BluePill Plus CH32V203
Overview
The WeActStudio [1] BluePill Plus CH32V203 hardware provides support for QingKe V4B 32-bit RISC-V processor and the following devices:
CLOCK
GPIO
NVIC
UART
The board is equipped with two LEDs and three Buttons. User can use one of the LEDs and one of the buttons. The WCH webpage on CH32V203 [2] contains the processor’s manuals. The WeActStudio webpage on BPP [3] contains the BluePill’s schematic.
Hardware
The QingKe V4B 32-bit RISC-V processor of the BluePill Plus CH32V203 is clocked by an external 8 MHz crystal or the internal 8 MHz oscillator and runs up to 144 MHz. The CH32V203 SoC Features 2-4 USART, 4 GPIO ports, 1-2 SPI, 0-2 I2C, 9-16 ADC, RTC, CAN, USB Device, USB Host, OPA, and several timers.
Supported Features
The bluepillplus_ch32v203 board supports the hardware features listed below.
- on-chip / on-board
- Feature integrated in the SoC / present on the board.
- 2 / 2
-
Number of instances that are enabled / disabled.
Click on the label to see the first instance of this feature in the board/SoC DTS files. -
vnd,foo -
Compatible string for the Devicetree binding matching the feature.
Click on the link to view the binding documentation.
Type |
Location |
Description |
Compatible |
|---|---|---|---|
CPU |
on-chip |
WCH QingKe V4B RISC-V MCU1 |
|
Clock control |
on-chip |
WCH CH32V00x Reset and Clock Control (RCC)1 |
|
on-chip |
WCH CH32V00x HSE Clock1 |
||
on-chip |
WCH CH32V00x HSI Clock1 |
||
on-chip |
Generic fixed-rate clock provider1 |
||
on-chip |
WCH CH32V20x/30x PLL1 |
||
GPIO & Headers |
on-chip |
WCH CH32V00x General-Purpose Input/Output (GPIO)4 |
|
Input |
on-board |
Group of GPIO-bound input keys1 |
|
Interrupt controller |
on-chip |
WCH CH32V00x Programmable Fast Interrupt Controller (PFIC)1 |
|
LED |
on-board |
Group of GPIO-controlled LEDs1 |
|
MTD |
on-chip |
Flash node1 |
|
Pin control |
on-chip |
WCH CH32V20x/30x AFIO1 |
|
Serial controller |
on-chip |
||
SPI |
on-chip |
WCH SPI2 |
|
SRAM |
on-chip |
Generic on-chip SRAM1 |
|
Timer |
on-chip |
WCH CH32V00x Systick1 |
Connections and IOs
LED
LED0 = Blue User LED
Programming and Debugging
Applications for the bluepillplus_ch32v203 board can be built and flashed
in the usual way (see Building an Application and Run an Application
for more details); however, an external programmer is required since the board
does not have any built-in debug support.
The following pins of the external programmer must be connected to the following pins on the PCB:
VCC = VCC
GND = GND
SWIO = PA13
SWCLK = PA14
Flashing
You can use minichlink to flash the board. Once minichlink has been set
up, build and flash applications as usual (see Building an Application and
Run an Application for more details).
Here is an example for the Blinky application.
# From the root of the zephyr repository
west build -b bluepillplus_ch32v203 samples/basic/blinky
west flash
Debugging
This board can be debugged via OpenOCD or minichlink.