功能

DAC波形发生器

按键切换波形，正弦波、三角波、锯齿波、方波。

部分代码

cpp

const unsigned int zhengxian[101] = { 32767, 34824, 36874, 38907, 40916, 42893,
		44830, 46719, 48553, 50325, 52027, 53654, 55198, 56653, 58015, 59276,
		60434, 61481, 62416, 63233, 63931, 64505, 64954, 65276, 65470, 65534,
		65470, 65276, 64954, 64505, 63931, 63233, 62416, 61481, 60434, 59276,
		58015, 56653, 55198, 53654, 52027, 50325, 48553, 46719, 44830, 42893,
		40916, 38907, 36874, 34824, 32767, 30710, 28660, 26627, 24618, 22641,
		20704, 18815, 16981, 15209, 13507, 11880, 10336, 8881, 7519, 6258, 5100,
		4053, 3118, 2301, 1603, 1029, 580, 258, 64, 0, 64, 258, 580, 1029, 1603,
		2301, 3118, 4053, 5100, 6258, 7519, 8881, 10336, 11880, 13507, 15209,
		16981, 18815, 20704, 22641, 24618, 26627, 28660, 30710 };
const unsigned int sanjiao[101] = { 0, 1310, 2621, 3932, 5242, 6553, 7864, 9174,
		10485, 11796, 13107, 14417, 15728, 17039, 18349, 19660, 20971, 22281,
		23592, 24903, 26214, 27524, 28835, 30146, 31456, 32767, 34078, 35388,
		36699, 38010, 39321, 40631, 41942, 43253, 44563, 45874, 47185, 48495,
		49806, 51117, 52428, 53738, 55049, 56360, 57670, 58981, 60292, 61602,
		62913, 64224, 65535, 64224, 62913, 61602, 60292, 58981, 57670, 56360,
		55049, 53738, 52428, 51117, 49806, 48495, 47185, 45874, 44563, 43253,
		41942, 40631, 39321, 38010, 36699, 35388, 34078, 32767, 31456, 30146,
		28835, 27524, 26214, 24903, 23592, 22281, 20971, 19660, 18349, 17039,
		15728, 14417, 13107, 11796, 10485, 9174, 7864, 6553, 5242, 3932, 2621,
		1310 };

const unsigned int juchi[101] = { 0, 655, 1310, 1966, 2621, 3276, 3932, 4587,
		5242, 5898, 6553, 7208, 7864, 8519, 9174, 9830, 10485, 11140, 11796,
		12451, 13107, 13762, 14417, 15073, 15728, 16383, 17039, 17694, 18349,
		19005, 19660, 20315, 20971, 21626, 22281, 22937, 23592, 24247, 24903,
		25558, 26214, 26869, 27524, 28180, 28835, 29490, 30146, 30801, 31456,
		32112, 32767, 33422, 34078, 34733, 35388, 36044, 36699, 37354, 38010,
		38665, 39321, 39976, 40631, 41287, 41942, 42597, 43253, 43908, 44563,
		45219, 45874, 46529, 47185, 47840, 48495, 49151, 49806, 50461, 51117,
		51772, 52428, 53083, 53738, 54394, 55049, 55704, 56360, 57015, 57670,
		58326, 58981, 59636, 60292, 60947, 61602, 62258, 62913, 63568, 64224,
		64879 };

const unsigned int fangbo[101] = { 65535, 65535, 65535, 65535, 65535, 65535,
		65535, 65535, 65535, 65535, 65535, 65535, 65535, 65535, 65535, 65535,
		65535, 65535, 65535, 65535, 65535, 65535, 65535, 65535, 65535, 65535,
		65535, 65535, 65535, 65535, 65535, 65535, 65535, 65535, 65535, 65535,
		65535, 65535, 65535, 65535, 65535, 65535, 65535, 65535, 65535, 65535,
		65535, 65535, 65535, 65535, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
		0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
		0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };



void main(void) {

	WDTCTL = WDTPW + WDTHOLD;                 // Stop WDT

	P1DIR = 0;
	P2DIR = 0;

	BCSCTL1 = CALBC1_16MHZ; /* Set DCO to16MHz */
	DCOCTL = CALDCO_16MHZ;

	TCA6416A_Init(); /* 初始化IO扩展口 */

	/* ----提示初始化成功---- */
	PinOUT(0, 1); /* 指定0号管脚输出为0 */
	PinOUT(1, 1); /* 指定1号管脚输出为0 */
	PinOUT(2, 1); /* 指定0号管脚输出为0 */
	PinOUT(3, 1); /* 指定1号管脚输出为0 */
	PinOUT(4, 1); /* 指定0号管脚输出为0 */
	PinOUT(5, 1); /* 指定1号管脚输出为0 */
	PinOUT(6, 1); /* 指定0号管脚输出为0 */
	PinOUT(7, 1); /* 指定1号管脚输出为0 */

	HT1621_init(); /* 初始化lcd_128 */

	LCD_Clear();

	/* 定时器0 检测按键的 */
	CCTL0 = CCIE;
	TACCR0 = 3276 / 5; /* 20MS */
	TACTL = TASSEL_1 + MC_1;

	/* 定时器0 检测按键的 */
//	TA1CCTL0 = CCIE;
//	TA1CCR0 = 32 * 5; /* 1  ms */
//	TA1CTL = TASSEL_1 + MC_1;                 //up to CCR0
	DAC8411_Init(); /* 蜂鸣器AGC */

	_EINT();

	while (1) {
		PinIN();
		I2C_IODect(); /*按键检测处理 */

		//TACTL = TASSEL_1 + MC_1 + TACLR; /* 打开定时器 */
		//LPM0;

		jishu++;
		if (jishu == 100) {
			jishu = 0;
		}

		//which 决定了是什么波形
		if (which == 0) {
			write2DAC8411(zhengxian[jishu]);
		} else if (which == 1) {
			write2DAC8411(sanjiao[jishu]);
		} else if (which == 2) {
			write2DAC8411(juchi[jishu]);
		} else if (which == 3) {
			write2DAC8411(fangbo[jishu]);
		}
	}
}

/* Timer A0 interrupt service routine */
#pragma vector=TIMER0_A0_VECTOR
__interrupt void Timer_A(void) {

	//TACTL = TASSEL_1 + MC_0 + TACLR; /* 停下时钟 */
	//LPM0_EXIT;
}

/* Timer A0 interrupt service routine */
#pragma vector=TIMER1_A0_VECTOR
__interrupt void Timer1_A(void) {

}

全部代码

cpp
https://docs.qq.com/sheet/DUEdqZ2lmbmR6UVdU?tab=BB08J2