STM32G031とWS2812B(160個、未定?)を単一の値で光らせる。(ON OFF あり)


x NOP (ノップ?)やループでタイミングを取らずにダイレクト

目的
ぞくに言う「テープLED」「NeoPixel」「5050」を光らせる
GPIOのテスト


![o_con21.jpg](https://qiita-image-store.s3.ap-northeast-1.amazonaws.com/0/840352/c1cbb567-7305-2968-c87b-358dfddd2595.jpeg)



```c++


#define G0  0
#define R0  12
#define B0  0

char l[160*3]; //max160 led

//             12345678   12345678   12345678   12345678
int b8[8] = {0b10000000,0b01000000,0b00100000,0b00010000,
             0b00001000,0b00000100,0b00000010,0b00000001  };

void bit_on1();
void bit_off1();

//RGB_LEDにデータをn回分送る
int ws_led(int num1)
{
  int on_off;

  //num1で指定された分だけループする
  for(int ii=0;ii<num1;ii++){

    //8ビット分送る
    for(int jj=0;jj<8;jj++){

      on_off = l[ii] & b8[jj];

      if( on_off == 0 ){
        bit_off1(); //ビットが0
      } else {
        bit_on1(); //ビットが1 
      }//endif

    }//for 8bit

  }//for

  return(0);
}//ws_led

//RGB_LEDに0データをn回分送る
int ws_led_cl(int num1)
{

  //num1で指定された分だけループする
  for(int ii=0;ii<(num1*8);ii++){
    bit_off1(); //ビットが0
  }//for

  return(0);
}//ws_led

void setup() {

  //GPIOの初期化
  pinMode(PA8, OUTPUT);
  pinMode(PB7, INPUT_PULLUP);

  //状態を1づつ進める
  for(int ii=0;ii<160;ii++){

    //1個のデータをセット  
    l[(ii*3)+0] = G0;
    l[(ii*3)+1] = R0;
    l[(ii*3)+2] = B0;

  }//for

}//setup

void loop() {

  if( digitalRead(PB7) == 0 ){
    //ws2812bへ0データを送る
    ws_led_cl(160*3);
  }else{
    //ws2812bへデータを送る
    ws_led(160*3);
  }  

  //0.1秒待つ
  delay(100);

}//loop


                  //      5432109876543210
int on1  = GPIOA->ODR | 0b0000000100000000;
int off1 = GPIOA->ODR & 0b1111111011111111;

// 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 = 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;
    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 = 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 = 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;
}//1us




```