stm32 dac8560 代码
时间: 2023-09-07 08:14:47 浏览: 44
以下是 DAC8560 的初始化和输出代码示例,可以根据自己的需求进行修改:
```c
#include "stm32f4xx.h"
#define DAC8560_CS_LOW() GPIO_ResetBits(GPIOB, GPIO_Pin_12)
#define DAC8560_CS_HIGH() GPIO_SetBits(GPIOB, GPIO_Pin_12)
void DAC8560_Init(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
SPI_InitTypeDef SPI_InitStructure;
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOB, ENABLE);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12; // CS
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
GPIO_Init(GPIOB, &GPIO_InitStructure);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_SPI1, ENABLE);
SPI_InitStructure.SPI_Direction = SPI_Direction_1Line_Tx;
SPI_InitStructure.SPI_Mode = SPI_Mode_Master;
SPI_InitStructure.SPI_DataSize = SPI_DataSize_16b;
SPI_InitStructure.SPI_CPOL = SPI_CPOL_Low;
SPI_InitStructure.SPI_CPHA = SPI_CPHA_1Edge;
SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;
SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_8;
SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;
SPI_Init(SPI1, &SPI_InitStructure);
SPI_Cmd(SPI1, ENABLE);
}
void DAC8560_Output(uint16_t value)
{
uint16_t tx_data;
tx_data = ((value & 0xfff) << 2) | 0x3000; // 设置 DAC 输出值
DAC8560_CS_LOW();
SPI_I2S_SendData(SPI1, tx_data);
while (SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_TXE) == RESET);
while (SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_BSY) == SET);
DAC8560_CS_HIGH();
}
```
在主函数中调用 `DAC8560_Init()` 进行初始化后,可以使用 `DAC8560_Output(value)` 函数输出 DAC 值。其中 `value` 的取值范围为 0~4095。