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