baaa2c5741
Now the old GENERIC_RESOURCE macros works again (but usage has changed). Common resources (battery, leds, radio) are now in resources-common.
67 lines
1.5 KiB
C
67 lines
1.5 KiB
C
/**
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* \file
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* Resource for hardware timer handling
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* \author
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* Ralf Schlatterbeck <rsc@runtux.com>
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*
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* \brief get/put pwm for LED pin
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "contiki.h"
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#include "jsonparse.h"
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#include "er-coap.h"
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#include "hw_timer.h"
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#include "generic_resource.h"
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#define DEBUG 1
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#if DEBUG
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#define PRINTF(...) printf(__VA_ARGS__)
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#else
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#define PRINTF(...)
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#endif
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static uint16_t max_ticks = 0, pwm = 0;
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void led_pwm_init (void)
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{
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int8_t result = hwtimer_pwm_ini (3, 20, HWT_PWM_PHASE_CORRECT, 0);
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PRINTF ("HWTIMER init: %d\n", result);
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max_ticks = hwtimer_pwm_max_ticks (3);
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pwm = max_ticks / 2;
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hwtimer_set_pwm (3, HWT_CHANNEL_C, pwm);
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hwtimer_pwm_inverse (3, HWT_CHANNEL_C);
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DDRE |= (1<<PINE5);
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}
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void pwm_from_string (const char *name, const char *s)
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{
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pwm = atoi (s);
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if (pwm > max_ticks) {
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pwm = max_ticks;
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}
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PRINTF ("Setting: %d (max=%d)\n", pwm, max_ticks);
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hwtimer_pwm_inverse (3, HWT_CHANNEL_C);
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DDRE |= (1<<PINE5);
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hwtimer_set_pwm (3, HWT_CHANNEL_C, pwm);
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PRINTF
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( "TCNT3: %04X TCCR3A: %04X TCCR3B: %04X TCCR3C: %04X OCR3C: %04X\n"
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, TCNT3, TCCR3A, TCCR3B, TCCR3C, OCR3C
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);
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}
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size_t pwm_to_string (const char *n, uint8_t is_json, char *buf, size_t bufsize)
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{
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return snprintf (buf, bufsize, "%d", pwm);
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}
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GENERIC_RESOURCE \
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( led_pwm
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, LED PWM
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, duty-cycle
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, pwm_from_string
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, pwm_to_string
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);
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