wlink serial monitor is strange

[joyhope]

I found wlink serial output is strange. I am using linux platform the default wch-linkE is using /devt/ttyACM0. I use putty to get serial output. Sometime the output is very very slow, it could buffered output.

e.g I using ch32v203 EVB board.

1. I confirmed FreeRTOS demo is working: two tasks could output information. Which means the hardware and serial output is working. And then I use SDI_Print demo (default is using UART1 115200), but there is no output in the putty.
2. I rerun the FreeRTOS demo, and then, SDI_PPRINT output displayed one by one, it slowly outputs the information. after n seconds, I could see FreeRTOS serial output.

The serial output is very strange, I could redo it. It seems at certain condition, the output is buffered by Link. I do not know why.

[joyhope]

Sorry, it seems putty software problem. I switch to cutecom, no such problem.