stm32f103c8t6获取ds2438的电压数据的程序怎么写
时间: 2023-06-11 17:04:46 浏览: 43
你可以使用STM32的GPIO口连接DS2438芯片,通过读取芯片内部寄存器中的电压值来获取电压数据。以下是一个简单的STM32F103C8T6获取DS2438电压数据的程序示例:
```
#include "stm32f10x.h"
int main(void)
{
// 初始化GPIO口
GPIO_InitTypeDef GPIO_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_Init(GPIOA, &GPIO_InitStructure);
// 初始化I2C
I2C_InitTypeDef I2C_InitStructure;
RCC_APB1PeriphClockCmd(RCC_APB1Periph_I2C1, ENABLE);
I2C_InitStructure.I2C_Mode = I2C_Mode_I2C;
I2C_InitStructure.I2C_DutyCycle = I2C_DutyCycle_2;
I2C_InitStructure.I2C_OwnAddress1 = 0;
I2C_InitStructure.I2C_Ack = I2C_Ack_Enable;
I2C_InitStructure.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit;
I2C_InitStructure.I2C_ClockSpeed = 400000;
I2C_Init(I2C1, &I2C_InitStructure);
I2C_Cmd(I2C1, ENABLE);
// 读取DS2438电压数据
uint8_t writeBuffer[2] = {0xA5, 0x00};
uint8_t readBuffer[5] = {0};
while (1)
{
// 写入指令
I2C_GenerateSTART(I2C1, ENABLE);
while (!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECT));
I2C_Send7bitAddress(I2C1, 0x2C, I2C_Direction_Transmitter);
while (!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED));
for (uint8_t i = 0; i < 2; i++)
{
I2C_SendData(I2C1, writeBuffer[i]);
while (!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED));
}
I2C_GenerateSTOP(I2C1, ENABLE);
// 读取电压数据
I2C_GenerateSTART(I2C1, ENABLE);
while (!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECT));
I2C_Send7bitAddress(I2C1, 0x2C, I2C_Direction_Receiver);
while (!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_RECEIVED));
for (uint8_t i = 0; i < 4; i++)
{
readBuffer[i] = I2C_ReceiveData(I2C1);
while (!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_RECEIVED));
}
readBuffer[4] = I2C_ReceiveData(I2C1);
I2C_GenerateSTOP(I2C1, ENABLE);
// 将数据转换为电压值
uint16_t raw = readBuffer[1] << 8 | readBuffer[0];
uint16_t voltage = raw * 2.44 / 1024;
// 显示电压值
if (GPIO_ReadInputDataBit(GPIOA, GPIO_Pin_0) == Bit_RESET)
{
printf("Voltage: %d mV\r\n", voltage);
}
}
}
```
注意:程序仅供参考,请根据实际情况进行调整和优化。
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