[菜农助学交流] 【sun1986821第二帖】【250活动笔记】【E2PROM小试】

#include <stdio.h>

#include "NUC1xx.h"

#include "Driver\DrvSYS.h"

#include "Driver\DrvGPIO.h"

#include "EEPROM_24LC64.h"

#include "Driver\DrvI2C.h"

#include "Driver\DrvUART.h"



int main(void)

{

uint32_t addr = 0x00000010;

uint8_t datain[] = "OK";

uint8_t i, i2cdata;

STR_UART_T sParam;

/* Unlock the protected registers */ 

UNLOCKREG();

/* Enable the 12MHz oscillator oscillation */

DrvSYS_SetOscCtrl(E_SYS_XTL12M, 1);



/* Waiting for 12M Xtal stalble */

DrvSYS_Delay(5000);



/* HCLK clock source. 0: external 12MHz; 4:internal 22MHz RC oscillator */

DrvSYS_SelectHCLKSource(0); 

/* Set UART I/O */

DrvGPIO_InitFunction(E_FUNC_UART0);



/* Select UART Clock Source From 12MHz */

DrvSYS_SelectIPClockSource(E_SYS_UART_CLKSRC, 0);

/*lock the protected registers */

LOCKREG(); 



DrvSYS_SetClockDivider(E_SYS_HCLK_DIV, 0); /* HCLK clock frequency = HCLK clock source / (HCLK_N + 1) */



/* UART Setting */

sParam.u32BaudRate = 9600;

sParam.u8cDataBits = DRVUART_DATABITS_8;

sParam.u8cStopBits = DRVUART_STOPBITS_1;

sParam.u8cParity = DRVUART_PARITY_NONE;

sParam.u8cRxTriggerLevel= DRVUART_FIFO_1BYTES;



/* Set UART Configuration */

DrvUART_Open(UART_PORT0, &sParam);

DrvGPIO_InitFunction(E_FUNC_I2C1); 

for(i=0; i<2; i++)

{ 

Write_24LC64(addr,datain[i]);

i2cdata= Read_24LC64(addr);

_DRVUART_SENDBYTE (UART_PORT0, i2cdata);

}



while(1);



}

#include "NUC1xx.h"

#include "Driver\DrvGPIO.h"

#include "Driver\DrvI2C.h"

#include "Driver\DrvSYS.h"

#include "EEPROM_24LC64.h"



void Write_24LC64(uint32_t address,uint8_t data )

{

uint32_t i;

SystemCoreClock = DrvSYS_GetHCLKFreq(); 

//Open I2C1 and set clock = 50Kbps 

DrvI2C_Open(I2C_PORT1, 50000);



//send i2c start

DrvI2C_Ctrl(I2C_PORT1, 1, 0, 0, 0); //set start

while (I2C1->CON.SI == 0); //poll si flag



//send writer command

I2C1->DATA = (address>>7) & 0x0E | 0XA0; 

//send writer command

DrvI2C_Ctrl(I2C_PORT1, 0, 0, 1, 0); //clr si flag

while( I2C1->CON.SI == 0 ); //poll si flag



//send address

I2C1->DATA = address&0XFF; 

DrvI2C_Ctrl(I2C_PORT1, 0, 0, 1, 1); //clr si and set ack 

while( I2C1->CON.SI == 0 ); //poll si flag



//send data

I2C1->DATA = data; //write data to 

DrvI2C_Ctrl(I2C_PORT1, 0, 0, 1, 1); //clr si and set ack 

while( I2C1->CON.SI == 0 ); //poll si flag



//send i2c stop

DrvI2C_Ctrl(I2C_PORT1, 0, 1, 1, 0); //send stop 

//while( I2C1->CON.SI == 0 );

for(i=0;i<60;i++);

DrvI2C_Close(I2C_PORT1);



for(i=0;i<6000;i++);

for(i=0;i<6000;i++);

}



uint8_t Read_24LC64(uint32_t address)

{

uint8_t TEMP;

//Open I2C1 and set clock = 50Kbps

SystemCoreClock = DrvSYS_GetHCLKFreq(); 

DrvI2C_Open(I2C_PORT1, 50000);



//send i2c start

DrvI2C_Ctrl(I2C_PORT1, 1, 0, 1, 0); //set start

while (I2C1->CON.SI == 0); //poll si flag



//send writer command

I2C1->DATA = (address>>7) & 0x0E | 0XA0; 

DrvI2C_Ctrl(I2C_PORT1, 0, 0, 1, 0); //clr si

while( I2C1->CON.SI == 0 ); //poll si flag



//send address

I2C1->DATA = address&0XFF; 

DrvI2C_Ctrl(I2C_PORT1, 0, 0, 1, 0); //clr si and set ack

while( I2C1->CON.SI == 0 ); //poll si flag



//send start flag

DrvI2C_Ctrl(I2C_PORT1, 1, 0, 1, 0); //clr si and send start 

while( I2C1->CON.SI == 0 ); //poll si flag



//send read command

I2C1->DATA = (address>>7) & 0x0E | 0XA1;

DrvI2C_Ctrl(I2C_PORT1, 0, 0, 1, 1); //clr si

while( I2C1->CON.SI == 0 ); //poll si flag



//resive data

I2C1->DATA = 0XFF;

DrvI2C_Ctrl(I2C_PORT1, 0, 0, 1, 0); //clr si 

while( I2C1->CON.SI == 0 ); //poll si flag

TEMP= I2C1->DATA;



//send i2c stop

DrvI2C_Ctrl(I2C_PORT1, 0, 1, 1, 0); //clr si and set stop

DrvI2C_Close(I2C_PORT1);



return TEMP; 

}