120 lines
2.4 KiB
C
120 lines
2.4 KiB
C
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/*
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* rgbled.c
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*
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* using TIM2 CH1-CH3
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*/
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#include <ch32v20x.h>
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#include <stdint.h>
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#include "rtc.h"
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#include "port_pwr.h"
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#define RED 0
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#define GRN 1
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#define BLU 2
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#define BRT_RED 200
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#define BRT_GRN 100
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#define BRT_BLU 200
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#define RGBLED_TIM TIM2
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static uint8_t flash_timeout[3];
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static uint8_t flash[3] = {0};
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static uint8_t state[3] = {0};
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void rgbled_set()
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{
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uint8_t i;
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// flash counters
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for (i = 0; i < 3; i++) {
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if (!flash[i]) {
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flash[i] = flash_timeout[i];
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} else flash[i]--;
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switch (flash_timeout[i]) {
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// always on
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case 0x00: {
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state[i] = 1;
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break;
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}
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// always off
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case 0xff: {
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state[i] = 0;
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break;
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}
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// standard
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default: {
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if (flash[i] == flash_timeout[i]) {
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state[i] ^= 1;
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}
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}
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}
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}
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RGBLED_TIM->CH1CVR = state[RED] ? BRT_RED : 0;
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RGBLED_TIM->CH2CVR = state[GRN] ? BRT_GRN : 0;
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RGBLED_TIM->CH3CVR = state[BLU] ? BRT_BLU : 0;
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}
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void rgbled_update()
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{
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uint16_t w;
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// VCR flash if clock isn't set
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w = BKP_ReadBackupRegister(RTC_STATE_DR);
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switch (w) {
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case RTC_STATE_UNINITIALIZED: {
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flash_timeout[BLU] = 254;
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break;
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}
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default: {
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flash_timeout[BLU] = 0;
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break;
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}
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}
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flash_timeout[GRN] = gat_pwr_state() ? 0 : 0xff;
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flash_timeout[RED] = gat_oc_state() ? 50 : 0xff;
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}
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void rgbled_init()
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{
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TIM_TimeBaseInitTypeDef timer ={0};
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TIM_OCInitTypeDef pwm = {0};
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timer.TIM_Period = (1 << 10) - 1; // 10-bit
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timer.TIM_Prescaler = 0;
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timer.TIM_ClockDivision = TIM_CKD_DIV1;
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timer.TIM_CounterMode = TIM_CounterMode_Up;
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TIM_TimeBaseInit(RGBLED_TIM, &timer);
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pwm.TIM_OCMode = TIM_OCMode_PWM1;
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pwm.TIM_OutputState = TIM_OutputState_Enable;
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pwm.TIM_Pulse = 0;
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pwm.TIM_OCPolarity = TIM_OCPolarity_High;
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TIM_OC1Init(RGBLED_TIM, &pwm);
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TIM_OC2Init(RGBLED_TIM, &pwm);
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TIM_OC3Init(RGBLED_TIM, &pwm);
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TIM_CtrlPWMOutputs(RGBLED_TIM, ENABLE);
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TIM_OC1PreloadConfig(RGBLED_TIM, TIM_OCPreload_Disable);
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TIM_ARRPreloadConfig(RGBLED_TIM, ENABLE);
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TIM_Cmd(RGBLED_TIM, ENABLE);
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RGBLED_TIM->CH1CVR = 0;
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RGBLED_TIM->CH2CVR = 0;
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RGBLED_TIM->CH3CVR = 0;
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}
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