MAX6675 example & smoke test

Author: jmhobbs

examples/max6675/main.go

@@ -0,0 +1,34 @@
+package main
+
+import (
+	"fmt"
+	"machine"
+	"time"
+
+	"tinygo.org/x/drivers/max6675"
+)
+
+// example for reading temperature from a thermocouple
+func main() {
+	// Pins are for an Adafruit Feather nRF52840 Express
+	machine.D5.Configure(machine.PinConfig{Mode: machine.PinOutput})
+	machine.D5.High()
+
+	machine.SPI0.Configure(machine.SPIConfig{
+		Frequency: 1_000_000,
+		SCK:       machine.SPI0_SCK_PIN,
+		SDI:       machine.SPI0_SDI_PIN,
+	})
+
+	thermocouple := max6675.NewDevice(machine.SPI0, machine.D5)
+
+	for {
+		temp, err := thermocouple.Read()
+		if err != nil {
+			println(err)
+			return
+		}
+		fmt.Printf("%0.02f C : %0.02f F\n", temp, (temp*9/5)+32)
+		time.Sleep(time.Second)
+	}
+}

smoketest.sh

@@ -139,6 +139,7 @@ tinygo build -size short -o ./build/test.uf2 -target=pico ./examples/mcp9808/mai
 tinygo build -size short -o ./build/test.uf2 -target=pico ./examples/tmc2209/main.go
 tinygo build -size short -o ./build/test.hex -target=pico ./examples/tmc5160/main.go
 tinygo build -size short -o ./build/test.uf2 -target=nicenano ./examples/sharpmem/main.go
+tinygo build -size short -o ./build/test.hex -target=feather-nrf52840 ./examples/max6675/main.go
 # network examples (espat)
 tinygo build -size short -o ./build/test.hex -target=challenger-rp2040 ./examples/net/ntpclient/
 # network examples (wifinina)