set_pcf
set_pcf(adap, 1, I2C_PCF_PIN);
set_pcf(adap, 1, I2C_PCF_PIN | I2C_PCF_ES1);
set_pcf(adap, 1, I2C_PCF_IDLE);
set_pcf(adap, 1, I2C_PCF_ESO);
set_pcf(adap, 1, I2C_PCF_START);
set_pcf(adap, 1, I2C_PCF_REPSTART);
set_pcf(adap, 1, I2C_PCF_STOP);
set_pcf(adap, 1, I2C_PCF_PIN);
set_pcf(adap, 1, I2C_PCF_ESO);