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https://github.com/drasko/open-ameba.git
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94 lines
2.1 KiB
C
94 lines
2.1 KiB
C
/*
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* Routines to access hardware
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*
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* Copyright (c) 2013 Realtek Semiconductor Corp.
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*
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* This module is a confidential and proprietary property of RealTek and
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* possession or use of this module requires written permission of RealTek.
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*/
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#include "device.h"
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#include "pwmout_api.h" // mbed
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#include "main.h"
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#define PWM_1 PC_0
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#define PWM_2 PC_1
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#define PWM_3 PC_2
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#define PWM_4 PC_3
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#define PWM_PERIOD 20000
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#define USE_FLOAT 0
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#if USE_FLOAT
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#define PWM_STEP (1.0/20.0)
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float pwms[4]={0.0, 0.25, 0.5, 0.75};
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float steps[4]={PWM_STEP, PWM_STEP, PWM_STEP, PWM_STEP};
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#else
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#define PWM_STEP (PWM_PERIOD/20)
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int pwms[4]={0, PWM_PERIOD/4, PWM_PERIOD/2, PWM_PERIOD/4*3};
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int steps[4]={PWM_STEP,PWM_STEP,PWM_STEP,PWM_STEP};
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#endif
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pwmout_t pwm_led[4];
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PinName pwm_led_pin[4] = {PWM_1, PWM_2, PWM_3, PWM_4};
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extern void RtlMsleepOS(u32 ms);
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void pwm_delay(void)
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{
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for(int i=0;i<1000000;i++)
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asm(" nop");
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}
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/**
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* @brief Main program.
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* @param None
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* @retval None
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*/
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//int main_app(IN u16 argc, IN u8 *argv[])
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void main(void)
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{
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int i;
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for (i=0; i<4; i++) {
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pwmout_init(&pwm_led[i], pwm_led_pin[i]);
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pwmout_period_us(&pwm_led[i], PWM_PERIOD);
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}
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while (1) {
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#if USE_FLOAT
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for (i=0; i<4; i++) {
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pwmout_write(&pwm_led[i], pwms[i]);
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pwms[i] += steps[i];
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if (pwms[i] >= 1.0) {
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steps[i] = -PWM_STEP;
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pwms[i] = 1.0;
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}
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if (pwms[i] <= 0.0) {
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steps[i] = PWM_STEP;
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pwms[i] = 0.0;
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}
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}
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#else
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for (i=0; i<4; i++) {
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pwmout_pulsewidth_us(&pwm_led[i], pwms[i]);
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pwms[i] += steps[i];
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if (pwms[i] >= PWM_PERIOD) {
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steps[i] = -PWM_STEP;
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pwms[i] = PWM_PERIOD;
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}
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if (pwms[i] <= 0) {
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steps[i] = PWM_STEP;
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pwms[i] = 0;
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}
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}
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#endif
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// wait_ms(20);
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// RtlMsleepOS(25);
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pwm_delay();
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}
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}
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