TI中文支持网Part Number:TMS320F28335
使用官方的示例程序（ecan_a_to_b_xmit）修改can通信 程序仿真会在如图所示的位置死循环 can的中断标志无法置位
修改后程序代码如下：
//###########################################################################
// Description
//! \addtogroup f2833x_example_list
//! <h1>eCAN-A to eCAN-B Trasmit Loop (ecan_a_to_b_xmit)</h1>
//!
//! This example TRANSMITS data to another CAN module using MAILBOX5
//! This program could either loop forever or transmit "n" # of times,
//! where "n" is the TXCOUNT value. \n
//!
//! This example can be used to check CAN-A and CAN-B. Since CAN-B is
//! initialized in DSP2833x_ECan.c, it will acknowledge all frames
//! transmitted by the node on which this code runs. Both CAN ports of
//! the 2833x DSP need to be connected to each other (via CAN transceivers)
//!
//! \b External \b Connections \n
//! - ECanb is on GPIO31 (CANTXA) and GPIO30 (CANRXA)
//! - eCANB is on GPIO8 (CANTXB) and GPIO10 (CANRXB)
//! - Connect ECanb to eCANB via CAN transceivers
//
//###########################################################################
// $TI Release: F2833x/F2823x Header Files and Peripheral Examples V142 $
// $Release Date: November 1, 2016 $
// $Copyright: Copyright (C) 2007-2016 Texas Instruments Incorporated -
//http://www.ti.com/ ALL RIGHTS RESERVED $
//###########################################################################
#include "DSP2833x_Device.h"// DSP2833x Headerfile Include File
#include "DSP2833x_Examples.h"// DSP2833x Examples Include File
#define TXCOUNT 100 // Transmission will take place (TXCOUNT) times..
// Globals for this example
longi;
longloopcount = 0;
void main()
{
// Create a shadow register structure for the CAN control registers. This is
// needed, since only 32-bit access is allowed to these registers. 16-bit access
// to these registers could potentially corrupt the register contents or return
// false data.struct ECAN_REGS ECanbShadow;
// Step 1. Initialize System Control:
// PLL, WatchDog, enable Peripheral Clocks
// This example function is found in the DSP2833x_SysCtrl.c file.InitSysCtrl();
// Step 2. Initialize GPIO:
// This example function is found in the DSP2833x_Gpio.c file and
// illustrates how to set the GPIO to it's default state.
// InitGpio(); // Skipped for this example
// Just initialize eCAN pins for this example
// This function is in DSP2833x_ECan.cInitECanGpio();
// Step 3. Clear all interrupts and initialize PIE vector table:
// Disable CPU interruptsDINT;
// Initialize the PIE control registers to their default state.
// The default state is all PIE interrupts disabled and flags
// are cleared.
// This function is found in the DSP2833x_PieCtrl.c file.InitPieCtrl();
// Disable CPU interrupts and clear all CPU interrupt flags:IER = 0x0000;IFR = 0x0000;
// Initialize the PIE vector table with pointers to the shell Interrupt
// Service Routines (ISR).
// This will populate the entire table, even if the interrupt
// is not used in this example. This is useful for debug purposes.
// The shell ISR routines are found in DSP2833x_DefaultIsr.c.
// This function is found in DSP2833x_PieVect.c.InitPieVectTable();
// Interrupts that are used in this example are re-mapped to
// ISR functions found within this file.
// No interrupts used in this example.
// Step 4. Initialize all the Device Peripherals:
// This function is found in DSP2833x_InitPeripherals.c
// InitPeripherals(); // Not required for this example
// In this case just initialize eCAN-A and eCAN-B
// This function is in DSP2833x_ECan.cInitECan();
// Step 5. User specific code:
/* Write to the MSGID field */ECanbMboxes.MBOX25.MSGID.all = 0x95555555; // Extended Identifier
/* Configure Mailbox under test as a Transmit mailbox */ECanbShadow.CANMD.all = ECanbRegs.CANMD.all;ECanbShadow.CANMD.bit.MD25 = 0;ECanbRegs.CANMD.all = ECanbShadow.CANMD.all;
/* Enable Mailbox under test */ECanbShadow.CANME.all = ECanbRegs.CANME.all;ECanbShadow.CANME.bit.ME25 = 1;ECanbRegs.CANME.all = ECanbShadow.CANME.all;
/* Write to DLC field in Master Control reg */ECanbMboxes.MBOX25.MSGCTRL.bit.DLC = 8;
/* Write to the mailbox RAM field */ECanbMboxes.MBOX25.MDL.all = 0x01234567;ECanbMboxes.MBOX25.MDH.all = 0x89ABCDEF;
/* Begin transmitting */for(i=0; i < TXCOUNT; i++){ECanbShadow.CANTRS.all = 0;ECanbShadow.CANTRS.bit.TRS25 = 1;// Set TRS for mailbox under testECanbRegs.CANTRS.all = ECanbShadow.CANTRS.all;do{ ECanbShadow.CANTA.all = ECanbRegs.CANTA.all;} while(ECanbShadow.CANTA.bit.TA25 != 1 );// Wait for TA5 bit to be set..ECanbShadow.CANTA.all = 0;ECanbShadow.CANTA.bit.TA25 = 1;// Clear TA5ECanbRegs.CANTA.all = ECanbShadow.CANTA.all;loopcount ++;}__asm(" ESTOP0"); // Stop here
}
Green Deng：
额，你好，还请明确标注一下修改的是哪些地方，否则这么一句句对照效率太低了
,
liu patrick：
你好 感谢回复 官方的例程仿真同样会卡在这个位置 CANTA无法置一
官方例程代码：
