CH32x033F8P6 How to use multiple serial ports

[vuhazu]

i redefined serial pin ( PA10, PA11 )
it works, but can't use Serial2 or Serial3

// UART Definitions
#ifndef SERIAL_UART_INSTANCE
#define SERIAL_UART_INSTANCE 1
#endif
// Default pin used for generic 'Serial' instance
// Mandatory for Firmata
#ifndef PIN_SERIAL_RX
#define PIN_SERIAL_RX PA11
#endif
#ifndef PIN_SERIAL_TX
#define PIN_SERIAL_TX PA10
#endif

[maxint-rd]

Interesting!

In the past days I've been testing my CH32X033F8P6 chips. I made a new variant within the CH32X035 board to improve use of digitalWrite, analogWrite and analogRead. (intend to make that a PR sometime soon).

I tested Serial only on pins PA2/PA3 by setting PIN_SERIAL_RX and PIN_SERIAL_TX near line 113 in the file variant_CH32X033F8P6 .h, deep down the /variants folder. A few lines higher there is a definition for SERIAL_UART_INSTANCE. It is set to 1. I have not dived into that yet, but maybe that definition affects the available serial ports or perhaps only the active port. I've seen that the V203 QT PY sets SERIAL_UART_INSTANCE to 2...

BTW. My PR #145 for interrupt driven Serial1 (with available() peek() and improved read()) was developed for the V003, but other people confirmed it working on several others, including the X035. I haven't tested that functionality on the X033 yet (currently testing EEPROM emulation). However, that PR only affects Serial1.

[vuhazu]

Interesting!

In the past days I've been testing my CH32X033F8P6 chips. I made a new variant within the CH32X035 board to improve use of digitalWrite, analogWrite and analogRead. (intend to make that a PR sometime soon).

I tested Serial only on pins PA2/PA3 by setting PIN_SERIAL_RX and PIN_SERIAL_TX near line 113 in the file variant_CH32X033F8P6 .h, deep down the /variants folder. A few lines higher there is a definition for SERIAL_UART_INSTANCE. It is set to 1. I have not dived into that yet, but maybe that definition affects the available serial ports or perhaps only the active port. I've seen that the V203 QT PY sets SERIAL_UART_INSTANCE to 2...

BTW. My PR #145 for interrupt driven Serial1 (with available() peek() and improved read()) was developed for the V003, but other people confirmed it working on several others, including the X035. I haven't tested that functionality on the X033 yet (currently testing EEPROM emulation). However, that PR only affects Serial1.

i modified the CH32x035 file to use for CH32x033
can you share the variant file for CH32x033F8P6?

[maxint-rd]

i modified the CH32x035 file to use for CH32x033 can you share the variant file for CH32x033F8P6?

Yes I will. Let me do some cleanup and then I'll submit a PR that you can test. I modified multiple files, also to have logical numeric pin numbering and have working PWM and ADC on most pins. (I shall post a link here when ready)

[maxint-rd]

FYI I've uploaded a first version of my CH32X033F8P6 variant files in this branch. It may need some more cleanup here and there...

[vuhazu]

FYI I've uploaded a first version of my CH32X033F8P6 variant files in this branch. It may need some more cleanup here and there...

yes i will try it and will let you know.

[maxint-rd]

Okay. Next to the variant files I changed boards.txt and added a chip specific readme. Have fun!

(As soon as I find some more time, I want to test out the serial stuff this issue actually is about...)