uint16_t exadc_read(uint8_t chan)
{
i2c_repStart(MCP3426_I2C_WRITE_ADDR);
// start a conversion
// 1x PGA gain
// 15 SPS, 16 bit
// one-shot mode
i2c_write(0b10001000 | ((chan & 0x03) << 5));
i2c_stop();
_delay_ms(70); // 15 SPS means 0.0666 seconds between samples
i2c_repStart(MCP3426_I2C_READ_ADDR);
uint16_t r = i2c_readAck() << 8;
r |= i2c_readNak();
return r;
}
// le do endereco de 8 bits, com endereco de 8 bytes (2k bit max)
unsigned char I2C_EEIN (unsigned char address)
{
unsigned char data;
i2c_start();
i2c_write(0xA0);
i2c_write(address);
i2c_repStart();
i2c_write(0xA1);
data=i2c_read(0);
i2c_stop();
return(data);
}
