meas.h

00001 /*
00002  *  Copyright 2014 Embedded Artists AB
00003  *
00004  *  Licensed under the Apache License, Version 2.0 (the "License");
00005  *  you may not use this file except in compliance with the License.
00006  *  You may obtain a copy of the License at
00007  *
00008  *    http://www.apache.org/licenses/LICENSE-2.0
00009  *
00010  *  Unless required by applicable law or agreed to in writing, software
00011  *  distributed under the License is distributed on an "AS IS" BASIS,
00012  *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
00013  *  See the License for the specific language governing permissions and
00014  *  limitations under the License.
00015  */
00016 
00017 #ifndef _MEAS_H_
00018 #define _MEAS_H_
00019 
00020 /******************************************************************************
00021  * Includes
00022  *****************************************************************************/
00023 
00024 #include "mbed.h"
00025 #include "dm_board_config.h"
00026 
00027 /******************************************************************************
00028  * Typedefs and defines
00029  *****************************************************************************/
00030 
00031 // Enable extra measuring pins, at the expense of peripheral access.
00032 // For example MEAS pins 5-9 will prevent use of UART4/SPI2 and some timers.
00033 //#define EXTRA_PINS
00034 
00035 // Internal macros, don't use directly
00036 #if defined(DM_BOARD_ENABLE_MEASSURING_PINS)
00037   #define _INTERNAL_SET_MEAS_PIN(__port, __pin)    ((LPC_GPIO ## __port)->SET = (1UL << (__pin)))
00038   #define _INTERNAL_CLR_MEAS_PIN(__port, __pin)    ((LPC_GPIO ## __port)->CLR = (1UL << (__pin)))
00039 #else
00040   #define _INTERNAL_SET_MEAS_PIN(__port, __pin)    do {} while(0)
00041   #define _INTERNAL_CLR_MEAS_PIN(__port, __pin)    do {} while(0)
00042 #endif
00043 
00044 // Manipulates measurement pin 1 which is GPIO1[24], available on J10-7
00045 #define SET_MEAS_PIN_1()     _INTERNAL_SET_MEAS_PIN(1, 24)
00046 #define CLR_MEAS_PIN_1()     _INTERNAL_CLR_MEAS_PIN(1, 24)
00047 
00048 // Manipulates measurement pin 2 which is GPIO1[23], available on J10-8
00049 #define SET_MEAS_PIN_2()     _INTERNAL_SET_MEAS_PIN(1, 23)
00050 #define CLR_MEAS_PIN_2()     _INTERNAL_CLR_MEAS_PIN(1, 23)
00051 
00052 // Manipulates measurement pin 3 which is GPIO1[20], available on J10-9
00053 #define SET_MEAS_PIN_3()     _INTERNAL_SET_MEAS_PIN(1, 20)
00054 #define CLR_MEAS_PIN_3()     _INTERNAL_CLR_MEAS_PIN(1, 20)
00055 
00056 // Manipulates measurement pin 4 which is GPIO1[19], available on J10-10
00057 #define SET_MEAS_PIN_4()     _INTERNAL_SET_MEAS_PIN(1, 19)
00058 #define CLR_MEAS_PIN_4()     _INTERNAL_CLR_MEAS_PIN(1, 19)
00059 
00060 #ifdef EXTRA_PINS
00061     // Manipulates measurement pin 5 which is GPIO5[0], available on J10-15
00062     #define SET_MEAS_PIN_5()     _INTERNAL_SET_MEAS_PIN(5, 0)
00063     #define CLR_MEAS_PIN_5()     _INTERNAL_CLR_MEAS_PIN(5, 0)
00064     
00065     // Manipulates measurement pin 6 which is GPIO5[1], available on J10-16
00066     #define SET_MEAS_PIN_6()     _INTERNAL_SET_MEAS_PIN(5, 1)
00067     #define CLR_MEAS_PIN_6()     _INTERNAL_CLR_MEAS_PIN(5, 1)
00068     
00069     // Manipulates measurement pin 7 which is GPIO5[2], available on J10-17
00070     #define SET_MEAS_PIN_7()     _INTERNAL_SET_MEAS_PIN(5, 2)
00071     #define CLR_MEAS_PIN_7()     _INTERNAL_CLR_MEAS_PIN(5, 2)
00072     
00073     // Manipulates measurement pin 8 which is GPIO5[3], available on J10-18
00074     #define SET_MEAS_PIN_8()     _INTERNAL_SET_MEAS_PIN(5, 3)
00075     #define CLR_MEAS_PIN_8()     _INTERNAL_CLR_MEAS_PIN(5, 3)
00076     
00077     // Manipulates measurement pin 9 which is GPIO5[4], available on J10-19
00078     #define SET_MEAS_PIN_9()     _INTERNAL_SET_MEAS_PIN(5, 4)
00079     #define CLR_MEAS_PIN_9()     _INTERNAL_CLR_MEAS_PIN(5, 4)
00080     
00081     #define _INTERNAL_EXTRA_INIT_MEAS() do {\
00082         LPC_IOCON->P5_0 &= ~0x7; \
00083         LPC_IOCON->P5_1 &= ~0x7; \
00084         LPC_IOCON->P5_2 &= ~0x7; \
00085         LPC_IOCON->P5_3 &= ~0x7; \
00086         LPC_IOCON->P5_4 &= ~0x7; \
00087         LPC_GPIO5->DIR |= (1<<0) | (1<<1) | (1<<2) | (1<<3) | (1<<4); \
00088         CLR_MEAS_PIN_5(); \
00089         CLR_MEAS_PIN_6(); \
00090         CLR_MEAS_PIN_7(); \
00091         CLR_MEAS_PIN_8(); \
00092         CLR_MEAS_PIN_9(); \
00093       } while(0)
00094 #else
00095     #define _INTERNAL_EXTRA_INIT_MEAS() do {} while(false)
00096 #endif
00097 
00098 #if defined(DM_BOARD_ENABLE_MEASSURING_PINS)
00099   #define _INTERNAL_INIT_MEAS() do {\
00100       LPC_IOCON->P1_19 &= ~0x7; \
00101       LPC_IOCON->P1_20 &= ~0x7; \
00102       LPC_IOCON->P1_23 &= ~0x7; \
00103       LPC_IOCON->P1_24 &= ~0x7; \
00104       LPC_GPIO1->DIR |= (1<<19) | (1<<20) | (1<<23) | (1<<24); \
00105       CLR_MEAS_PIN_1(); \
00106       CLR_MEAS_PIN_2(); \
00107       CLR_MEAS_PIN_3(); \
00108       CLR_MEAS_PIN_4(); \
00109       _INTERNAL_EXTRA_INIT_MEAS(); \
00110     } while(0)
00111 #else
00112   #define _INTERNAL_INIT_MEAS()                    do {} while(0)
00113 #endif
00114 
00115 /******************************************************************************
00116  * Global Variables
00117  *****************************************************************************/
00118 
00119 #endif /* end _MEAS_H_ */
00120