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/*
* bus.h
*
* Created on: 9 Aug 2012
* Author: daniel
*/
#ifndef BUS_H_
#define BUS_H_
#include <stdint.h>
// these are assigned pins in gpio_pins[] in bus.c
#define out_DATA_LINE 0 /* out data signaled on 0 output of decoder */
#define out_CLOCK_LINE 1 /* out clock signaled on 1 output of decoder */
#define out_STROBE_LINE 2 /* out latch strobe on 2 output of decoder */
#define O_GATE 3 /* gates output */
#define OUTPUT_RELAY 4 /* output enable/disable relay */
#define PW_ENABLE 5 /* TTL enable/disable output */
#define POWER_FAIL 6 /* pulled low if +24V OK, pulled high if power fails */
#define RST_GPIB 7 /* don't use SYS_RESETn for this purpose - unpredictable */
// A5, A6 used to select chips
#define Octal_DACportCS_low 0x00
#define Octal_DACportCS_high 0x20
#define TNT_Port 0x40
void bus_init(void); // call this before doing anything
int bus_getpin(int pin);
void bus_setpin(int pin, int value); // set the value of a pin
void bus_writebyte(uint8_t address, uint8_t data); // write a byte to the bus
uint8_t bus_readbyte(uint8_t address); // read a pin from the bus
void bus_shutdown(void); // shutdown the bus
#endif /* BUS_H_ */
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