//########################################################################### // Description //! \addtogroup f2833x_example_list //! <h1>eCAN-A to eCAN-B Trasmit Loop (ecan_a_to_b_xmit)</h1> //! //! This example TRANSMITS data to another CAN module using MAILBOX5 //! This program could either loop forever or transmit "n" # of times, //! where "n" is the TXCOUNT value. \n //! //! This example can be used to check CAN-A and CAN-B. Since CAN-B is //! initialized in DSP2833x_ECan.c, it will acknowledge all frames //! transmitted by the node on which this code runs. Both CAN ports of //! the 2833x DSP need to be connected to each other (via CAN transceivers) //! //! \b External \b Connections \n //! - eCANA is on GPIO31 (CANTXA) and GPIO30 (CANRXA) //! - eCANB is on GPIO8 (CANTXB) and GPIO10 (CANRXB) //! - Connect eCANAto eCANB via CAN transceivers // //########################################################################### // $TI Release: F2833x/F2823x Header Files and Peripheral Examples V142 $ // $Release Date: November1, 2016 $ // $Copyright: Copyright (C) 2007-2016 Texas Instruments Incorporated - //http://www.ti.com/ ALL RIGHTS RESERVED $ //############################################################################include "DSP2833x_Device.h"// DSP28 Headerfile Include File #include "DSP2833x_Examples.h"// DSP28 Examples Include File#define TXCOUNT100// Transmission will take place (TXCOUNT) times..// Globals for this example longi; longloopcount = 0;void main() { // Create a shadow register structure for the CAN control registers. This is // needed, since only 32-bit access is allowed to these registers. 16-bit access // to these registers could potentially corrupt the register contents or return // false data.struct ECAN_REGS ECanaShadow;// Step 1. Initialize System Control: // PLL, WatchDog, enable Peripheral Clocks // This example function is found in the DSP2833x_SysCtrl.c file.InitSysCtrl();// Step 2. Initialize GPIO: // This example function is found in the DSP2833x_Gpio.c file and // illustrates how to set the GPIO to it's default state. // InitGpio();// Skipped for this example// Just initialize eCAN pins for this example // This function is in DSP2833x_ECan.cInitECanGpio();// Step 3. Clear all interrupts and initialize PIE vector table: // Disable CPU interruptsDINT;// Initialize the PIE control registers to their default state. // The default state is all PIE interrupts disabled and flags // are cleared. // This function is found in the DSP2833x_PieCtrl.c file.InitPieCtrl();// Disable CPU interrupts and clear all CPU interrupt flags:IER = 0x0000;IFR = 0x0000;// Initialize the PIE vector table with pointers to the shell Interrupt // Service Routines (ISR). // This will populate the entire table, even if the interrupt // is not used in this example.This is useful for debug purposes. // The shell ISR routines are found in DSP2833x_DefaultIsr.c. // This function is found in DSP2833x_PieVect.c.InitPieVectTable();// Interrupts that are used in this example are re-mapped to // ISR functions found within this file.// No interrupts used in this example.// Step 4. Initialize all the Device Peripherals: // This function is found in DSP2833x_InitPeripherals.c // InitPeripherals(); // Not required for this example// In this case just initialize eCAN-A and eCAN-B // This function is in DSP2833x_ECan.cInitECan();// Step 5. User specific code:/* Write to the MSGID field*/ECanaMboxes.MBOX25.MSGID.all = 0x95555555; // Extended Identifier/* Configure Mailbox under test as a Transmit mailbox */ECanaShadow.CANMD.all = ECanaRegs.CANMD.all;ECanaShadow.CANMD.bit.MD25 = 0;ECanaRegs.CANMD.all = ECanaShadow.CANMD.all;/* Enable Mailbox under test */ECanaShadow.CANME.all = ECanaRegs.CANME.all;ECanaShadow.CANME.bit.ME25 = 1;ECanaRegs.CANME.all = ECanaShadow.CANME.all;/* Write to DLC field in Master Control reg */ECanaMboxes.MBOX25.MSGCTRL.bit.DLC = 8;/* Write to the mailbox RAM field */ECanaMboxes.MBOX25.MDL.all = 0x55555555;ECanaMboxes.MBOX25.MDH.all = 0x55555555;/* Begin transmitting */for(i=0; i < TXCOUNT; i++){ECanaShadow.CANTRS.all = 0;ECanaShadow.CANTRS.bit.TRS25 = 1;// Set TRS for mailbox under testECanaRegs.CANTRS.all = ECanaShadow.CANTRS.all;do{ECanaShadow.CANTA.all = ECanaRegs.CANTA.all;} while(ECanaShadow.CANTA.bit.TA25 == 0 );// Wait for TA5 bit to be set..ECanaShadow.CANTA.all = 0;ECanaShadow.CANTA.bit.TA25 = 1;// Clear TA5ECanaRegs.CANTA.all = ECanaShadow.CANTA.all;loopcount ++;}__asm(" ESTOP0");// Stop here }
,
Green Deng：
抱歉，你上传的自己代码可能是选择的TXT格式的，所以看起来实在有点累。
就例程而言，卡在这个位置的话说明传输不成功，不知道你这边的硬件上有没有根据例程中提示的进行连接？即通过CAN收发器连接CANA和CANB
//! \b External \b Connections \n//! – eCANA is on GPIO31 (CANTXA) and GPIO30 (CANRXA)//! – eCANB is on GPIO8 (CANTXB) and GPIO10 (CANRXB)//! – Connect eCANA to eCANB via CAN transceivers
,
liu patrick：
感谢您 我的问题已经解决 can分析仪没配置对。。。。
