/*---------------------------------------------------------------------------------------------------------*/
/* */
/* Copyright(c) 2017 Nuvoton Technology Corp. All rights reserved. */
/* */
/*---------------------------------------------------------------------------------------------------------*/
//***********************************************************************************************************
// Nuvoton Technoledge Corp.
// Website: http://www.nuvoton.com
// E-Mail : MicroC-8bit@nuvoton.com
// Date : Apr/29/2017
//***********************************************************************************************************
//***********************************************************************************************************
// File Function: N76E003 I2C master mode demo code, the Slave address = 0xA4
//
// ____________ _____________
// | | SDA | |
// | |<-------->| |
// | | | |
// |N76E003(M) | | N76E003(S) |
// |(I2C_Master)| | (I2C_Slave) |
// | | SCL | |
// | |--------->| |
// |____________| |_____________|
//
// The protocol of I2C is same the "24LC64"
//***********************************************************************************************************
#include "N76E003.h"
#include "Common.h"
#include "Delay.h"
#include "SFR_Macro.h"
#include "Function_define.h"
#define I2C_CLOCK 13
#define EEPROM_SLA 0xA4
#define EEPROM_WR 0
#define EEPROM_RD 1
#define ERROR_CODE 0x78
#define PAGE_SIZE 32
//========================================================================================================
void Init_I2C(void)
{
// /* Set I2C clock rate */
I2CLK = I2C_CLOCK;
/* Enable I2C */
set_I2CEN;
}
//========================================================================================================
void I2C_Error(void)
{
// P3 = I2STAT;
// P3 = ERROR_CODE;
while (1);
}
//========================================================================================================
void I2C_Process(UINT8 u8DAT)
{
UINT32 u32Count;
//--------------------------------------------------------------------------------------------
//---- Page Write----------------------------------------------------------------------------
//--------------------------------------------------------------------------------------------
/* Step1 */
set_STA; /* Send Start bit to I2C EEPROM */
clr_SI;
while (!SI); //Check SI set or not
if (I2STAT != 0x08) //Check status value after every step
I2C_Error();
/* Step2 */
clr_STA; //STA=0
I2DAT = (EEPROM_SLA | EEPROM_WR);
clr_SI;
while (!SI); //Check SI set or not
if (I2STAT != 0x18)
I2C_Error();
/* Step3 */
I2DAT = 0x00; //address high for I2C EEPROM
clr_SI;
while (!SI); //Check SI set or not
if (I2STAT != 0x28)
I2C_Error();
/* Step4 */
I2DAT = 0x00; //address low for I2C EEPROM
clr_SI;
while (!SI); //Check SI set or not
if (I2STAT != 0x28)
I2C_Error();
/* Step5 */
for (u32Count = 0; u32Count < PAGE_SIZE; u32Count++)
{
I2DAT = u8DAT;
clr_SI;
while (!SI); //Check SI set or not
if (I2STAT != 0x28)
I2C_Error();
u8DAT = ~u8DAT;
}
//--------------------------------------------------------------------------------------------
//---- Waitting the ready for I2C write------------------------------------------------------
//--------------------------------------------------------------------------------------------
/* Step6 */
do{
set_STO;
clr_SI;
set_STA; //Check if no ACK is returned by EEPROM, it is under timed-write cycle
clr_SI;
while (!SI); //Check SI set or not
if (I2STAT != 0x08) //Check status value after every step
I2C_Error();
clr_STA;
I2DAT = (EEPROM_SLA | EEPROM_WR);
clr_SI;
while (!SI); //Check SI set or not
}while (I2STAT != 0x18);
/* Step7 */
set_STO;
clr_SI;
while (STO); /* Check STOP signal */
//--------------------------------------------------------------------------------------------
//---- Page Read ----------------------------------------------------------------------------
//--------------------------------------------------------------------------------------------
/* Step8 */
set_STA;
clr_SI;
while (!SI); //Check SI set or not
if (I2STAT != 0x08) //Check status value after every step
I2C_Error();
/* Step9 */
I2DAT = (EEPROM_SLA | EEPROM_WR);
clr_STA;
clr_SI;
while (!SI); //Check SI set or not
if (I2STAT != 0x18)
I2C_Error();
/* Step10 */
I2DAT = 0x00; //address high for I2C EEPROM
clr_SI;
while (!SI); //Check SI set or not
if (I2STAT != 0x28)
I2C_Error();
/* Step11 */
I2DAT = 0x00; //address low for I2C EEPROM
clr_SI;
while (!SI); //Check SI set or not
if (I2STAT != 0x28)
I2C_Error();
/* Step12 */
/* Repeated START */
set_STA;
clr_SI;
while (!SI); //Check SI set or not
if (I2STAT != 0x10) //Check status value after every step
I2C_Error();
/* Step13 */
clr_STA; //STA needs to be cleared after START codition is generated
I2DAT = (EEPROM_SLA | EEPROM_RD);
clr_SI;
while (!SI); //Check SI set or not
if (I2STAT != 0x40)
I2C_Error();
/* Step14 */
for (u32Count = 0; u32Count <PAGE_SIZE-1; u32Count++)
{
set_AA;
clr_SI;
while (!SI); //Check SI set or not
if (I2STAT != 0x50)
I2C_Error();
if (I2DAT != u8DAT)
I2C_Error();
u8DAT = ~u8DAT;
}
/* Step15 */
clr_AA;
clr_SI;
while (!SI); //Check SI set or not
if (I2STAT != 0x58)
I2C_Error();
/* Step16 */
set_STO;
clr_SI;
while (STO); /* Check STOP signal */
}
//========================================================================================================
void main(void)
{
/* Note
MCU power on system clock is HIRC (22.1184MHz), so Fsys = 22.1184MHz
*/
Set_All_GPIO_Quasi_Mode;
Init_I2C(); //initial I2C circuit
I2C_Process(0x55); /* I2C Master will send 0x55,0xAA,.... to slave */
P0 = 0x00;
P3 = 0x00;
while (1);
/* =================== */
}
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