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器件型号：TMS570LS0432 您好！
为什么为 CANBUS 生成的卤素码硬编码要发送8个字节？ 是否可以通过某种方法发送多达8个字节、即每个 CAN 消息2个数据字节？ 我在这里包含了我一直在看的函数:
uint32 canTransmit(canBASE_t *node, uint32 messageBox, const uint8 * data)
{
uint32 i;
uint32 success = 0U;
uint32 regIndex = (messageBox - 1U) >> 5U;
uint32 bitIndex = 1U << ((messageBox - 1U) & 0x1FU);
/* USER CODE BEGIN (7) */
/* USER CODE END */
/** - Check for pending message:
* - pending message, return 0
* - no pending message, start new transmission
*/
if ((node->TXRQx[regIndex] & bitIndex) != 0U)
{
success = 0U;
}
else
{
/** - Wait until IF1 is ready for use */
/*SAFETYMCUSW 28 D MR:NA <APPROVED> "Potentially infinite loop found - Hardware Status check for execution sequence" */
while ((node->IF1STAT & 0x80U) ==0x80U)
{
} /* Wait */
/** - Configure IF1 for
* - Message direction - Write
* - Data Update
* - Start Transmission
*/
node->IF1CMD = 0x87U;
/** - Copy TX data into IF1 */
for (i = 0U; i < 8U; i++)
{
#if ((__little_endian__ == 1) || (__LITTLE_ENDIAN__ == 1))
/*SAFETYMCUSW 45 D MR:21.1 <APPROVED> "Valid non NULL input parameters are only allowed in this driver" */
node->IF1DATx[i] = *data;
/*SAFETYMCUSW 45 D MR:21.1 <APPROVED> "Valid non NULL input parameters are only allowed in this driver" */
/*SAFETYMCUSW 567 S MR:17.1,17.4 <APPROVED> "Pointer increment needed" */
data++;
#else
/*SAFETYMCUSW 45 D MR:21.1 <APPROVED> "Valid non NULL input parameters are only allowed in this driver" */
node->IF1DATx[s_canByteOrder[i]] = *data;
/*SAFETYMCUSW 45 D MR:21.1 <APPROVED> "Valid non NULL input parameters are only allowed in this driver" */
/*SAFETYMCUSW 567 S MR:17.1,17.4 <APPROVED> "Pointer increment needed" */
data++;
#endif
}
/** - Copy TX data into message box */
/*SAFETYMCUSW 93 S MR: 6.1,6.2,10.1,10.2,10.3,10.4 <APPROVED> "LDRA Tool issue" */
node->IF1NO = (uint8) messageBox;
success = 1U;
}
/** @note The function canInit has to be called before this function can be used.\n
* The user is responsible to initialize the message box.
*/
/* USER CODE BEGIN (8) */
/* USER CODE END */
return success;
}
此致、
阿利斯特
