📄 iic_host_sim.c
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BWPR = 0x9B; //enable the registers written
P3CFG = P3CFG & 0xBF; //P3_6 was configued as general I/O
BWPR = 0xA8; //disable the register written
DDRP3 = DDRP3 | 0x40; //P3_6 was configued output mode
P3 = P3 & 0xBF; //P3_6 = 0 : open eeprom written-protect
}
void delayNOP(void)
{
_nop_();
_nop_();
_nop_();
_nop_();
_nop_();
_nop_();
}
/*
Discription: Write one byte to E2PROM
Input: Device's address, The address to be written(16 bits), The data to be written
*/
void Write_Byte_To_E2PROM(unsigned char device_address, unsigned int word_address, unsigned char byte_data)
{
unsigned char high_address, low_address;
SCIIF = 0x00; //clear I2C flag register
high_address = (word_address & 0xFF00) >> 8;
low_address = word_address & 0x00FF;
I2ADR = device_address; //the device's address
I2DTR = high_address; //High address to be transfered
I2MCR = I2MCR | 0x07; //Set I2C frequency
// I2MCR.0 I2MCR.1 I2MCR.2
//fsys/1024 1 1 1
I2MCR = I2MCR & 0xF7; //Master Send mode:
// Send mode Receive Mode
//I2MCR.3 0 1
I2MCR = I2MCR | 0x10; //I2C start
// Start Stop
//I2MCR.4 1 0
while(I2SR & 0x08); //receive ack signal? 1: no 0: yes
// while(!(I2MCR & 0x20)); //busy? 1: busy 0: idle
while(!(I2SR & 0x02)); //Tx buff empty? 1: empty 0: full
I2DTR = low_address; //Low address to be transfered
while(I2SR & 0x08); //receive ack signal? 1: no 0: yes
while(!(I2SR & 0x02)); //Tx buff empty? 1: empty 0: full
I2DTR = byte_data; //Data to be transfered
while(I2SR & 0x08); //receive ack signal? 1: no 0: yes
while(!(I2SR & 0x02)); //Tx buff empty? 1: empty 0: full
}
/*
Discription: Write one byte to E2PROM
Input: Device's address, The address to be written(16 bits), The data to be written
*/
void Write_Byte_To_E2PROM_s(unsigned char device_address, unsigned int word_address, unsigned char byte_data)
{
unsigned char high_address, low_address;
SCIIF = 0x00; //clear I2C flag register
high_address = (word_address & 0xFF00) >> 8;
low_address = word_address & 0x00FF;
I2ADR = device_address; //the device's address
I2DTR = high_address; //High address to be transfered
I2MCR = I2MCR | 0x07; //Set I2C frequency
// I2MCR.0 I2MCR.1 I2MCR.2
//fsys/1024 1 1 1
I2MCR = I2MCR & 0xF7; //Master Send mode:
// Send mode Receive Mode
//I2MCR.3 0 1
I2MCR = I2MCR | 0x10; //I2C start
// Start Stop
//I2MCR.4 1 0
while(I2SR & 0x08); //receive ack signal? 1: no 0: yes
// while(!(I2MCR & 0x20)); //busy? 1: busy 0: idle
while(!(I2SR & 0x02)); //Tx buff empty? 1: empty 0: full
I2DTR = low_address; //Low address to be transfered
while(I2SR & 0x08); //receive ack signal? 1: no 0: yes
while(!(I2SR & 0x02)); //Tx buff empty? 1: empty 0: full
I2DTR = byte_data; //Data to be transfered
while(I2SR & 0x08); //receive ack signal? 1: no 0: yes
while(!(I2SR & 0x02)); //Tx buff empty? 1: empty 0: full
}
/*
Discription: Read one byte from E2PROM
Input: Device's address, The address to be written(16 bits)
Output: The data of specified address
*/
unsigned char Read_Byte_From_E2PROM(unsigned char device_address, unsigned int word_address)
{
unsigned char high_address, low_address;
unsigned char temp_data;
SCIIF = 0x00; //clear I2C flag register
high_address = (word_address & 0xFF00) >> 8;
low_address = word_address & 0x00FF;
I2ADR = device_address; //the device's address
I2DTR = high_address; //High address to be transfered
I2MCR = I2MCR | 0x07; //Set I2C frequency fsys/1024
I2MCR = I2MCR & 0xF7; //Master mode: Send mode
I2MCR = I2MCR | 0x10; //I2C start
while(I2SR & 0x08); //receive ack signal 1: no 0: yes
while(!(I2SR & 0x02)); //Tx buff empty? 1: empty 0: full
I2DTR = low_address; //Low address to be transfered
while(I2SR & 0x08); //receive ack signal 1: no 0: yes
while(!(I2SR & 0x02)); //Tx buff empty? 1: empty 0: full
I2MCR = I2MCR | 0x08; //Master mode: Receive mode
// I2MCR = I2MCR & 0x7F; //ack after receiving 8 bits
I2MCR = I2MCR | 0x80; //no ack after receiving 8 bits
I2MCR = I2MCR | 0x50; //Restart
while(!(I2SR & 0x01)); //receive buff full?
