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Some implementations of led matrix

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This commit is contained in:
Kai Ryu 2014-01-13 22:04:24 +09:00
parent 44845ab9dd
commit f691f13ba2
2 changed files with 35 additions and 0 deletions
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29
common/led_matrix.c
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@ -18,3 +18,32 @@ along with this program. If not, see <http://www.gnu.org/licenses/>.
#include <avr/io.h>
#include <avr/interrupt.h>
#include "led_matrix.h"
#define LED_MATRIX_TIMER_TOP F_CPU/(256*64)/LED_MATRIX_ROWS
void led_matrix_init(void)
{
/* Timer1 setup */
/* CTC mode */
TCCR1B |= (1<<WGM12);
/* Clock selelct: clk/1 */
TCCR1B |= (1<<CS10);
/* Set TOP value */
uint8_t sreg = SREG;
cli();
OCR1AH = (LED_MATRIX_TIMER_TOP >> 8) & 0xFF;
OCR1AL = LED_MATRIX_TIMER_TOP & 0xFF;
SREG = sreg;
}
void led_matrix_enable(void)
{
/* Enable Compare Match Interrupt */
TIMSK1 |= _BV(OCIE1A);
}
void led_matrix_disable(void)
{
/* Disable Compare Match Interrupt */
TIMSK1 &= ~_BV(OCIE1A);
}

6
common/led_matrix.h
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@ -31,11 +31,17 @@ typedef struct {
uint8_t value;
} led_matrix_element_t;
#ifdef LED_MATRIX_ENABLE
uint8_t led_matrix_rows(void);
uint8_t led_matrix_cols(void);
void led_matrix_init(void);
void led_matrix_enable(void);
void led_matrix_disable(void);
uint8_t led_matrix_scan(void);
#else
#define led_matrix_rows()
#define led_matrix_cols()
#define led_matrix_init()
#endif
#endif