STM32C0116-DKとWS2812B(3個)でランダムに光らせる。

参考

• ユーザマニュアル (1)

• M5Stack用RGB LEDユニット(SK6812)

結果

プログラム

• RGB LED out PA2 pin
• (GPIOA->ODR) PA2

//GPIO_WS2812B_RAND_C0116_1


//インクルド
#include <Arduino.h>


//プロトタイプ宣言
void bit_on1();   //(1)ビット
void bit_off1();  //(0)ビット


//定義
//フルカラー(RGB)LEDの設定領域
int l[90];  //max30 led

int on1;   //ビットのオン
int off1;  //ビットのオフ


//フルカラー(RGB)LEDの点灯関数　引数は、バイト数
void ws_led(int num1) {

  int led_b;  //バイトの一時

  //オンオフの設定 PA(x)
  //                    1111110000000000
  //                    5432109876543210
  on1  = GPIOA->ODR | 0b0000000000000100;
  off1 = GPIOA->ODR & 0b1111111111111011;

  //バイト数分だけループする
  for (int ii = 0; ii < num1; ii++) {

    //8ビット分送る
    led_b = l[ii];     //次の1バイト
    int jj = 8;        //カウンター
    while (jj != 0) {  //8から0

      //ビット毎にオン、オフを送信
      if ((led_b & 0x80)) {
        bit_on1();  //ビットが1
      } else {
        bit_off1();  //ビットが0
      }  //endif

      led_b = led_b << 1;  //1ビットシフト
      jj--;                //1引く
    }  //while 8bit

  }  //for max30byt

}  //ws_led


//初期化
void setup() {

  randomSeed(micros());  //乱数の初期化

  //ピンの初期化
  pinMode(PA2, OUTPUT);

}  //setup


//メインループ
void loop() {

  //debug
  //l[3*0+0] = 32;
  //l[3*0+1] = 10;
  //l[3*0+2] = 0;
  //
  //l[3*1+0] = 0;
  //l[3*1+1] = 20;
  //l[3*1+2] = 32;
  //
  //l[3*2+0] = 32;
  //l[3*2+1] = 30;
  //l[3*2+2] = 32;

  //ランダムの値の設定
  for (int ii = 0; ii < 9; ii++) {
    l[ii] = random(32);
  }  //for

  //ws2812bへデータを送る
  ws_led(9);

  //1秒待つ
  delay(1000);

}  //loop


// 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3
void bit_off1() {
  //0.3us 800khz
  GPIOA->ODR = on1;

  GPIOA->ODR = on1;
  GPIOA->ODR = on1;
  GPIOA->ODR = on1;
  GPIOA->ODR = on1;
  GPIOA->ODR = on1;
  GPIOA->ODR = on1;
  GPIOA->ODR = on1;
  GPIOA->ODR = on1;
  GPIOA->ODR = on1;
  GPIOA->ODR = on1;


  GPIOA->ODR = off1;
  GPIOA->ODR = off1;
  GPIOA->ODR = off1;
  GPIOA->ODR = off1;
  GPIOA->ODR = off1;
  GPIOA->ODR = off1;
  GPIOA->ODR = off1;
  GPIOA->ODR = off1;
  GPIOA->ODR = off1;
  GPIOA->ODR = off1;
  GPIOA->ODR = off1;
  GPIOA->ODR = off1;
  GPIOA->ODR = off1;
  GPIOA->ODR = off1;
  GPIOA->ODR = off1;
  GPIOA->ODR = off1;
  GPIOA->ODR = off1;

  GPIOA->ODR = off1;
  //GPIOA->ODR = off1;
  //GPIOA->ODR = off1;
  //GPIOA->ODR = off1;
  //GPIOA->ODR = off1;
  //GPIOA->ODR = off1;
  //GPIOA->ODR = off1;

  //GPIOA->ODR = off1;
  //GPIOA->ODR = off1;
}  //0.3us


// 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
void bit_on1() {
  //1us 800khz
  GPIOA->ODR = on1;
  GPIOA->ODR = on1;
  GPIOA->ODR = on1;
  GPIOA->ODR = on1;
  GPIOA->ODR = on1;
  GPIOA->ODR = on1;
  GPIOA->ODR = on1;
  GPIOA->ODR = on1;
  GPIOA->ODR = on1;
  GPIOA->ODR = on1;
  GPIOA->ODR = on1;
  GPIOA->ODR = on1;
  GPIOA->ODR = on1;
  GPIOA->ODR = on1;
  GPIOA->ODR = on1;
  GPIOA->ODR = on1;
  GPIOA->ODR = on1;

  GPIOA->ODR = on1;
  GPIOA->ODR = on1;
  GPIOA->ODR = on1;
  GPIOA->ODR = on1;
  GPIOA->ODR = on1;
  GPIOA->ODR = on1;
  GPIOA->ODR = on1;

  GPIOA->ODR = on1;
  GPIOA->ODR = on1;


  GPIOA->ODR = off1;

  GPIOA->ODR = off1;
  GPIOA->ODR = off1;
  //GPIOA->ODR = off1;
  //GPIOA->ODR = off1;
  //GPIOA->ODR = off1;
  //GPIOA->ODR = off1;
  //GPIOA->ODR = off1;
  //GPIOA->ODR = off1;
  //GPIOA->ODR = off1;
  //GPIOA->ODR = off1;
}  //1us