【国民技术M4内核热销款N32G45XVL评估】第三篇 DAC输出双路三角波信号

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【国民技术M4内核热销款N32G45XVL评估】第三篇 DAC输出双路三角波信号 [复制链接]

 

春节假期里找了点时间搞一下板子。

看了下DAC模块的使用，做了一个使用DAC输出双路三角波信号的例子。

 

下面就直接上代码和波形图了。

	GPIO_InitType GPIO_InitStructure;
	
	SetSysClockToPLL(144000000, SYSCLK_PLLSRC_HSE);
	
    /* Once the DAC channel is enabled, the corresponding GPIO pin is automatically
       connected to the DAC converter. In order to avoid parasitic consumption,
       the GPIO pin should be configured in analog */

    /* GPIOA Periph clock enable */
    RCC_EnableAPB2PeriphClk(RCC_APB2_PERIPH_GPIOA, ENABLE);
    /* Once the DAC channel is enabled, the corresponding GPIO pin is automatically
       connected to the DAC converter. In order to avoid parasitic consumption,
       the GPIO pin should be configured in analog */
    GPIO_InitStructure.Pin       = GPIO_PIN_4 | GPIO_PIN_5;
	GPIO_InitStructure.GPIO_Speed = GPIO_Speed_10MHz;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
    GPIO_InitPeripheral(GPIOA, &GPIO_InitStructure);
	
	RCC_EnableAPB1PeriphClk(RCC_APB1_PERIPH_DAC, ENABLE);
	DAC->CTRL = 0x0FBF0FBF;
	DAC->CTRL = 0x0FBF0FBF;
	DAC->SOTTR = 0X3;
	DAC->DR12DCH = 0;//500<<16 | 500;

    while (1)
    {
		DAC->SOTTR = 0X3;
    }

 

Jacktang

结果看最后的双路三角波信号波形挺好