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TMS570LC4357: How CAN communicates properly with external debugging tools

Part Number: TMS570LC4357
Other Parts Discussed in Thread: HALCOGEN

This is  my test code:

/** @file HL_sys_main.c 
*   @brief Application main file
*   @date 11-Dec-2018
*   @version 04.07.01
*
*   This file contains an empty main function,
*   which can be used for the application.
*/

/* 
* Copyright (C) 2009-2018 Texas Instruments Incorporated - www.ti.com  
* 
* 
*  Redistribution and use in source and binary forms, with or without 
*  modification, are permitted provided that the following conditions 
*  are met:
*
*    Redistributions of source code must retain the above copyright 
*    notice, this list of conditions and the following disclaimer.
*
*    Redistributions in binary form must reproduce the above copyright
*    notice, this list of conditions and the following disclaimer in the 
*    documentation and/or other materials provided with the   
*    distribution.
*
*    Neither the name of Texas Instruments Incorporated nor the names of
*    its contributors may be used to endorse or promote products derived
*    from this software without specific prior written permission.
*
*  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 
*  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 
*  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
*  A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 
*  OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 
*  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 
*  LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
*  DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
*  THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 
*  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 
*  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/


/* USER CODE BEGIN (0) */
#include "HL_can.h"
/* USER CODE END */

/* Include Files */

#include "HL_sys_common.h"

/* USER CODE BEGIN (1) */
#define D_COUNT  512
uint32 cnt=0, error =0, tx_done =0;	//cnt-计数 error--错误计数 tx_done--发送标志位
uint8 tx_data[8] = {0,1,2,3,4,5,6,7};	//发送缓冲区
uint8 rx_data[8] = {0};	//接收缓冲区
/*缓冲区重定向*/
uint8 *tx_ptr = NULL;
uint8 *rx_ptr = NULL;

uint8 *dptr=0;			//组包时使用

uint16 round_cnt = 0;	//初始化值

//void dumpSomeData(uint32 tmp);	//组包函数 测试用
/* USER CODE END */

/** @fn void main(void)
*   @brief Application main function
*   @note This function is empty by default.
*
*   This function is called after startup.
*   The user can use this function to implement the application.
*/

/* USER CODE BEGIN (2) */
void smallDelay(uint32 num) {
      volatile unsigned int delayval;
      delayval = num;
      while(delayval--);// 800000大约168ms	1ms 大约 4762
}
/* USER CODE END */

int main(void)
{
/* USER CODE BEGIN (3) */
  uint8 *tx_ptr = &(tx_data[0]);
  uint8 *rx_ptr = &(rx_data[0]);
  canInit();
//  dumpSomeData(cnt);
  smallDelay(4762);
  canTransmit(canREG1, canMESSAGE_BOX2, tx_ptr);	//发送到外部调试助手

  while(1)
	{
	  while(!canIsRxMessageArrived(canREG1, canMESSAGE_BOX2));
	  canGetData(canREG1, canMESSAGE_BOX2, rx_ptr);
	  smallDelay(4762);
	  //将接收到的数据发送出去
	  canTransmit(canREG1, canMESSAGE_BOX2, rx_ptr);//发送到外部调试助手
	}
/* USER CODE END */

    return 0;
}


/* USER CODE BEGIN (4) */

/* USER CODE END */

  • Hello ,

        HALCoGen contains several step-by-step example projects including CAN example.

        They can be located in HALCoGen by going to Help -> Examples, or Help -> Help Topics -> Contents -> Examples.

        There is FAQ for development resource , including CAN example code also.

        [FAQ] TMS570LC4357: Examples and Demos available for Hercules Controllers (E.g. TMS570x, RM57x and RM46x etc) - Arm-based microcontrollers forum - Arm-based microcontrollers - TI E2E support forums

         If you have further concern , please review the user guide linked below.

        2.1. Description — Hercules Safety MCUs Documentation

  • Hello Alice.

          Thank you for your reply.I want to know what configuration I need if I want to communicate with USB_CAN Tool in order to communicate successfully.

           I have tried the baud rate 500K.As in my code above, the USB_CAN tool cannot receive the message sent, and the development board cannot receive the message sent by the USB_CAN tool.The CAN bus mode I configured is normal.There is a CAN transceiver on the development board, the model is SN65HVDA541.

