Zephyr MilkV Duo256M Test Report

Test Environment

Operating System Information

Source Code Link: https://github.com/zephyrproject-rtos/zephyr/tree/main
Reference Installation Document:
- https://docs.zephyrproject.org/latest/develop/getting_started/index.html
- https://github.com/milkv-duo/duo-buildroot-sdk

Hardware Information

MilkV Duo256M
USB to UART Debugger
SD Card

Installation Steps

Create and Compile BuildRoot

Obtain the source code according to the official tutorial:

git clone https://github.com/milkv-duo/duo-buildroot-sdk.git --depth=1

Modify build/boards/cv181x/cv1812cp_milkv_duo256m_sd/u-boot/cvi_board_init.c to remove pre-mapped pins:

diff --git a/build/boards/cv181x/cv1812cp_milkv_duo256m_sd/u-boot/cvi_board_init.c b/build/boards/cv181x/cv1812cp_milkv_duo256m_sd/u-boot/cvi_board_init.c
index c9c722236..c388ec0ee 100644
--- a/build/boards/cv181x/cv1812cp_milkv_duo256m_sd/u-boot/cvi_board_init.c
+++ b/build/boards/cv181x/cv1812cp_milkv_duo256m_sd/u-boot/cvi_board_init.c
@@ -1,46 +1,14 @@
 int cvi_board_init(void)
 {
-       // Camera
-       PINMUX_CONFIG(PAD_MIPI_TXM1, IIC2_SDA);    // GP10
-       PINMUX_CONFIG(PAD_MIPI_TXP1, IIC2_SCL);    // GP11
-       PINMUX_CONFIG(PAD_MIPI_TXP0, CAM_MCLK0);   // Sensor MCLK
-       PINMUX_CONFIG(PAD_MIPI_TXP2, XGPIOC_17);   // Sensor RESET
 
        // UART1
        PINMUX_CONFIG(IIC0_SCL, UART1_TX);         // GP0
        PINMUX_CONFIG(IIC0_SDA, UART1_RX);         // GP1
 
-       // PWM
-       PINMUX_CONFIG(JTAG_CPU_TMS, PWM_7);        // GP2
-       PINMUX_CONFIG(JTAG_CPU_TCK, PWM_6);        // GP3
 
-       // I2C1
-       PINMUX_CONFIG(SD1_D2, IIC1_SCL);           // GP4
-       PINMUX_CONFIG(SD1_D1, IIC1_SDA);           // GP5
 
-       // SPI2
-       PINMUX_CONFIG(SD1_CLK, SPI2_SCK);          // GP6
-       PINMUX_CONFIG(SD1_CMD, SPI2_SDO);          // GP7
-       PINMUX_CONFIG(SD1_D0, SPI2_SDI);           // GP8
-       PINMUX_CONFIG(SD1_D3, SPI2_CS_X);          // GP9
 
-       // All default GPIOs
-       PINMUX_CONFIG(SD0_PWR_EN, XGPIOA_14);      // GP14
-       PINMUX_CONFIG(SPK_EN, XGPIOA_15);          // GP15
-       PINMUX_CONFIG(EMMC_CMD, XGPIOA_23);        // GP16
-       PINMUX_CONFIG(EMMC_DAT1, XGPIOA_24);       // GP17
-       PINMUX_CONFIG(EMMC_CLK, XGPIOA_22);        // GP18
-       PINMUX_CONFIG(EMMC_DAT0, XGPIOA_25);       // GP19
-       PINMUX_CONFIG(EMMC_DAT3, XGPIOA_27);       // GP20
-       PINMUX_CONFIG(EMMC_DAT2, XGPIOA_26);       // GP21
-       PINMUX_CONFIG(PWR_SEQ2, PWR_GPIO_4);       // GP22
 
