EVB_YTM32B1MD1x LINFlexD - UART cannot be achievable with baud rate 1Mbit/s

[junhanhuang]

Can you upload your YCT file for us to check

[xianghan]

The LinflexD peripheral clock source selects the PLL because the FIRC clock has a higher margin of error. When the UART baudrate increases, this can be affected, resulting in error frames.

[xianghan]

[tuanduong]

The issue has been showed with baud rate.

[tuanduong]

The YTM32B1MD1x LINFlexD -UART has not been supported with DMA.
Do you have any idea to use UART with DMA? xianghan

[xianghan]

LINFlexD UART模式使用DMA传输异常数据解决方案.pdf

[tuanduong]

thanks for your information, I will try to do it.

[tuanduong]

I have enabled DMA with LinflexD1_RX and LinflexD1_Tx trigger.
For transfer: when I use LinflexD1 as Uart send out data, DMA work normally.
For receive: When I use LinflexD1 as UArt receive data, DMA cannot work.
Phenomenon: data in LinflexD.Data[4] is detected by Linflex, but it cannot trigger DMA copy data to rx_buffer. It seem like the source trigger LinflexD1_Rx is not work. DO you have any idea about this situation? xianghan

[tuanduong]

[tuanduong]

Hello xianghan , you can check the reference manual, that is DMA mux table for YTM32B1MD1x do not support for UART DMA.

[tuanduong]

Hello xianghan,
The issue has been showed. Thanks for your support.