         This is my configuration code:

     

    void canInit(void)
    {
    /* USER CODE BEGIN (4) */
    /* USER CODE END */
    
        /** @b Initialize @b CAN2: */
    
        /** - Setup control register
        *     - Disable automatic wakeup on bus activity
        *     - Local power down mode disabled
        *     - Disable DMA request lines
        *     - Enable global Interrupt Line 0 and 1
        *     - Disable debug mode
        *     - Release from software reset
        *     - Enable/Disable parity or ECC
        *     - Enable/Disable auto bus on timer
        *     - Setup message completion before entering debug state
        *     - Setup normal operation mode
        *     - Request write access to the configuration registers
        *     - Setup automatic retransmission of messages
        *     - Disable error interrupts
        *     - Disable status interrupts
        *     - Enter initialization mode
        */
        canREG2->CTL = (uint32)0x00000200U 
                     | (uint32)0x00000000U 
                     | (uint32)((uint32)0x00000005U << 10U)
                     | 0x00020043U;
    
        /** - Clear all pending error flags and reset current status */
        canREG2->ES |= 0xFFFFFFFFU;
    
        /** - Assign interrupt level for messages */
        canREG2->INTMUXx[0U] = (uint32)0x00000000U
                             | (uint32)0x00000000U
                             | (uint32)0x00000000U
                             | (uint32)0x00000000U
                             | (uint32)0x00000000U
                             | (uint32)0x00000000U
                             | (uint32)0x00000000U
                             | (uint32)0x00000000U
                             | (uint32)0x00000000U
                             | (uint32)0x00000000U
                             | (uint32)0x00000000U
                             | (uint32)0x00000000U
                             | (uint32)0x00000000U
                             | (uint32)0x00000000U
                             | (uint32)0x00000000U
                             | (uint32)0x00000000U
                             | (uint32)0x00000000U
                             | (uint32)0x00000000U
                             | (uint32)0x00000000U
                             | (uint32)0x00000000U
                             | (uint32)0x00000000U
                             | (uint32)0x00000000U
                             | (uint32)0x00000000U
                             | (uint32)0x00000000U
                             | (uint32)0x00000000U
                             | (uint32)0x00000000U
                             | (uint32)0x00000000U
                             | (uint32)0x00000000U
                             | (uint32)0x00000000U
                             | (uint32)0x00000000U
                             | (uint32)0x00000000U
                             | (uint32)0x00000000U;
    
        canREG2->INTMUXx[1U] = (uint32)0x00000000U
                             | (uint32)0x00000000U
                             | (uint32)0x00000000U
                             | (uint32)0x00000000U
                             | (uint32)0x00000000U
                             | (uint32)0x00000000U
                             | (uint32)0x00000000U
                             | (uint32)0x00000000U
                             | (uint32)0x00000000U
                             | (uint32)0x00000000U
                             | (uint32)0x00000000U
                             | (uint32)0x00000000U
                             | (uint32)0x00000000U
                             | (uint32)0x00000000U
                             | (uint32)0x00000000U
                             | (uint32)0x00000000U
                             | (uint32)0x00000000U
                             | (uint32)0x00000000U
                             | (uint32)0x00000000U
                             | (uint32)0x00000000U
                             | (uint32)0x00000000U
                             | (uint32)0x00000000U
                             | (uint32)0x00000000U
                             | (uint32)0x00000000U
                             | (uint32)0x00000000U
                             | (uint32)0x00000000U
                             | (uint32)0x00000000U
                             | (uint32)0x00000000U
                             | (uint32)0x00000000U
                             | (uint32)0x00000000U
                             | (uint32)0x00000000U
                             | (uint32)0x00000000U;
    
    
        /** - Setup auto bus on timer period */
        canREG2->ABOTR = (uint32)15U;
    
    
        /** - Initialize message 1 
        *     - Wait until IF1 is ready for use 
        *     - Set message mask
        *     - Set message control word
        *     - Set message arbitration
        *     - Set IF1 control byte
        *     - Set IF1 message number
        */
        /*SAFETYMCUSW 28 D MR:NA <APPROVED> "Potentially infinite loop found - Hardware Status check for execution sequence" */
        while ((canREG2->IF1STAT & 0x80U) ==0x80U)
        { 
        } /* Wait */
    
    
        canREG2->IF1MSK  = 0xC0000000U | (uint32)((uint32)((uint32)0x00000000U & (uint32)0x000007FFU) << (uint32)18U);
        canREG2->IF1ARB  = (uint32)0x80000000U | (uint32)0x00000000U | (uint32)0x20000000U | (uint32)((uint32)((uint32)1U & (uint32)0x000007FFU) << (uint32)18U);
        canREG2->IF1MCTL = 0x00001000U | (uint32)0x00000000U | (uint32)0x00000000U | (uint32)0x00000000U | (uint32)8U;
        canREG2->IF1CMD  = (uint8) 0xF8U;
        canREG2->IF1NO   = 1U;
    
