STM32L0 with 2 USART ports in combined mode problem

[tropinka06]

Posted on December 27, 2015 at 15:58

Hi.

I am trying to work with STM32L051x8 MCU (IAR 7.2 IDE) with 2 USART ports in combined mode:

1)      RX define and operate in Interrupt mode.

2)      TX define and operate in DMA mode.

When I configure RX and TX to IRQ mode I view both RX and TX operations. But in combined mode (as described below) I don't view any activity on USART communication.

Attached very simple project with combined configuration. For start DMA transaction I set variable ''ready'' = '1'.

Can you help to find the problem: why communication does not work?

Thanks.

Evgeni