STM32F103驱动DAC7512
时间: 2023-06-29 22:03:15 浏览: 145
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首先,需要连接STM32F103和DAC7512。可以使用SPI或者I2C接口进行连接。
接下来,需要配置STM32F103的SPI或者I2C接口,并且设置DAC7512的控制寄存器。具体的配置过程如下:
1. 配置SPI或者I2C接口。
2. 配置DAC7512的控制寄存器,包括输出电压范围、输出电压值等参数。
3. 通过SPI或者I2C接口向DAC7512发送设置命令,配置DAC7512的控制寄存器。
4. 发送数据到DAC7512,控制输出电压。
下面是一个简单的示例代码,使用SPI接口驱动DAC7512:
```c
#include "stm32f10x.h"
#define SPI_CS_LOW() GPIO_ResetBits(GPIOB, GPIO_Pin_12)
#define SPI_CS_HIGH() GPIO_SetBits(GPIOB, GPIO_Pin_12)
void SPI_Configuration(void)
{
SPI_InitTypeDef spi;
GPIO_InitTypeDef gpio;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB | RCC_APB2Periph_SPI2, ENABLE);
gpio.GPIO_Pin = GPIO_Pin_13 | GPIO_Pin_14 | GPIO_Pin_15;
gpio.GPIO_Speed = GPIO_Speed_50MHz;
gpio.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_Init(GPIOB, &gpio);
gpio.GPIO_Pin = GPIO_Pin_12;
gpio.GPIO_Speed = GPIO_Speed_50MHz;
gpio.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_Init(GPIOB, &gpio);
SPI_Cmd(SPI2, DISABLE);
spi.SPI_Direction = SPI_Direction_1Line_Tx;
spi.SPI_Mode = SPI_Mode_Master;
spi.SPI_DataSize = SPI_DataSize_16b;
spi.SPI_CPOL = SPI_CPOL_Low;
spi.SPI_CPHA = SPI_CPHA_1Edge;
spi.SPI_NSS = SPI_NSS_Soft;
spi.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_8;
spi.SPI_FirstBit = SPI_FirstBit_MSB;
SPI_Init(SPI2, &spi);
SPI_Cmd(SPI2, ENABLE);
}
void DAC7512_Configuration(void)
{
uint16_t data;
data = 0x8000; // set output voltage range to +/-10V
SPI_CS_LOW();
SPI_I2S_SendData(SPI2, data);
while (SPI_I2S_GetFlagStatus(SPI2, SPI_I2S_FLAG_BSY) == SET);
SPI_CS_HIGH();
data = 0x7FFF; // set output voltage to 0V
SPI_CS_LOW();
SPI_I2S_SendData(SPI2, data);
while (SPI_I2S_GetFlagStatus(SPI2, SPI_I2S_FLAG_BSY) == SET);
SPI_CS_HIGH();
}
void DAC7512_SetOutputVoltage(uint16_t voltage)
{
uint16_t data;
data = 0x8000 | ((voltage & 0x0FFF) << 2);
SPI_CS_LOW();
SPI_I2S_SendData(SPI2, data);
while (SPI_I2S_GetFlagStatus(SPI2, SPI_I2S_FLAG_BSY) == SET);
SPI_CS_HIGH();
}
int main(void)
{
SPI_Configuration();
DAC7512_Configuration();
while (1)
{
DAC7512_SetOutputVoltage(0x7FF);
Delay(1000);
DAC7512_SetOutputVoltage(0x3FF);
Delay(1000);
DAC7512_SetOutputVoltage(0xFFF);
Delay(1000);
DAC7512_SetOutputVoltage(0x000);
Delay(1000);
}
return 0;
}
```
需要注意的是,以上代码仅供参考,具体的配置和使用过程需要根据实际情况进行调整。同时,需要根据DAC7512的规格书来确定控制寄存器的设置方法和数据格式。
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