172 lines
7.5 KiB
Markdown
172 lines
7.5 KiB
Markdown
# ESP32-C3 BSP Introduction
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[中文](README_ZH.md) | English
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This document records the execution instruction of the BSP (board support package) for the [ESP32-C3](http://luatos.com/t/esp32c3) development board.
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The document is covered in two parts:
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- Board Resources Introduction
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- Quickly Get Started
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## Resources Introduction
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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.
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- [LUATOS_ESP32C3](https://wiki.luatos.com/chips/esp32c3/board.html)
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- [HX-DK-商](https://docs.wireless-tech.cn/doc/7/)
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The mainly-used resources of LUATOS_ESP32C3 are shown as follows:
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- MCU: [esp32-c3](https://www.espressif.com/sites/default/files/documentation/esp32-c3_datasheet_en.pdf)，Main Frequency 160MHz, 407.22 CoreMark; 2.55 CoreMark/MHz
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- Built-in Chip: 384KB ROM, 400KB SRAM
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- Peripherals
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- Red LED: 2, LED: D4 (IO12), D5（IO13）
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- Button: 2, K1（BOOT） K2(RST)
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- SPI FLASH: 4M
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- Common-used interfaces: USB, UART, etc.
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### For more details about this board, please refer to [Here](https://wiki.luatos.com/chips/esp32c3/board.html).
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## **Peripheral Condition**
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Each peripheral supporting condition for this BSP is as follows:
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| **On-board Peripherals** | ****Support**** | ****Remark**** |
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| ------------------------ | --------------- | ------------------------------------------------------------ |
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| GPIO | Support | |
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| UART | Support | Using LUATOS_ESP32C3 development board requires connecting serial port to USB chip UART0_TX and UART0_RX (such as CP2102) |
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| JTAG debug | Support | ESP32C3 usb-linked development boards can be debugged |
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| WIFI | Partial support | There are currently some problems, such as `rt_mq_recive` cannot be used in ISR, etc., and we are still trying to solve it |
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| BLE | Partially supported | There are currently some problems, such as running errors caused by the same `PC` and `SP` pointers after `NimBLE` is started for a period of time |
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| GDBStub | Support | You can use the GDB provided by ESP-IDF by turning on the `BSP_ENABLE_GDBSTUB` switch, which will enter GDB mode after a chip error |
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Note:
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1. WIFI and BLE cannot be enabled at the same time. When using the BLE driver, be sure to turn off the `RT_USING_WIFI` and `LWIP` switches in `menuconfig`. In addition, due to limited personal abilities and lack of debugging equipment, there are problems with the operation of WIFI and BLE drivers. If you can solve it, please contact me [timwcx@qq.com](mailto:timwcx@qq.com), I will be grateful.
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2. The BLE driver only supports `NimBLE` and is provided by the `bluetooth` component in `esp-idf`. To use the BLE driver, please refer to `bsp/ESP32_C3/packages/ESP-IDF-latest/examples/bluetooth/nimble` Sample program, please note that the `esp_timer_init()` function must be called to initialize the clock driver before calling the `NimBLE` related interface.
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One way to run the BLE sample is to add the sample program to `scons` compilation and call the clock initialization program and sample program entry in `bsp/ESP32_C3/main/main.c`.
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```c
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int main(void) {
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...
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#ifdef BSP_USING_BLE
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esp_timer_init(); //Call clock initialization program
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app_main(); //Call the BLE sample program entry
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#endif
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...
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}
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```
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3、 Regarding the use of the GDBStub component, please see [ESP-IDF official documentation on GDBStub](https://docs.espressif.com/projects/esp-idf/zh_CN/latest/esp32c3/api-guides/tools/idf- monitor.html?#gdbstub-gdb), currently I have provided a debugging script `esp32c3.gdb`, the specific usage method is as follows.
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```sh
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wcx@tim ~/rt-thread/bsp/ESP32_C3 esp32 ± sudo riscv32-esp-elf-gdb # Enter gdb debugging
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GNU gdb (crosstool-NG esp-2022r1-RC1) 9.2.90.20200913-git
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Copyright (C) 2020 Free Software Foundation, Inc.
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License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
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This is free software: you are free to change and redistribute it.
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There is NO WARRANTY, to the extent permitted by law.
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Type "show copying" and "show warranty" for details.
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This GDB was configured as "--host=x86_64-build_pc-linux-gnu --target=riscv32-esp-elf".
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Type "show configuration" for configuration details.
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For bug reporting instructions, please see:
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<http://www.gnu.org/software/gdb/bugs/>.
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Find the GDB manual and other documentation resources online at:
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<http://www.gnu.org/software/gdb/documentation/>.
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For help, type "help".
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Type "apropos word" to search for commands related to "word".
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(gdb) source esp32c3.gpb # Load gdb script
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0x3fca8c30 in __stack_start__ ()
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(gdb)
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```
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## Environment construction and compilation
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1. Download the RISC-V toolchain:
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```sh
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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
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tar xf riscv32-esp-elf-gcc11_2_0-esp-2022r1-RC1-linux-amd64.tar.xz
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```
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2. Configure the path of the toolchain:
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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:
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```sh
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export RTT_EXEC_PATH=/opt/riscv32-esp-elf/bin
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```
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3. Compile
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Install esptool to convert ELF files to binary flash files:
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```sh
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pip install esptool
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```
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Execute the following command on the Linux platform to configure:
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```
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scons --menuconfig
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```
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It will automatically download env-related scripts to the `~/.env` directory, and then execute:
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```sh
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source ~/.env/env.sh
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cd bsp/ESP32_C3/
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pkgs --update
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```
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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.
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If the compilation is successful, `rtthread.elf`, `rtthread.bin` files will be generated.
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## Download and program
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1. Programming tool download
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The current bsp test uses the `flash_download_tool_3.9.4` tool to program without errors.
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Programming tool download address: [https://www.espressif.com.cn/sites/default/files/tools/flash_download_tool_3.9.4_0.zip](https://www.espressif.com.cn/sites/default/files/tools/flash_download_tool_3.9.4_0.zip)
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2. Programming tool configuration
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Chip model selection `ESP32-C3`
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Configure the binary file and offset address as follows:
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| binary file | offset address |
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| ------------------- | -------- |
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| bootloader.bin | 0x0 |
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| partition-table.bin | 0x8000 |
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| rtthread.bin | 0x10000 |
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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.
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## Notes
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- The basic functions are now supported, but it needs more, welcome any contributions and feedback.
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Maintainer:
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- [supperthomas](https://github.com/supperthomas) email address: [78900636@qq.com](mailto:78900636@qq.com)
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- [tangzz98](https://github.com/tangzz98) email address: [tangz98@outlook.com](tangz98@outlook.com)
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Special thanks to [chenyingchun0312](https://github.com/chenyingchun0312) for providing support on the RISC-V part working.
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