Kinetis Software Development Kit中的主题 freeRTOS_UART example faults in UART_RTOS_Send

freeRTOS_UART example faults in UART_RTOS_Send

bgraham — Wed, 24 Jul 2019 23:15:21 GMT

MCUXpresso IDE v11.0.0 [Build 2516] [2019-06-05]

Device: MKL26Z256xxx4

SDK_2.x_MKL26Z256xxx4 2.4.1

I started with the freeRTOS_UART example project.

I had to change the MCU and package.

See attached project

My custom board has a MKL26Z256 that is connected to a modem at 115200.

In fsl_uart_freertos.c, UART_RTOS_Send() calls UART_TransferSendNonBlocking().

The problem is that UART_RTOS_Send()'s 2nd parameters is not a uart_handle_t *.

This causes a fault when UART_TransferSendNonBlocking() attempts to deference the bad pointer.

Call stack:

Thread #2 536867576 (Uart_task : Running [P: 4]) (Suspended : Breakpoint)
UART_TransferSendNonBlocking() at fsl_uart.c:734 0x18a0
UART_RTOS_Send() at fsl_uart_freertos.c:229 0x6e8e
uart_task() at freertos_uart.c:133 0x5ec
pxPortInitialiseStack() at port.c:102 0x2dfc

The amazon-freertos code appears to be out of sync with the generated drivers files.

Does anyone have a suggestion that will correct this?

Thanks,

Bruce

Re: freeRTOS_UART example faults in UART_RTOS_Send

danielchen — Fri, 26 Jul 2019 07:11:49 GMT

Hi Bruce：

I debugged your code on my board. Please see below picture.

The parameters transfer is OK.

In your project, the variable "handle" address <0x15> is in flash, so it will result from a hardfault.

I increased the stack size , then it can work on my side.

xTaskCreate(uart_task, "Uart_task", configMINIMAL_STACK_SIZE + 200, NULL, uart_task_PRIORITY, NULL);

Could you please double check ?

Regards

Daniel

Re: freeRTOS_UART example faults in UART_RTOS_Send

bgraham — Fri, 26 Jul 2019 13:38:48 GMT

Yep, stack corruption.

I forget to increase the stack size.

Now to sort out why the UART RX is always giving me a kStatus_UART_RxHardwareOverrun in the UART callback.

Thanks,

Bruce