diff options
| author | Erich Eckner <git@eckner.net> | 2018-10-31 21:48:16 +0100 |
|---|---|---|
| committer | Erich Eckner <git@eckner.net> | 2018-10-31 21:48:16 +0100 |
| commit | d22583f279b2af7e36033ba61f7600482743e58c (patch) | |
| tree | bc1ca9948b4730e062c17e75100c86b0d5237ad1 /multiplexer.c | |
| parent | 03e7f394ff74407e36b0554f6547d0d72f9785b3 (diff) | |
| download | anzeige-d22583f279b2af7e36033ba61f7600482743e58c.tar.xz | |
multiplexer.c: safety against neg. usleep argument, skip all fixed usleep on the raspi
Diffstat (limited to 'multiplexer.c')
| -rw-r--r-- | multiplexer.c | 14 |
1 files changed, 6 insertions, 8 deletions
diff --git a/multiplexer.c b/multiplexer.c index 7fe0d3d..431c6d6 100644 --- a/multiplexer.c +++ b/multiplexer.c @@ -91,16 +91,12 @@ void *put_on_display(void *param) for (column=0; column<8; column++) { GPIO_CLR = 1<<SER_CLK_PIN; GPIO_ALTER(column + line == 7) = 1<<SER_DAT_PIN; - usleep(5); GPIO_SET = 1<<SER_CLK_PIN; - usleep(5); } for (column=39; column>=0; column--) { GPIO_CLR = 1<<SER_CLK_PIN; GPIO_ALTER(display_data -> buf[display_data -> is_buf][column] & (0x01 << line)) = 1<<SER_DAT_PIN; - usleep(5); GPIO_SET = 1<<SER_CLK_PIN; - usleep(5); #endif } #ifdef SKIP_GPIO @@ -112,11 +108,11 @@ void *put_on_display(void *param) break; } // wait until start_time + 1ms - usleep((start_time.tv_sec - stop_time.tv_sec) * 1000000 + (start_time.tv_nsec - stop_time.tv_nsec) / 1000 + 1000); + int wait = (start_time.tv_sec - stop_time.tv_sec) * 1000000 + (start_time.tv_nsec - stop_time.tv_nsec) / 1000 + 1000; + if (wait > 0) + usleep((start_time.tv_sec - stop_time.tv_sec) * 1000000 + (start_time.tv_nsec - stop_time.tv_nsec) / 1000 + 1000); GPIO_SET = 1<<GATE_PIN; // Licht aus - usleep(5); GPIO_CLR = 1<<PAR_CLK_PIN; - usleep(5); GPIO_SET = 1<<PAR_CLK_PIN; #endif } @@ -176,7 +172,9 @@ void *scroll_it(void *param) break; } // wait until start_time + 50ms - usleep((start_time.tv_sec - stop_time.tv_sec) * 1000000 + (start_time.tv_nsec - stop_time.tv_nsec) / 1000 + 50000); + int wait = (start_time.tv_sec - stop_time.tv_sec) * 1000000 + (start_time.tv_nsec - stop_time.tv_nsec) / 1000 + 50000; + if (wait > 0) + usleep((start_time.tv_sec - stop_time.tv_sec) * 1000000 + (start_time.tv_nsec - stop_time.tv_nsec) / 1000 + 50000); display_data . should_buf = (display_data . should_buf + 1) % 3; } display_data . keep_running = 0; |