js方波、三角波、斜波、正弦波数据生成

/* DEPTH 256  数据深度，即存储单元的个数WIDTH 1  存储单元的宽度 MODE 1  1:正弦波   2：三角波   3：斜坡   4：方波 maxwords 65535  最大值 */waveCreate(DEPTH, WIDTH, MODE, maxwords) {let arr = [];let temp = 0;for (let i = 0; i < DEPTH; i++) {switch (MODE) {case 1: //正弦波{temp = ((maxwords / 2) * Math.sin(2 * Math.PI * i / DEPTH) + maxwords / 2);break;}case 2: //三角波{let k = 2 * maxwords / DEPTH;if ((i % DEPTH) < DEPTH / 2) {temp += k;} else temp -= k;break;}case 3: //斜坡{let k = (maxwords - 1) / (DEPTH - 1);temp += k;if (temp >= maxwords) temp -= maxwords;break;}case 4: //方波{if ((i % DEPTH) <= (DEPTH / 2))temp = maxwords;elsetemp = 0;break;}default: {break;}}arr.push(temp);} //end forreturn arr;},

调用结果

let data = this.waveCreate(256, 1, 1, 65535);

let data = this.waveCreate(256, 1, 2, 65535);

let data = this.waveCreate(256, 1, 3, 65535);

let data = this.waveCreate(256, 1, 4, 65535);