你是一名STM32的软件开发工程师要求你用STM32F104VE完成下面的题目用标准库函数方式使用IIC1用页写指定地址从0x00连续写入A-Z到AT24C02并读取写出代码
以下是使用STM32标准库函数方式,使用IIC1,用页写指定地址从0x00连续写入'A'-'Z'到AT24C02,并读取的代码:
#include "stm32f10x.h"
#include "stm32f10x_i2c.h"
#define AT24C02_ADDRESS 0xA0
void i2c_init(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 = GPIO_Pin_6 | GPIO_Pin_7;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_OD;
GPIO_Init(GPIOB, &GPIO_InitStructure);
I2C_InitStructure.I2C_Mode = I2C_Mode_I2C;
I2C_InitStructure.I2C_DutyCycle = I2C_DutyCycle_2;
I2C_InitStructure.I2C_OwnAddress1 = 0x00;
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);
}
void i2c_write(uint8_t address, uint8_t* data, uint8_t length)
{
while (I2C_GetFlagStatus(I2C1, I2C_FLAG_BUSY))
{
}
I2C_GenerateSTART(I2C1, ENABLE);
while (!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECT))
{
}
I2C_Send7bitAddress(I2C1, address, I2C_Direction_Transmitter);
while (!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED))
{
}
while (length--)
{
I2C_SendData(I2C1, *data++);
while (!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_TRANSMITTED))
{
}
}
I2C_GenerateSTOP(I2C1, ENABLE);
}
void i2c_read(uint8_t address, uint8_t* data, uint8_t length)
{
while (I2C_GetFlagStatus(I2C1, I2C_FLAG_BUSY))
{
}
I2C_GenerateSTART(I2C1, ENABLE);
while (!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECT))
{
}
I2C_Send7bitAddress(I2C1, address, I2C_Direction_Receiver);
while (!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_RECEIVER_MODE_SELECTED))
{
}
while (length--)
{
if (length == 0)
{
I2C_AcknowledgeConfig(I2C1, DISABLE);
I2C_GenerateSTOP(I2C1, ENABLE);
}
while (!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_BYTE_RECEIVED))
{
}
*data++ = I2C_ReceiveData(I2C1);
}
I2C_AcknowledgeConfig(I2C1, ENABLE);
}
int main(void)
{
uint8_t data[26];
uint8_t write_data[26];
uint8_t i;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE);
GPIO_InitTypeDef GPIO_InitStructure;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_13;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_Init(GPIOC, &GPIO_InitStructure);
i2c_init();
for (i = 0; i < 26; i++)
{
write_data[i] = 'A' + i;
}
i2c_write(AT24C02_ADDRESS, write_data, 26);
i2c_read(AT24C02_ADDRESS, data, 26);
for (i = 0; i < 26; i++)
{
if (data[i] != 'A' + i)
{
GPIO_WriteBit(GPIOC, GPIO_Pin_13, Bit_SET);
while (1)
{
}
}
}
GPIO_WriteBit(GPIOC, GPIO_Pin_13, Bit_RESET);
while (1)
{
}
}
原文地址: https://www.cveoy.top/t/topic/DCj 著作权归作者所有。请勿转载和采集!