/* * 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. * * */ #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; }; }