Ajout FishPeper

OpenSky/arch/cc251x/hal_ppm.h

@@ -0,0 +1,68 @@
+/*
+    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 "hal_cc25xx.h"
+#include <stdint.h>
+
+#ifdef SBUS_ENABLED
+#define hal_ppm_init() {}
+#else
+void hal_ppm_init(void);
+
+void hal_ppm_failsafe_exit(void);
+void hal_ppm_failsafe_enter(void);
+
+void hal_ppm_timer1_interrupt(void) __interrupt T1_VECTOR;
+
+/*
+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);
+*/
+
+
+
+// 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
+// us -> ticks = ((_us*13)/4) -> (((_frsky*2/3)*13)/4) = ((_frsky*13)/6)
+#define HAL_PPM_FRSKY_TO_TICKCOUNT(_frsky) (((_frsky << 3) + (_frsky << 2)+(_frsky))/6)
+
+// from us to ticks:
+//                               ((_us*13)/4) = ((_us * (8+4+1))/4) = (((_us<<3)+(_us<<2)+(_us))>>2)
+#define HAL_PPM_US_TO_TICKCOUNT(_us) (((_us << 3) + (_us << 2)+(_us)) >> 2)
+
+
+#define PPM_TIMER_ISR(void) hal_ppm_timer1_interrupt(void) __interrupt T1_VECTOR
+
+#define HAL_PPM_UPDATE_CCVALUE(val) SET_WORD_LO_FIRST(T1CC0H, T1CC0L, val)
+#define HAL_PPM_ISR_DISABLE() { cli(); }
+#define HAL_PPM_ISR_ENABLE()  { sei(); }
+#define HAL_PPM_ISR_FLAG_SET() (1)
+#define HAL_PPM_ISR_CLEAR_FLAG() { \
+    T1CTL &= ~(T1CTL_CH0_IF | T1CTL_CH1_IF | T1CTL_CH2_IF | T1CTL_OVFIF);}
+
+#endif  // SBUS_ENABLED
+
+#endif  // HAL_PPM_H_