#!/bin/sh -
# Voodoo to load a new bitstream image into the FPGA on a Novena PVT-1.

if test $# -ne 1 || test ! -f "$1"
then
    echo 1>&2 "usage: $0 bitstream-file"
    exit 1
fi

echo "Setting export of reset pin"
echo 135 > /sys/class/gpio/export

echo "Setting reset pin to out"
echo out > /sys/class/gpio/gpio135/direction

echo "Flipping reset"
echo 0 > /sys/class/gpio/gpio135/value
echo 1 > /sys/class/gpio/gpio135/value

echo "Configuring FPGA from $1"
dd if="$1" of=/dev/spidev2.0 bs=32

echo "Turning on clock to FPGA"
eim_peek_poke --write 0x020c8160 0x00000d2b