127 lines
3.1 KiB
C
127 lines
3.1 KiB
C
/*
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Copyright (C) 2014..2017 Marco Veeneman
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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#include "ch.h"
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#include "hal.h"
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static void pwmpcb(PWMDriver *pwmp)
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{
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(void)pwmp;
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palClearLine(LINE_LED_RED);
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palClearLine(LINE_LED_GREEN);
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palClearLine(LINE_LED_BLUE);
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}
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static void pwmc1cb0(PWMDriver *pwmp)
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{
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(void)pwmp;
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palSetLine(LINE_LED_RED);
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}
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static void pwmc1cb1(PWMDriver *pwmp)
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{
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(void)pwmp;
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palSetLine(LINE_LED_GREEN);
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}
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static void pwmc1cb2(PWMDriver *pwmp)
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{
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(void)pwmp;
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palSetLine(LINE_LED_BLUE);
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}
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static PWMConfig pwmcfg = {
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10000, /* 10kHz PWM clock frequency.*/
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10000, /* Initial PWM period 1S.*/
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pwmpcb,
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{
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{PWM_OUTPUT_DISABLED, pwmc1cb0},
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{PWM_OUTPUT_DISABLED, pwmc1cb1},
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{PWM_OUTPUT_DISABLED, pwmc1cb2},
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{PWM_OUTPUT_DISABLED, NULL},
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{PWM_OUTPUT_DISABLED, NULL},
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{PWM_OUTPUT_DISABLED, NULL},
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{PWM_OUTPUT_DISABLED, NULL},
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{PWM_OUTPUT_DISABLED, NULL}
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}
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};
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/*
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* Application entry point.
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*/
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int main(void)
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{
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/*
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* System initializations.
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* - HAL initialization, this also initializes the configured device drivers
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* and performs the board-specific initializations.
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* - Kernel initialization, the main() function becomes a thread and the
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* RTOS is active.
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*/
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halInit();
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chSysInit();
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palSetLineMode(LINE_LED_RED, PAL_MODE_OUTPUT_PUSHPULL);
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palSetLineMode(LINE_LED_GREEN, PAL_MODE_OUTPUT_PUSHPULL);
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palSetLineMode(LINE_LED_BLUE, PAL_MODE_OUTPUT_PUSHPULL);
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/*
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* Start PWM driver
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*/
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pwmStart(&PWMD1, &pwmcfg);
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pwmEnableChannel(&PWMD1, 0, 0);
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pwmEnableChannel(&PWMD1, 1, 0);
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pwmEnableChannel(&PWMD1, 2, 0);
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pwmEnableChannelNotification(&PWMD1, 0);
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pwmEnableChannelNotification(&PWMD1, 1);
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pwmEnableChannelNotification(&PWMD1, 2);
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pwmEnablePeriodicNotification(&PWMD1);
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/*
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* Normal main() thread activity
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*/
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while (TRUE) {
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uint16_t rgbColour[3];
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uint8_t decColour;
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uint16_t i;
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// Start off with red.
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rgbColour[0] = pwmcfg.frequency - 2;
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rgbColour[1] = 0;
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rgbColour[2] = 0;
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// Choose the colours to increment and decrement.
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for (decColour = 0; decColour < 3; decColour++) {
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int incColour = decColour == 2 ? 0 : decColour + 1;
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// cross-fade the two colours.
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for(i = 0; i < pwmcfg.frequency - 2; i++) {
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rgbColour[decColour] -= 1;
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rgbColour[incColour] += 1;
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pwmEnableChannel(&PWMD1, 0, rgbColour[0]);
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pwmEnableChannel(&PWMD1, 1, rgbColour[1]);
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pwmEnableChannel(&PWMD1, 2, rgbColour[2]);
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chThdSleepMilliseconds(1);
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}
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}
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}
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return 0;
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}
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