Script to configure a software bit-banged SPI interface on the Omega2

setupSpiBitbang.sh

#!/bin/sh

## insmod spi-gpio-custom bus%d=%d,%d,%d,%d,%d,%d,%d

## From OnionIoT/spi-gpio-driver:
##
#	sprintf(cmd, SPI_DEV_INSMOD_TEMPLATE, 	params->busNum, params->deviceId,
#												params->sckGpio,
#												params->mosiGpio,
#												params->misoGpio,
#												params->mode,
#												params->speedInHz,
#												params->csGpio
#	);

# since gpios 4 and 5 are used:
omega2-ctrl gpiomux set i2c gpio

busNum=0
deviceId=1

sckGpio=4
mosiGpio=19
misoGpio=18

mode=0
speedInHz=25000000

csGpio=5

echo "> Registering SPI bitbang interface.."
echo "  /dev/spi${busNum}.${deviceId}"
echo "  CLK  = GPIO${sckGpio}"
echo "  MOSI = GPIO${mosiGpio}"
echo "  MISO = GPIO${misoGpio}"
echo "  CS   = GPIO${csGpio}"

cmd="insmod spi-gpio-custom bus${busNum}=${deviceId},${sckGpio},${mosiGpio},${misoGpio},${mode},${speedInHz},${csGpio}"

echo "$cmd"
$cmd

echo "> Done"