103 lines
3.6 KiB
C
103 lines
3.6 KiB
C
|
/*
|
||
|
|
* Copyright (c) 2010, Mariano Alvira <mar@devl.org> and other contributors
|
||
|
|
* to the MC1322x project (http://mc1322x.devl.org)
|
||
|
|
* All rights reserved.
|
||
|
|
*
|
||
|
|
* Redistribution and use in source and binary forms, with or without
|
||
|
|
* modification, are permitted provided that the following conditions
|
||
|
|
* are met:
|
||
|
|
* 1. Redistributions of source code must retain the above copyright
|
||
|
|
* notice, this list of conditions and the following disclaimer.
|
||
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
||
|
|
* notice, this list of conditions and the following disclaimer in the
|
||
|
|
* documentation and/or other materials provided with the distribution.
|
||
|
|
* 3. Neither the name of the Institute nor the names of its contributors
|
||
|
|
* may be used to endorse or promote products derived from this software
|
||
|
|
* without specific prior written permission.
|
||
|
|
*
|
||
|
|
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
|
||
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
|
||
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
||
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
||
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
||
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||
|
|
* SUCH DAMAGE.
|
||
|
|
*
|
||
|
|
* This file is part of libmc1322x: see http://mc1322x.devl.org
|
||
|
|
* for details.
|
||
|
|
*
|
||
|
|
* $Id: tmr-ints.c,v 1.1 2010/06/10 14:55:39 maralvira Exp $
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <mc1322x.h>
|
||
|
|
#include <board.h>
|
||
|
|
|
||
|
|
#include "tests.h"
|
||
|
|
#include "config.h"
|
||
|
|
|
||
|
|
volatile uint8_t led;
|
||
|
|
|
||
|
|
#define LED LED_PURPLE
|
||
|
|
#define led_init() do { gpio_pad_dir_set(LED_WHITE); gpio_data_reset(LED_WHITE); } while(0);
|
||
|
|
#define led_on() do { led = 1; gpio_data_set(LED); } while(0);
|
||
|
|
#define led_off() do { led = 0; gpio_data_reset(LED); } while(0);
|
||
|
|
|
||
|
|
void toggle_led(void) {
|
||
|
|
if(0 == led) {
|
||
|
|
led_on();
|
||
|
|
led = 1;
|
||
|
|
|
||
|
|
} else {
|
||
|
|
led_off();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
void tmr0_isr(void) {
|
||
|
|
|
||
|
|
toggle_led();
|
||
|
|
*TMR0_SCTRL = 0;
|
||
|
|
*TMR0_CSCTRL = 0x0040; /* clear compare flag */
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
void main(void) {
|
||
|
|
|
||
|
|
/* pin direction */
|
||
|
|
led_init();
|
||
|
|
|
||
|
|
/* timer setup */
|
||
|
|
/* CTRL */
|
||
|
|
#define COUNT_MODE 1 /* use rising edge of primary source */
|
||
|
|
#define PRIME_SRC 0xf /* Perip. clock with 128 prescale (for 24Mhz = 187500Hz)*/
|
||
|
|
#define SEC_SRC 0 /* don't need this */
|
||
|
|
#define ONCE 0 /* keep counting */
|
||
|
|
#define LEN 1 /* count until compare then reload with value in LOAD */
|
||
|
|
#define DIR 0 /* count up */
|
||
|
|
#define CO_INIT 0 /* other counters cannot force a re-initialization of this counter */
|
||
|
|
#define OUT_MODE 0 /* OFLAG is asserted while counter is active */
|
||
|
|
|
||
|
|
*TMR_ENBL = 0; /* tmrs reset to enabled */
|
||
|
|
*TMR0_SCTRL = 0;
|
||
|
|
*TMR0_CSCTRL = 0x0040;
|
||
|
|
*TMR0_LOAD = 0; /* reload to zero */
|
||
|
|
*TMR0_COMP_UP = 18750; /* trigger a reload at the end */
|
||
|
|
*TMR0_CMPLD1 = 18750; /* compare 1 triggered reload level, 10HZ maybe? */
|
||
|
|
*TMR0_CNTR = 0; /* reset count register */
|
||
|
|
*TMR0_CTRL = (COUNT_MODE<<13) | (PRIME_SRC<<9) | (SEC_SRC<<7) | (ONCE<<6) | (LEN<<5) | (DIR<<4) | (CO_INIT<<3) | (OUT_MODE);
|
||
|
|
*TMR_ENBL = 0xf; /* enable all the timers --- why not? */
|
||
|
|
|
||
|
|
led_on();
|
||
|
|
|
||
|
|
enable_irq(TMR);
|
||
|
|
|
||
|
|
while(1) {
|
||
|
|
/* sit here and let the interrupts do the work */
|
||
|
|
continue;
|
||
|
|
};
|
||
|
|
}
|