temp_data = I2DRR; //the data read from E2PROM
_nop_();
_nop_();
return temp_data;
}
/*
Discription: Read one byte from E2PROM with function sim
Input: Device's address, The address to be written(16 bits)
Output: The data of specified address
*/
unsigned char Read_Byte_From_E2PROM_s(unsigned char device_address, unsigned int word_address)
{
unsigned char high_address, low_address;
unsigned char temp_data;
SCIIF = 0x00; //clear I2C flag register
high_address = (word_address & 0xFF00) >> 8;
low_address = word_address & 0x00FF;
I2ADR = device_address; //the device's address
I2DTR = high_address; //High address to be transfered
I2MCR = I2MCR | 0x07; //Set I2C frequency fsys/1024
I2MCR = I2MCR & 0xF7; //Master mode: Send mode
I2MCR = I2MCR | 0x10; //I2C start
while(I2SR & 0x08); //receive ack signal 1: no 0: yes
while(!(I2SR & 0x02)); //Tx buff empty? 1: empty 0: full
I2DTR = low_address; //Low address to be transfered
while(I2SR & 0x08); //receive ack signal 1: no 0: yes
while(!(I2SR & 0x02)); //Tx buff empty? 1: empty 0: full
I2MCR = I2MCR | 0x08; //Master mode: Receive mode
// I2MCR = I2MCR & 0x7F; //ack after receiving 8 bits
I2MCR = I2MCR | 0x80; //no ack after receiving 8 bits
I2MCR = I2MCR | 0x50; //Restart
while(!(I2SR & 0x01)); //receive buff full?
temp_data = I2DRR; //the data read from E2PROM
_nop_();
_nop_();
return temp_data;
}
/*
Discription: Read some bytes in one page from E2PROM
Input: Device's address, The starting address to be written(16 bits)
Output: The datas from starting address
*/
unsigned char Read_Page_From_E2PROM(unsigned char device_address, unsigned int word_address)
{
unsigned char high_address, low_address;
unsigned char temp_data;
SCIIF = 0x00; //clear I2C flag register
high_address = (word_address & 0xFF00) >> 8;
low_address = word_address & 0x00FF;
I2ADR = device_address; //the device's address
I2DTR = high_address; //High address to be transfered
I2MCR = I2MCR | 0x07; //Set I2C frequency fsys/1024
I2MCR = I2MCR & 0xF7; //Master mode: Send mode
I2MCR = I2MCR | 0x10; //I2C start
while(I2SR & 0x08); //receive ack signal 1: no 0: yes
while(!(I2SR & 0x02)); //Tx buff empty? 1: empty 0: full
I2DTR = low_address; //Low address to be transfered
while(I2SR & 0x08); //receive ack signal 1: no 0: yes
while(!(I2SR & 0x02)); //Tx buff empty? 1: empty 0: full
I2MCR = I2MCR | 0x08; //Master mode: Receive mode
I2MCR = I2MCR & 0x7F; //ack after receiving 8 bits
// I2MCR = I2MCR | 0x80; //no ack after receiving 8 bits
I2MCR = I2MCR | 0x50; //Restart
while(!(I2SR & 0x01)); //receive buff full?
