printf while using UART in DMA mode

Question

Hi, 
 silly question 
 i am playing with a ADZS-BF592-EZLITE board. I imported CharECHO_UART example but, after activating DMA mode with: 
 eResult = adi_uart_EnableDMAMode(hDevice, true); 
 the first printf method generates this error: 
 A non-recoverable error or exception has occurred. Description: An illegal data memory access has occurred. General Type: RunTimeError Specific Type: DCPLBProtectionViolation Error PC: 0xffa01440 
 This error does not happens if i do not use DMA mode. 
 It looks like printf is writing something into memory instead of printing on console

santha.vijay · Accepted Answer

Hi, 
 We have identified the root cause of the issue. In the driver source code, A non-recoverable error error throws because of mismatch between ADI_UART_BIDIR_INT_MEMORY_SIZE and (sizeof(ADI_UART_DEVICE)+sizeof (UART_DATA_CHANNEL)*2u) values in CCES 2.11.0. So we need to increase the ADI_UART_BIDIR_INT_MEMORY_SIZE value from 416 to 446 inside the adi_uart_bf5xx.h file. Please refer the attached image for your reference. After this change we can run the CharEcho_Uart example project in CCES 2.11.0. 
 We will fix this in future release of CCES. 
 Best Regards, Santhakumari.K)

akirapix77 · Answer

ok perfect. 
 thanks

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printf while using UART in DMA mode