UIAPduino Pro Micro CH32V003

Overview

The UIAPduino Pro Micro CH32V003 V1.4 [1] is an open-source hardware development board based on the WCH CH32V003 [2] microcontroller. The board uses a USB Type-C connector for power and programming, and can act as a USB 2.0 Low-Speed device for HID applications.

Zephyr support for this board currently provides basic GPIO support and the on-board user LED.

Hardware

The board uses the WCH CH32V003F4U6 SoC, which contains a QingKe V2A 32-bit RISC-V core. The SoC provides 16 KiB of flash and 2 KiB of SRAM, and supports operation up to 48 MHz.

Notable board hardware includes:

USB Type-C connector for power and programming
on-board reset button
on-board power and user LEDs
selectable 3.3 V or 5 V microcontroller supply
USB host protection fuses
through-hole edge connections
flat bottom for surface-mount-like installation

Supported Features

The uiapduino_pro_micro_ch32v003 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.

`uiapduino_pro_micro_ch32v003/ch32v003` target

On-target memory for this board target: 2 KiB of RAM, 16 KiB of Flash.

Type	Location	Description	Compatible
CPU	on-chip	WCH QingKe V2 RISC-V MCU1	`wch,qingke-v2`
ADC	on-chip	WCH CH32V00x ADC1	`wch,adc`
Clock control	on-chip	WCH CH32V00x Reset and Clock Control (RCC)1	`wch,rcc`
	on-chip	WCH CH32V00x HSE Clock1	`wch,ch32v00x-hse-clock`
	on-chip	WCH CH32V00x HSI Clock1	`wch,ch32v00x-hsi-clock`
	on-chip	Generic fixed-rate clock provider1	`fixed-clock`
	on-chip	WCH CH32V00x PLL1	`wch,ch32v00x-pll-clock`
Counter	on-chip	WCH Advanced-control Timer (ADTM) for PWM1	`wch,adtm`
Counter	on-chip	WCH General-purpose Timer (GPTM)1	`wch,gptm`
DMA	on-chip	WCH DMA controller1	`wch,wch-dma`
GPIO & Headers	on-chip	WCH CH32V00x General-Purpose Input/Output (GPIO)3	`wch,gpio`
I2C	on-chip	WCH I2C controller1	`wch,i2c`
Interrupt controller	on-chip	WCH CH32V00x Programmable Fast Interrupt Controller (PFIC)1	`wch,pfic`
Interrupt controller	on-chip	WCH CH32V003/20x/30x External Interrupt and Event Controller (EXTI)1	`wch,exti`
LED	on-board	Group of GPIO-controlled LEDs1	`gpio-leds`
MTD	on-chip	Flash node1	`soc-nv-flash`
Pin control	on-chip	WCH CH32V00x AFIO1	`wch,afio`
PWM	on-chip	WCH Advanced-control Timer (ADTM) for PWM1	`wch,adtm-pwm`
PWM	on-chip	WCH General-purpose Timer (GPTM) for PWM1	`wch,gptm-pwm`
Serial controller	on-chip	WCH SDI console1	`wch,sdi-console`
Serial controller	on-chip	WCH CH32V00x UART1	`wch,usart`
SPI	on-chip	WCH SPI1	`wch,spi`
SRAM	on-chip	Generic on-chip SRAM1	`mmio-sram`
Timer	on-chip	WCH CH32V00x Systick1	`wch,systick`
Watchdog	on-chip	WCH Independent Watchdog (IWDG)1	`wch,iwdg`

Connections and IOs

LED

LED0 = PC0, active high

Programming

The uiapduino_pro_micro_ch32v003 board supports the runners and associated west commands listed below.

	flash	debug
minichlink	✅ (default)

Applications for the uiapduino_pro_micro_ch32v003 board target can be built and flashed in the usual way. See Building an Application and Run an Application for more details.

The board is shipped with a custom USB bootloader based on rv003usb [3]. To enter writing standby mode, hold the reset button while connecting the board to USB, then release the reset button.

The Zephyr board configuration uses minichlink as the default runner and passes 0x1209b803 as the device identifier.

Flashing

Install minichlink from ch32fun [4] and make sure the board can be accessed by the host. On Linux, this may require installing the corresponding udev rule.

Here is an example for the Blinky application.

# From the root of the zephyr repository
west build -b uiapduino_pro_micro_ch32v003 samples/basic/blinky
west flash