主题中讨论的其他器件: MSP430FR5994、 MSP430WARE
请查看 MSP430 UART 接收。 接收中断触发太早、接收到的数据不正确。
- 您的完整硬件设置说明–您使用的是什么电路板、所有组件如何相互连接、您如何连接到 PC?
PC -> MSP-EXP430FR5994 EUSCIA1UART -> BQ79600-EVM ->定制 BQ79616
- 您如何监控系统以查看结果?
断点位于:
ReadReg (0、0x2001、autodr_Response_FRAME、1、0、 FRMWRT_SGL_R);
进入这条线会立即进入 UART ISR、而不是读取寄存器下面的函数。 仅接收到一个字节、不正确。 在该字节之后、UART ISR 不会触发。
- 对您为进入测试示例所采取的步骤/过程的描述、您对应该发生的情况的期望以及您实际看到的情况
BQ79600应返回7个字节来响应 ReadReg 0x2001命令。 返回的地址应为字节5上的0x14。
- 最后、到目前为止、您已采取哪些步骤来调试它?
除了在 CCS IDE 上观察变量/寄存器内容之外、我还在 BQ79600 EVM UART RX 和 TX 上使用了示波器探针。
/* * uartCommands.c * * Created on: Apr 21, 2022 * Author: Priya.Nadathur */ #include <driverlib.h> #include <string.h> #include "bspFuncs.h" #include "mbbConfig.h" #include "uartCommands.h" #include "timer.h" #include "B0_reg.h" #ifdef BQ_UART // CRC16 TABLE // ITU_T polynomial: x^16 + x^15 + x^2 + 1 const uint16_t crc16_table[256] = { 0x0000, 0xC0C1, 0xC181, 0x0140, 0xC301, 0x03C0, 0x0280, 0xC241, 0xC601, 0x06C0, 0x0780, 0xC741, 0x0500, 0xC5C1, 0xC481, 0x0440, 0xCC01, 0x0CC0, 0x0D80, 0xCD41, 0x0F00, 0xCFC1, 0xCE81, 0x0E40, 0x0A00, 0xCAC1, 0xCB81, 0x0B40, 0xC901, 0x09C0, 0x0880, 0xC841, 0xD801, 0x18C0, 0x1980, 0xD941, 0x1B00, 0xDBC1, 0xDA81, 0x1A40, 0x1E00, 0xDEC1, 0xDF81, 0x1F40, 0xDD01, 0x1DC0, 0x1C80, 0xDC41, 0x1400, 0xD4C1, 0xD581, 0x1540, 0xD701, 0x17C0, 0x1680, 0xD641, 0xD201, 0x12C0, 0x1380, 0xD341, 0x1100, 0xD1C1, 0xD081, 0x1040, 0xF001, 0x30C0, 0x3180, 0xF141, 0x3300, 0xF3C1, 0xF281, 0x3240, 0x3600, 0xF6C1, 0xF781, 0x3740, 0xF501, 0x35C0, 0x3480, 0xF441, 0x3C00, 0xFCC1, 0xFD81, 0x3D40, 0xFF01, 0x3FC0, 0x3E80, 0xFE41, 0xFA01, 0x3AC0, 0x3B80, 0xFB41, 0x3900, 0xF9C1, 0xF881, 0x3840, 0x2800, 0xE8C1, 0xE981, 0x2940, 0xEB01, 0x2BC0, 0x2A80, 0xEA41, 0xEE01, 0x2EC0, 0x2F80, 0xEF41, 0x2D00, 0xEDC1, 0xEC81, 0x2C40, 0xE401, 0x24C0, 0x2580, 0xE541, 0x2700, 0xE7C1, 0xE681, 0x2640, 0x2200, 0xE2C1, 0xE381, 0x2340, 0xE101, 0x21C0, 0x2080, 0xE041, 0xA001, 0x60C0, 0x6180, 0xA141, 0x6300, 0xA3C1, 0xA281, 0x6240, 0x6600, 0xA6C1, 0xA781, 0x6740, 0xA501, 0x65C0, 0x6480, 0xA441, 0x6C00, 0xACC1, 0xAD81, 0x6D40, 0xAF01, 0x6FC0, 0x6E80, 0xAE41, 0xAA01, 0x6AC0, 0x6B80, 0xAB41, 0x6900, 0xA9C1, 0xA881, 0x6840, 0x7800, 0xB8C1, 0xB981, 0x7940, 0xBB01, 0x7BC0, 0x7A80, 0xBA41, 0xBE01, 0x7EC0, 0x7F80, 0xBF41, 0x7D00, 0xBDC1, 0xBC81, 0x7C40, 0xB401, 0x74C0, 0x7580, 0xB541, 0x7700, 0xB7C1, 0xB681, 0x7640, 0x7200, 0xB2C1, 0xB381, 0x7340, 0xB101, 0x71C0, 0x7080, 0xB041, 0x5000, 0x90C1, 0x9181, 0x5140, 0x9301, 0x53C0, 0x5280, 0x9241, 0x9601, 0x56C0, 0x5780, 0x9741, 0x5500, 0x95C1, 0x9481, 0x5440, 0x9C01, 0x5CC0, 0x5D80, 0x9D41, 0x5F00, 0x9FC1, 0x9E81, 0x5E40, 0x5A00, 0x9AC1, 0x9B81, 