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59 lines
1.2 KiB
59 lines
1.2 KiB
/* led.c */ |
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#include "led.h" |
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#include "timer.h" |
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#define FP0XVAL (*((volatile unsigned int *) 0x3FFFC014)) |
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led_pattern *led_current_pattern; |
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led_pattern *led_current_pointer; |
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unsigned int led_next_time; |
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bool led_next_state; |
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led_pattern led_pattern_active[] = {250, 250, 0}; |
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led_pattern led_pattern_unknown[] = {100, 100, 0}; |
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void led_set(bool on) |
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{ |
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if (on) |
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FP0XVAL &= ~0x04000000; |
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else |
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FP0XVAL |= 0x04000000; |
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} |
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void led_update(void) |
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{ |
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unsigned int time = timer_read(); |
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/* This should never be possible, but let's just be sure. */ |
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if (!led_current_pattern) |
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return; |
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if (!led_current_pointer) |
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return; |
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if (((signed int) (((signed int)led_next_time)-time)) > 0) |
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return; |
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led_set(led_next_state); |
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led_next_state = !led_next_state; |
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led_next_time += *led_current_pointer * TIMER0_MS; |
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led_current_pointer++; |
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if (*led_current_pointer == 0) |
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led_current_pointer = led_current_pattern; |
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} |
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void led_set_pattern(led_pattern *pattern) |
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{ |
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if (led_current_pattern == pattern) |
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return; |
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led_current_pattern = pattern; |
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} |
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void led_init(void) |
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{ |
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led_current_pattern = led_pattern_unknown; |
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led_current_pointer = led_pattern_unknown; |
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led_next_state = TRUE; |
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led_next_time = timer_read(); |
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led_update(); |
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}
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