CC3200 UART Interrupt problem

user1452239

Other Parts Discussed in Thread: CC3200SDK, CC3200

Now I use uart1 RX interrupt. UART0 keep the SDK code and it can wok as console. I can send data by PIN58 and also can get data by PIN57 on UART1. But it always go in FaultISR when i receiver data from UART1.

The following is code.

PinMuxConfig(void)
{
//
// Enable Peripheral Clocks
//
MAP_PRCMPeripheralClkEnable(PRCM_UARTA0, PRCM_RUN_MODE_CLK);
MAP_PRCMPeripheralClkEnable(PRCM_UARTA1, PRCM_RUN_MODE_CLK);

//
// Configure PIN_55 for UART0 UART0_TX
//
MAP_PinTypeUART(PIN_55, PIN_MODE_3);

//
// Configure PIN_57 for UART0 UART0_RX
//
MAP_PinTypeUART(PIN_57, PIN_MODE_3);

//
// Configure PIN_58 for UART1 UART1_TX
//
MAP_PinTypeUART(PIN_58, PIN_MODE_6);

//
// Configure PIN_59 for UART1 UART1_RX
//
MAP_PinTypeUART(PIN_59, PIN_MODE_6);
}

int initUart1(void)
{
uartRxBuff[0] = 0;
uartRxLength = 0;
MAP_UARTConfigSetExpClk(UARTA1_BASE,MAP_PRCMPeripheralClockGet(PRCM_UARTA1),
UART_BAUD_RATE, (UART_CONFIG_WLEN_8 | UART_CONFIG_STOP_ONE |
UART_CONFIG_PAR_NONE));
MAP_UARTFlowControlSet(UARTA1_BASE, UART_FLOWCONTROL_NONE);
MAP_UARTFIFODisable(UARTA1_BASE);
MAP_UARTIntRegister(UARTA1_BASE, Uart1IntHandler);
MAP_UARTIntEnable(UARTA1_BASE, UART_INT_RX);
MAP_UARTIntEnable(UARTA1_BASE, UART_INT_RX|UART_INT_RT);
return SUCCESS;
}

void Uart1IntHandler(void)
{
unsigned long intStatus = MAP_UARTIntStatus(UARTA1_BASE, TRUE);
if((intStatus & UART_INT_RX) && MAP_UARTCharsAvail(UARTA1_BASE))
{
uartRxLength++;
uartRxBuff[uartRxLength] = (unsigned char)MAP_UARTCharGetNonBlocking(UARTA1_BASE);
}
else if(intStatus & UART_INT_RT)
{
uartRxBuff[0] = uartRxLength;
uartRxLength = 0;
}
MAP_UARTIntClear(UARTA1_BASE, intStatus);
}

Can anybody tell me what I'm wrong here? Thanks!

over 10 years ago

0 Praveen Kumar N over 10 years ago

TI__Expert 6700 points

Hi,

I tested you code by pasting the above to the 'uart_demo' in SDK and it is working fine for me.

Please see if its your receive buffer overflowing.

And are you trying to print the 'uartRxBuff' using Report API, in that case make sure the string in the buffer is '\0' (NULL) terminated.

Thanks and Regards,
Praveen

0 user1452239 over 10 years ago in reply to Praveen Kumar N

Intellectual 280 points

Thanks for you reply. The uartRxBuff is 200, but when I got 10 bytes, it will go in FaultISR. But if I disable the UART1 INT, It's no problem. And I don't think I need the NULL to terminate, because it is supported on another part of uart1.

0 Praveen Kumar N over 10 years ago in reply to user1452239

TI__Expert 6700 points

Hi,

Are you using any OS environment ?

Does you code goes into the interrupt handler and can you use the debugger to narrow down which statement in you code is causing the Fault ?

Thanks and Regards,
Praveen

0 user1452239 over 10 years ago in reply to Praveen Kumar N

Intellectual 280 points

Yes, i use OS. But i can't debug it why my code go this FaultISR function.

0 Praveen Kumar N over 10 years ago in reply to user1452239

TI__Expert 6700 points

Which OS environment are you using FreeRTOS or TI_RTOS?

Thanks and Regards,
Praveen

0 user1452239 over 10 years ago in reply to Praveen Kumar N

Intellectual 280 points

Hi Praveen,

I am using FreeRTOS. The TI_RTOS will be used if i remove the USE_FREERTOS in Preprocessor, right?

Best Regards!

James

0 user1452239 over 10 years ago in reply to user1452239

Intellectual 280 points

I debug the problem. And found it go vTaskSwitchContext, then got the exception and call the FaultISR. Why task context switch got the problem? Is there any conflict while calling ISR and task context switch?

0 Praveen Kumar N over 10 years ago in reply to user1452239

TI__Expert 6700 points

Hi James,

This issue could occur mainly due to memory corruption. Can you try increasing the task stack size ?