0x5B40, 0x9901, 0x59C0, 0x5880, 0x9841, 0x8801, 0x48C0, 0x4980, 0x8941, 0x4B00, 0x8BC1, 0x8A81, 0x4A40, 0x4E00, 0x8EC1, 0x8F81, 0x4F40, 0x8D01, 0x4DC0, 0x4C80, 0x8C41, 0x4400, 0x84C1, 0x8581, 0x4540, 0x8701, 0x47C0, 0x4680, 0x8641, 0x8201, 0x42C0, 0x4380, 0x8341, 0x4100, 0x81C1, 0x8081, 0x4040 }; BYTE bBuf[8]; uint8_t pFrame[64]; int bRes = 0; BYTE bReturn = 0; BYTE* currCRC; int crc_i = 0; uint16_t wCRC2 = 0xFFFF; int crc16_i = 0; uint8_t uartRxLen; static uint8_t idx; volatile uint8_t rxComplete; BYTE RXData[(1+6)*TOTALBOARDS] = {0}; BYTE response_frame[(8)*TOTALBOARDS]; //store 128 bytes + 6 header bytes for each board // Configure BQ UART @1000000 baud // software-dl.ti.com/.../index.html void UART_Init(void){ GPIO_setAsPeripheralModuleFunctionInputPin( BQUART_TX_PORT, BQUART_TX_PIN + BQUART_RX_PIN, BQUART_SELECT_FUNCTION ); BQUART_initParam param = {0}; param.clockPrescalar = 4, param.firstModReg = 0, param.secondModReg = 0, param.selectClockSource = BQUART_CLOCKSOURCE; param.parity = BQUART_PARITY; param.msborLsbFirst = BQUART_BITORDER; param.numberofStopBits = BQUART_STOPBIT; param.uartMode = BQUART_MODE; param.overSampling = BQUART_OVERSAMPLING; if(STATUS_FAIL == BQUART_INIT(BQUART, ¶m)) { return; } BQUART_enable(BQUART); BQUART_clearInterrupt(BQUART, BQUART_RX_INT); BQUART_enableInterrupt(BQUART, BQUART_RX_INT); } //FORMAT WRITE DATA, SEND TO //BE COMBINED WITH REST OF FRAME int WriteReg(BYTE bID, uint16_t wAddr, uint64_t dwData, BYTE bLen, BYTE bWriteType){ // device address, register start address, data bytes, data length, write type (single, broadcast, stack) bRes = 0; memset(bBuf,0,sizeof(bBuf)); switch (bLen) { case 1: bBuf[0] = dwData & 0x00000000000000FF; bRes = WriteFrame(bID, wAddr, bBuf, 1, bWriteType); break; case 2: bBuf[0] = (dwData & 0x000000000000FF00) >> 8; bBuf[1] = dwData & 0x00000000000000FF; bRes = WriteFrame(bID, wAddr, bBuf, 2, bWriteType); break; case 3: bBuf[0] = (dwData & 0x0000000000FF0000) >> 16; bBuf[1] = (dwData & 0x000000000000FF00) >> 8; bBuf[2] = dwData & 0x00000000000000FF; bRes = WriteFrame(bID, wAddr, bBuf, 3, bWriteType); break; case 4: bBuf[0] = (dwData & 0x00000000FF000000) >> 24; bBuf[1] = (dwData & 0x0000000000FF0000) >> 16; bBuf[2] = (dwData & 0x000000000000FF00) >> 8; bBuf[3] = dwData & 0x00000000000000FF; bRes = WriteFrame(bID, wAddr, bBuf, 4, bWriteType); break; case 5: bBuf[0] = (dwData & 0x000000FF00000000) >> 32; bBuf[1] = (dwData & 0x00000000FF000000) >> 24; bBuf[2] = (dwData & 0x0000000000FF0000) >> 16; bBuf[3] = (dwData & 0x000000000000FF00) >> 8; bBuf[4] = dwData & 0x00000000000000FF; bRes = WriteFrame(bID, wAddr, bBuf, 