stm32f030c8t6关于DAC084S085 8-Bit使用SPI通信传输的驱动代码
时间: 2024-05-06 16:22:08 浏览: 10
以下是使用STM32F030C8T6与DAC084S085 8-Bit DAC芯片进行SPI通信传输的驱动代码:
```
#include "stm32f0xx.h"
#define SPI_CS_LOW() GPIO_ResetBits(GPIOA, GPIO_Pin_4)
#define SPI_CS_HIGH() GPIO_SetBits(GPIOA, GPIO_Pin_4)
void DAC_Init(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
SPI_InitTypeDef SPI_InitStructure;
// Enable GPIOA and SPI1 clocks
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA, ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_SPI1, ENABLE);
// Configure GPIOA pins for SPI1 MOSI, MISO, and SCK
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5 | GPIO_Pin_6 | GPIO_Pin_7;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
GPIO_Init(GPIOA, &GPIO_InitStructure);
// Configure GPIOA pin for DAC084S085 CS
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
GPIO_Init(GPIOA, &GPIO_InitStructure);
// Connect SPI1 pins to AF0
GPIO_PinAFConfig(GPIOA, GPIO_PinSource5, GPIO_AF_0);
GPIO_PinAFConfig(GPIOA, GPIO_PinSource6, GPIO_AF_0);
GPIO_PinAFConfig(GPIOA, GPIO_PinSource7, GPIO_AF_0);
// Configure SPI1
SPI_InitStructure.SPI_Mode = SPI_Mode_Master;
SPI_InitStructure.SPI_Direction = SPI_Direction_1Line_Tx;
SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b;
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_InitStructure.SPI_CRCPolynomial = 7;
SPI_Init(SPI1, &SPI_InitStructure);
// Enable SPI1
SPI_Cmd(SPI1, ENABLE);
// Set CS high to disable DAC084S085
SPI_CS_HIGH();
}
void DAC_Write(uint8_t value)
{
// Send 16 bits to DAC084S085
SPI_CS_LOW();
SPI_SendData8(SPI1, 0x00); // Send first byte (don't care)
SPI_SendData8(SPI1, value); // Send second byte (DAC value)
while (SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_BSY) == SET) {} // Wait for SPI transmission to complete
SPI_CS_HIGH();
}
```
在上面的代码中,我们首先初始化了GPIO和SPI外设,并定义了两个宏SPI_CS_LOW()和SPI_CS_HIGH(),用于使能和禁用DAC084S085的CS引脚。然后我们定义了两个函数DAC_Init()和DAC_Write(),分别用于初始化DAC和将一个8位数值写入DAC。
在DAC_Init()函数中,我们首先配置了GPIOA的5、6、7号引脚为SPI MOSI、MISO和SCK,同时配置了GPIOA的4号引脚为DAC084S085的CS引脚。然后我们将这三个SPI引脚与SPI1外设进行了连接,并配置了SPI1的各个参数,最后使能了SPI1。
在DAC_Write()函数中,我们首先将CS引脚拉低,然后向DAC发送一个16位的数据,其中第一个字节是无关紧要的,第二个字节是要写入DAC的8位数值。在发送完数据后,我们等待SPI传输完成,然后将CS引脚拉高。
以上就是使用STM32F030C8T6与DAC084S085 8-Bit DAC芯片进行SPI通信传输的驱动代码。