Add most functions provided by STM

Following commands are implemented:
    power       - PowerTick
    led         - LED1 and LED2
    clr         - ClearDisplay
    text        - PrintText
    dut         - DUT
    ts          - TS

Link to documentation of all functions:
https://wiki.tizen.org/MuxPi#Features_accessible_thorugh_Cortex-M0

Change-Id: I4dac5c828d8062761a2014ef679192125f0a9154

diff --git a/stm/stm.go b/stm/stm.go
index 16622c5..f60a550 100644 (file)
--- a/stm/stm.go
+++ b/stm/stm.go
@@ -23,6 +23,7 @@ import (
        "io"
        "strings"
        "sync"
+       "time"
 
        "github.com/tarm/serial"
 )
@@ -32,6 +33,28 @@ const (
        retryLimit = 8
 )
 
+// Color denotes a string representation of a color accepted by STM.
+//
+// MuxPi has only two colors available: orange (foreground), black (background).
+type Color string
+
+const (
+       // Foreground is displayed as orange, usually (255, 128, 0) in RGB notation.
+       Foreground Color = "on"
+       // Background is black, no pixels are lighted.
+       Background = "off"
+)
+
+// LED represents all LEDs available via STM.
+type LED string
+
+const (
+       // LED1 is an RGB LED located in the bottom-left corner of MuxPi.
+       LED1 LED = "1"
+       // LED2 is an RGB LED located on the right of the OLED display.
+       LED2 = "2"
+)
+
 // STM provides methods to execute commands via serial interface.
 //
 // It is safe for concurrent use.
@@ -136,3 +159,34 @@ func (stm *STM) noEcho() (err error) {
        }
        return fmt.Errorf("retry limit exceeded")
 }
+
+// PowerTick cuts power off DUT, waits specified time and switches power back on.
+func (stm *STM) PowerTick(d time.Duration) error {
+       return stm.executeCommand(fmt.Sprintf("power tick %d", int(d/time.Millisecond)))
+}
+
+// SetLED sets color of an RGB LED.
+func (stm *STM) SetLED(led LED, r, g, b uint8) error {
+       return stm.executeCommand(fmt.Sprintf("led %s %d %d %d", led, r, g, b))
+}
+
+// ClearDisplay clears the OLED display.
+func (stm *STM) ClearDisplay() error {
+       return stm.executeCommand("clr")
+}
+
+// PrintText prints text at x,y position (from top-left corner) in color.
+func (stm *STM) PrintText(x, y uint, color Color, text string) error {
+       return stm.executeCommand(fmt.Sprintf("text %d %d %s %s", x, y, color, text))
+}
+
+// DUT instructs STM to connect microSD card and power to a DUT (Device Under Test).
+func (stm *STM) DUT() error {
+       return stm.executeCommand("dut")
+}
+
+// TS instructs STM to connect microSD card to TS (test server)
+// and disconnect power source from a DUT.
+func (stm *STM) TS() error {
+       return stm.executeCommand("ts")
+}