75 lines
1.6 KiB
C
75 lines
1.6 KiB
C
|
#include <drv_led.h>
|
||
|
|
#include <timers.h>
|
||
|
|
#include <devices.h>
|
||
|
|
#include <stddef.h>
|
||
|
|
#include "led_info.h"
|
||
|
|
|
||
|
|
#define PRE_SCAN_VALUE 100
|
||
|
|
#define SCAN_ARRAY_SIZE 7
|
||
|
|
|
||
|
|
timer_handler_t TimerTick (void* context);
|
||
|
|
void UpdateKnightRiderLEDs (void);
|
||
|
|
void init(void);
|
||
|
|
|
||
|
|
led_t* ptrLEDs;
|
||
|
|
unsigned char ScanArray[LEDS_NUM_LED_IDS];
|
||
|
|
volatile unsigned char Tick = 0;
|
||
|
|
|
||
|
|
void main(void)
|
||
|
|
{
|
||
|
|
init();
|
||
|
|
|
||
|
|
led_turn_on(ptrLEDs, 0);
|
||
|
|
|
||
|
|
while(1)
|
||
|
|
{
|
||
|
|
if (Tick)
|
||
|
|
{
|
||
|
|
UpdateKnightRiderLEDs();
|
||
|
|
Tick = 0; // Clear timer flag.
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// Initialize LED driver and TSK3000A timer.
|
||
|
|
void init(void)
|
||
|
|
{
|
||
|
|
ptrLEDs = led_open(LEDS);
|
||
|
|
timer_register_handler(0, 80000L, TimerTick);
|
||
|
|
}
|
||
|
|
|
||
|
|
// Callback function for Timer Interrupt - sets flag.
|
||
|
|
timer_handler_t TimerTick (void* context)
|
||
|
|
{
|
||
|
|
Tick = 1; //indicate to mainline that the timer tick has occurred.
|
||
|
|
return NULL;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Function to shift LED brightness pattern.
|
||
|
|
void UpdateKnightRiderLEDs (void)
|
||
|
|
{
|
||
|
|
static unsigned char ScanIndex = 0;
|
||
|
|
static unsigned char LEDScanIndexModifier = 1;
|
||
|
|
|
||
|
|
// Loop to set eight LEDs in linear brightness pattern
|
||
|
|
for (unsigned char i = 0; i < LEDS_NUM_LED_IDS; i++)
|
||
|
|
{
|
||
|
|
if (ScanArray[i] == PRE_SCAN_VALUE)
|
||
|
|
ScanArray[i] = 255;
|
||
|
|
else
|
||
|
|
ScanArray[i] = ScanArray[i] >> 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
ScanArray[ScanIndex] = PRE_SCAN_VALUE;
|
||
|
|
ScanIndex += LEDScanIndexModifier;
|
||
|
|
|
||
|
|
if ((ScanIndex == (LEDS_NUM_LED_IDS-1)) || (ScanIndex == 0))
|
||
|
|
LEDScanIndexModifier *= -1;
|
||
|
|
|
||
|
|
for (unsigned char i = 0; i < LEDS_NUM_LED_IDS; i++)
|
||
|
|
{
|
||
|
|
led_set_intensity(ptrLEDs, i, ScanArray[i]);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|