stm32+AT24C04
时间: 2023-11-09 15:46:39 浏览: 83
STM32 AT24C04是一种EEPROM(电可擦除可编程只读存储器)芯片,容量为4Kbit,相当于512字节。这个芯片与AT24C01和AT24C02芯片非常相似,但在硬件连接的地址引脚方面有所区别。AT24C04只需要2个引脚作为硬件连接的地址。在地址寻址时,使用1位作为页选择位。
对于写操作,可以使用字节写入(Byte Write)方法来写入一个字节的数据。
在读操作方面,可以进行任意地址的读取。
相关问题
stm32f407+at24c02
STM32F407和STM32F103都是ST公司的微控制器,都支持I2C通信协议。AT24C02是一种I2C串行EEPROM存储器,容量为2K位。因此,STM32F407也可以通过I2C模块读写AT24C02存储器。具体的程序实现可以参考STM32F103读写AT24C512的程序,进行相应的修改。
stm32对at24c04的读写
以下是基于STM32的I2C接口与AT24C04进行读写操作的示例代码:
```c
#include "stm32f10x.h"
#include "stm32f10x_i2c.h"
#define I2C1_OWN_ADDRESS7 0xA0
#define I2C_SPEED 100000 // I2C速度为100kHz
#define I2C_TIMEOUT 0x1000 // I2C超时时间为1s
#define I2C1_SCL_GPIO_PORT GPIOB
#define I2C1_SCL_GPIO_PIN GPIO_Pin_6
#define I2C1_SDA_GPIO_PORT GPIOB
#define I2C1_SDA_GPIO_PIN GPIO_Pin_7
void I2C1_Configuration(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
I2C_InitTypeDef I2C_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_I2C1, ENABLE);
GPIO_InitStructure.GPIO_Pin = I2C1_SCL_GPIO_PIN;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_OD;
GPIO_Init(I2C1_SCL_GPIO_PORT, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = I2C1_SDA_GPIO_PIN;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_OD;
GPIO_Init(I2C1_SDA_GPIO_PORT, &GPIO_InitStructure);
I2C_InitStructure.I2C_Mode = I2C_Mode_I2C;
I2C_InitStructure.I2C_DutyCycle = I2C_DutyCycle_2;
I2C_InitStructure.I2C_OwnAddress1 = I2C1_OWN_ADDRESS7;
I2C_InitStructure.I2C_Ack = I2C_Ack_Enable;
I2C_InitStructure.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit;
I2C_InitStructure.I2C_ClockSpeed = I2C_SPEED;
I2C_Init(I2C1, &I2C_InitStructure);
I2C_Cmd(I2C1, ENABLE);
}
int I2C1_Write(uint8_t deviceAddress, uint8_t registerAddress, uint8_t data)
{
int status = 0;
while(I2C_GetFlagStatus(I2C1, I2C_FLAG_BUSY));
I2C_GenerateSTART(I2C1, ENABLE);
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECT));
I2C_Send7bitAddress(I2C1, deviceAddress, I2C_Direction_Transmitter);
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED));
I2C_SendData(I2C1, registerAddress);
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED));
I2C_SendData(I2C1, data);
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED));
I2C_GenerateSTOP(I2C1, ENABLE);
return status;
}
int I2C1_Read(uint8_t deviceAddress, uint8_t registerAddress, uint8_t* data)
{
int status = 0;
while(I2C_GetFlagStatus(I2C1, I2C_FLAG_BUSY));
I2C_GenerateSTART(I2C1, ENABLE);
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECT));
I2C_Send7bitAddress(I2C1, deviceAddress, I2C_Direction_Transmitter);
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED));
I2C_SendData(I2C1, registerAddress);
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED));
I2C_GenerateSTART(I2C1, ENABLE);
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECT));
I2C_Send7bitAddress(I2C1, deviceAddress, I2C_Direction_Receiver);
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_RECEIVER_MODE_SELECTED));
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_RECEIVED));
*data = I2C_ReceiveData(I2C1);
I2C_AcknowledgeConfig(I2C1, DISABLE);
I2C_GenerateSTOP(I2C1, ENABLE);
return status;
}
int main(void)
{
uint8_t data = 0;
I2C1_Configuration();
// 读取AT24C04的0x01地址中的数据
I2C1_Read(0xA0, 0x01, &data);
// 向AT24C04的0x01地址中写入数据0x55
I2C1_Write(0xA0, 0x01, 0x55);
while(1);
}
```
注意:以上代码仅供参考,具体实现方式需要根据实际情况进行调整。
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