Can't use CAM0_PWDN on Jetson Orin Nano DevKIt over script

musazenbilci · March 8, 2024, 9:17am

I have a MIPI CSI camera connected to the CSI0 J20 connector. The camera has a trigger feature and its trigger_to_sensor port is connected to the CAM0_PWDN port on Jetson Orin Nano DevKit. From the document
< Jetson_Orin_Nano_DevKit_Carrier_Board_Specification_SP-11324-001_v1.1.pdf>, CAM0_PWND is pin 114 on J20 connector. I tried to test it over the GPIO library with a script but it says Channel 114 is not valid. Here is the script:

import Jetson.GPIO as GPIO
import time

CAM0_PWDN_PIN = '114'

# Pin Setup:
# Board pin-numbering scheme
GPIO.setmode(GPIO.BOARD)
# Set pin as an output pin with optional initial state of HIGH
GPIO.setup(CAM0_PWDN_PIN, GPIO.OUT, initial=GPIO.HIGH)

try:
    print("Toggling CAM0_PWDN pin")
    while True:
        # Turn the camera power down off (enable the camera)
        GPIO.output(CAM0_PWDN_PIN, GPIO.HIGH)
        print("Camera enabled")
        time.sleep(2)
        
        # Turn the camera power down on (disable the camera)
        GPIO.output(CAM0_PWDN_PIN, GPIO.LOW)
        print("Camera disabled")
        time.sleep(2)

finally:
    GPIO.cleanup()  # Clean up GPIOs for the next run

I installed their driver with the attached dtsi file.
new_orinnano.dtsi (2).txt (24.0 KB)

How can I use the pins on the J20 connector or J21 for triggering?

I also played with jetson-io but it did not work out so far.

Platform: Jetpack 5.1.2 with Jetson Linux 35.4.1 on Jetson Orin Nano Developer Kit

Camera: MIPI CSI IMX568c camera module from Vision Components

Camera Repo: Vision Components MIPI® Camera Modules · GitHub

ShaneCCC · March 11, 2024, 8:51am

How do you figure out the 114?

Suppose it should be gpio-394

musazenbilci · March 11, 2024, 9:01am

From the page 23 of this file, Jetson Download Center | NVIDIA Developer

Also, I tried pin 394 with the mode GPIO.BCM and GPIO.BOARD but it still says invalid channel.

ShaneCCC · March 11, 2024, 9:05am

It’s HW pin #
It should be the GPIO PH.06 should be 397 of it.

gpio-397 (PH.06

musazenbilci · March 11, 2024, 9:11am

Yeah, I did find the GPIO PH.06 but not sure where 397 comes from. Is that a kind of calculation?

Also, I tried 397 with the following script but still returns invalid.

import Jetson.GPIO as GPIO
import time

CAM0_PWDN_PIN = '397'

# Pin Setup:
# Board pin-numbering scheme
GPIO.setmode(GPIO.BCM)
# Set pin as an output pin with optional initial state of HIGH
GPIO.setup(CAM0_PWDN_PIN, GPIO.OUT, initial=GPIO.HIGH)

try:
    print("Toggling CAM0_PWDN pin")
    while True:
        # Turn the camera power down off (enable the camera)
        GPIO.output(CAM0_PWDN_PIN, GPIO.HIGH)
        print("Camera enabled")
        time.sleep(2)

        # Turn the camera power down on (disable the camera)
        GPIO.output(CAM0_PWDN_PIN, GPIO.LOW)
        print("Camera disabled")
        time.sleep(2)

finally:
    GPIO.cleanup()  # Clean up GPIOs for next run

Is there any other way I can try the pin?

ShaneCCC · March 11, 2024, 9:20am

Check the number by below command.

sudo cat /sys/kernel/debug/gpio

musazenbilci · March 11, 2024, 9:53am

From the command, I can see that

 gpio-397 (PH.06               |camera-control-outpu) out lo

when I tried to test it via script or gpioset gpiochip0 397=1 command but it said invalid.

