Ajout FishPeper

OpenSky/arch/stm32f1/hal_ppm.h

@@ -0,0 +1,53 @@
+/*
+    Copyright 2017 fishpepper <AT> gmail.com
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    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.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http:// www.gnu.org/licenses/>.
+
+   author: fishpepper <AT> gmail.com
+*/
+
+#ifndef HAL_PPM_H_
+#define HAL_PPM_H_
+
+#include "config.h"
+#include "stm32f10x_tim.h"
+
+void hal_ppm_init(void);
+
+void hal_ppm_failsafe_exit(void);
+void hal_ppm_failsafe_enter(void);
+
+static void hal_ppm_init_rcc(void);
+static void hal_ppm_init_gpio(void);
+static void hal_ppm_init_timer(void);
+static void hal_ppm_init_nvic(void);
+static void hal_ppm_init_ocx(uint8_t ch, TIM_TypeDef *TIMx, TIM_OCInitTypeDef *tim_oc_init);
+
+// counter runs with 2MHz = 0.5us resolution
+#define HAL_PPM_US_TO_TICKCOUNT(us) ((us * 2)-1)
+// from frsky to ticks coresponding to 1000...2000 us
+// frsky seems to send us*1.5 (~1480...3020)
+// -> divide by 1.5 (=*2/3) to get us -> multiply by 2 to get us
+#define HAL_PPM_FRSKY_TO_TICKCOUNT(_frsky) ((_frsky)*2*2/3)
+
+#define PPM_TIMER_ISR(void) PPM_TIMER_IRQHANDLER(void)
+
+#define HAL_PPM_UPDATE_CCVALUE(x) { PPM_TIMER->ARR = x; }
+#define HAL_PPM_ISR_DISABLE() { __disable_irq(); }
+#define HAL_PPM_ISR_ENABLE()  { __enable_irq(); }
+#define HAL_PPM_ISR_FLAG_SET() (TIM_GetITStatus(PPM_TIMER, TIM_IT_Update) != RESET)
+#define HAL_PPM_ISR_CLEAR_FLAG() { TIM_ClearITPendingBit(PPM_TIMER, TIM_IT_Update); }
+
+
+#endif  // HAL_PPM_H_