USART is really working in stmp157 ?

[Vipul]

Hi All,

i am using stmp157 customize board, with linux yocto build system, and using USART1 configure as a hardware flow control RS 232, and RTO interrupt.

 

and what i found is that CTSIF is not toggling and the proper status are not getting update on CTS from USART SR register. on plug and unplug the usart cable,

 

i expect when unplug the cable i should get CTSIF event and the status of CTS line.

 

where the USART1, tx, rx, rts, cts all are set to alternate function and i confirm the linux cflag in stm32-uart.c is true, which the cr3 reg- CTSE and RTSE got set.

 

1.  unplug/ or removing any one of line, i do see still tx is sending the characters/frames,

2. unplug and plug activity checking with or without other device, but i observe the USART cts line is toggling on the oscilloscope.

3. but no interrupt is been observed on stm32_interrupt(irq, *ptr) - stm32-usart.c

 

Has any one faced this issue on your board and fixed it please do let me know. Thank you.

 

 

[Vipul]

Hello expertise! Could you provide information? Let me know if you need more details.

Thanks!

[Vipul]

Hello Anyone is there to help me on this issue,

Please give me guidance for this problem.

 

 

thanks.