#!/bin/sh

# on GK7205V200:
# GPIO1_0 -> GPIO8 (1*8+0 = 8)
# GPIO1_1 -> GPIO9 (1*8+1 = 9)

# on GK7205V300:
# GPIO1_3 -> GPIO11
# GPIO1_2 -> GPIO10

#(normal mode)
ir_cut_enable() {
  # pin_mux
  echo "$gpio_0" >/sys/class/gpio/unexport
  echo "$gpio_1" >/sys/class/gpio/unexport
  echo "$gpio_0" >/sys/class/gpio/export
  echo "$gpio_1" >/sys/class/gpio/export

  # dir
  echo "out" >/sys/class/gpio/gpio$gpio_0/direction
  echo "out" >/sys/class/gpio/gpio$gpio_1/direction

  # data, gpio_1: 0, gpio_0: 1  (normal mode)
  echo "1" >/sys/class/gpio/gpio$gpio_0/value
  echo "0" >/sys/class/gpio/gpio$gpio_1/value

  #sleep 1s
  sleep 1

  # back to original
  echo "0" >/sys/class/gpio/gpio$gpio_0/value
  echo "0" >/sys/class/gpio/gpio$gpio_1/value
}

# (ir mode)
ir_cut_disable() {
  # pin_mux
  echo "$gpio_0" >/sys/class/gpio/unexport
  echo "$gpio_1" >/sys/class/gpio/unexport
  echo "$gpio_0" >/sys/class/gpio/export
  echo "$gpio_1" >/sys/class/gpio/export

  # dir
  echo "out" >/sys/class/gpio/gpio$gpio_0/direction
  echo "out" >/sys/class/gpio/gpio$gpio_1/direction

  # data, gpio_1: 1, gpio_0: 0  (ir mode)
  echo "0" >/sys/class/gpio/gpio$gpio_0/value
  echo "1" >/sys/class/gpio/gpio$gpio_1/value

  #sleep 1s
  sleep 1

  # back to original
  echo "0" >/sys/class/gpio/gpio$gpio_0/value
  echo "0" >/sys/class/gpio/gpio$gpio_1/value
}

gpio_0=0
gpio_1=0

if [ $# -lt 2 ]; then
  echo "usage : ./ircut_demo <chip> <mode>"
  echo "for example:"
  echo "ir mode : ./ircut_demo gk7205v200 1"
else
  if [ $1 = "gk7205v200" ]; then
    gpio_0=8
    gpio_1=9
  elif [ $1 = "gk7205v300" ]; then
    gpio_0=11
    gpio_1=10
  else
    echo "wrong chipid: $1, please select: gk7205v200 or gk7205v300."
    exit
  fi

  if [ $2 -eq 0 ]; then
    echo "normal mode, ir_cut on"
    ir_cut_enable >/dev/null
  elif [ $2 -eq 1 ]; then
    echo "ir mode, ir_cut off"
    ir_cut_disable >/dev/null
  else
    echo "invalid mode, please slect 0 or 1."
  fi
fi