Koichi Kurahashi / Mbed 2 deprecated WS2811_Solidarite

自由の旗が永遠にたなびき続けますように。 flag of freedom, forever.

Dependencies:   PixelArray mbed

https://youtu.be/np0UBqrG1tk

main.cpp@0:61c89e1770be, 2015-11-15 (annotated)

Committer:
TareObjects
Date:
Sun Nov 15 10:29:31 2015 +0000
Revision:
0:61c89e1770be
solidarite.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
TareObjects 0:61c89e1770be 1 #include "mbed.h"
TareObjects 0:61c89e1770be 2 #include "neopixel.h"
TareObjects 0:61c89e1770be 3
TareObjects 0:61c89e1770be 4 // This must be an SPI MOSI pin.
TareObjects 0:61c89e1770be 5 #define DATA_PIN dp2
TareObjects 0:61c89e1770be 6
TareObjects 0:61c89e1770be 7 #define N_COL 8
TareObjects 0:61c89e1770be 8 #define N_ROW 8
TareObjects 0:61c89e1770be 9 #define N_LED (N_COL * N_ROW)
TareObjects 0:61c89e1770be 10
TareObjects 0:61c89e1770be 11 #define N_WAVE 128
TareObjects 0:61c89e1770be 12
TareObjects 0:61c89e1770be 13 float wave[N_WAVE];
TareObjects 0:61c89e1770be 14 int gSpeed;
TareObjects 0:61c89e1770be 15
TareObjects 0:61c89e1770be 16 void generate(neopixel::Pixel * out, uint32_t index, uintptr_t extra)
TareObjects 0:61c89e1770be 17 {
TareObjects 0:61c89e1770be 18 uint8_t red, green, blue;
TareObjects 0:61c89e1770be 19
TareObjects 0:61c89e1770be 20 int x = index % N_COL;
TareObjects 0:61c89e1770be 21
TareObjects 0:61c89e1770be 22 red = green = blue = 0;
TareObjects 0:61c89e1770be 23 uint8_t val = 8.0 * wave[((x+extra)*gSpeed) % N_WAVE] + 16.0 * wave[extra % N_WAVE] + 16.0;
TareObjects 0:61c89e1770be 24 val = val / 2;
TareObjects 0:61c89e1770be 25 if (x <= 2) {
TareObjects 0:61c89e1770be 26 blue = val;
TareObjects 0:61c89e1770be 27 } else if (x <= 5) {
TareObjects 0:61c89e1770be 28 red = green = blue = val / 2;
TareObjects 0:61c89e1770be 29 } else {
TareObjects 0:61c89e1770be 30 red = val;
TareObjects 0:61c89e1770be 31 }
TareObjects 0:61c89e1770be 32
TareObjects 0:61c89e1770be 33 out->red = red;
TareObjects 0:61c89e1770be 34 out->green = green;
TareObjects 0:61c89e1770be 35 out->blue = blue;
TareObjects 0:61c89e1770be 36 }
TareObjects 0:61c89e1770be 37
TareObjects 0:61c89e1770be 38 int main()
TareObjects 0:61c89e1770be 39 {
TareObjects 0:61c89e1770be 40 // Create a temporary DigitalIn so we can configure the pull-down resistor.
TareObjects 0:61c89e1770be 41 // (The mbed API doesn't provide any other way to do this.)
TareObjects 0:61c89e1770be 42 // An alternative is to connect an external pull-down resistor.
TareObjects 0:61c89e1770be 43 DigitalIn(DATA_PIN, PullDown);
TareObjects 0:61c89e1770be 44
TareObjects 0:61c89e1770be 45 // The pixel array control class.
TareObjects 0:61c89e1770be 46 neopixel::PixelArray array(DATA_PIN);
TareObjects 0:61c89e1770be 47
TareObjects 0:61c89e1770be 48 for (int i = 0; i < N_WAVE; i++) {
TareObjects 0:61c89e1770be 49 wave[i] = sin((float)i / (float)N_WAVE * 3.14159265 * 2.0) * 0.5 + 0.5;
TareObjects 0:61c89e1770be 50 }
TareObjects 0:61c89e1770be 51
TareObjects 0:61c89e1770be 52 int offset = 0;
TareObjects 0:61c89e1770be 53 gSpeed = 8;
TareObjects 0:61c89e1770be 54
TareObjects 0:61c89e1770be 55 while(1) {
TareObjects 0:61c89e1770be 56 array.update(generate, N_LED, offset++);
TareObjects 0:61c89e1770be 57 if (offset >= N_WAVE) {
TareObjects 0:61c89e1770be 58 offset = 0;
TareObjects 0:61c89e1770be 59 gSpeed = (rand() % 8) + 4;
TareObjects 0:61c89e1770be 60 }
TareObjects 0:61c89e1770be 61
TareObjects 0:61c89e1770be 62 wait_ms(20);
TareObjects 0:61c89e1770be 63 }
TareObjects 0:61c89e1770be 64 }