0xB2, 0xB3, 0x73, 0xB1, 0x71,
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0x70, 0xB0, 0x50, 0x90, 0x91, 0x51, 0x93, 0x53, 0x52, 0x92,
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0x96, 0x56, 0x57, 0x97, 0x55, 0x95, 0x94, 0x54, 0x9C, 0x5C,
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0x5D, 0x9D, 0x5F, 0x9F, 0x9E, 0x5E, 0x5A, 0x9A, 0x9B, 0x5B,
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0x99, 0x59, 0x58, 0x98, 0x88, 0x48, 0x49, 0x89, 0x4B, 0x8B,
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0x8A, 0x4A, 0x4E, 0x8E, 0x8F, 0x4F, 0x8D, 0x4D, 0x4C, 0x8C,
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0x44, 0x84, 0x85, 0x45, 0x87, 0x47, 0x46, 0x86, 0x82, 0x42,
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0x43, 0x83, 0x41, 0x81, 0x80, 0x40};
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/* CRC high byte table */
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static const unsigned char auchCRCHi[] =
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{
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0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0,
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0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41,
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0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0,
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0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40,
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0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1,
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0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41,
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0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1,
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0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41,
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0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0,
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0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40,
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0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1,
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0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40,
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0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0,
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0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40,
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0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0,
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0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40,
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0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0,
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0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41,
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0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0,
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0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41,
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0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0,
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0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40,
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0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1,
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0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41,
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0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0,
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0x80, 0x41, 0x00, 0xC1, 0x81, 0x40};
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/* Public functions ----------------------------------------------------------*/
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/**
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* @brief Calculate Modbus CRC16
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* @param puchMsg: Data to calculate CRC
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* @param usMsgLen: Data length
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* @param puchCRCHi: High byte of CRC value
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* @param puchCRCLo: Low byte of CRC value
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* @note Send the low byte first
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* @retval None
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*/
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void GetModbusCRC16(unsigned char *puchMsg, unsigned short usMsgLen,
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unsigned char *puchCRCLo, unsigned char *puchCRCHi)
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{
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unsigned char uchCRCLo = 0xFF;
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unsigned char uchCRCHi = 0xFF;
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unsigned short uIndex = 0;
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while (usMsgLen--)
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{
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uIndex = (unsigned char)(uchCRCHi ^ *puchMsg++);
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uchCRCHi = (unsigned char)(uchCRCLo ^ auchCRCHi[uIndex]);
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uchCRCLo = (unsigned char)(auchCRCLo[uIndex]);
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}
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*puchCRCLo = uchCRCHi;
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*puchCRCHi = uchCRCLo;
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}
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static void pt100_rx_cb(uint8_t uart_index, uint8_t *data, uint16_t len)
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{
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uart_t *h = handle.huart;
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if (h != NULL)
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{
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if (h->uart_index == uart_index)
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{
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if ((h->rx_sta & 0x8000) == 0) // 接收未完成
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{
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handle.ctx_recv_buf[h->rx_sta & 0X3FFF] = h->rxbuf[0];
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h->rx_sta++;
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if (h->rx_sta > (PT100_MODBUS_RECV_LENGTH - 1))
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h->rx_sta = 0; // 接收数据错误,重新开始接收
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}
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}
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}
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}
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static void pt100_uart_init(void)
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{
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if (uarts[PT100_RS485_PORT] == NULL)
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{
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uarts[PT100_RS485_PORT] = uart_create(USART4, FALSE, 1, pt100_rx_cb, FALSE, 0, NULL);
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uarts[PT100_RS485_PORT]->uart_index = PT100_RS485_PORT;
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}
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}
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void pt100_init(send_data_cb_t cb)
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{
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handle.send_data_cb = cb;
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pt100_uart_init();
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handle.huart = uarts[PT100_RS485_PORT];
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DBG_ASSERT(handle.huart != NULL __DBG_LINE);
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GPIO_RESET(RS485_EN2_GPIO_Port, RS485_EN2_Pin);
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uart_recv_en(handle.huart);
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handle.idel_flag = false;
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osel_memset((uint8_t *)pt100_tempture, 0, sizeof(float32) * PT100_DATA_CHANNEL_NUM);
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}
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void pt100_process(void)
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{
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uart_t *h = handle.huart;
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DBG_ASSERT(h != NULL __DBG_LINE);
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pt100_data_t data;
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data.address = 0x01;
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data.code = 0x04;
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data.reg_address = 0x0000;
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data.reg_address = S2B_UINT16(data.reg_address);
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data.reg_num = PT100_DATA_CHANNEL_NUM;
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data.reg_num = S2B_UINT16(data.reg_num);
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GetModbusCRC16((uint8_t *)&data, sizeof(pt100_data_t) - 2, (uint8_t *)&data.crc, (uint8_t *)&data.crc + 1);
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h->rx_sta = 0;
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handle.send_data_cb((uart_num_e)h->uart_index, (uint8_t *)&data, sizeof(pt100_data_t));
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}
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void pt100_data_deal(void)
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{
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uart_t *h = handle.huart;
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uint8_t *p = handle.ctx_recv_buf;
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uint8_t offset = 0;
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uint16_t crc = 0, crc1 = 0;
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uint16_t length = h->rx_sta;
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uint16_t pt100_data[PT100_DATA_CHANNEL_NUM];
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uint8_t pt100_data_length = 0;
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if (h->rx_sta == 0)
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{
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return; // 未收到数据切换到下一个设备
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}
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h->rx_sta |= 0x8000; // 暂停串口接收数据，20ms预留了充足的接收时间
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if (p[offset] == 0x01 && p[++offset] == 0x04 && length > 4)
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{
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offset++;
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// CRC校验
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GetModbusCRC16(p, length - 2, (uint8_t *)&crc, (uint8_t *)&crc + 1);
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osel_memcpy((uint8_t *)&crc1, p + length - 2, 2);
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if (crc == crc1)
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{
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pt100_data_length = p[offset];
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offset++; // 偏移过长度
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osel_memcpy((uint8_t *)pt100_data, p + offset, pt100_data_length);
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for (uint8_t i = 0; i < PT100_DATA_CHANNEL_NUM; i++)
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{
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pt100_data[i] = B2S_UINT16(pt100_data[i]);
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if (pt100_data[i] != 0xffff)
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{
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pt100_tempture[i] = (float32)pt100_data[i] / 10;
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}
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else
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{
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pt100_tempture[i] = 129;
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}
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}
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}
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}
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}
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