131 lines
5.1 KiB
Markdown
131 lines
5.1 KiB
Markdown
[中文](README.md) | **English**
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## Overview
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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.
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1. Processor Core
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- Main processor: RISCV C906 @ 1.0Ghz
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- 32KB I-cache, 64KB D-Cache
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- Integrated vector and floating-point units (FPU).
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- Coprocessor: RISCV C906 @ 700Mhz
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- Integrated floating-point unit (FPU).
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2. Memory Interface
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- Built-in DRAM: DDR2 16bitx1, with a maximum speed of 1333Mbps, capacity of 512Mbit (64MB).
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- Support for SPI NOR flash interface (1.8V / 3.0V)
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- Support for 1, 2, 4-wire modes
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- Maximum support of 256MBytes
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- Support for SPI Nand flash interface (1.8V / 3.0V)
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- Support for 1KB/2KB/4KB page (corresponding to a maximum capacity of 16GB/32GB/64GB)
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- Use the built-in ECC module of the device itself
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3. Peripherals
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- 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.
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- Up to 3x I2C
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- Up to 5x UART
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- Up to 1x SDIO1
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- Up to 1x SPI
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- Up to 2x ADC
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- Up to 7x PWM
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- Up to 1x RUN
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- Up to 1x JTAG
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- Integrated MAC PHY supporting 10/100Mbps full-duplex or half-duplex mode
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- One USB Host / device interface
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## Toolchain Download
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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)
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> Note:
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The current BSP only supports Linux compilation.
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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.
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```shell
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$ export RTT_EXEC_PATH=/opt/riscv64-linux-musleabi_for_x86_64-pc-linux-gnu/bin
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```
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## Compilation
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1. Installing Dependencies
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```shell
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$ sudo apt install -y device-tree-compiler
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```
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On the Linux platform, you can execute:
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```shell
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$ scons --menuconfig
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```
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It will automatically download environment-related scripts to the ~/.env directory, and then execute
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```shell
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$ source ~/.env/env.sh
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$ pkgs --update
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```
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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.
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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.
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## Running
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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.
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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.
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Where:
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- fip.bin: the bin file after fsbl、opensbi and U-Boot are packaged
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- boot.sd: the bin file after the kernel is packaged
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After updating `boot.sd`, power on again and you will see the serial output information:
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```shell
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U-Boot 2021.10 (Jun 26 2023 - 14:09:06 +0800)cvitek_cv180x
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DRAM: 63.3 MiB
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gd->relocaddr=0x82435000. offset=0x2235000
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MMC: cv-sd@4310000: 0
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Loading Environment from <NULL>... OK
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In: serial
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Out: serial
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Err: serial
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Net:
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Warning: ethernet@4070000 (eth0) using random MAC address - 62:80:19:6c:d4:64
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eth0: ethernet@4070000
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Hit any key to stop autoboot: 0
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Boot from SD ...
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switch to partitions #0, OK
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mmc0 is current device
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132692 bytes read in 12 ms (10.5 MiB/s)
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## Loading kernel from FIT Image at 81400000 ...
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Using 'config-cv1800b_milkv_duo_sd' configuration
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Trying 'kernel-1' kernel subimage
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Verifying Hash Integrity ... crc32+ OK
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## Loading fdt from FIT Image at 81400000 ...
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Using 'config-cv1800b_milkv_duo_sd' configuration
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Trying 'fdt-cv1800b_milkv_duo_sd' fdt subimage
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Verifying Hash Integrity ... sha256+ OK
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Booting using the fdt blob at 0x8141b590
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Uncompressing Kernel Image
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Decompressing 296768 bytes used 42ms
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Loading Device Tree to 0000000081be5000, end 0000000081becb60 ... OK
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Starting kernel ...
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heap: [0x802766b0 - 0x812766b0]
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\ | /
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- RT - Thread Smart Operating System
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/ | \ 5.0.1 build Jun 28 2023 23:44:36
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2006 - 2022 Copyright by RT-Thread team
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Hello RT-Smart!
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msh />
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```
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## Driver Support List
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| Driver | Support Status | Remarks |
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| :----- | :------------- | :--------------------- |
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| UART | Supported | Default baud rate 115200 |
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## Supported Development Boards
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- milk-v duo: [https://milkv.io/duo](https://milkv.io/duo)
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## Contact information
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Maintenance person：[flyingcys](https://github.com/flyingcys)
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