STM32Cube HAL_UART_Transmit_DMA strange behaviour

[jesper]

Posted on January 27, 2015 at 21:17

I have built a system using STM32CubeMX 4.5 and STM32Cube v1.1.0 for a F072 CPU.

I just started implementing the UART parts. I want to run using DMA, but I can't get it to work. A call like

HAL_UART_Transmit_DMA( &huart3, string, size )

always outputs

size

characters of

string[0]

. In other words, the correct number of characters are transmitted, but they are all repeats of the first character in the string. If I use the blocking version of the call (without

_DMA

but with a timeout) all is fine and the output is correct. ...any pointers???

[Andrei Chichak]

Posted on January 27, 2015 at 22:14

Did you configure the DMA controller to autoincrement the memory pointer?

[kudiarasum]

Posted on December 22, 2015 at 11:47

Hi,

I too facing same issue, did you solved the issue?

[Nickname5522_O]

Posted on December 22, 2015 at 18:56

Hi murugesan.kudiarasu,

Which version of STM32CubeMx and STM32 firmware package are you using?Did you enable the DMA IRQ handler (HAL_DMA_IRQHandler() )?-Shahrzad-