added some helper scripts for bringing up the camera module without t…

…he kernel driver

utils/enable-camera-gpio.sh

@@ -0,0 +1,56 @@
+#!/bin/bash
+set -x
+
+if [ $UID -ne 0 ]
+then 
+  echo ERROR: must be root
+  exit 1
+fi
+
+# pass the gpio # and the value to set
+set_gpio() {
+  set -x
+  GPIO=$1
+  GPIOPATH=/sys/class/gpio/gpio$GPIO
+  VAL=$2
+
+  ls /sys/class/gpio/ | grep gpio$GPIO > /dev/null
+  # first export the GPIO is it isnt already
+  if [ $? -ne 0 ]; then
+    echo "File not found!"
+    echo $GPIO > /sys/class/gpio/export
+  fi
+
+  # set GPIO direction
+  echo out > $GPIOPATH/direction
+
+  # set GPIO value
+  echo $VAL > $GPIOPATH/value
+}
+
+# enable camera output active low
+set_gpio 96 0
+
+# enable camera clock clk active high
+set_gpio 106 1
+
+# disable reset active low (drive high)
+set_gpio 84 1
+
+# set i2c address with saddr line low (0x20)
+set_gpio 83 0
+
+# disable standby active high (drive low)
+set_gpio 82 0
+
+# no trigger active high
+set_gpio 98 0
+
+# enable voltage regulators on image sensor active high
+set_gpio 100 1
+
+# finally, enable image sensor control lines so all the
+# above signals are sent to image sensor
+set_gpio 85 0 
+
+

utils/i2c-16-read.sh

@@ -0,0 +1,32 @@
+#!/usr/bin/python3
+
+# This script writes the board ID to the EEPROM in the OSD3358 and reads
+# it back afterwards. I ran it on another pocketbealge using i2c-2, but
+# it would probably work on other boards with a i2c peripheral
+
+import io
+import fcntl
+import sys
+
+# i2c slave address is first argument
+slave_addr = int(sys.argv[1], 16)
+
+reg = int(sys.argv[2], 16)
+
+addr_bu = (reg >> 8) & 0xff # address upper byte
+addr_bl = reg & 0xff # address lower byte
+
+# I think this is python ioctl/i2c specific magic bytes?
+IOCTL_I2C_SLAVE = 0x0703
+
+# open the I2C device and set it up to talk to the slave
+f = io.open("/dev/i2c-2", "wb+", buffering=0)
+fcntl.ioctl(f, IOCTL_I2C_SLAVE, slave_addr)
+
+# write the register value
+f.write(bytearray([addr_bu, addr_bl]))
+
+# read back the register value
+v = f.read(2)
+print("Reg: ", hex(slave_addr), " Value: 0x", v.hex(), sep='')
+

utils/standby-camera-gpio.sh

@@ -0,0 +1,50 @@
+#!/bin/bash
+set -x
+
+if [ $UID -ne 0 ]
+then 
+  echo ERROR: must be root
+  exit 1
+fi
+
+# pass the gpio # and the value to set
+set_gpio() {
+  set -x
+  GPIO=$1
+  GPIOPATH=/sys/class/gpio/gpio$GPIO
+  VAL=$2
+
+  ls /sys/class/gpio/ | grep gpio$GPIO > /dev/null
+  # first export the GPIO is it isnt already
+  if [ $? -ne 0 ]; then
+    echo "File not found!"
+    echo $GPIO > /sys/class/gpio/export
+  fi
+
+  # set GPIO direction
+  echo out > $GPIOPATH/direction
+
+  # set GPIO value
+  echo $VAL > $GPIOPATH/value
+}
+
+# enable camera output active low
+set_gpio 96 1
+
+# enable camera clock clk active high
+set_gpio 106 0
+
+# disable reset active low 
+set_gpio 84 0
+
+# disable standby active high 
+set_gpio 82 1
+
+# enable voltage regulators on image sensor active high
+set_gpio 100 0
+
+# finally, enable image sensor control lines so all the
+# above signals are sent to image sensor
+set_gpio 85 0 
+
+