UART with DMA mode

[muhammad]

Posted on June 16, 2012 at 15:32

hi 

everyoneneed help regarding UART with DMA mode,i am using STM32F407 Discovery Board,i want to configure UART4 with DMA, and want it to generate interrupt when DMA completes filling the memory. so should i configure the UART4's interrupt initializations also or only DMA interrupt initializations. I've attached my code. any help will be appreciated a lot.  #selective-cut-n-paste #uart-usart-dma-interrupt

[khandaynial_2000]

Posted on July 24, 2016 at 21:12hi Clive1I am using DMA on uart4 and code is runing perfectly but there is a problem i can fatch data from dma buffer only when it have filled by 16 bytes . in my application i need to fatch data from buffer byte by byte please help as soon as possible 

[Tesla DeLorean]

Posted on July 25, 2016 at 03:24

You should probably consider just using an interrupt (IRQ) for RXNE to manage the bytes as they arrive, 

[khandaynial_2000]

Posted on July 25, 2016 at 09:32I am reading data from multiple devices and each device can send its data on same time so by using Interrupt i will again i miss data .