write24c16(0xaa,0x55);
程序在这里停住，以下是我的全部代码：
#include "stm32f10x.h"
#include <stdio.h>
#define I2C1_SLAVE_ADDRESS7 0x30
#define AT24C02_Addr 0xA0
ErrorStatus HSEStartUpStatus;
USART_InitTypeDef USART_InitStructure;
void RCC_Configuration(void);
void NVIC_Configuration(void);
void GPIO_Configuration(void);
void USART_Configuration(void);
void I2C_Configuration(void);
ErrorStatus I2C_24c16_Status(void);
void I2C_Standby_24C(void);
u8 temp3=0xaa;
u8 temp4;
void write24c16(u8 nddr,u8 byte);
u8 read24c16(u8 nddr);
void delay(u32 z);
#ifdef __GNUC__
/* With GCC/RAISONANCE, small printf (option LD Linker->Libraries->Small printf
set to 'Yes') calls __io_putchar() */
#define PUTCHAR_PROTOTYPE int __io_putchar(int ch)
#else
#define PUTCHAR_PROTOTYPE int fputc(int ch, FILE *f)
#endif /* __GNUC__ */
int main()
{
RCC_Configuration();
NVIC_Configuration();
GPIO_Configuration();
USART_Configuration();
I2C_Configuration();
while (1)
{
GPIO_ResetBits(GPIOD, GPIO_Pin_2);
delay(1000);
write24c16(0xaa,0x55);
delay(1000);
GPIO_SetBits(GPIOD, GPIO_Pin_2);
temp4=read24c16(0xaa);
delay(1000);
printf("\n\r神舟III号 串口1测试程序%x\n",temp4);
GPIO_ResetBits(GPIOA, GPIO_Pin_8);
delay(1000);
GPIO_SetBits(GPIOA, GPIO_Pin_8);
delay(1000);
}
}
void GPIO_Configuration(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOD, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11 | GPIO_Pin_12;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_OD;
GPIO_Init(GPIOC, &GPIO_InitStructure);
}
void USART_Configuration(void)
{
USART_InitStructure.USART_BaudRate = 115200;
USART_InitStructure.USART_WordLength = USART_WordLength_8b;/*设置数据位为8*/
USART_InitStructure.USART_StopBits = USART_StopBits_1; /*设置停止位为1位*/
USART_InitStructure.USART_Parity = USART_Parity_No; /*无奇偶校验*/
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;/*无硬件流控*/
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx; /*发送和接收*/
USART_Init(USART1, &USART_InitStructure);
USART_Cmd(USART1, ENABLE);
}
void RCC_Configuration(void)
{
RCC_DeInit(); // RCC system reset(for debug purpose)
RCC_HSEConfig(RCC_HSE_ON); // Enable HSE
HSEStartUpStatus = RCC_WaitForHSEStartUp(); // Wait till HSE is ready
if (HSEStartUpStatus == SUCCESS)
{
RCC_HCLKConfig(RCC_SYSCLK_Div1);
RCC_PCLK2Config(RCC_HCLK_Div1);
RCC_PCLK1Config(RCC_HCLK_Div2);
FLASH_SetLatency(FLASH_Latency_2); // Flash 2 wait state
FLASH_PrefetchBufferCmd(FLASH_PrefetchBuffer_Enable); // Enable Prefetch Buffer
RCC_PLLConfig(RCC_PLLSource_HSE_Div1, RCC_PLLMul_9); // PLLCLK = 8MHz * 9 = 72 MHz
RCC_PLLCmd(ENABLE); // Enable PLL
while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET)
{
; // Wait till PLL is ready
}
RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK); // Select PLL as system clock source
while (RCC_GetSYSCLKSource()!= 0x08) // Wait till PLL is used as system clock source
{
;
}
}
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA|RCC_APB2Periph_GPIOC|RCC_APB2Periph_GPIOD,ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1,ENABLE);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_I2C1,ENABLE);
}
void I2C_Configuration(void)
{
I2C_InitTypeDef I2C_InitStructure;
I2C_InitStructure.I2C_Mode = I2C_Mode_I2C;
I2C_InitStructure.I2C_DutyCycle = I2C_DutyCycle_2;
I2C_InitStructure.I2C_OwnAddress1 = I2C1_SLAVE_ADDRESS7;
I2C_InitStructure.I2C_Ack = I2C_Ack_Enable;
I2C_InitStructure.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit;
I2C_InitStructure.I2C_ClockSpeed = 100000;
I2C_Cmd(I2C1, ENABLE);
I2C_Init(I2C1, &I2C_InitStructure);
I2C_AcknowledgeConfig(I2C1, ENABLE);
}
void NVIC_Configuration(void)
{
#ifdef VECT_TAB_RAM
NVIC_SetVectorTable(NVIC_VectTab_RAM,0x0);
#else
NVIC_SetVectorTable(NVIC_VectTab_FLASH,0x0);
#endif
}
void delay(u32 z)
{
u32 x,y;
for(x=z;x>0;x--)
for(y=1000;y>0;y--);
}
void write24c16(u8 nddr,u8 byte)
{
while(I2C_GetFlagStatus(I2C1, I2C_FLAG_BUSY));
I2C_GenerateSTART(I2C1, ENABLE);
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECT));
I2C_Send7bitAddress(I2C1, AT24C02_Addr, I2C_Direction_Transmitter);
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED));
I2C_SendData(I2C1, nddr);
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED))/* EV8 */
{
}
I2C_SendData(I2C1, byte);
I2C_GenerateSTOP(I2C1, ENABLE);
I2C_Standby_24C();
delay(100);
}
u8 read24c16(u8 nddr)
{
u8 temp;
while(I2C_GetFlagStatus(I2C1, I2C_FLAG_BUSY));
I2C_GenerateSTART(I2C1, ENABLE);
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECT));
I2C_Send7bitAddress(I2C1, AT24C02_Addr, I2C_Direction_Transmitter);
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED));
I2C_Cmd(I2C1, ENABLE);
I2C_SendData(I2C1, nddr);
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, AT24C02_Addr, I2C_Direction_Receiver);
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_RECEIVER_MODE_SELECTED)){;}
temp=I2C_ReceiveData(I2C1);
I2C_AcknowledgeConfig(I2C1, ENABLE);
return temp;
}
PUTCHAR_PROTOTYPE
{
/* Place your implementation of fputc here */
/* e.g. write a character to the USART */
USART_SendData(USART1, (uint8_t) ch); /*发送一个字符函数*/
/* Loop until the end of transmission */
while (USART_GetFlagStatus(USART1, USART_FLAG_TC) == RESET)/*等待发送完成*/
{
;
}
return ch;
}
void I2C_Standby_24C(void) //判忙
{
vu16 SR1_Tmp;
do
{
/*起始位*/
I2C_GenerateSTART(I2C1, ENABLE);
/*读SR1*/
SR1_Tmp = I2C_ReadRegister(I2C1, I2C_Register_SR1);
/*器件地址(写)*/
#ifdef AT24C01A
I2C_Send7bitAddress(I2C1, EEPROM_ADDR, I2C_Direction_Transmitter);
#else
I2C_Send7bitAddress(I2C1, 0, I2C_Direction_Transmitter);
#endif
}while(!(I2C_ReadRegister(I2C1, I2C_Register_SR1) & 0x0002));
/**/
I2C_ClearFlag(I2C1, I2C_FLAG_AF);
/*停止位*/
I2C_GenerateSTOP(I2C1, ENABLE);
} |
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