#! /bin/bash
set -ex

# add stuff we want to config.txt
add = <<-END
	dtparam=spi=on
	# we can adjust these values as needed
	dtparam=cooling_fan=on,fan_temp0=62000,fan_temp0_hyst=8000,fan_temp0_speed=80,fan_temp1=70000,fan_temp1_hyst=5000,fan_temp1_speed=100,fan_temp2=76000,fan_temp2_hyst=4000,fan_temp2_speed=170,fan_temp3=80000,fan_temp3_hyst=3000,fan_temp3_speed=250
	# enable i2s for audio
	dtparam=i2s=on
	# use an external antenna instead of the pcb antenna on the CM
	dtparam=ant2
	# load our audio driver
	dtoverlay=toesaudio
	# enable gpio12 which we use to reset the audio codec
	gpio=12=op,dh
END

sed -i "s/dtparam=spi=on/$add" mnt/boot/config.txt

# we don't need fancy graphics. we don't have a screen.
echo "\ngpu_mem=16" >>mnt/boot/config.txt