UART DMA & IRQs

[stefano239955_stm1_stmicro]

Posted on September 27, 2006 at 15:37

UART DMA & IRQs

[stefano239955_stm1_stmicro]

Posted on May 17, 2011 at 09:31

I have another question about the UART

I'd like to transmit data with the dma.

At the same time I'd like to receive data using the IRQ

(see the init code of post UART DMA).

Now I found that the rx irq is not asserted if I have the DMA enable for tx.

Any suggestion?

Have I to manage the rx with DMA IRQ ?

[stefano239955_stm1_stmicro]

Posted on May 17, 2011 at 09:31

I answer to myself hoping could help some other

person involved in a similar issue :D

I found the bug in my code!

I didn't initialize the GPIOIN for pin 6.

Now I configured pin 6 as Alternate1 (UART0_RX)

and the irq works.

In any case is a strange behavior! without the dma

transfer enabled the rx irq is asserted!

OK, ok.. the micro is new... but I'm becoming nearly crazy ;)

[saxo111]

Posted on May 17, 2011 at 09:31

Hello,

sorry to directly contact you but i am student and I got a report to do aboutr MCU. I have to compare ST, Philips, Atmel, OKI component integrating ARM7 cpu.

Could you help me??

I will have few question regarding the I/O voltage or erasing time for the flash...I think simple question...

Thank you!!

Let me know if I can send you some email with question....I sent directly to the forum but I feel like nobody will reply soon...

Ciao,

Saxo