I2C_to_parallel.h File Reference

#include <stdint.h>

Go to the source code of this file.

Data Structures
struct	chip_select_type
	This is the struct definition for the selection of the chip select of the relays drivers. More...

Macros
#define	channel_number   6
#define	I2C_to_Parallel_1_ini_set   0xFF
#define	I2C_to_Parallel_2_ini_set   0x7F
#define	I2C_to_Parallel_3_ini_set   0xFD
#define	I2C_to_Parallel_maschera_linee_ucita   0xF
#define	I2C_to_Parallel_address_1   0x21
	address of the first I2C to parallel
#define	I2C_to_Parallel_address_2   0x22
	address of the second I2C to parallel
#define	I2C_to_Parallel_address_3   0x23
	address of the third I2C to parallel
#define	I2C_to_Parallel_name_1   1
	the first PCA
#define	I2C_to_Parallel_name_2   2
	the second PCA
#define	I2C_to_Parallel_name_3   3
	the third PCA
#define	I2C_to_Parallel_Command_read_output   0
	Read output pin, either if they are inputs or outpus.
#define	I2C_to_Parallel_Command_data_to_write   1
	Data are written in the bits set as output.
#define	I2C_to_Parallel_Command_polarity_inversion   2
	Polarity inversion of the read bit, set all 0 in our case.
#define	I2C_to_Parallel_Command_configuration_register   3
	Configuration register, set to 0 for ouput of the corresponding bit.
#define	chip_select_all_off   0xFF

Functions
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.
void	I2C_to_Parallel_set_PCA9554_outputs_values (uint8_t scheda_su_scheda_giu, uint8_t select_PCA, uint8_t value)
	The function I2C_to_Parallel_set_PCA9554_outputs_values allow to set the output pin of the I2C to parallel, there are structures for this. The detector: detector_chip_select_bias, the PGA_DAC.

Variables
const uint8_t	I2C_to_Parallel_ini_set [4]
	...
const struct chip_select_type	detector_chip_select_bias [6]
	This is the vector of constant values which allows to enable the relays drivers of each channels, one at a time. Every selecting pin to be enabled needs to select the chip, namely the port to which is connected, and the pin on the port.
const struct chip_select_type	detector_reset_all_relays_driver
const struct chip_select_type	PGA_DAC_chip_select [6]