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00001 /* 00002 * Copyright (c) 2010, Mariano Alvira <mar@devl.org> and other contributors 00003 * to the MC1322x project (http://mc1322x.devl.org) 00004 * All rights reserved. 00005 * 00006 * Redistribution and use in source and binary forms, with or without 00007 * modification, are permitted provided that the following conditions 00008 * are met: 00009 * 1. Redistributions of source code must retain the above copyright 00010 * notice, this list of conditions and the following disclaimer. 00011 * 2. Redistributions in binary form must reproduce the above copyright 00012 * notice, this list of conditions and the following disclaimer in the 00013 * documentation and/or other materials provided with the distribution. 00014 * 3. Neither the name of the Institute nor the names of its contributors 00015 * may be used to endorse or promote products derived from this software 00016 * without specific prior written permission. 00017 * 00018 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND 00019 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 00020 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 00021 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE 00022 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 00023 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 00024 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 00025 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 00026 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 00027 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 00028 * SUCH DAMAGE. 00029 * 00030 * This file is part of libmc1322x: see http://mc1322x.devl.org 00031 * for details. 00032 * 00033 * 00034 */ 00035 00036 #include <mc1322x.h> 00037 #include <board.h> 00038 00039 #include "tests.h" 00040 #include "config.h" 00041 00042 volatile uint8_t led; 00043 00044 #define LED LED_PURPLE 00045 #define led_init() do { gpio_pad_dir_set(LED_WHITE); gpio_data_reset(LED_WHITE); } while(0); 00046 #define led_on() do { led = 1; gpio_data_set(LED); } while(0); 00047 #define led_off() do { led = 0; gpio_data_reset(LED); } while(0); 00048 00049 void toggle_led(void) { 00050 if(0 == led) { 00051 led_on(); 00052 led = 1; 00053 00054 } else { 00055 led_off(); 00056 } 00057 } 00058 00059 void tmr0_isr(void) { 00060 00061 toggle_led(); 00062 *TMR0_SCTRL = 0; 00063 *TMR0_CSCTRL = 0x0040; /* clear compare flag */ 00064 00065 } 00066 00067 00068 void main(void) { 00069 00070 /* pin direction */ 00071 led_init(); 00072 00073 /* timer setup */ 00074 /* CTRL */ 00075 #define COUNT_MODE 1 /* use rising edge of primary source */ 00076 #define PRIME_SRC 0xf /* Perip. clock with 128 prescale (for 24Mhz = 187500Hz)*/ 00077 #define SEC_SRC 0 /* don't need this */ 00078 #define ONCE 0 /* keep counting */ 00079 #define LEN 1 /* count until compare then reload with value in LOAD */ 00080 #define DIR 0 /* count up */ 00081 #define CO_INIT 0 /* other counters cannot force a re-initialization of this counter */ 00082 #define OUT_MODE 0 /* OFLAG is asserted while counter is active */ 00083 00084 *TMR_ENBL = 0; /* tmrs reset to enabled */ 00085 *TMR0_SCTRL = 0; 00086 *TMR0_CSCTRL = 0x0040; 00087 *TMR0_LOAD = 0; /* reload to zero */ 00088 *TMR0_COMP_UP = 18750; /* trigger a reload at the end */ 00089 *TMR0_CMPLD1 = 18750; /* compare 1 triggered reload level, 10HZ maybe? */ 00090 *TMR0_CNTR = 0; /* reset count register */ 00091 *TMR0_CTRL = (COUNT_MODE<<13) | (PRIME_SRC<<9) | (SEC_SRC<<7) | (ONCE<<6) | (LEN<<5) | (DIR<<4) | (CO_INIT<<3) | (OUT_MODE); 00092 *TMR_ENBL = 0xf; /* enable all the timers --- why not? */ 00093 00094 led_on(); 00095 00096 enable_irq(TMR); 00097 00098 while(1) { 00099 /* sit here and let the interrupts do the work */ 00100 continue; 00101 }; 00102 }