rt-thread/bsp/ESP32_C3

ESP32-C3 BSP Introduction

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This document records the execution instruction of the BSP (board support package) for the ESP32-C3 development board.

The document is covered in two parts:

• Board Resources Introduction
• Quickly Get Started

Resources Introduction

We tested 2 development boards, it all works, but due to the different LED pins of the two development boards, so we'll need to select the corresponding development board in the menuconfig.

• LUATOS_ESP32C3

• HX-DK-商

The mainly-used resources of LUATOS_ESP32C3 are shown as follows:

• MCU: esp32-c3，Main Frequency 160MHz, 407.22 CoreMark; 2.55 CoreMark/MHz
• Built-in Chip: 384KB ROM, 400KB SRAM
• Peripherals
  • Red LED: 2, LED: D4 (IO12), D5（IO13）
  • Button: 2, K1（BOOT） K2(RST)
  • SPI FLASH: 4M
• Common-used interfaces: USB, UART, etc.

For more details about this board, please refer to Here.

Peripheral Condition

Each peripheral supporting condition for this BSP is as follows:

On-board Peripherals	Support	Remark
GPIO	Support
UART	Support	Using LUATOS_ESP32C3 development board requires connecting serial port to USB chip UART0_TX and UART0_RX (such as CP2102)
JTAG debug	Support	ESP32C3 usb-linked development boards can be debugged

Environment construction and compilation

1. Download the RISC-V toolchain:

   wget https://github.com/espressif/crosstool-NG/releases/download/esp-2022r1-RC1/riscv32-esp-elf-gcc11_2_0-esp-2022r1-RC1-linux-amd64.tar.xz
   tar xf riscv32-esp-elf-gcc11_2_0-esp-2022r1-RC1-linux-amd64.tar.xz
   

2. Configure the path of the toolchain:

   Add the local path of the RISC-V toolchain to the EXEC_PATH variable in the rtconfig.py file, or specify the path by setting the RTT_EXEC_PATH environment variable, for example:

   export RTT_EXEC_PATH=/opt/riscv32-esp-elf/bin
   

3. Compile

   Install esptool to convert ELF files to binary flash files:

   pip install esptool
   

   Execute the following command on the Linux platform to configure:

   scons --menuconfig
   

   It will automatically download env-related scripts to the ~/.env directory, and then execute:

   source ~/.env/env.sh
   
   cd bsp/ESP32_C3/
   pkgs --update
   

   It will automatically download RT-Thread-packages/esp-idf and RT-Thread-packages/FreeRTOS-Wrapper, after updating the software packages, execute scons to compile the board support package.

   If the compilation is successful, rtthread.elf, rtthread.bin files will be generated.

Download and program

1. Programming tool download

   The current bsp test uses the flash_download_tool_3.9.4 tool to program without errors.

   Programming tool download address: https://www.espressif.com.cn/sites/default/files/tools/flash_download_tool_3.9.4_0.zip

2. Programming tool configuration

   Chip model selection ESP32-C3

   Configure the binary file and offset address as follows:

   binary file	offset address
   bootloader.bin	0x0
   partition-table.bin	0x8000
   rtthread.bin	0x10000

   Among them, bootloader.bin and partition-table.bin can be found in the bsp/ESP32_C3/builtin_imgs folder. After the configuration is completed, the screenshot is as follows, and then click START to download.

   

Notes

• The basic functions are now supported, but it needs more, welcome any contributions and feedback.

Maintainer:

• supperthomas email address: 78900636@qq.com
• tangzz98 email address: tangz98@outlook.com

Special thanks to chenyingchun0312 for providing support on the RISC-V part working.