topic Re: The problem of using LPUART in s32k144 with FreeRTOS in S32K

The problem of using LPUART in s32k144 with FreeRTOS

zhangxujun1981 — Sun, 28 Aug 2022 04:09:32 GMT

If don't use freeRTOS , The function LPUART_DRV_SendDataBlocking(INST_LPUART1, (uint8_t *)str, strlen(str), UART_TIMEOUT) works well. But if import freeRTOS to project , this function only tx the first one byte, and never back.
even I set the priority of LPUART1_RxTx_IRQn bigger then configMAX_SYSCALL_INTERRUPT_PRIORITY , but it still send only one byte.

The init code :
/* Initialize LPUART instance */
LPUART_DRV_Init(INST_LPUART1, &lpuart1_State, &lpuart1_InitConfig0);

INT_SYS_SetPriority(LPUART1_RxTx_IRQn,configMAX_SYSCALL_INTERRUPT_PRIORITY + 2 );
INT_SYS_EnableIRQ(LPUART1_RxTx_IRQn);

Thanks !

Re: The problem of using LPUART in s32k144 with FreeRTOS

danielmartynek — Mon, 29 Aug 2022 10:01:07 GMT

Hello @zhangxujun1981,

It was discussed in this thread:

https://community.nxp.com/t5/S32-SDK/Send-Data-using-Blocking-method-within-FreeRTOS-Fail/td-p/1425999

Please have a look.

Thanks,

BR, Daniel

Re: The problem of using LPUART in s32k144 with FreeRTOS

zhangxujun1981 — Thu, 01 Sep 2022 05:33:06 GMT

Thanks!