rt-thread/bsp/cvitek/cv1800b/README_en.md

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2023-06-30 00:05:55 +08:00
[中文](README.md) | **English**
## Overview
CV180ZB/CV1800B/CV1801B are high-performance, low-power chips designed for consumer surveillance IP cameras, smart home devices, and other product areas. They integrate H.264/H.265 video compression encoders and ISPs, and support various image enhancement and correction algorithms such as digital wide dynamic range, 3D noise reduction, defogging, and lens distortion correction, providing professional-grade video image quality to customers.
1. Processor Core
- Main processor: RISCV C906 @ 1.0Ghz
- 32KB I-cache, 64KB D-Cache
- Integrated vector and floating-point units (FPU).
- Coprocessor: RISCV C906 @ 700Mhz
- Integrated floating-point unit (FPU).
2. Memory Interface
- Built-in DRAM: DDR2 16bitx1, with a maximum speed of 1333Mbps, capacity of 512Mbit (64MB).
- Support for SPI NOR flash interface (1.8V / 3.0V)
- Support for 1, 2, 4-wire modes
- Maximum support of 256MBytes
- Support for SPI Nand flash interface (1.8V / 3.0V)
- Support for 1KB/2KB/4KB page (corresponding to a maximum capacity of 16GB/32GB/64GB)
- Use the built-in ECC module of the device itself
3. Peripherals
- Up to 26 GPIO pins on the MilkV-Duo 40-pin header provide access to internal peripherals such as SDIO, I2C, PWM, SPI, J-TAG, and UART.
- Up to 3x I2C
- Up to 5x UART
- Up to 1x SDIO1
- Up to 1x SPI
- Up to 2x ADC
- Up to 7x PWM
- Up to 1x RUN
- Up to 1x JTAG
- Integrated MAC PHY supporting 10/100Mbps full-duplex or half-duplex mode
- One USB Host / device interface
## Toolchain Download
Download the `riscv64-unknown-linux-musl-gcc` toolchain from: [https://github.com/RT-Thread/toolchains-ci/releases/download/v1.7/riscv64-linux-musleabi_for_x86_64-pc-linux-gnu_latest.tar.bz2](https://github.com/RT-Thread/toolchains-ci/releases/download/v1.7/riscv64-linux-musleabi_for_x86_64-pc-linux-gnu_latest.tar.bz2)
> Note:
The current BSP only supports Linux compilation.
After correct extraction, add the local path of the `riscv64-unknown-linux-musl-gcc` toolchain to `EXEC_PATH` in `rtconfig.py`, or specify the path through the `RTT_EXEC_PATH` environment variable.
```shell
$ export RTT_EXEC_PATH=/opt/riscv64-linux-musleabi_for_x86_64-pc-linux-gnu/bin
```
## Compilation
1. Installing Dependencies
```shell
$ sudo apt install -y device-tree-compiler
```
On the Linux platform, you can execute:
```shell
$ scons --menuconfig
```
It will automatically download environment-related scripts to the ~/.env directory, and then execute
```shell
$ source ~/.env/env.sh
$ pkgs --update
```
After updating the software packages, use `scons -j10` or `scons -j10 --verbose` to compile this board support package. Alternatively, you can use the command `scons --exec-path="GCC_toolchain_path"` to specify the toolchain location for compilation. If the compilation is successful, an rtthread.elf file will be generated.
After the compilation is completed, the script automatically calls the `./mksdimg.sh` script to package and generate the `boot.sd` file, which is the kernel file for SD card boot.
## Running
1. Divide the SD card into 2 partitions, with the first partition used to store bin files and the second partition used as a data storage partition. The partition format is FAT32.
2. Copy the `fip.bin` and `boot.sd` files from the root directory to the first partition of the SD card. For subsequent firmware updates, you only need to copy the `boot.sd` file.
Where:
- fip.bin: the bin file after fsbl、opensbi and U-Boot are packaged
- boot.sd: the bin file after the kernel is packaged
After updating `boot.sd`, power on again and you will see the serial output information:
```shell
U-Boot 2021.10 (Jun 26 2023 - 14:09:06 +0800)cvitek_cv180x
DRAM: 63.3 MiB
gd->relocaddr=0x82435000. offset=0x2235000
MMC: cv-sd@4310000: 0
Loading Environment from <NULL>... OK
In: serial
Out: serial
Err: serial
Net:
Warning: ethernet@4070000 (eth0) using random MAC address - 62:80:19:6c:d4:64
eth0: ethernet@4070000
Hit any key to stop autoboot: 0
Boot from SD ...
switch to partitions #0, OK
mmc0 is current device
132692 bytes read in 12 ms (10.5 MiB/s)
## Loading kernel from FIT Image at 81400000 ...
Using 'config-cv1800b_milkv_duo_sd' configuration
Trying 'kernel-1' kernel subimage
Verifying Hash Integrity ... crc32+ OK
## Loading fdt from FIT Image at 81400000 ...
Using 'config-cv1800b_milkv_duo_sd' configuration
Trying 'fdt-cv1800b_milkv_duo_sd' fdt subimage
Verifying Hash Integrity ... sha256+ OK
Booting using the fdt blob at 0x8141b590
Uncompressing Kernel Image
Decompressing 296768 bytes used 42ms
Loading Device Tree to 0000000081be5000, end 0000000081becb60 ... OK
Starting kernel ...
heap: [0x802766b0 - 0x812766b0]
\ | /
- RT - Thread Smart Operating System
/ | \ 5.0.1 build Jun 28 2023 23:44:36
2006 - 2022 Copyright by RT-Thread team
Hello RT-Smart!
msh />
```
## Driver Support List
| Driver | Support Status | Remarks |
| :----- | :------------- | :--------------------- |
| UART | Supported | Default baud rate 115200 |
## Supported Development Boards
- milk-v duo: [https://milkv.io/duo](https://milkv.io/duo)
## Contact information
Maintenance person[flyingcys](https://github.com/flyingcys)