ch55xduino - CH552 serial print to txd port

ch55xduino uses SDCC for compiling. Therefore no c++ syntax is allowed.

try using the underscore instead of the dot. e.g. Serial1_println("Hello World");

and for output at P3.1 Serial0_println();

Hello Thomas,

Thanks for your suggestions, unfortunately I'm still not getting any data out on ant of the ports.

I have tried to connect my serial capture program ( RealTerm ) to any port without result.

When I connect Rx to TX my serial capture program, the capture program echo what I type, so I'm sure the capture program works fine.

I also have no compile error, so looks like CHxxDuino accept:

• Serial0_println("Hello World");
• Serial1_println("Hello World");

USBSerial_println("Hello World"); works fine ! using Arduino Serial Monitor.

Any other suggestions ?

void setup() { }

void loop() { Serial0_println("Hello World"); // print to P1.7 Serial1_println("Hello World"); // print to P3.1 USBSerial_println("Hello World"); // print to USB ( Works fine ) delay(100); }

I dont use Arduino code on that board, so my knowledge is very limited.

But here is the thing: Output on TX0 or TX1 usually requires to TI =1 (U1TI = 1) in Non Interrupt mode to signal the transmiter is empty. I suppose this is done in Serial0_begin() and Serial1_begin().

void setup() { Serial0_begin(9600); Serial1_begin(9600); }

void loop() { Serial0_println("Hello World0"); // print to P1.7 Serial1_println("Hello World1"); // print to P3.1 USBSerial_println("Hello World"); // print to USB ( Works fine ) delay(100); }

I appreciate your advice, but regrettably I'm still not able to pull any data out of any of the ports.

Pierre B. wrote:

I appreciate your advice, but regrettably I'm still not able to pull any data out of any of the ports.

Could You already successfully run any of the examples? Maybe Your problem is located in a lower level.

Best regards Klaus