5, bWriteType); break; case 6: bBuf[0] = (dwData & 0x0000FF0000000000) >> 40; bBuf[1] = (dwData & 0x000000FF00000000) >> 32; bBuf[2] = (dwData & 0x00000000FF000000) >> 24; bBuf[3] = (dwData & 0x0000000000FF0000) >> 16; bBuf[4] = (dwData & 0x000000000000FF00) >> 8; bBuf[5] = dwData & 0x00000000000000FF; bRes = WriteFrame(bID, wAddr, bBuf, 6, bWriteType); break; case 7: bBuf[0] = (dwData & 0x00FF000000000000) >> 48; bBuf[1] = (dwData & 0x0000FF0000000000) >> 40; bBuf[2] = (dwData & 0x000000FF00000000) >> 32; bBuf[3] = (dwData & 0x00000000FF000000) >> 24; bBuf[4] = (dwData & 0x0000000000FF0000) >> 16; bBuf[5] = (dwData & 0x000000000000FF00) >> 8; bBuf[6] = dwData & 0x00000000000000FF; bRes = WriteFrame(bID, wAddr, bBuf, 7, bWriteType); break; case 8: bBuf[0] = (dwData & 0xFF00000000000000) >> 56; bBuf[1] = (dwData & 0x00FF000000000000) >> 48; bBuf[2] = (dwData & 0x0000FF0000000000) >> 40; bBuf[3] = (dwData & 0x000000FF00000000) >> 32; bBuf[4] = (dwData & 0x00000000FF000000) >> 24; bBuf[5] = (dwData & 0x0000000000FF0000) >> 16; bBuf[6] = (dwData & 0x000000000000FF00) >> 8; bBuf[7] = dwData & 0x00000000000000FF; bRes = WriteFrame(bID, wAddr, bBuf, 8, bWriteType); break; default: break; } return bRes; } //GENERATE COMMAND FRAME int WriteFrame(BYTE bID, uint16_t wAddr, BYTE * pData, BYTE bLen, BYTE bWriteType) { int bPktLen = 0; uint8_t * pBuf = pFrame; uint16_t wCRC; memset(pFrame, 0x7F, sizeof(pFrame)); *pBuf++ = 0x80 | (bWriteType) | ((bWriteType & 0x10) ? bLen - 0x01 : 0x00); //Only include blen if it is a write; Writes are 0x90, 0xB0, 0xD0 if (bWriteType == FRMWRT_SGL_R || bWriteType == FRMWRT_SGL_W) { *pBuf++ = (bID & 0x00FF); } *pBuf++ = (wAddr & 0xFF00) >> 8; *pBuf++ = wAddr & 0x00FF; while (bLen--) *pBuf++ = *pData++; bPktLen = pBuf - pFrame; wCRC = CRC16(pFrame, bPktLen); *pBuf++ = wCRC & 0x00FF; *pBuf++ = (wCRC & 0xFF00) >> 8; bPktLen += 2; //THIS SEEMS to occasionally drop bytes from the frame. Sometimes is not sending the last frame of the CRC. //(Seems to be caused by stack overflow, so take precautions to reduce stack usage in function calls) uartSend(bPktLen, pFrame); return bPktLen; } //GENERATE READ COMMAND FRAME AND THEN WAIT FOR RESPONSE DATA (INTERRUPT MODE FOR SCIRX) int ReadReg(BYTE bID, uint16_t wAddr, BYTE * pData, BYTE bLen, uint32_t dwTimeOut, BYTE bWriteType) { // device address, register start address, byte frame pointer to store data, data length, read type (single, broadcast, stack) int crcChk; bRes = 0; if (bWriteType == FRMWRT_SGL_R) { ReadFrameReq(bID, wAddr, bLen, bWriteType, bLen+6); memset(pData, 0, sizeof(pData)); } else if (bWriteType == FRMWRT_STK_R) { bRes = ReadFrameReq(bID, wAddr, bLen, bWriteType, (bLen + 6) * (TOTALBOARDS - 1)); memset(pData, 0, sizeof(pData)); } else if (bWriteType == FRMWRT_ALL_R) { bRes = ReadFrameReq(bID, wAddr, bLen, bWriteType, (bLen + 6) * TOTALBOARDS); memset(pData, 0, sizeof(pData)); } else { bRes = 0; } // //CHECK IF CRC IS CORRECT for(crc_i=0; crc_i<bRes; crc_i+=(bLen+6)) { if(CRC16(&pData[crc_i], bLen+6)!=0) { // printConsole("\n\rBAD CRC=%04X,i=%d,bLen=%d\n\r",(pData[crc_i+bLen+4]<<8|pData[crc_i+bLen+5]),crc_i,bLen); // PrintFrame(pData, bLen); crcChk = 1; } else crcChk = 0; } /* crc_i = 0; currCRC = pData; for(crc_i=0; crc_i<bRes; crc_i+=(bLen+6)) { printConsole("%x",&currCRC); if(CRC16(currCRC, bLen+6)!=0) { printConsole("BAD CRC=%04X,byte=%d\n\r",(currCRC[bLen+4]<<8|currCRC[bLen+5]),crc_i); PrintFrame(pData, bLen); } *currCRC+=(bLen+6); } */ return crcChk; } int ReadFrameReq(BYTE bID, uint16_t wAddr, BYTE bByteToReturn, BYTE bWriteType, BYTE rxLen) { bReturn = bByteToReturn - 1; uartRxLen = rxLen; idx = 0; rxComplete = 0; if (bReturn > 127) return 0; return WriteFrame(bID, wAddr, &bReturn, 1, bWriteType); } uint16_t CRC16(BYTE *pBuf, int nLen) { wCRC2 = 0xFFFF; //printConsole("CRCOUT = \t"); for (crc16_i = 0; crc16_i < nLen; crc16_i++) { //printConsole("%02x ",*pBuf); wCRC2 ^= (*pBuf++) & 0x00FF; wCRC2 = crc16_table[wCRC2 & 0x00FF] ^ (wCRC2 >> 8); } //printConsole("\n\r"); return wCRC2; } void uartSend(int length, uint8_t * data){ uint8_t i; for (i = 0; i < length; i++){ while (!(UCA1IFG & UCTXIFG)); BQUART_TXBUF = data[i]; } } void uartReceive(BYTE * data, BYTE length){ } //****************************************************************************** // SPI_B1 Interrupt ************************************************************ //****************************************************************************** #pragma vector=BQUART_VECTOR /******************************************************************************* USCI_A1_ISR ****************************************************************** ******************************************************************************* * Function: A1 Interrupt Routine ********************************************************************************/ __interrupt void BQUART_ISR(void) { switch(__even_in_range(BQUART_IV, USCI_UART_UCTXCPTIFG)) { case USCI_NONE: break; case USCI_UART_UCRXIFG: BQUART_IFG &= ~UCRXIFG; RXData[idx] = EUSCI_A_UART_receiveData(BQUART); idx++; if (idx == uartRxLen){ rxComplete = 1; } break; case USCI_UART_UCTXIFG: break; case USCI_UART_UCSTTIFG: break; case USCI_UART_UCTXCPTIFG: break; default: break; } } #endif