software: Implement serial port printout

This validates that the code is able to get data from the serial port.

2 files changed, 40 insertions, 1 deletions

diff --git a/software/communication/physical.go b/software/communication/physical.go
index 25d5299..f79d382 100644
--- a/software/communication/physical.go
+++ b/software/communication/physical.go
@@ -1,6 +1,9 @@
 package communication
 
 import (
+	"fmt"
+
+	"go.bug.st/serial"
 	"go.bug.st/serial/enumerator"
 )
 
@@ -8,6 +11,10 @@ const (
 	ST_VID = `0483`
 )
 
+type Phy struct {
+	port serial.Port
+}
+
 func GetStSerials() ([]string, error) {
 	retval := make([]string, 0)
 
@@ -26,3 +33,27 @@ func GetStSerials() ([]string, error) {
 
 	return retval, nil
 }
+
+func NewPhy(device string) (Phy, error) {
+	p := Phy{}
+	mode := &serial.Mode{
+		BaudRate: 115200,
+	}
+	port, err := serial.Open(device, mode)
+	if err != nil {
+		return p, err
+	}
+	p.port = port
+	return p, nil
+}
+
+func (phy *Phy) Cat() error {
+	buff := make([]byte, 100)
+	for {
+		n, err := phy.port.Read(buff)
+		if err != nil {
+			return err
+		}
+		fmt.Printf("%s", string(buff[:n]))
+	}
+}
diff --git a/software/main.go b/software/main.go
index 66fb8a6..48b71e7 100644
--- a/software/main.go
+++ b/software/main.go
@@ -16,5 +16,13 @@ func main() {
 		log.Fatalf("Require exactly one serial port from STMicroelectronics but %d attached", len(ports))
 	}
 
-	log.Printf("Detected port: %s\n", ports[0])
+	log.Printf("Detected serial port: %s\n", ports[0])
+
+	phy, err := communication.NewPhy(ports[0])
+
+	log.Println("Starting to print out incoming data from serial port")
+	err = phy.Cat()
+	if err != nil {
+		log.Fatal(err)
+	}
 }