Then I run gpioinfo

gpiochip0 - 164 lines:
	line   0:      "PA.00" "fixed-regulators:regulator@8" output active-high [used]
	line   1:      "PA.01"       unused   input  active-high 
	line   2:      "PA.02"       unused   input  active-high 
	line   3:      "PA.03"       unused   input  active-high 
	line   4:      "PA.04"       unused   input  active-high 
	line   5:      "PA.05"       unused   input  active-high 
	line   6:      "PA.06"       unused   input  active-high 
	line   7:      "PA.07"       unused   input  active-high 
	line   8:      "PB.00"       unused   input  active-high 
	line   9:      "PC.00"       unused   input  active-high 
	line  10:      "PC.01"       unused   input  active-high 
	line  11:      "PC.02"       unused   input  active-high 
	line  12:      "PC.03"       unused   input  active-high 
	line  13:      "PC.04"       unused   input  active-high 
	line  14:      "PC.05"       unused   input  active-high 
	line  15:      "PC.06"       unused   input  active-high 
	line  16:      "PC.07"       unused   input  active-high 
	line  17:      "PD.00"       unused   input  active-high 
	line  18:      "PD.01"       unused   input  active-high 
	line  19:      "PD.02"       unused   input  active-high 
	line  20:      "PD.03"       unused   input  active-high 
	line  21:      "PE.00"       unused   input  active-high 
	line  22:      "PE.01"       unused   input  active-high 
	line  23:      "PE.02"       unused   input  active-high 
	line  24:      "PE.03"       unused   input  active-high 
	line  25:      "PE.04"       unused   input  active-high 
	line  26:      "PE.05"       unused   input  active-high 
	line  27:      "PE.06"       unused   input  active-high 
	line  28:      "PE.07"       unused   input  active-high 
	line  29:      "PF.00"       unused   input  active-high 
	line  30:      "PF.01"       unused   input  active-high 
	line  31:      "PF.02"       unused   input  active-high 
	line  32:      "PF.03"       unused   input  active-high 
	line  33:      "PF.04"       unused   input  active-high 
	line  34:      "PF.05"       unused   input  active-high 
	line  35:      "PG.00" "force-recovery" input active-low [used]
	line  36:      "PG.01"       unused   input  active-high 
	line  37:      "PG.02"       unused   input  active-high 
	line  38:      "PG.03"       unused   input  active-high 
	line  39:      "PG.04"       unused   input  active-high 
	line  40:      "PG.05"       unused   input  active-high 
	line  41:      "PG.06"       unused   input  active-high 
	line  42:      "PG.07"         "cd"   input  active-high [used]
	line  43:      "PH.00"       unused   input  active-high 
	line  44:      "PH.01"       unused   input  active-high 
	line  45:      "PH.02"       unused   input  active-high 
	line  46:      "PH.03"       unused   input  active-high 
	line  47:      "PH.04"       unused   input  active-high 
	line  48:      "PH.05"       unused   input  active-high 
	line  49:      "PH.06" "camera-control-output-low" output active-high [used]
	line  50:      "PH.07"       unused   input  active-high 
	line  51:      "PI.00"       unused   input  active-high 
	line  52:      "PI.01"       unused   input  active-high 
	line  53:      "PI.02"       unused   input  active-high 
	line  54:      "PI.03"       unused   input  active-high 
	line  55:      "PI.04"       unused   input  active-high 
	line  56:      "PI.05"       unused   input  active-high 
	line  57:      "PI.06"       unused   input  active-high 
	line  58:      "PJ.00"       unused   input  active-high 
	line  59:      "PJ.01"       unused   input  active-high 
	line  60:      "PJ.02"       unused   input  active-high 
	line  61:      "PJ.03"       unused   input  active-high 
	line  62:      "PJ.04"       unused   input  active-high 
	line  63:      "PJ.05"       unused   input  active-high 
	line  64:      "PK.00"       unused   input  active-high 
	line  65:      "PK.01"       unused   input  active-high 
	line  66:      "PK.02"       unused   input  active-high 
	line  67:      "PK.03"       unused   input  active-high 
	line  68:      "PK.04"       unused  output  active-high 
	line  69:      "PK.05"       unused  output  active-high 
	line  70:      "PK.06"       unused   input  active-high 
	line  71:      "PK.07"       unused   input  active-high 
	line  72:      "PL.00"       unused   input  active-high 
	line  73:      "PL.01"       unused   input  active-high 
	line  74:      "PL.02" "nvidia,pex-wake" input active-low [used]
	line  75:      "PL.03"       unused   input  active-high 
	line  76:      "PM.00"       unused   input  active-high 
	line  77:      "PM.01"       unused   input  active-high 
	line  78:      "PM.02"       unused   input  active-high 
	line  79:      "PM.03"       unused   input  active-high 
	line  80:      "PM.04"       unused   input  active-high 
	line  81:      "PM.05"       unused   input  active-high 
	line  82:      "PM.06"       unused   input  active-high 
	line  83:      "PM.07"       unused   input  active-high 
	line  84:      "PN.00"       unused   input  active-high 
	line  85:      "PN.01"       unused   input  active-high 
	line  86:      "PN.02"       unused   input  active-high 
	line  87:      "PN.03"       unused   input  active-high 
	line  88:      "PN.04"       unused   input  active-high 
	line  89:      "PN.05"       unused   input  active-high 
	line  90:      "PN.06"       unused   input  active-high 
	line  91:      "PN.07"       unused   input  active-high 
	line  92:      "PP.00"       unused   input  active-high 
	line  93:      "PP.01"       unused   input  active-high 
	line  94:      "PP.02"       unused   input  active-high 
	line  95:      "PP.03"       unused   input  active-high 
	line  96:      "PP.04"       unused   input  active-high 
	line  97:      "PP.05"       unused   input  active-high 
