119 lines
3.8 KiB
C
119 lines
3.8 KiB
C
/*
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* Copyright (C) 2020-2025 Roger Clark, VK3KYY / G4KYF
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*
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*
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* Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer
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* in the documentation and/or other materials provided with the distribution.
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*
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* 3. Neither the name of the copyright holder nor the names of its contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* 4. Use of this source code or binary releases for commercial purposes is strictly forbidden. This includes, without limitation,
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* incorporation in a commercial product or incorporation into a product or project which allows commercial use.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
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* USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#include "stm32f4xx_hal.h"
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#include "main.h"
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#include "interfaces/gpio.h"
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#include <stdint.h>
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// use 100 + 1 elements so that we can achieve 100% by putting the reset pattern beyond the end of the DMA loop range
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#define dimingTableSize 101U
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uint32_t dimingPattern[dimingTableSize];
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static uint8_t currentDisplayPercentage = 0;
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#if 0
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void gpioInitButtons(void)
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{
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}
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void gpioInitCommon(void)
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{
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}
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#endif
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void gpioInitDisplay(void)
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{
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HAL_TIM_Base_Start(&htim1);
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HAL_TIM_OC_Start(&htim1, TIM_CHANNEL_1);
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__HAL_TIM_ENABLE_DMA(&htim1, TIM_DMA_CC1);
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}
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void gpioSetDisplayBacklightIntensityPercentage(uint8_t intensityPercentage)
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{
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if (intensityPercentage > 100U)
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{
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intensityPercentage = 100U;
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}
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if (intensityPercentage == currentDisplayPercentage)
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{
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return;
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}
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// Switching from dimmed to 100% or 0% value. Stop the DMA
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if ((intensityPercentage == 100U) || (intensityPercentage == 0U))
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{
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HAL_DMA_Abort(&hdma_tim1_ch1); // kill the DMA
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HAL_GPIO_WritePin(LCD_BKLIGHT_GPIO_Port, LCD_BKLIGHT_Pin, ((intensityPercentage == 100U) ? GPIO_PIN_SET : GPIO_PIN_RESET));
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}
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else
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{
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// Changing from 100% or 0% to dimmed value. So run the DMA
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if ((currentDisplayPercentage == 100U) || (currentDisplayPercentage == 0U))
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{
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HAL_DMA_Start(&hdma_tim1_ch1, (uint32_t)dimingPattern, (uint32_t)&(LCD_BKLIGHT_GPIO_Port->BSRR), 100U);// 100 steps
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}
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//HAL_GPIO_WritePin(LCD_BKLIGHT_GPIO_Port, LCD_BKLIGHT_Pin, GPIO_PIN_RESET);
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}
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dimingPattern[currentDisplayPercentage] = 0U;// remove the previous pin reset pattern
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dimingPattern[0U] = LCD_BKLIGHT_Pin;// turn on the backlight at the start of the array
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dimingPattern[intensityPercentage] = (uint32_t)LCD_BKLIGHT_Pin << 16U;// Turn off the pin at the appropriate position in the array
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currentDisplayPercentage = intensityPercentage;
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}
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uint8_t gpioGetDisplayBacklightIntensityPercentage(void)
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{
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return currentDisplayPercentage;
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}
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#if 0
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void gpioInitFlash(void)
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{
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}
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#endif
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void gpioInitKeyboard(void)
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{
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}
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void gpioInitLEDs(void)
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{
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}
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void gpioInitRotarySwitch(void)
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{
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// config is via the STM32Cube config tool
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}
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#if 0
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void gpioInitC6000Interface(void)
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{
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}
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#endif
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