First draft of neopixel

This commit is contained in:
Michal Moskal 2016-04-03 17:38:50 -07:00
parent 02c41b59bd
commit 8a124812b6
5 changed files with 267 additions and 0 deletions

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@ -12,6 +12,11 @@ namespace BufferMethods {
ManagedBuffer(buf).setByte(off, v); ManagedBuffer(buf).setByte(off, v);
} }
//%
uint8_t *getBytes(Buffer buf) {
return buf->payload;
}
/** Returns the length of a Buffer object. */ /** Returns the length of a Buffer object. */
//% property //% property
int length(Buffer s) { int length(Buffer s) {

20
libs/neopixel/kind.json Normal file
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@ -0,0 +1,20 @@
{
"name": "neppixel",
"description": "AdaFruit NeoPixel driver for micro:bit",
"files": [
"neopixel.ts",
"sendbuffer.asm"
],
"testFiles": [
"neotest.ts"
],
"microbit": {
"config": {
"MICROBIT_BLE_ENABLED": "0"
}
},
"public": true,
"dependencies": {
"microbit": "file:../microbit"
}
}

88
libs/neopixel/neopixel.ts Normal file
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@ -0,0 +1,88 @@
namespace neopixel {
//% shim=sendBufferAsm
function sendBuffer(buf: Buffer, pin: DigitalPin) {
}
class Strip {
buf: Buffer;
pin: DigitalPin;
brightness: number;
length() {
return this.buf.length / 3
}
/**
* Set the brightness of the strip, 0-255.
*/
setBrigthness(brightness: number): void {
this.brightness = brightness;
}
/**
* Set the pin where the neopixel is connected, defaults to P0.
*/
setPin(pin: DigitalPin): void {
this.pin = pin;
pins.digitalWritePin(this.pin, 0)
basic.pause(50)
}
/**
* Turn off all LEDs.
*/
clear(): void {
this.buf.fill(0);
}
/**
* Shift LEDs forward.
*/
shift(off: number): void {
this.buf.shift(-off * 3)
}
/**
* Shift LEDs forward.
*/
rotate(): void {
this.buf.rotate(-3)
}
display() {
basic.pause(1)
sendBuffer(this.buf, this.pin);
}
/**
* Set give LED to a given color (range 0-255 for r, g, b)
*/
setPix(ledoff: number, r: number, g: number, b: number): void {
ledoff = ledoff * 3;
let br = this.brightness;
if (br < 255) {
r = (Math.clamp(0, 255, r) * br) >> 8;
g = (Math.clamp(0, 255, b) * br) >> 8;
b = (Math.clamp(0, 255, b) * br) >> 8;
}
let buf = this.buf;
buf[ledoff + 0] = Math.clamp(0, 255, g);
buf[ledoff + 1] = Math.clamp(0, 255, r);
buf[ledoff + 2] = Math.clamp(0, 255, b);
}
}
/**
* Create a new NeoPixel driver for `numleds` LEDs.
* @params numleds number of leds in the strip, eg: 24,30,60,64
*/
export function create(numleds: number): Strip {
let strip = new Strip();
strip.buf = pins.createBuffer(numleds * 3);
strip.setBrigthness(255)
strip.setPin(DigitalPin.P0)
return strip;
}
}

92
libs/neopixel/neotest.ts Normal file
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@ -0,0 +1,92 @@
basic.showLeds(`
# . . . .
. . . . .
. . # . .
. . . . .
. . . . #
`)
console.log("Start")
// Create a NeoPixel driver - specify the number of LEDs:
let strip = neopixel.create(24);
// If your strip is not at P0, specify the pin.
strip.setPin(DigitalPin.P0)
// Brightness defaults to 255 (very bright); 0 is completely off.
strip.setBrigthness(20)
// Set pixels - pixel number, followed by red, green and blue values, between 0 and 255.
strip.setPix(0, 255, 255, 255);
strip.setPix(1, 0, 255, 255);
strip.setPix(2, 255, 0, 255);
strip.setPix(3, 255, 255, 0);
console.log("Send!")
// Send the image to the strip.
strip.display();
basic.pause(500);
console.log("Sent!")
// Green light travelling the strip:
for (let l = 0; l < strip.length(); l++) {
strip.clear();
strip.setPix(l, 0, 255, 0);
strip.display();
basic.pause(100);
}
let special = false;
let numcol = 0;
input.onButtonPressed(Button.A, () => {
special = true;
let r = 0;
let g = 0;
let b = 0;
if (numcol == 0) {
r = 255;
g = 255;
b = 255;
} else if (numcol == 1) {
r = 255;
} else if (numcol == 2) {
b = 255;
} else if (numcol == 3) {
r = 255;
g = 255;
} else if (numcol == 4) {
r = 10;
g = 10;
b = 10;
}
numcol = (numcol + 1) % 5;
for (let k = 0; k < 7; k++) {
strip.setPix(k, r, g, b);
}
strip.display();
});
control.inBackground(() => {
for (let j = 0; j < 2000000; j++) {
if (special) {
basic.pause(100);
continue;
}
let r1 = (0 + j * 2) & 63;
let g1 = (20 + j * 1) & 63;
let b1 = (30 + j * 3) & 63;
for (let i = 0; i < strip.length(); i++) {
strip.setPix(i, (r1 - i) * 20, (g1 - i) * 20, (b1 - i) * 20);
}
strip.display()
basic.pause(60);
}
});
control.inBackground(() => {
while (true) {
basic.showString("XMAS!", 150);
}
});

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@ -0,0 +1,62 @@
push {r4,r5,r6,r7,lr}
mov r4, r0 ; save buff
mov r6, r1 ; save pin
mov r0, r4
bl buffer::count
mov r5, r0
mov r0, r4
bl buffer::cptr
mov r4, r0
; setup pin as digital
mov r0, r6
movs r1, #0
bl micro_bit::digitalWritePin
; load pin address
mov r0, r6
ldr r0, [r0, #8] ; get mbed DigitalOut from MicroBitPin
ldr r1, [r0, #4] ; r1-mask for this pin
ldr r2, [r0, #16] ; r2-clraddr
ldr r3, [r0, #12] ; r3-setaddr
cpsid i ; disable irq
b .start
.nextbit: ; C0
str r1, [r3, #0] ; pin := hi C2
tst r6, r0 ; C3
bne .islate ; C4
str r1, [r2, #0] ; pin := lo C6
.islate:
lsrs r6, r6, #1 ; r6 >>= 1 C7
bne .justbit ; C8
; not just a bit - need new byte
adds r4, #1 ; r4++ C9
subs r5, #1 ; r5-- C10
bcc .stop ; if (r5<0) goto .stop C11
.start:
movs r6, #0x80 ; reset mask C12
nop ; C13
.common: ; C13
str r1, [r2, #0] ; pin := lo C15
; always re-load byte - it just fits with the cycles better this way
ldrb r0, [r4, #0] ; r0 := *r4 C17
b .nextbit ; C20
.justbit: ; C10
; no nops, branch taken is already 3 cycles
b .common ; C13
.stop:
str r1, [r2, #0] ; pin := lo
cpsie i ; enable irq
pop {r4,r5,r6,r7,pc}