diff options
| -rw-r--r-- | multiplexer.c | 4 | ||||
| -rw-r--r-- | multiplexer.h | 6 |
2 files changed, 7 insertions, 3 deletions
diff --git a/multiplexer.c b/multiplexer.c index d0ae7c7..c893ca3 100644 --- a/multiplexer.c +++ b/multiplexer.c @@ -11,6 +11,10 @@ #include "multiplexer.h" +int mem_fd; +void *gpio_map; +volatile unsigned *gpio; + // // Set up a memory regions to access GPIO // diff --git a/multiplexer.h b/multiplexer.h index 3fb1f87..00c1113 100644 --- a/multiplexer.h +++ b/multiplexer.h @@ -52,8 +52,8 @@ static uint8_t gpioToPUDCLK [] = static int tpic_settle_time_iterator = 1000; #define wait_tpic_settle_time for (int i=0; i<tpic_settle_time_iterator; i++) { asm volatile("" : : "r" (i)); } -int mem_fd; -void *gpio_map; +extern int mem_fd; +extern void *gpio_map; typedef struct { char buf[3][40]; @@ -75,7 +75,7 @@ typedef struct { } t_scroll_data; // I/O access -volatile unsigned *gpio; +extern 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)) |