-       // LED
-       PINMUX_CONFIG(PWR_GPIO2, PWR_GPIO_2);      // GP25
-
-       // ADC pins set to GPIO
-       PINMUX_CONFIG(ADC1, XGPIOB_3);             // GP26 (ADC1)
-       PINMUX_CONFIG(USB_VBUS_DET, XGPIOB_6);     // GP27 (ADC2)
 
        return 0;
-}
\ No newline at end of file
+}

Then compile using Docker:

cd duo-buildroot-sdk
docker exec -it duodocker /bin/bash -c "cd /home/work && cat /etc/issue && ./build.sh milkv-duo256m"

Next, flash the source code to the SD card:

sudo dd if=out/milkv-duo-yyyymmdd-hhmm.img of=/dev/your/device bs=1M status=progress

Install Zephyr

Create a virtual environment:

python3 -m venv ~/zephyrproject/.venv
source ~/zephyrproject/.venv/bin/activate
pip install westcv180x/cv1800b_milkv_duo_sd

Note: Since the changes are not yet merged into the mainline, use the specific repository when fetching Zephyr:

west init ~/zephyrproject -m https://github.com/plctlab/rvspoc-p2307-zephyr.git
cd ~/zephyrproject
west update

Configure the environment:

west zephyr-export
pip install -r ~/zephyrproject/zephyr/scripts/requirements.txt

Code Compliation

Compile the code using west:

west build -p always -b milkv_duo256m samples/hello_world

Merge fip.bin

Mount the SD card with the BuildRoot image flashed and merge fip:

sudo ./fsbl/plat/cv181x/fiptool.py -v genfip \
 './fsbl/build/cv1812cp_milkv_duo256m_sd/fip.bin' \
  --BLCP_2ND_RUNADDR="0x000000008fe00000" \
  --MONITOR_RUNADDR="0x0000000080000000" \
  --CHIP_CONF='./fsbl/build/cv1812cp_milkv_duo256m_sd/chip_conf.bin' \
  --NOR_INFO='FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF' \
  --NAND_INFO='00000000'\
  --BL2='./fsbl/build/cv1812cp_milkv_duo256m_sd/bl2.bin' \
  --BLCP_IMG_RUNADDR=0x05200200 \
  --BLCP_PARAM_LOADADDR=0 \
  --BLCP='./fsbl/test/empty.bin' \
  --DDR_PARAM='./fsbl/test/cv181x/ddr_param.bin' \
  --BLCP_2ND='~/zephyrproject/zephyr/build/zephyr/zephyr.bin' \
  --MONITOR='./opensbi/build/platform/generic/firmware/fw_dynamic.bin' \
  --LOADER_2ND='./u-boot-2021.10/build/cv1812cp_milkv_duo256m_sd/u-boot-raw.bin' \
  --compress='lzma'

Copy it to the SD card:

sudo cp ./fsbl/build/cv1812cp_milkv_duo256m_sd/fip.bin /path/to/sdcard

Connecting the serial port

The small core running Zephyr is using UART1 (GP1: TX, GP2: RX, GP3: GND)

Expected Results

The system boots up normally and allows login through the serial port.

Actual Results

The system boots up normally and login through the serial port is successful.

Boot Information

Screencast (from compilation to boot):

Hello World! milkv_duo256m/sg2002
Hello World! milkv_duo256m/sg2002
Hello World! milkv_duo256m/sg2002
Hello World! milkv_duo256m/sg2002
Hello World! milkv_duo256m/sg2002
Hello World! milkv_duo256m/sg2002
Hello World! milkv_duo256m/sg2002
Hello World! milkv_duo256m/sg2002
Hello World! milkv_duo256m/sg2002
Hello World! milkv_duo256m/sg2002
Hello World! milkv_duo256m/sg2002
Hello World! milkv_duo256m/sg2002

Test Criteria

Successful: The actual result matches the expected result.

Failed: The actual result does not match the expected result.

Test Conclusion

Test successful.

System Version

Status

Last Update