LPC11U35 ADC Tick & USBSerial
Dependents: SmallDoseMeter_SingleCH_AE_lpc11u35_V1_00
Diff: mbed/SPI.h
- Revision:
- 0:871ab6846b18
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed/SPI.h Mon Feb 19 08:51:33 2018 +0000 @@ -0,0 +1,113 @@ +/* mbed Microcontroller Library + * Copyright (c) 2006-2013 ARM Limited + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +#ifndef MBED_SPI_H +#define MBED_SPI_H + +#include "platform.h" + +#if DEVICE_SPI + +#include "spi_api.h" + +namespace mbed { + +/** A SPI Master, used for communicating with SPI slave devices + * + * The default format is set to 8-bits, mode 0, and a clock frequency of 1MHz + * + * Most SPI devices will also require Chip Select and Reset signals. These + * can be controlled using <DigitalOut> pins + * + * Example: + * @code + * // Send a byte to a SPI slave, and record the response + * + * #include "mbed.h" + * + * SPI device(p5, p6, p7); // mosi, miso, sclk + * + * int main() { + * int response = device.write(0xFF); + * } + * @endcode + */ +class SPI { + +public: + + /** Create a SPI master connected to the specified pins + * + * Pin Options: + * (5, 6, 7) or (11, 12, 13) + * + * mosi or miso can be specfied as NC if not used + * + * @param mosi SPI Master Out, Slave In pin + * @param miso SPI Master In, Slave Out pin + * @param sclk SPI Clock pin + */ + SPI(PinName mosi, PinName miso, PinName sclk, PinName _unused=NC); + + /** Configure the data transmission format + * + * @param bits Number of bits per SPI frame (4 - 16) + * @param mode Clock polarity and phase mode (0 - 3) + * + * @code + * mode | POL PHA + * -----+-------- + * 0 | 0 0 + * 1 | 0 1 + * 2 | 1 0 + * 3 | 1 1 + * @endcode + */ + void format(int bits, int mode = 0); + + /** Set the spi bus clock frequency + * + * @param hz SCLK frequency in hz (default = 1MHz) + */ + void frequency(int hz = 1000000); + + /** Write to the SPI Slave and return the response + * + * @param value Data to be sent to the SPI slave + * + * @returns + * Response from the SPI slave + */ + virtual int write(int value); + +public: + virtual ~SPI() { + } + +protected: + spi_t _spi; + + void aquire(void); + static SPI *_owner; + int _bits; + int _mode; + int _hz; +}; + +} // namespace mbed + +#endif + +#endif