unsigned char I2c_read(unsigned char device_addr, unsigned char sub_addr, unsigned char *buff, int ByteNo)
{
int i;
I2c_start();
I2C_DELAY;
if(I2c_write_byte(device_addr)) {
I2c_stop();
DPRINTK("Fail to write device addr\n");
return ERROR_CODE_READ_ADDR;
}
if(I2c_write_byte(sub_addr)) {
I2c_stop();
DPRINTK("Fail to write sub addr\n");
return ERROR_CODE_READ_ADDR;
}
I2c_start();
I2C_DELAY;
if(I2c_write_byte(device_addr+1)) {
I2c_stop();
DPRINTK("Fail to write device addr+1\n");
return ERROR_CODE_READ_ADDR;
}
for(i = 0; i<ByteNo; i++) buff[i] = I2c_read_byte();
I2C_DELAY;
I2C_DELAY_LONG;
I2c_stop();
I2C_DELAY_LONG;
return ERROR_CODE_TRUE;
}
unsigned char I2c_read(unsigned char device_addr, unsigned char sub_addr, unsigned char *buff, int ByteNo)
{
int i;
nack_flag = ByteNo - 1;
I2c_start();
I2C_DELAY;
if(I2c_write_byte(device_addr)) {
I2c_stop();
printk("Fail to write device addr\n");
return ERROR_CODE_READ_ADDR;
}
if(I2c_write_byte(sub_addr)) {
I2c_stop();
printk("Fail to write sub addr\n");
return ERROR_CODE_READ_ADDR;
}
#if 1
// printk("=========i2c_start===\n");
I2c_start();
I2C_DELAY;
if(I2c_write_byte(device_addr+1)) {
I2c_stop();
printk("Fail to write device addr+1\n");
return ERROR_CODE_READ_ADDR;
}
for(i = 0; i<ByteNo; i++) buff[i] = I2c_read_byte(i);
I2C_DELAY;
I2C_DELAY_LONG;
I2c_stop();
I2C_DELAY_LONG;
#endif
printk("buff[0] = %d,buff[1] = %d\n",buff[0],buff[1]);
return ERROR_CODE_TRUE;
}
unsigned char I2c_write(unsigned char device_addr, unsigned char sub_addr, unsigned char *buff, int ByteNo)
{
int i;
I2c_start();
I2C_DELAY;
if(I2c_write_byte(device_addr)) {
I2c_stop();
return ERROR_CODE_WRITE_ADDR;
}
if(I2c_write_byte(sub_addr)) {
I2c_stop();
return ERROR_CODE_WRITE_ADDR;
}
for(i = 0; i<ByteNo; i++) {
if(I2c_write_byte(buff[i])) {
I2c_stop();
return ERROR_CODE_WRITE_DATA;
}
}
I2C_DELAY;
I2c_stop();
I2C_DELAY_LONG;
return ERROR_CODE_TRUE;
}
//========================================================================//
// Leer EEPROM //
//======================================================================//
void leer_EEPROM(void)
{
uint8_t dat;
if(RD_Mer_L==0xff)
{
RD_Mer_H++;}
_delay_ms(3);
I2c_start();
WR_EEPROM(DIR_WR);//Dirrecion de la memoria para escuribir en la memoria
WR_EEPROM(RD_Mer_H);//Dirrecion Alta de la EEPROM
WR_EEPROM(RD_Mer_L);//Dirrecion baja de la EEPROM
I2c_start();
dat=Read_EEPROM();
Lcd_pixel(p_x,p_y,dat);
Lcd_pixel(p_x,p_y,dat);
Lcd_pixel(p_x,p_y,dat);
PORTB=dat;
if(p_y==132)
{
p_x++;
p_y=0;
}
if(p_x==132)
{
p_x=0;
}
p_y++;
RD_Mer_L++;
TWCR=_BV(TWINT)|_BV(TWEN)|_BV(TWSTO);
}
//===============================================================================//
// Datos a la EEPROM //
//=============================================================================//
void Mad_EEPROM(uint8_t dat)
{
if(WR_Mer_L==0xFF)
{WR_Mer_H++;}
I2c_start();
WR_EEPROM(DIR_WR);//Se le dice a la EEprom que se le va a escribir
WR_EEPROM(WR_Mer_H);//Dierrcion alta de la EEPROM
WR_EEPROM(WR_Mer_L);//Dirrecion baja de la EEPROM
WR_EEPROM(dat);
WR_Mer_L++;
TWCR=_BV(TWINT)|_BV(TWEN)|_BV(TWSTO);
PORTB=dat;
}