	line  98:      "PP.06"       unused   input  active-high 
	line  99:      "PP.07"       unused   input  active-high 
	line 100:      "PQ.00"       unused   input  active-high 
	line 101:      "PQ.01"       unused   input  active-high 
	line 102:      "PQ.02"       unused   input  active-high 
	line 103:      "PQ.03"       unused  output  active-high 
	line 104:      "PQ.04"       unused   input  active-high 
	line 105:      "PQ.05"       unused   input  active-high 
	line 106:      "PQ.06"       unused   input  active-high 
	line 107:      "PQ.07"       unused   input  active-high 
	line 108:      "PR.00"       unused   input  active-high 
	line 109:      "PR.01"       unused   input  active-high 
	line 110:      "PR.02"       unused   input  active-high 
	line 111:      "PR.03"       unused   input  active-high 
	line 112:      "PR.04"       unused   input  active-high 
	line 113:      "PR.05"       unused   input  active-high 
	line 114:      "PX.00"       unused   input  active-high 
	line 115:      "PX.01"       unused   input  active-high 
	line 116:      "PX.02"       unused   input  active-high 
	line 117:      "PX.03"       unused   input  active-high 
	line 118:      "PX.04"       unused   input  active-high 
	line 119:      "PX.05"       unused   input  active-high 
	line 120:      "PX.06"       unused   input  active-high 
	line 121:      "PX.07"       unused   input  active-high 
	line 122:      "PY.00"       unused   input  active-high 
	line 123:      "PY.01"       unused   input  active-high 
	line 124:      "PY.02"       unused   input  active-high 
	line 125:      "PY.03"       unused   input  active-high 
	line 126:      "PY.04"       unused   input  active-high 
	line 127:      "PY.05"       unused   input  active-high 
	line 128:      "PY.06"       unused   input  active-high 
	line 129:      "PY.07"       unused   input  active-high 
	line 130:      "PZ.00"       unused   input  active-high 
	line 131:      "PZ.01"  "interrupt"   input  active-high [used]
	line 132:      "PZ.02"       unused   input  active-high 
	line 133:      "PZ.03"       unused   input  active-high 
	line 134:      "PZ.04"       unused   input  active-high 
	line 135:      "PZ.05"       unused   input  active-high 
	line 136:      "PZ.06"       unused   input  active-high 
	line 137:      "PZ.07"       unused   input  active-high 
	line 138:     "PAC.00" "camera-control-output-low" output active-high [used]
	line 139:     "PAC.01"       unused   input  active-high 
	line 140:     "PAC.02"       unused   input  active-high 
	line 141:     "PAC.03"       unused   input  active-high 
	line 142:     "PAC.04"       unused   input  active-high 
	line 143:     "PAC.05"       unused   input  active-high 
	line 144:     "PAC.06"       unused   input  active-high 
	line 145:     "PAC.07"       unused   input  active-high 
	line 146:     "PAD.00"       unused   input  active-high 
	line 147:     "PAD.01"       unused   input  active-high 
	line 148:     "PAD.02"       unused   input  active-high 
	line 149:     "PAD.03"       unused   input  active-high 
	line 150:     "PAE.00"       unused   input  active-high 
	line 151:     "PAE.01"       unused   input  active-high 
	line 152:     "PAF.00"       unused   input  active-high 
	line 153:     "PAF.01"       unused   input  active-high 
	line 154:     "PAF.02"       unused   input  active-high 
	line 155:     "PAF.03"       unused   input  active-high 
	line 156:     "PAG.00"       unused   input  active-high 
	line 157:     "PAG.01"       unused   input  active-high 
	line 158:     "PAG.02"       unused   input  active-high 
	line 159:     "PAG.03"       unused   input  active-high 
	line 160:     "PAG.04"       unused   input  active-high 
	line 161:     "PAG.05"       unused   input  active-high 
	line 162:     "PAG.06"       unused   input  active-high 
	line 163:     "PAG.07"       unused   input  active-high 
gpiochip1 - 32 lines:
	line   0:     "PAA.00"       unused   input  active-high 
	line   1:     "PAA.01"       unused   input  active-high 
	line   2:     "PAA.02"       unused   input  active-high 
	line   3:     "PAA.03"       unused   input  active-high 
	line   4:     "PAA.04"       unused  output  active-high 
	line   5:     "PAA.05" "fixed-regulators:regulator@12" output active-high [used]
	line   6:     "PAA.06"       unused   input  active-high 
	line   7:     "PAA.07"       unused   input  active-high 
	line   8:     "PBB.00"       unused   input  active-high 
	line   9:     "PBB.01"       unused   input  active-high 
	line  10:     "PBB.02"       unused   input  active-high 
	line  11:     "PBB.03"       unused  output  active-high 
	line  12:     "PCC.00"       unused  output  active-high 
	line  13:     "PCC.01"       unused  output  active-high 
	line  14:     "PCC.02"       unused  output  active-high 
	line  15:     "PCC.03"        "mux"  output  active-high [used]
	line  16:     "PCC.04"       unused   input  active-high 
	line  17:     "PCC.05"       unused   input  active-high 
	line  18:     "PCC.06"       unused   input  active-high 
	line  19:     "PCC.07"       unused   input  active-high 
	line  20:     "PDD.00"       unused   input  active-high 
	line  21:     "PDD.01"       unused   input  active-high 
	line  22:     "PDD.02"       unused   input  active-high 
	line  23:     "PEE.00"       unused   input  active-high 
	line  24:     "PEE.01"       unused   input  active-high 
	line  25:     "PEE.02"       unused   input  active-high 
	line  26:     "PEE.03"       unused   input  active-high 
	line  27:     "PEE.04"  "power-key"   input   active-low [used]
	line  28:     "PEE.05"       unused   input  active-high 
	line  29:     "PEE.06"       unused   input  active-high 
	line  30:     "PEE.07"       unused   input  active-high 
	line  31:     "PGG.00"       unused   input  active-high

