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DMA-USART Example

Question asked by fm on Sep 3, 2013
Latest reply on Sep 4, 2013 by fm
hello,

at the moment i'm working on the DMA-USART example from the FW library  to fit into my application.
the transmitting process(uC=> PC) is working as estimated, but the problem is i have to update the "DMA_InitStructure.DMA_BufferSize " (as you can see in line 216 \STM32F4xx_DSP_StdPeriph_Lib_V1.1.0\Project\STM32F4xx_StdPeriph_Examples\USART\USART_TwoBoards\USART_DataExchangeDMA)

Is it necessary to call everytime(for updating the BUFFERSIZE) to call the whole function in the main routine?

Is it normal to change this value ?
(as i have seen it in other examples till now, this value is only initialized once)

thanks, best regards
m

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