Paparazzi UAS  v5.15_devel-164-g81d4ceb
Paparazzi is a free software Unmanned Aircraft System.
 All Data Structures Namespaces Files Functions Variables Typedefs Enumerations Enumerator Macros Modules Pages
ppm_arch.h
Go to the documentation of this file.
1 /*
2  * Copyright (C) 2010-2014 The Paparazzi Team
3  *
4  * This file is part of paparazzi.
5  *
6  * paparazzi is free software; you can redistribute it and/or modify
7  * it under the terms of the GNU General Public License as published by
8  * the Free Software Foundation; either version 2, or (at your option)
9  * any later version.
10  *
11  * paparazzi is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14  * GNU General Public License for more details.
15  *
16  * You should have received a copy of the GNU General Public License
17  * along with paparazzi; see the file COPYING. If not, see
18  * <http://www.gnu.org/licenses/>.
19  */
20 
28 #ifndef PPM_ARCH_H
29 #define PPM_ARCH_H
30 
31 
32 #include "LPC21xx.h"
33 #include BOARD_CONFIG
34 
35 #include "mcu_periph/sys_time.h"
36 
43 #define RC_PPM_TICKS_OF_USEC(_v) cpu_ticks_of_usec(_v)
44 #define RC_PPM_SIGNED_TICKS_OF_USEC(_v) signed_cpu_ticks_of_usec(_v)
45 #define USEC_OF_RC_PPM_TICKS(_v) usec_of_cpu_ticks(_v)
46 
47 #define PPM_IT PPM_CRI
48 
49 #define PPM_ISR() { \
50  uint32_t now = PPM_CR; \
51  ppm_decode_frame(now); \
52  }
53 
54 #ifdef USE_PPM_RSSI_GPIO
55 #define RssiValid() (bit_is_set(PPM_RSSI_IOPIN, PPM_RSSI_PIN) == PPM_RSSI_VALID_LEVEL)
56 #endif
57 
58 
59 #endif /* PPM_ARCH_H */
Architecture independent timing functions.