nes-proj/cpu/mc1322x/tests/pwm.c
2011-03-11 16:28:14 -05:00

86 lines
2.8 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.
*
*
*/
#include <mc1322x.h>
#include <board.h>
#include <stdio.h>
#include "config.h"
#include "pwm.h"
#include "rtc.h"
int main(void)
{
int x = 32768;
trim_xtal();
uart1_init(INC,MOD,SAMP);
rtc_init();
printf("pwm test\r\n");
pwm_init_stopped(TMR0, 12000000, x);
pwm_init_stopped(TMR1, 12000000, x);
TMR0->ENBL |= TMR_ENABLE_BIT(TMR0) | TMR_ENABLE_BIT(TMR1);
for(;;) {
printf("duty %d = %d%%\r\n", x, ((x * 100 + 32768) / 65536));
switch(uart1_getc()) {
case '[': x -= 1; break;
case ']': x += 1; break;
case '-': x -= 32; break;
case '=': x += 32; break;
case '_': x -= 512; break;
case '+': x += 512; break;
case '`': x = 65535 * 0/10; break;
case '1': x = 65535 * 1/10; break;
case '2': x = 65535 * 2/10; break;
case '3': x = 65535 * 3/10; break;
case '4': x = 65535 * 4/10; break;
case '5': x = 65535 * 5/10; break;
case '6': x = 65535 * 6/10; break;
case '7': x = 65535 * 7/10; break;
case '8': x = 65535 * 8/10; break;
case '9': x = 65535 * 9/10; break;
case '0': x = 65535 * 10/10; break;
}
x &= 65535;
pwm_duty(TMR0, x);
}
}