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软件iic测试成功

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kevin
2021-10-25 00:33:34 +08:00
parent 21c127e2b9
commit 39a9350cd1
10 changed files with 7082 additions and 6854 deletions
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my_software/eeprom.c
+72 -8
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@@ -9,16 +9,80 @@
#include "eeprom.h"
#include "iic.h"
void EEPROM_READ_BATY(uint16_t IN_DEVICE_ADD,char *DATAS,uint16_t LONG)
//在AT24CXX指定地址读出一个数据
//ReadAddr:开始读数的地址
//返回值 :读到的数据
uint8_t AT24CXX_ReadOneByte(uint16_t ReadAddr)
{
IIC_READ_DATE(EEPROM_ADDRESS,IN_DEVICE_ADD,DATAS,LONG);
uint8_t temp=0;
IIC_Start();
if(EE_TYPE>AT24C16)
{
IIC_Send_Byte(0XA0); //发送写命令
IIC_Wait_Ack();
IIC_Send_Byte(ReadAddr>>8);//发送高地址
IIC_Wait_Ack();
}else IIC_Send_Byte(0XA0+((ReadAddr/256)<<1)); //发送器件地址0XA0,写数据
IIC_Wait_Ack();
IIC_Send_Byte(ReadAddr%256); //发送低地址
IIC_Wait_Ack();
IIC_Start();
IIC_Send_Byte(0XA1); //进入接收模式
IIC_Wait_Ack();
temp=IIC_Read_Byte(0);
IIC_Stop();//产生一个停止条件
return temp;
}
//在AT24CXX指定地址写入一个数据
//WriteAddr :写入数据的目的地址
//DataToWrite:要写入的数据
void AT24CXX_WriteOneByte(uint16_t WriteAddr,uint8_t DataToWrite)
{
IIC_Start();
if(EE_TYPE>AT24C16)
{
IIC_Send_Byte(0XA0); //发送写命令
IIC_Wait_Ack();
IIC_Send_Byte(WriteAddr>>8);//发送高地址
}else
{
IIC_Send_Byte(0XA0+((WriteAddr/256)<<1)); //发送器件地址0XA0,写数据
}
IIC_Wait_Ack();
IIC_Send_Byte(WriteAddr%256); //发送低地址
IIC_Wait_Ack();
IIC_Send_Byte(DataToWrite); //发送字节
IIC_Wait_Ack();
IIC_Stop();//产生一个停止条件
}
void EEPROM_WRITE_BATY(uint16_t IN_DEVICE_ADD,char *DATAS,uint16_t LONG)
//在AT24CXX里面的指定地址开始读出指定个数的数据
//ReadAddr :开始读出的地址 对24c02为0~255
//pBuffer :数据数组首地址
//NumToRead:要读出数据的个数
void AT24CXX_Read(uint16_t ReadAddr,uint8_t *pBuffer,uint16_t NumToRead)
{
IIC_SAND_DATE(EEPROM_ADDRESS,IN_DEVICE_ADD,DATAS,LONG);
while(NumToRead)
{
*pBuffer++=AT24CXX_ReadOneByte(ReadAddr++);
NumToRead--;
}
}
//在AT24CXX里面的指定地址开始写入指定个数的数据
//WriteAddr :开始写入的地址 对24c02为0~255
//pBuffer :数据数组首地址
//NumToWrite:要写入数据的个数
void AT24CXX_Write(uint16_t WriteAddr,uint8_t *pBuffer,uint16_t NumToWrite)
{
while(NumToWrite--)
{
AT24CXX_WriteOneByte(WriteAddr,*pBuffer);
WriteAddr++;
pBuffer++;
}
}
my_software/eeprom.h
+19 -2
View File
@@ -12,7 +12,24 @@
#define EEPROM_ADDRESS 0xa0
void EEPROM_READ_BATY(uint16_t IN_DEVICE_ADD,char *DATAS,uint16_t LONG);
void EEPROM_WRITE_BATY(uint16_t IN_DEVICE_ADD,char *DATAS,uint16_t LONG);
#define AT24C01 127
#define AT24C02 255
#define AT24C04 511
#define AT24C08 1023
#define AT24C16 2047
#define AT24C32 4095
#define AT24C64 8191
#define AT24C128 16383
#define AT24C256 32767
#define EE_TYPE AT24C02
