spi_master.h

00001 /*
00002 
00003 Copyright (c) 2012-2014 RedBearLab
00004 
00005 Permission is hereby granted, free of charge, to any person obtaining a copy of this software 
00006 and associated documentation files (the "Software"), to deal in the Software without restriction, 
00007 including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, 
00008 and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, 
00009 subject to the following conditions:
00010 The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
00011 
00012 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, 
00013 INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR 
00014 PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE 
00015 FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 
00016 ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
00017 
00018 */
00019 
00020 #ifndef _SPI_MASTER_H_
00021 #define _SPI_MASTER_H_
00022 
00023 #include "mbed.h"
00024 
00025 #define SPI_FREQUENCY_125K 0x02000000UL
00026 #define SPI_FREQUENCY_250K 0x04000000UL
00027 #define SPI_FREQUENCY_500K 0x08000000UL
00028 #define SPI_FREQUENCY_1M   0x10000000UL
00029 #define SPI_FREQUENCY_2M   0x20000000UL
00030 #define SPI_FREQUENCY_4M   0x40000000UL
00031 #define SPI_FREQUENCY_8M   0x80000000UL
00032 
00033 #define SPI_125K 0
00034 #define SPI_250K 1
00035 #define SPI_500K 2
00036 #define SPI_1M   3
00037 #define SPI_2M   4
00038 #define SPI_4M   5
00039 #define SPI_8M   6
00040 
00041 #define SPI_MODE0 0
00042 #define SPI_MODE1 1
00043 #define SPI_MODE2 2
00044 #define SPI_MODE3 3
00045 
00046 #define CS      P0_14
00047 #define SCK     P0_25
00048 #define MOSI    P0_20
00049 #define MISO    P0_22
00050 
00051 typedef enum{
00052     
00053     MSBFIRST = 0,
00054     LSBFIRST = 1
00055     
00056 }BitOrder;
00057 
00058 class SPIClass
00059 {
00060     public:
00061         SPIClass(NRF_SPI_Type *_spi);
00062     
00063         void begin();
00064         void begin(uint32_t sck, uint32_t mosi, uint32_t miso);
00065         uint8_t transfer(uint8_t data);
00066         void endTransfer();
00067             
00068         void setSPIMode( uint8_t mode );
00069         void setFrequency(uint8_t speed );
00070         void setBitORDER( BitOrder  bit);
00071         void setCPHA( bool trailing);
00072         void setCPOL( bool active_low);
00073         
00074         
00075     private:
00076         NRF_SPI_Type *spi;
00077         
00078         uint32_t SCK_Pin;
00079         uint32_t MOSI_Pin;
00080         uint32_t MISO_Pin;
00081 
00082 };
00083 
00084 #endif