I2C - dsPIC

void Open_I2C(void) { OpenI2C((I2C_ON & I2C_IDLE_CON & I2C_CLK_HLD & I2C_IPMI_DIS & I2C_7BIT_ADD & I2C_SLW_EN & I2C_SM_DIS & I2C_GCALL_DIS & I2C_STR_DIS & I2C_NACK & I2C_ACK_DIS & I2C_RCV_DIS & I2C_STOP_DIS & I2C_RESTART_DIS & I2C_START_DIS), 0x2E); IdleI2C(); } void WriteByte(unsigned char AddressIC, unsigned int AddressRegister, unsigned char DataByte) { unsigned char i,j; i = AddressRegister >>8; j = AddressRegister; StartI2C(); //scrivo l'indirizzo della eeprom MasterWriteI2C(AddressIC); AckI2C(); MasterWriteI2C(i); AckI2C(); MasterWriteI2C(j); AckI2C(); MasterWriteI2C(DataByte); AckI2C(); StopI2C(); IdleI2C(); return; } unsigned char ReadByte(unsigned char AddressIC, unsigned int AddressRegister) { unsigned char i,j; unsigned char var=1; i = AddressRegister >>8; j = AddressRegister; StartI2C(); //scrivo l'indirizzo della eeprom MasterWriteI2C(AddressIC); AckI2C(); MasterWriteI2C(i); AckI2C(); MasterWriteI2C(j); AckI2C(); RestartI2C(); //StartI2C(); MasterWriteI2C(AddressIC+1); AckI2C(); var = MasterReadI2C(); //AckI2C(); NotAckI2C(); StopI2C(); IdleI2C(); return var; } int main(int argc, char** argv) { unsigned char temp = 0; init_porte(); DisableIntMI2C; Retroilluminazione=1; Open_I2C(); HomeLCD; ClearLCD(); //12345678901234567890 WriteStringLCD(0,0,"------esempio-------"); __delay_ms(500); WriteStringLCD(0,1,"--valore-salvato:---"); __delay_ms(500); WriteByte(0xA2,0x10,5); //__delay_ms(500); temp = ReadByte(0xA2,0x10); lcd_gotoxy(1,3); WriteCharLCD(48+(temp/10)%10); WriteCharLCD(48+temp%10); while(1) { } }

#include<i2c.h> void main(void ) { unsigned int config2, config1; unsigned char *wrptr; unsigned char tx_data[] = {'M','I','C','R','O',’C’,'H','I','P','\0'}; wrptr = tx_data; /* Baud rate is set for 100 kHz */ config2 = 0x11; /* Configure I2C for 7 bit address mode */ config1 = (I2C_ON & I2C_IDLE_CON & I2C_CLK_HLD & I2C_IPMI_DIS & I2C_7BIT_ADD & I2C_SLW_DIS & I2C_SM_DIS & I2C_GCALL_DIS & I2C_STR_DIS & I2C_NACK & I2C_ACK_DIS & I2C_RCV_DIS & I2C_STOP_DIS & I2C_RESTART_DIS & I2C_START_DIS); OpenI2C(config1,config2); IdleI2C(); StartI2C(); /* Wait till Start sequence is completed */ while(I2CCONbits.SEN); /* Clear interrupt flag */ IFS0bits.MI2CIF = 0; /* Write Slave address and set master for transmission */ MasterWriteI2C(0xE); /* Wait till address is transmitted */ while(I2CSTATbits.TBF); // 8 clock cycles while(!IFS0bits.MI2CIF); // Wait for 9th clock cycle IFS0bits.MI2CIF = 0; // Clear interrupt flag while(I2CSTATbits.ACKSTAT); /* Transmit string of data */ MasterputsI2C(wrptr); StopI2C(); /* Wait till stop sequence is completed */ while(I2CCONbits.PEN); CloseI2C(); }