Move buttons to TS

libs/core/buttons.ts

@@ -0,0 +1,129 @@
+
+/**
+ * Patterns for lights under the buttons.
+ */
+const enum LightsPattern {
+    Off = 0,  // LED_BLACK
+    Green = 1,  // LED_GREEN
+    Red = 2,  // LED_RED
+    Orange = 3,  // LED_ORANGE
+    GreenFlash = 4,  // LED_GREEN_FLASH
+    RedFlash = 5,  // LED_RED_FLASH
+    OrangeFlash = 6,  // LED_ORANGE_FLASH
+    GreenPulse = 7,  // LED_GREEN_PULSE
+    RedPulse = 8,  // LED_RED_PULSE
+    OrangePulse = 9,  // LED_ORANGE_PULSE
+}
+
+namespace input {
+    let btnsMM: MMap
+    let buttons: DevButton[]
+
+    export namespace internal {
+        export function getBtnsMM() {
+            initBtns()
+            return btnsMM;
+        }
+    }
+
+    function readButtons() {
+        let sl = btnsMM.slice(0, LMS.NUM_BUTTONS)
+        let ret = 0
+        for (let i = 0; i < sl.length; ++i) {
+            if (sl[i])
+                ret |= 1 << i
+        }
+        return ret
+    }
+
+    function initBtns() {
+        if (btnsMM) return
+        btnsMM = control.mmap("/dev/lms_ui", LMS.NUM_BUTTONS, 0)
+        if (!btnsMM) control.fail("no buttons?")
+        buttons = []
+        input.internal.unsafePollForChanges(50, readButtons, (prev, curr) => {
+            if (curr & LMS.BUTTON_ID_ESCAPE)
+                control.reset()
+            for (let b of buttons)
+                b.update(!!(curr & b.mask))
+        })
+        control.dmesg("runtime started, " + control.deviceFirmwareVersion())
+    }
+
+    class DevButton extends Button {
+        mask: number
+        constructor(mask: number) {
+            super()
+            this.mask = mask
+            initBtns()
+            buttons.push(this)
+        }
+    }
+
+    initBtns() // always ON as it handles ESCAPE button
+
+    /**
+     * Left button.
+     */
+    //% whenUsed block="button left" weight=95 fixedInstance
+    export const buttonLeft: Button = new DevButton(LMS.BUTTON_ID_LEFT)
+
+    /**
+     * Right button.
+     */
+    //% whenUsed block="button right" weight=94 fixedInstance
+    export const buttonRight: Button = new DevButton(LMS.BUTTON_ID_RIGHT)
+
+    /**
+     * Up button.
+     */
+    //% whenUsed block="button up" weight=95 fixedInstance
+    export const buttonUp: Button = new DevButton(LMS.BUTTON_ID_UP)
+
+    /**
+     * Down button.
+     */
+    //% whenUsed block="button down" weight=95 fixedInstance
+    export const buttonDown: Button = new DevButton(LMS.BUTTON_ID_DOWN)
+
+    /**
+     * Enter button.
+     */
+    //% whenUsed block="button enter" weight=95 fixedInstance
+    export const buttonEnter: Button = new DevButton(LMS.BUTTON_ID_ENTER)
+}
+
+
+namespace control {
+    /**
+     * Determine the version of system software currently running.
+     */
+    export function deviceFirmwareVersion(): string {
+        let buf = output.createBuffer(6)
+        input.internal.getBtnsMM().read(buf)
+        let r = ""
+        for (let i = 0; i < buf.length; ++i) {
+            let c = buf[i]
+            if (c == 0) break
+            r += String.fromCharCode(c)
+        }
+        return r
+    }
+}
+
+namespace output {
+    let currPattern: LightsPattern
+
+    /**
+     * Set lights.
+     */
+    //% blockId=setLights block="set lights %pattern" 
+    export function setLights(pattern: LightsPattern): void {
+        if (currPattern === pattern)
+            return
+        currPattern = pattern
+        let cmd = output.createBuffer(2)
+        cmd[0] = pattern + 48
+        input.internal.getBtnsMM().write(cmd)
+    }
+}