An error occurs when writing to UART

[jyijyi]

You can refer to this application:

[WP7605][SW] Testing 8-wire UART1 by ioctrl( )

We use this test app to test UART_Test1 (1).rar (105.3 KB) BTW, do you have the test build for FW R17? If no, it is meaningless as the fix is on R17.