software: communication: Add SerialInterface

This new type bundles the whole communication stack. This is easier to
use than handling types for each layer on the user side of the
communication package.

1 files changed, 52 insertions, 0 deletions

diff --git a/software/communication/interface.go b/software/communication/interface.go
new file mode 100644
index 0000000..d6111cc
--- /dev/null
+++ b/software/communication/interface.go
@@ -0,0 +1,52 @@
+package communication
+
+import (
+	"fmt"
+	"log"
+
+	"go.bug.st/serial"
+)
+
+type SerialInterface struct {
+	port serial.Port
+}
+
+func NewSerialInterface() (SerialInterface, error) {
+	iface := SerialInterface{}
+
+	devices, err := getStSerials()
+	if err != nil {
+		return iface, err
+	}
+
+	if len(devices) != 1 {
+		return iface, fmt.Errorf("Require exactly one serial device from STMicroelectronics but %d attached", len(devices))
+	}
+	device := devices[0]
+
+	iface.port, err = openSerial(device)
+	if err != nil {
+		return iface, err
+	}
+
+	return iface, nil
+}
+
+func (i *SerialInterface) Log() {
+	for {
+		data, err := i.Read()
+		if err != nil {
+			log.Fatal(err)
+		}
+		log.Printf("RX: '%s'\n", string(data))
+	}
+}
+
+func (i *SerialInterface) Read() ([]byte, error) {
+	buff := make([]byte, 100)
+	n, err := i.port.Read(buff)
+	if err != nil {
+		return []byte{}, err
+	}
+	return buff[:n], nil
+}