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#ifndef MULTIPLEXER_H
#define MULTIPLEXER_H
//
// How to access GPIO registers from C-code on the Raspberry-Pi
// Example program
// 15-January-2012
// Dom and Gert
// Revised: 15-Feb-2013
# include <stdint.h>
#ifndef __arm__
#define SKIP_GPIO
#endif
// Access from ARM Running Linux
#define BCM2708_PERI_BASE 0x20000000
#define GPIO_BASE (BCM2708_PERI_BASE + 0x200000) /* GPIO controller */
/** stolen/cited from wiringPi's wiringPi/wiringPi.c lines 536-548 **/
// GPPUD:
// GPIO Pin pull up/down register
#define GPPUD 37
// gpioToPUDCLK
// (Word) offset to the Pull Up Down Clock regsiter
static uint8_t gpioToPUDCLK [] =
{
38,38,38,38,38,38,38,38,38,38,38,38,38,38,38,38,38,38,38,38,38,38,38,38,38,38,38,38,38,38,38,38,
39,39,39,39,39,39,39,39,39,39,39,39,39,39,39,39,39,39,39,39,39,39,39,39,39,39,39,39,39,39,39,39,
};
/** cite end **/
#define PAGE_SIZE (4*1024)
#define BLOCK_SIZE (4*1024)
#define SER_DAT_PIN 26
#define SER_CLK_PIN 19
#define GATE_PIN 13
#define PAR_CLK_PIN 6
#define SENSE_PIN 5
#define SCROLL_BUF_LEN 4096
int mem_fd;
void *gpio_map;
typedef struct {
char buf[3][40];
int should_buf, is_buf, keep_running, should_be_on, is_on;
pthread_t thread_id;
} t_display_data;
typedef struct {
char buf[SCROLL_BUF_LEN];
int start, len;
} t_scroll_buffer;
typedef struct {
int update;
char input[(SCROLL_BUF_LEN - 39) / 2];
int input_len, keep_running;
time_t shine_until;
pthread_t thread_id;
} t_scroll_data;
// I/O access
volatile unsigned *gpio;
// GPIO setup macros. Always use INP_GPIO(x) before using OUT_GPIO(x) or SET_GPIO_ALT(x,y)
#define INP_GPIO(g) *(gpio+((g)/10)) &= ~(7<<(((g)%10)*3))
#define OUT_GPIO(g) *(gpio+((g)/10)) |= (1<<(((g)%10)*3))
#define SET_GPIO_ALT(g,a) *(gpio+((g)/10)) |= (((a)<=3?(a)+4:(a)==4?3:2)<<(((g)%10)*3))
#define GPIO_SET *(gpio+7) // sets bits which are 1 ignores bits which are 0
#define GPIO_CLR *(gpio+10) // clears bits which are 1 ignores bits which are 0
#define GPIO_ALTER(a) *(gpio+((a)==0?10:7)) // alters (a==0: clear, else: set) bits which are 1 ignores bits which are 0
#define GET_GPIO(g) (*(gpio+13)&(1<<g)) // 0 if LOW, (1<<g) if HIGH
#define GPIO_PULL *(gpio+37) // Pull up/pull down
#define GPIO_PULLCLK0 *(gpio+38) // Pull up/pull down clock
int multiplexer_setup_root();
void multiplexer_setup_non_root(t_display_data *display_data);
void multiplexer_setup_scroll(t_scroll_data *scroll_data);
void turn_off_display();
int got_input();
#endif // MULTIPLEXER_H
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