and from the gpiochip0, I can see that line 49: "PH.06" "camera-control-output-low" output active-high [used]
Then I tried setting up and down with the commands gpioset gpiochip0 49=<1 or 0> and it returned no error but I also didn’t see any effect on the camera feed. What do you think about this route?

ShaneCCC · March 11, 2024, 10:02am

You need remove it from the device tree if you want to control it by gpiofs.

Thanks

musazenbilci · March 11, 2024, 10:11am

I want to explore the options for both use it from software and hardware. Is there a guide I can get help for this?

Also, why do I have to remove it from the device tree because it says [used]?, and what specifically do I need to remove from where?

ShaneCCC · March 12, 2024, 4:40am

Yes, the sensor driver was using, You can unload the sensor driver to release the GPIO pin to use by gpiofs.

musazenbilci · March 12, 2024, 7:37am

But if I release the camera sensor, then I can not use the camera. The purpose here is to trigger the camera module via CAM0_PWDN so it captures frames at the triggered moment. I did not understand the context of using by gpiofs.

ShaneCCC · March 12, 2024, 7:47am

Like using python libs to control the GPIO.

ShaneCCC · March 12, 2024, 7:48am

Please note Jetson NVCSI/VI don’t support trigger mode.

system · April 10, 2024, 5:14am

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Can't use CAM0_PWDN on Jetson Orin Nano DevKIt over script

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