uint8_t AT24CXX_ReadOneByte(uint16_t ReadAddr); //指定地址读取一个字节
void AT24CXX_WriteOneByte(uint16_t WriteAddr,uint8_t DataToWrite); //指定地址写入一个字节
void AT24CXX_Write(uint16_t WriteAddr,uint8_t *pBuffer,uint16_t NumToWrite); //从指定地址开始写入指定长度的数据
void AT24CXX_Read(uint16_t ReadAddr,uint8_t *pBuffer,uint16_t NumToRead); //从指定地址开始读出指定长度的数据
#endif /* EEPROM_H_ */
my_software/iic.c
+115 -88
View File
@@ -11,121 +11,148 @@
#define iic_scl(x) HAL_GPIO_WritePin(iic_scl_GPIO_Port, iic_scl_Pin, x)
#define read_iic_sda HAL_GPIO_ReadPin(iic_sda_GPIO_Port, iic_sda_Pin)
#define IIC_SDA_SET iic_sda(1)
#define IIC_SCL_SET iic_scl(1)
#define IIC_SDA_CLR iic_sda(0)
#define IIC_SCL_CLR iic_scl(0)
#define SDA_OUT() change_io_function(iic_sda_GPIO_Port, iic_sda_Pin,0)
#define SDA_IN() change_io_function(iic_sda_GPIO_Port, iic_sda_Pin,1)
#define READ_SDA read_iic_sda
void iic_start()
//产生IIC起始信号
void IIC_Start(void)
{
iic_sda(1);
iic_scl(1);
iic_sda(0);
iic_scl(0);
SDA_OUT(); //sda线输出
IIC_SDA_SET;
IIC_SCL_SET;
IIC_SDA_CLR;//START:when CLK is high,DATA change form high to low
IIC_SCL_CLR;//钳住I2C总线，准备发送或接收数据
}
void iic_stop()
//产生IIC停止信号
void IIC_Stop(void)
{
iic_sda(0);
iic_scl(1);
iic_sda(1);
SDA_OUT();//sda线输出
IIC_SCL_CLR;
IIC_SDA_CLR;//STOP:when CLK is high DATA change form low to high
IIC_SCL_SET;
IIC_SDA_SET;//发送I2C总线结束信号
}
void iic_ack()
//等待应答信号到来
//返回值：1，接收应答失败
// 0，接收应答成功
uint8_t IIC_Wait_Ack(void)
{
iic_scl(0);
iic_sda(0);
iic_scl(1);
iic_scl(0);
}
char iic_wait_ack()
{
int a=3000;
iic_scl(1);
iic_sda(1);
change_io_function(iic_sda_GPIO_Port, iic_sda_Pin,1);
// while(read_iic_sda)
// {
// a--;
// if(a==0)
// {
// iic_stop();
// return 1;
// }
// }
HAL_Delay(1);
change_io_function(iic_sda_GPIO_Port, iic_sda_Pin,0);
uint8_t ucErrTime=0;
SDA_IN(); //SDA设置为输入
IIC_SDA_SET;
IIC_SCL_SET;
while(READ_SDA)
{
ucErrTime++;
if(ucErrTime>250)
{
IIC_Stop();
return 1;
}
}
IIC_SCL_CLR;//时钟输出0
return 0;
}
void IIC_Write_Byte(unsigned char IIC_Byte)
//产生ACK应答
void IIC_Ack(void)
{
iic_scl(0);
for(unsigned char i=0;i<8;i++)
{
if(IIC_Byte & 0x80)
{
iic_sda(1);
}else
{
iic_sda(0);
}
IIC_Byte<<=1;
iic_scl(1);
iic_scl(0);
}
IIC_SCL_CLR;
SDA_OUT();
IIC_SDA_CLR;
IIC_SCL_SET;
IIC_SCL_CLR;
}
unsigned char IIC_Read_Byte()
//不产生ACK应答
void IIC_NAck(void)
{
unsigned char k=0;
iic_scl(0);
iic_sda(1);
change_io_function(iic_sda_GPIO_Port, iic_sda_Pin,1);
for(unsigned char i=0; i<8; i++)
{
iic_scl(1);
k<<=1;
if(read_iic_sda==1)
{
k|=0x01;
}
iic_scl(0);
}
change_io_function(iic_sda_GPIO_Port, iic_sda_Pin,0);
return(k);
IIC_SCL_CLR;
SDA_OUT();
IIC_SDA_SET;
IIC_SCL_SET;
IIC_SCL_CLR;
}
//IIC发送一个字节
//返回从机有无应答
//1，有应答
//0，无应答
void IIC_Send_Byte(uint8_t txd)
{
uint8_t t;