        /** - Initialize message 2 
        *     - Wait until IF2 is ready for use 
        *     - Set message mask
        *     - Set message control word
        *     - Set message arbitration
        *     - Set IF2 control byte
        *     - Set IF2 message number
        */
        /*SAFETYMCUSW 28 D MR:NA <APPROVED> "Potentially infinite loop found - Hardware Status check for execution sequence" */
        while ((canREG2->IF2STAT & 0x80U) ==0x80U)
        { 
        } /* Wait */
    
        canREG2->IF2MSK  = 0xC0000000U | (uint32)((uint32)((uint32)0x00000000U & (uint32)0x000007FFU) << (uint32)18U);
        canREG2->IF2ARB  = (uint32)0x80000000U | (uint32)0x00000000U | (uint32)0x00000000U | (uint32)((uint32)((uint32)2U & (uint32)0x000007FFU) << (uint32)18U);
        canREG2->IF2MCTL = 0x00001000U | (uint32)0x00000000U | (uint32)0x00000000U | (uint32)0x00000000U | (uint32)8U;
        canREG2->IF2CMD  = (uint8) 0xF8U;
        canREG2->IF2NO   = 2U;
    
        /** - Setup IF1 for data transmission 
        *     - Wait until IF1 is ready for use 
        *     - Set IF1 control byte
        */
        /*SAFETYMCUSW 28 D MR:NA <APPROVED> "Potentially infinite loop found - Hardware Status check for execution sequence" */
        while ((canREG2->IF1STAT & 0x80U) ==0x80U)
        { 
        } /* Wait */
        canREG2->IF1CMD  = 0x87U;
    
        /** - Setup IF2 for reading data
        *     - Wait until IF1 is ready for use 
        *     - Set IF1 control byte
        */
        /*SAFETYMCUSW 28 D MR:NA <APPROVED> "Potentially infinite loop found - Hardware Status check for execution sequence" */
        while ((canREG2->IF2STAT & 0x80U) ==0x80U)
        { 
        } /* Wait */
        canREG2->IF2CMD = 0x17U;
    
        /** - Setup bit timing 
        *     - Setup baud rate prescaler extension
        *     - Setup TSeg2
        *     - Setup TSeg1
        *     - Setup sample jump width
        *     - Setup baud rate prescaler
        */
        canREG2->BTR = (uint32)((uint32)0U << 16U) |
                       (uint32)((uint32)(4U - 1U) << 12U) |
                       (uint32)((uint32)((6U + 4U) - 1U) << 8U) |
                       (uint32)((uint32)(4U - 1U) << 6U) |
                       (uint32)9U;		
    
    
       /** - CAN2 Port output values */
        canREG2->TIOC =  (uint32)((uint32)1U  << 18U )
                       | (uint32)((uint32)0U  << 17U )
                       | (uint32)((uint32)0U  << 16U )  
                       | (uint32)((uint32)1U  << 3U )  
                       | (uint32)((uint32)0U  << 2U )    
                       | (uint32)((uint32)0U << 1U );
                       
        canREG2->RIOC =  (uint32)((uint32)1U  << 18U )    
                       | (uint32)((uint32)0U  << 17U )  
                       | (uint32)((uint32)0U  << 16U )   
                       | (uint32)((uint32)1U  << 3U )  
                       | (uint32)((uint32)0U  << 2U )
                       | (uint32)((uint32)0U <<1U );   
    
        /** - Leave configuration and initialization mode  */
        canREG2->CTL &= ~(uint32)(0x00000041U);
    
    
    
        /**   @note This function has to be called before the driver can be used.\n
        *           This function has to be executed in privileged mode.\n
        */
    
    /* USER CODE BEGIN (5) */
    /* USER CODE END */
    }

    and Circuit diagram:

    I have no problem using cases to communicate between CAN1 and CAN2.However, communication with the USB_CAN Tool failed.

    Is it the problem of my configuration of CAN module? How do I configure to properly communicate with USB_CAN Tool?

       Looking forward to your reply.Thanks !

              Alice

  • Hello,

          Unfortunately, We  do not familiar with "USB_CAN Tool" you noted.

         Please use the CAN demo in last reply to test your hardware.

  • thank you very much ,I solved my problem.It's a hardware connection problem