[X12S] Backlight code splitted from LCD code

[X12S] PCBREV introduction (PCBREV=10 or PCBREV=13)
2016-08-19 12:25:15 +02:00
parent 607e737b32
commit 0994735035
8 changed files with 172 additions and 121 deletions
@@ -0,0 +1,81 @@
+/*
+ * Copyright (C) OpenTX
+ *
+ * Based on code named
+ *   th9x - http://code.google.com/p/th9x
+ *   er9x - http://code.google.com/p/er9x
+ *   gruvin9x - http://code.google.com/p/gruvin9x
+ *
+ * License GPLv2: http://www.gnu.org/licenses/gpl-2.0.html
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include "opentx.h"
+
+void backlightInit()
+{
+  GPIO_InitTypeDef GPIO_InitStructure;
+  GPIO_InitStructure.GPIO_Pin = BL_GPIO_PIN;
+  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
+  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz;
+  GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
+  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
+  GPIO_Init(BL_GPIO, &GPIO_InitStructure);
+  GPIO_PinAFConfig(BL_GPIO, BL_GPIO_PinSource, BL_GPIO_AF);
+}
+
+void backlightEnable(uint8_t dutyCycle)
+{
+  static uint8_t existingDutyCycle;
+  
+  if (dutyCycle == existingDutyCycle || dutyCycle < 5) {
+    return;
+  }
+  else {
+    existingDutyCycle = dutyCycle;
+  }
+  
+  TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
+  TIM_OCInitTypeDef TIM_OCInitStructure;
+  
+  TIM_TimeBaseStructure.TIM_Prescaler = SystemCoreClock / 10000 - 1; // 1KhZ
+  TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
+  TIM_TimeBaseStructure.TIM_Period = 100;
+  TIM_TimeBaseStructure.TIM_ClockDivision = 0;
+  TIM_TimeBaseStructure.TIM_RepetitionCounter = 0;
+  TIM_TimeBaseInit(BL_TIMER, &TIM_TimeBaseStructure);
+  
+  TIM_Cmd(BL_TIMER, DISABLE);
+  
+  /* PWM mode */
+  TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
+  TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
+  TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable;
+#if PCBREV >= 13
+  TIM_OCInitStructure.TIM_Pulse = dutyCycle;
+#else
+  TIM_OCInitStructure.TIM_Pulse = (100 - dutyCycle);
+#endif
+  TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
+  TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_High;
+  TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Set;
+  TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCNIdleState_Set;
+#if PCBREV >= 13
+  TIM_OC4Init(BL_TIMER, &TIM_OCInitStructure);
+#else
+  TIM_OC1Init(BL_TIMER, &TIM_OCInitStructure);
+#endif
+  
+  TIM_Cmd(BL_TIMER, ENABLE);
+  TIM_CtrlPWMOutputs(BL_TIMER, ENABLE);
+}
+
+