kopia lustrzana https://github.com/OpenRTX/OpenRTX
58 wiersze
2.4 KiB
C
58 wiersze
2.4 KiB
C
/***************************************************************************
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* Copyright (C) 2021 by Federico Amedeo Izzo IU2NUO, *
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* Niccolò Izzo IU2KIN *
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* Frederik Saraci IU2NRO *
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* Silvano Seva IU2KWO *
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 3 of the License, or *
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* (at your option) any later version. *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU General Public License for more details. *
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* *
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* You should have received a copy of the GNU General Public License *
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* along with this program; if not, see <http://www.gnu.org/licenses/> *
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***************************************************************************/
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#include <interfaces/platform.h>
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#include <interfaces/gpio.h>
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#include <hwconfig.h>
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#include "backlight.h"
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void backlight_init()
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{
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/*
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* Configure backlight PWM: 58.5kHz, 8 bit resolution
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*/
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SIM->SCGC6 |= SIM_SCGC6_FTM0(1); /* Enable clock */
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FTM0->CONTROLS[3].CnSC = FTM_CnSC_MSB(1)
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| FTM_CnSC_ELSB(1); /* Edge-aligned PWM, clear on match */
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FTM0->CONTROLS[3].CnV = 0;
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FTM0->MOD = 0xFF; /* Reload value */
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FTM0->SC = FTM_SC_PS(3) /* Prescaler divide by 8 */
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| FTM_SC_CLKS(1); /* Enable timer */
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gpio_setMode(LCD_BKLIGHT, OUTPUT);
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gpio_setAlternateFunction(LCD_BKLIGHT, 2);
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}
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void backlight_terminate()
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{
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gpio_clearPin(LCD_BKLIGHT);
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SIM->SCGC6 &= ~SIM_SCGC6_FTM0(1);
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}
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/*
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* This function is defined in platform.h
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*/
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void platform_setBacklightLevel(uint8_t level)
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{
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FTM0->CONTROLS[3].CnV = level;
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}
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