For customers who want to port their own GMSL2 cameras on NRU-51V

One of the biggest benefits of NRU-51V+/NRU-51V is the pre-built camera driver for our selected cameras. We believe the turnkey GMSL2 solution is one of the most attractive features of NRU-51V+/ NRU-51V.

However, we believe that many of our skillful customers are very comfortable porting their own GMSL2 cameras.

The following is the technical information we can provide without an extra NDA or NRE fee:

• You have experience with reflashing NRU-51V with the device tree for your GMSL2 cameras.

• You are comfortable rebuilding the kernel to support your GMSL2 camera image format.

• You have already obtained the MAX20086 and MAX9296 register table from the local MAXIM distributor. (Due to the NDA between Neousys and MAXIM, we are not able to provide MAXIM technical documents to you.)

The hardware topology of MAX9296 and MIPI CSI is as follows: Each port has a 2-lane MIPI CSI bandwidth.

JP 5.x /JP6.x

### NRU-51V Typology ____________________________________________________________________
# 1GbE _ 10GbE _ BTB_B(GPIO441/PP.01) ____________ BTB_A(GPIO486/PAC.00)
#                └ MAX9296_B(0x48->0x4A)                 └ MAX9296_A(0x48->0x49)
#                └ Port#3         └ Port#2         └ Port#1         └ Port#0   
#                  serial_b         serial_a         serial_d         serial_c                  
#                  MAX9295_BB       MAX9295_BA       MAX9295_AB       MAX9295_AA
### _____________________________________________________________________________________

JP 4.x

### NRU-51V Typology ____________________________________________________________________
# 1GbE _ 10GbE _ BTB_B(GPIO409) __________________ BTB_A(GPIO413)
#                └ MAX9296_B(0x48->0x4A)             └ MAX9296_A(Def:0x48->0x49)
#                └ Port#3         └ Port#2         └ Port#1         └ Port#0   
#                  serial_b         serial_a         serial_d         serial_c                  
#                  MAX9295_BB       MAX9295_BA       MAX9295_AB       MAX9295_AA
### _____________________________________________________________________________________

• There are a few code examples to help you enable MAX9296 and reset MAX20086. After the following settings, you will find MAX9296 (0x48) and MAX20086 (0x28) on I2C Bus 2. Two MAX9296 have identical i2c addresses (0x48) by default.

JP 6.x

BTB_A_NAME=PP.01
BTB_B_NAME=PAC.00

function setGPO_JP6(){
# $1=gpo_id $2=gpo_value
    PIN=$1
    sudo pkill -f -- "$(sudo gpiofind $PIN)"
    sudo gpioset -m signal $(sudo gpiofind $PIN)=$2 &
}


function resetBTB {
    pinName=$1

    #setGPO_JP6 ${pinName} 0
    sudo ./GPIOControl.sh ${pinName} 0
    sleep 2
    #setGPO_JP6 ${pinName} 1
    sudo ./GPIOControl.sh ${pinName} 1
    sleep 2
}

function EnableBTB {
    pinName=$1

    setGPO_JP6 ${pinName} 1
    sleep 2 
}

function disableBTB {
    pinName=$1

    #setGPO_JP6 ${pinName} 0
    sudo ./GPIOControl.sh ${pinName} 0
    sleep 2 
}

function resetAll20086 {
    # reset power power off gmsl link 
    i2cset -f -y 2 0x28 0x01 0x10
    sleep 1
    # 20086 (BIT0 / BIT1)-->(PortA / Port B) -->POWER ON/OFF
    i2cset -f -y 2 0x28 0x01 0x1f
    sleep 1
}

resetBTB $BTB_A_NAME
resetBTB $BTB_B_NAME
resetAll20086  

JP 5.x

BTB_A_NUM=486
BTB_A_NAME=PAC.00
BTB_B_NUM=441
BTB_B_NAME=PP.01

MAX9296_PRIM=0x48
MAX9296_A=0x49
MAX9296_B=0x4A

function resetBTB {
    pinNum=$1
    pinName=$2
    echo ${pinNum} > /sys/class/gpio/export 2>/dev/null
    echo out > /sys/class/gpio/${pinName}/direction
    echo 0 > /sys/class/gpio/${pinName}/value
    sleep 2
    echo 1 > /sys/class/gpio/${pinName}/value
}

function disableBTB {
    pinNum=$1
    pinName=$2
    echo ${pinNum} > /sys/class/gpio/export 2>/dev/null
    echo out > /sys/class/gpio/${pinName}/direction
    echo 0 > /sys/class/gpio/${pinName}/value
    sleep 2 
}

function resetAll20086 {
    # reset power power off gmsl link 
    i2cset -f -y 2 0x28 0x01 0x10
    sleep 1
    # 20086 (BIT0 / BIT1)-->(PortA / Port B) -->POWER ON/OFF
    i2cset -f -y 2 0x28 0x01 0x1f
    sleep 1
}

resetBTB $BTB_A_NUM $BTB_A_NAME
resetBTB $BTB_B_NUM $BTB_B_NAME
resetAll20086 

JP 4.x

＃ Please run with sudo

function resetAll20086 {
    # reset power power off gmsl links 
    i2cset -f -y 2 0x28 0x01 0x10
    sleep 1
    i2cset -f -y 2 0x28 0x01 0x1f
    sleep 1
}

function resetBTB {
    pin=$1
    echo ${pin} > /sys/class/gpio/export 2>/dev/null
    echo out > /sys/class/gpio/gpio${pin}/direction
    echo 0 > /sys/class/gpio/gpio${pin}/value
    sleep 1
    echo 1 > /sys/class/gpio/gpio${pin}/value
}

sudo -s

BTB_A=413
BTB_B=409

resetBTB $BTB_A
resetBTB $BTB_B
resetAll20086 

• The hardware framesync from NRU-50 is MAX9296 MFP1 You may further change the Framesysnc FPS by this link [link]

To sum up, if you have 100% understood the potential technical effort of porting GMSL2 cameras, please feel free to order NRU-51V without our selected GMSL2 cameras