at24c08_nonlib.c File Reference

#include "fw_hal.h"

Go to the source code of this file.

Macros
#define	AT24C_ADDR   0xA0

Functions
void	Wait ()
void	Start ()
void	SendData (char dat)
void	RecvACK ()
char	RecvData ()
void	SendACK ()
void	SendNAK ()
void	Stop ()
void	I2C_Init (void)
void	GPIO_Init (void)
int	main (void)

Macro Definition Documentation

AT24C_ADDR

#define AT24C_ADDR   0xA0

Definition at line 27 of file at24c08_nonlib.c.

Function Documentation

GPIO_Init()

void GPIO_Init

(

void

)

Definition at line 96 of file at24c08_nonlib.c.

{
    // SDA
    GPIO_P3_SetMode(GPIO_Pin_3, GPIO_Mode_InOut_QBD);
    // SCL
    GPIO_P3_SetMode(GPIO_Pin_2, GPIO_Mode_Output_PP);
}

I2C_Init()

void I2C_Init

(

void

)

I2C clock = FOSC / 2 / (prescaler * 2 + 4)

Definition at line 82 of file at24c08_nonlib.c.

{
    // Master mode
    I2C_SetWorkMode(I2C_WorkMode_Master);
    I2C_SetClockPrescaler(0x20);
    // Switch alternative port
    I2C_SetPort(I2C_AlterPort_P32_P33);
    // Start I2C
    I2C_SetEnabled(HAL_State_ON);
}

main()

int main

(

void

)

Definition at line 104 of file at24c08_nonlib.c.

{
    uint8_t i, buf[20];
 
    SYS_SetClock();
    // UART1 configuration: baud 115200 with Timer2, 1T mode, no interrupt
    UART1_Config8bitUart(UART1_BaudSource_Timer2, HAL_State_ON, 115200);
 
    GPIO_Init();
    I2C_Init();
 
    P_SW2 |= 0x80;
    
    Start();
    SendData(AT24C_ADDR);
    RecvACK();
    SendData(0x00);
    RecvACK();
    SendData(0xAF);
    RecvACK();
    SendData(0xBF);
    RecvACK();
    SendData(0xCF);
    RecvACK();
    SendData(0xDF);
    RecvACK();
    SendData(0xEF);
    RecvACK();
    SendData(0xFF);
    RecvACK();
    Stop(); 
    SYS_Delay(50);
 
    while (1)
    {
        Start();
        SendData(AT24C_ADDR);
        RecvACK();
        SendData(0x00);
        RecvACK();
        Start();
        SendData(AT24C_ADDR|0x01);
        RecvACK();
        buf[0] = RecvData();
        SendACK();
        buf[1] = RecvData();
        SendNAK();
        Stop();
        UART1_TxHex(buf[0]);
        UART1_TxChar(':');
        UART1_TxHex(buf[1]);
        UART1_TxChar(' ');
 
        Start();
        SendData(AT24C_ADDR);
        RecvACK();
        SendData(0x01);
        RecvACK();
        Start();
        SendData(AT24C_ADDR|0x01);
        RecvACK();
        buf[0] = RecvData();
        SendACK();
        buf[1] = RecvData();
        SendNAK();
        Stop();
        UART1_TxHex(buf[0]);
        UART1_TxChar(':');
        UART1_TxHex(buf[1]);
        UART1_TxChar(' ');
 
        Start();
        SendData(AT24C_ADDR);
        RecvACK();
        SendData(0x02);
        RecvACK();
        Start();
        SendData(AT24C_ADDR|0x01);
        RecvACK();
        buf[0] = RecvData();
        SendACK();
        buf[1] = RecvData();
        SendNAK();
        Stop();
        UART1_TxHex(buf[0]);
        UART1_TxChar(':');
        UART1_TxHex(buf[1]);
        UART1_TxChar(' ');
 
        SYS_Delay(200);
    }
}

RecvACK()

void RecvACK

(

)

Definition at line 49 of file at24c08_nonlib.c.

{
    I2CMSCR = 0x03;
    Wait();
}

RecvData()

char RecvData

(

)

Definition at line 55 of file at24c08_nonlib.c.

{
    I2CMSCR = 0x04;
    Wait();
    return I2CRXD;
}

SendACK()

void SendACK

(

)

Definition at line 62 of file at24c08_nonlib.c.

{
    I2CMSST = 0x00;
    I2CMSCR = 0x05;
    Wait();
}

SendData()

void SendData

(

char

dat

)

Definition at line 42 of file at24c08_nonlib.c.

{
    I2CTXD = dat;
    I2CMSCR = 0x02;
    Wait();
}

SendNAK()

void SendNAK

(

)

Definition at line 69 of file at24c08_nonlib.c.

{
    I2CMSST = 0x01;
    I2CMSCR = 0x05;
    Wait();
}

Start()

void Start

(

)

Definition at line 36 of file at24c08_nonlib.c.

{
    I2CMSCR = 0x01;
    Wait();
}

Stop()

void Stop

(

)

Definition at line 76 of file at24c08_nonlib.c.

{
    I2CMSCR = 0x06;
    Wait();
}

Wait()

void Wait

(

)

Definition at line 30 of file at24c08_nonlib.c.

{
    while (!(I2CMSST & 0x40));
    I2CMSST &= ~0x40;
}