I2C_to_Parallel_ini_PCA9554()

void I2C_to_Parallel_ini_PCA9554	(	uint8_t	scheda_su_scheda_giu,
		uint8_t	select_PCA
	)

The I2C_to_Parallel_ini_PCA9554 inits the I2C_to_Parallel_ini_PCA9554 chips by setting all the outputs high, but the 2 chip select analog muxes, to disable all the chips.

Parameters

[in]	scheda_su_scheda_giu	one of the 2 boards that the postfrontend manages
[in]	select_PCA	the channel in the mux to be enabled, 1, 2 or 3

Returns

No Parameters

void I2C_to_Parallel_ini_PCA9554( uint8_t scheda_su_scheda_giu,     uint8_t select_PCA ){
    uint8_t indirizzo= I2C_to_Parallel_address_1; //We set the first chip; below we will see if this is true
    uint8_t impostazione_iniziale_della_porta= I2C_to_Parallel_1_ini_set; //Default setting for first chip is this.
    uint8_t comando[]={I2C_to_Parallel_Command_configuration_register,0};  //the value of 0 set all bits as ouput and default to 1
    
        if ( select_PCA == I2C_to_Parallel_name_2){
            indirizzo= I2C_to_Parallel_address_2;
            impostazione_iniziale_della_porta=I2C_to_Parallel_2_ini_set;
    }else if (select_PCA == I2C_to_Parallel_name_3){
        indirizzo= I2C_to_Parallel_address_3;
        impostazione_iniziale_della_porta=I2C_to_Parallel_3_ini_set;
    }
//void I2C_mux_select_ch( uint8_t scheda_su_scheda_giu, I2C_mainboard,uint8_t  canale_da_abilitare)
 I2C_mux_select_ch(  scheda_su_scheda_giu,  I2C_mainboard, I2C_mux_abilita_3);  //I2C_mux_abilita_3= the i2C connected to the PCA's
 
            I2C_mux -> MasterTransmit( indirizzo, comando, 2,false); //Set all bits as outputs
            while( I2C_mux -> GetStatus().busy);  // White transmission complete
    
            comando[0]=I2C_to_Parallel_Command_data_to_write;
            comando[1]= impostazione_iniziale_della_porta;  //Ouputs all high   
            I2C_mux -> MasterTransmit( indirizzo, comando, 2,false);  //setbuf all bits to high
            while( I2C_mux -> GetStatus().busy);  // White transmission complete        
    
            comando[0]=I2C_to_Parallel_Command_read_output;
            I2C_mux -> MasterTransmit( indirizzo, comando, 1,true); //Set input register to read
            while( I2C_mux -> GetStatus().busy);  // White transmission complete
            comando[0]=0;
            comando[1]=0;
            I2C_mux -> MasterReceive( indirizzo, comando, 1,false);  //Read back, not needed
            while( I2C_mux -> GetStatus().busy);    
    I2C_mux_select_ch(  scheda_su_scheda_giu,  I2C_mainboard, I2C_mux_disabilita_tutto); //Idle
}

Definition at line 170 of file I2C_to_parallel.c.