Thanks and Regards,
Praveen

0 user1452239 over 10 years ago in reply to Praveen Kumar N

Intellectual 280 points

Yes I try to increase the stack size from 2048 to 4096. But I got the same problem.

0 user1452239 over 10 years ago in reply to Praveen Kumar N

Intellectual 280 points

Hi Praveen,
Can you give me any more comments?
Best Regards!
James

0 Praveen Kumar N over 10 years ago in reply to user1452239

TI__Expert 6700 points

Hi James,

Is it possible for you to share sub-set of your code which I can execute here to recreate this issue ?

Thanks and Regards,
Praveen

0 user1452239 over 10 years ago in reply to Praveen Kumar N

Intellectual 280 points

Hi Praveen,
Could you please send me your email? I send the code to you for test? My email: homaflying@gmail.com

Thanks!
James

0 user1452239 over 10 years ago in reply to Praveen Kumar N

Intellectual 280 points

HI Parveen,
I upload my test code to this link:
http://www.mongofiles.com/file/76925/UartISRTest.rar
You can extract to cc3200-sdk\example folder and reproduce this issue.

Best Regards!
James

0 Praveen Kumar N over 10 years ago in reply to user1452239

TI__Expert 6700 points

James,

I can't access shared files from my workplace. Could you please upload it to this e2e forum thread.

Here is how to do it : http://e2e.ti.com/group/helpcentral/w/e2e/148.4-5-attaching-a-file\

Thanks and Regards,

Praveen

0 user1452239 over 10 years ago in reply to Praveen Kumar N

Intellectual 280 points

UartISRTest.rar

0 user1452239 over 10 years ago in reply to user1452239

Intellectual 280 points

Hi Praveen,
Please check the code. Thanks!

Best Regards!
James

0 Praveen Kumar N over 10 years ago in reply to user1452239

TI__Expert 6700 points

James,

With your code I could easily receive 200 characters without any issue into uartRxBuff.

One next key press it goes to FaultISR. Can you please confirm if this condition is not hitting in your setup.

Simply change this uartRxBuff[uartRxLength] to uartRxBuff[uartRxLength%MAX_RX_BUFF] in the interrupt handler.

Best Regards,

Praveen

0 user1452239 over 10 years ago in reply to Praveen Kumar N

Intellectual 280 points

My version is CC31xx_CC32xx_ServicePack_1.0.0.1.2, CC3200SDK_1.0.0 and IAR 7.30. Hardware is CC3200-LAUNCHHXL REV 4.1. Is it the same condition with your side? And any comments?

0 Praveen Kumar N over 10 years ago in reply to user1452239

TI__Expert 6700 points

Hi James,

Can you try patching the IAR FTDI driver dll as given in the readme under cc3200-sdk\tools\iar_patch\

Thanks and Regards,
Praveen

0 Praveen Kumar N over 10 years ago in reply to Praveen Kumar N

TI__Expert 6700 points

James,

Please keep backup of the original dll in the installation.

Regards,
Praveen

0 user1452239 over 10 years ago in reply to Praveen Kumar N

Intellectual 280 points

I can get the error if i use this patch dll. Is IAR version not compatible？

0 Praveen Kumar N over 10 years ago in reply to user1452239

TI__Expert 6700 points

James,

Apologies for that, I missed the IAR version you mentioned, we had a known issue with IAR 7.20 for which the patch was released.

I tried your code on IAR 7.30.4 (a fresh installation), CC3200SDK_1.0.0, CC3200-LAUNCHHXL REV 4.1 but still I am not able to recreate your issue.

From your shared code you are using UARTA0 only for Displaying banner, there is only one task 'ZigbeeUartParse' which keeps printing something on UARTA1 and the interrupt handler is responsible for receiving on UARTA1. Is my understanding correct?

I am only feed characters to UARTA1 interface.

See the image below, I used the wlan_ap.out file you had shared instead of compiling it on my setup. I could receive 10 characters without any issue, the code is still looping in prvIdleTask not in FaultISR.

Thanks and Regards,

Praveen

0 user1452239 over 10 years ago in reply to Praveen Kumar N

Intellectual 280 points

Hi Praveen,
Thanks a lot for your reply. Now I found my problem. The receiver buffer is overflow. I made a mistake to send data to CC3200 from another demo board. This problem blocks me one week. Thanks again.
Another little question is how can I go RT interrupt. I already enable the RT by MAP_UARTIntEnable(UARTA1_BASE, UART_INT_RX|UART_INT_RT); But I can't get the RT interrupt.

Best Regards!
James

0 Praveen Kumar N over 10 years ago in reply to user1452239

TI__Expert 6700 points

Hi James,

RT interrupt is only for FIFO mode. Since you are disabling your FIFO you are not receiving this.

See the description at section 6.2.3.3 Interrupts in the CC3200 TRM.

Thanks and Regards,

Praveen

0 user1452239 over 10 years ago in reply to Praveen Kumar N

Intellectual 280 points

Thanks Praveen.

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CC3200 UART Interrupt problem