TI中文支持网我在DSP28335 的开发板上测试回环程序，把0-15邮箱用来，16-31用来接收，下面是循环程序
for(;;)
{
ECanbRegs.CANTRS.all = 0x0000FFFF; // Set TRS for all transmit mailboxes
while(ECanbRegs.CANTA.all != 0x0000FFFF ) {} // Wait for all TAn bits to be set..
ECanbRegs.CANTA.all = 0x0000FFFF; // Clear all TAn
MessageReceivedCount++;
//Read from Receive mailboxes and begin checking for data */
for(j=0; j<16; j++) // Read & check 16 mailboxes
{
mailbox_read(j); // This func reads the indicated mailbox data
mailbox_check(TestMbox1,TestMbox2,TestMbox3); // Checks the received data
}
if(MessageReceivedCount > 100)
{
if(ErrorCount == 0)
{
asm(" ESTOP0"); // OK
}
else
{
asm(" ESTOP0"); // ERROR
}
}
}
我发现程序运行时停在 asm(" ESTOP0"); // OK 这句，意思是接收的数据错误为0，系统停止，但是当我想看CANTX和CANRX端输出的波形时，把下面判断的部分删除，即保留
for(;;)
{
ECanbRegs.CANTRS.all = 0x0000FFFF; // Set TRS for all transmit mailboxes
while(ECanbRegs.CANTA.all != 0x0000FFFF ) {} // Wait for all TAn bits to be set..
ECanbRegs.CANTA.all = 0x0000FFFF; // Clear all TAn
MessageReceivedCount++;
//Read from Receive mailboxes and begin checking for data */
for(j=0; j<16; j++) // Read & check 16 mailboxes
{
mailbox_read(j); // This func reads the indicated mailbox data
mailbox_check(TestMbox1,TestMbox2,TestMbox3); // Checks the received data
}
}
这时候引脚上却测不到波形，请问是为什么呢？
Susan Yang：您可以测试一下 C:\ti\controlSUITE\device_support\f2833x\v142\DSP2823x_examples_ccsv5\ecan_back2back，该程序内使用了self-test mode/loopback
我在DSP28335 的开发板上测试回环程序，把0-15邮箱用来，16-31用来接收，下面是循环程序
for(;;)
{
ECanbRegs.CANTRS.all = 0x0000FFFF; // Set TRS for all transmit mailboxes
while(ECanbRegs.CANTA.all != 0x0000FFFF ) {} // Wait for all TAn bits to be set..
ECanbRegs.CANTA.all = 0x0000FFFF; // Clear all TAn
MessageReceivedCount++;
//Read from Receive mailboxes and begin checking for data */
for(j=0; j<16; j++) // Read & check 16 mailboxes
{
mailbox_read(j); // This func reads the indicated mailbox data
mailbox_check(TestMbox1,TestMbox2,TestMbox3); // Checks the received data
}
if(MessageReceivedCount > 100)
{
if(ErrorCount == 0)
{
asm(" ESTOP0"); // OK
}
else
{
asm(" ESTOP0"); // ERROR
}
}
}
我发现程序运行时停在 asm(" ESTOP0"); // OK 这句，意思是接收的数据错误为0，系统停止，但是当我想看CANTX和CANRX端输出的波形时，把下面判断的部分删除，即保留
for(;;)
{
ECanbRegs.CANTRS.all = 0x0000FFFF; // Set TRS for all transmit mailboxes
while(ECanbRegs.CANTA.all != 0x0000FFFF ) {} // Wait for all TAn bits to be set..
ECanbRegs.CANTA.all = 0x0000FFFF; // Clear all TAn
MessageReceivedCount++;
//Read from Receive mailboxes and begin checking for data */
for(j=0; j<16; j++) // Read & check 16 mailboxes
{
mailbox_read(j); // This func reads the indicated mailbox data
mailbox_check(TestMbox1,TestMbox2,TestMbox3); // Checks the received data
}
}
这时候引脚上却测不到波形，请问是为什么呢？
Shaochen Wang：
回复 Susan Yang:
还是没有波形。。。
我在DSP28335 的开发板上测试回环程序，把0-15邮箱用来，16-31用来接收，下面是循环程序
for(;;)
{
ECanbRegs.CANTRS.all = 0x0000FFFF; // Set TRS for all transmit mailboxes
while(ECanbRegs.CANTA.all != 0x0000FFFF ) {} // Wait for all TAn bits to be set..
ECanbRegs.CANTA.all = 0x0000FFFF; // Clear all TAn
MessageReceivedCount++;
//Read from Receive mailboxes and begin checking for data */
for(j=0; j<16; j++) // Read & check 16 mailboxes
{
mailbox_read(j); // This func reads the indicated mailbox data
mailbox_check(TestMbox1,TestMbox2,TestMbox3); // Checks the received data
}
if(MessageReceivedCount > 100)
{
if(ErrorCount == 0)
{
asm(" ESTOP0"); // OK
}
else
{
asm(" ESTOP0"); // ERROR
}
}
}
我发现程序运行时停在 asm(" ESTOP0"); // OK 这句，意思是接收的数据错误为0，系统停止，但是当我想看CANTX和CANRX端输出的波形时，把下面判断的部分删除，即保留
for(;;)
{
ECanbRegs.CANTRS.all = 0x0000FFFF; // Set TRS for all transmit mailboxes
while(ECanbRegs.CANTA.all != 0x0000FFFF ) {} // Wait for all TAn bits to be set..
ECanbRegs.CANTA.all = 0x0000FFFF; // Clear all TAn
MessageReceivedCount++;
//Read from Receive mailboxes and begin checking for data */
for(j=0; j<16; j++) // Read & check 16 mailboxes
{
mailbox_read(j); // This func reads the indicated mailbox data
mailbox_check(TestMbox1,TestMbox2,TestMbox3); // Checks the received data
}
}
这时候引脚上却测不到波形，请问是为什么呢？
Shaochen Wang：
官方例程试了，在程序里看寄存器的数值变化是正确的，但是测波形就是没有，我在怀疑是不是自测模式下看不到波形，有做过的吗
