STM32F091 USART Idle line or Receiver Timeout Issue. Interrupts not firing. HAL Drivers

[MMana.519]

I have a requirement for receiving some long USART packets. (200 to 300 bytes). They can be of variable lengths. I did not want to poll or trigger interrupts for each byte and watch for a Stop byte symbol. But been trying to get the Idle line or Receiver Timeout feature but the interrupts are not firing correctly.

I am using HAL drivers.

Are there any known issues with these features ? Any knows workarounds that I am missing ?

[waclawek.jan]

Check that the respective interrupts are enabled having set respective bits in USARTx_CR1 (RTOIE, IDLEIE) and for the timeout, that RTOEN is set in USARTx_CR2 (note that this feature is available only for some USARTs, in 'F09x for USART1-USART3). Check by reading out NVIC registers if the interrupt is enabled. Check in disassembly that ISR has the proper name and is properly inserted into the vector table.

JW

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