temp_data = I2DRR; //the data read from E2PROM
_nop_();
_nop_();
return temp_data;
}
/*
Discription: Read some bytes in one page from E2PROM
Input: Device's address, The starting address to be written(16 bits)
Output: The datas from starting address
*/
unsigned char Read_Page_From_E2PROM_s(unsigned char device_address, unsigned int word_address)
{
unsigned char high_address, low_address;
unsigned char temp_data;
SCIIF = 0x00; //clear I2C flag register
high_address = (word_address & 0xFF00) >> 8;
low_address = word_address & 0x00FF;
I2ADR = device_address; //the device's address
I2DTR = high_address; //High address to be transfered
I2MCR = I2MCR | 0x07; //Set I2C frequency fsys/1024
I2MCR = I2MCR & 0xF7; //Master mode: Send mode
I2MCR = I2MCR | 0x10; //I2C start
while(I2SR & 0x08); //receive ack signal 1: no 0: yes
while(!(I2SR & 0x02)); //Tx buff empty? 1: empty 0: full
I2DTR = low_address; //Low address to be transfered
while(I2SR & 0x08); //receive ack signal 1: no 0: yes
while(!(I2SR & 0x02)); //Tx buff empty? 1: empty 0: full
I2MCR = I2MCR | 0x08; //Master mode: Receive mode
I2MCR = I2MCR & 0x7F; //ack after receiving 8 bits
// I2MCR = I2MCR | 0x80; //no ack after receiving 8 bits
I2MCR = I2MCR | 0x50; //Restart
while(!(I2SR & 0x01)); //receive buff full?
temp_data = I2DRR; //the data read from E2PROM
_nop_();
_nop_();
return temp_data;
}
/*
Discription: Stop I2C transmission
*/
void I2C_Stop_s(void)
{
I2MCR = I2MCR & 0xAF; //I2C Stop
}
/*
Discription: Page Write to E2PROM(the address's low 5 bits are internally incremented)
Input: Device's address, The starting address to be written(16 bits), The data to be written
*/
void Page_Write_To_E2PROM(unsigned char device_address, unsigned int start_address, unsigned char byte_data)
{
unsigned char i;
Write_Byte_To_E2PROM_s(device_address, start_address, byte_data);
for(i=0; i<5; i++)
{
byte_data++;
I2DTR = byte_data;
while(I2SR & 0x08); //receive ack signal? 1: no 0: yes
while(!(I2SR & 0x02)); //Tx buff empty? 1: empty 0: full
}
}
/*
Discription: Page Write to E2PROM(the address's low 5 bits are internally incremented)
Input: Device's address, The starting address to be written(16 bits), The data to be written
*/
void Page_Write_To_E2PROM_s(unsigned char device_address, unsigned int start_address, unsigned char byte_data)
{
unsigned char i;
Write_Byte_To_E2PROM_s(device_address, start_address, byte_data);
for(i=0; i<5; i++)
{
byte_data++;
I2DTR = byte_data;
while(I2SR & 0x08); //receive ack signal? 1: no 0: yes
while(!(I2SR & 0x02)); //Tx buff empty? 1: empty 0: full
}
}
/*
Discription: Waiting for writting E2PROM
*/
void Delay(void)
{
int i;
for(i=0; i<2000; i++);
}
//--------------------------------------------------------------------------------------------------
// 函数名称： delay
// 入口参数： N
// 函数功能：延时子程序，实现(16*N+24)us的延时
// 系统采用11.0592MHz的时钟时,延时满足要求,其它情况需要改动
//--------------------------------------------------------------------------------------------------
void delay(unsigned int N)
{
int i;
for(i=0;i<N;i++);
}
//----
/*
Discription: I2C interrupt routing
*/
void I2C_ROUTING() interrupt 11
{
_nop_();
_nop_();
_nop_();
_nop_();
_nop_();
_nop_();
_nop_();
_nop_();
_nop_();
_nop_();
_nop_();
_nop_();
}
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