func main() {
// creates a new MCP23S17 instance
mcp := MCP23S17.NewMCP23S17(spi.DEFAULT_HARDWARE_ADDR, spi.DEFAULT_BUS, spi.DEFAULT_CHIP)
// GPIOa outputs
gpioa := make([]*MCP23S17.MCP23S17RegisterBit, 8)
for i := range gpioa {
gpioa[i] = MCP23S17.NewMCP23S17RegisterBit(uint(i), MCP23S17.GPIOA, mcp)
}
// Connects to chip
err := mcp.Open()
if err != nil {
log.Fatalf("Error connecting to chip: %s\n", err)
}
// Blinks output 7
for {
gpioa[7].Toggle()
time.Sleep(time.Second)
}
}
// Create a new PiFaceDigital Instance
func NewPiFaceDigital(hardware_addr byte, bus int, chip_select int) *PiFaceDigital {
pfd := new(PiFaceDigital)
pfd.mcp = MCP23S17.NewMCP23S17(hardware_addr, bus, chip_select)
// pfd.device = interrupts.NewGPIOInterruptDevice()
pfd.InputPins = make([]*MCP23S17.MCP23S17RegisterBitNeg, 8)
for i := range pfd.InputPins {
pfd.InputPins[i] = MCP23S17.NewMCP23S17RegisterBitNeg(uint(i), MCP23S17.GPIOB, pfd.mcp)
}
pfd.InputPort = MCP23S17.NewMCP23S17RegisterNeg(MCP23S17.GPIOB, pfd.mcp)
pfd.OutputPins = make([]*MCP23S17.MCP23S17RegisterBit, 8)
for i := range pfd.OutputPins {
pfd.OutputPins[i] = MCP23S17.NewMCP23S17RegisterBit(uint(i), MCP23S17.GPIOA, pfd.mcp)
}
pfd.OutputPort = MCP23S17.NewMCP23S17Register(MCP23S17.GPIOA, pfd.mcp)
pfd.Leds = make([]*MCP23S17.MCP23S17RegisterBit, 8)
for i := range pfd.Leds {
pfd.Leds[i] = MCP23S17.NewMCP23S17RegisterBit(uint(i), MCP23S17.GPIOA, pfd.mcp)
}
pfd.Relays = make([]*MCP23S17.MCP23S17RegisterBit, 2)
for i := range pfd.Relays {
pfd.Relays[i] = MCP23S17.NewMCP23S17RegisterBit(uint(i), MCP23S17.GPIOA, pfd.mcp)
}
pfd.Switches = make([]*MCP23S17.MCP23S17RegisterBit, 4)
for i := range pfd.Switches {
pfd.Switches[i] = MCP23S17.NewMCP23S17RegisterBit(uint(i), MCP23S17.GPIOB, pfd.mcp)
}
return pfd
}