LPUART_DRV_SendDataPolling is risky

zhiguoguo — Wed, 18 Sep 2024 02:02:36 GMT

when two tasks call this function at the same time, it can cause it to go into an endless loop.

for example:

if one task is printing data , but task scheduling otther task. other task also print data. when it comlete print data, it would disable transmitter. if so , when come back to first task , it will go into endless loop.

Re: LPUART_DRV_SendDataPolling is risky

PavelL — Wed, 18 Sep 2024 10:34:57 GMT

Hi,

it is a general issue when two tasks share the same HW resource - a workaround need to be programmed.

You need to use semaphore/mutex - see Semaphore (programming) - Wikipedia.

Best regards,

Pavel

S32K中的主题 LPUART_DRV_SendDataPolling is risky

LPUART_DRV_SendDataPolling is risky

Re: LPUART_DRV_SendDataPolling is risky