SDA_OUT();
IIC_SCL_CLR;//拉低时钟开始数据传输
for(t=0;t<8;t++)
{
//IIC_SDA=(txd&0x80)>>7;
if((txd&0x80)>>7)
IIC_SDA_SET;
else
IIC_SDA_CLR;
txd<<=1;
IIC_SCL_SET;
IIC_SCL_CLR;
}
}
//读1个字节，ack=1时，发送ACK，ack=0，发送nACK
uint8_t IIC_Read_Byte(unsigned char ack)
{
unsigned char i,receive=0;
SDA_IN();//SDA设置为输入
for(i=0;i<8;i++ )
{
IIC_SCL_CLR;
IIC_SCL_SET;
receive<<=1;
if(READ_SDA)receive++;
}
if (!ack)
IIC_NAck();//发送nACK
else
IIC_Ack(); //发送ACK
return receive;
}
void IIC_SAND_DATE(unsigned char DEVICE_ADD,unsigned char IN_DEVICE_ADD,char *DATAS,uint16_t LONG)
{
iic_start();
IIC_Write_Byte(DEVICE_ADD);
if(iic_wait_ack()){return;}
IIC_Write_Byte(IN_DEVICE_ADD);
if(iic_wait_ack()){return;}
IIC_Start();
IIC_Send_Byte(DEVICE_ADD);
if(IIC_Wait_Ack()){return;}
IIC_Send_Byte(IN_DEVICE_ADD);
if(IIC_Wait_Ack()){return;}
for(int a=0;a<LONG;a++)
{
IIC_Write_Byte(*DATAS);
IIC_Send_Byte(*DATAS);
DATAS++;
}
if(iic_wait_ack()){return;}
iic_stop();
if(IIC_Wait_Ack()){return;}
IIC_Stop();
}
void IIC_READ_DATE(unsigned char DEVICE_ADD,unsigned char IN_DEVICE_ADD,char *DATAS,uint16_t LONG)
{
iic_start();
IIC_Write_Byte(DEVICE_ADD);
if(iic_wait_ack()){return;}
IIC_Write_Byte(IN_DEVICE_ADD);
if(iic_wait_ack()){return;}
iic_start();
IIC_Write_Byte(DEVICE_ADD+1);
if(iic_wait_ack()){return;}
IIC_Start();
IIC_Send_Byte(DEVICE_ADD);
if(IIC_Wait_Ack()){return;}
IIC_Send_Byte(IN_DEVICE_ADD);
if(IIC_Wait_Ack()){return;}
IIC_Start();
IIC_Send_Byte(DEVICE_ADD+1);
if(IIC_Wait_Ack()){return;}
for(int a=0;a<LONG;a++)
{
*DATAS=IIC_Read_Byte();
*DATAS=IIC_Read_Byte(0);
DATAS++;
}
if(iic_wait_ack()){return;}
iic_stop();
if(IIC_Wait_Ack()){return;}
IIC_Stop();
}
my_software/iic.h
+22
View File
@@ -9,7 +9,29 @@
#define IIC_H_
#include "main.h"
//产生IIC起始信号
void IIC_Start(void);
//产生IIC停止信号
void IIC_Stop(void);
//等待应答信号到来
//返回值：1，接收应答失败
// 0，接收应答成功
uint8_t IIC_Wait_Ack(void);
//产生ACK应答
void IIC_Ack(void);
//不产生ACK应答
void IIC_NAck(void);
//IIC发送一个字节
//返回从机有无应答
//1，有应答
//0，无应答
void IIC_Send_Byte(uint8_t txd);
//读1个字节，ack=1时，发送ACK，ack=0，发送nACK
uint8_t IIC_Read_Byte(unsigned char ack);
void IIC_SAND_DATE(unsigned char DEVICE_ADD,unsigned char IN_DEVICE_ADD,char *DATAS,uint16_t LONG);
void IIC_READ_DATE(unsigned char DEVICE_ADD,unsigned char IN_DEVICE_ADD,char *DATAS,uint16_t LONG);
#endif /* IIC_H_ */
my_software/my_code.c
+2 -2
View File
@@ -265,9 +265,9 @@ void my_code()
r480_init();
config.begin=18;
EEPROM_WRITE_BATY(8,(char *)&config,sizeof(config_setting));
AT24CXX_Write(8,(char *)&config,sizeof(config_setting));
config.begin=1;
EEPROM_READ_BATY(8,(char *)&config,sizeof(config_setting));
AT24CXX_Read(8,(char *)&config,sizeof(config_setting));
while(1)