George Roussos / BLE_Temperature

BLE temperature profile using digital DS1820 or analog LM35 sensors

Dependencies:   DS1820

mbed/SPISlave.h@0:637031152314, 2015-03-07 (annotated)

Committer:
gkroussos
Date:
Sat Mar 07 16:23:41 2015 +0000
Revision:
0:637031152314
Working version 1.0

Who changed what in which revision?

UserRevisionLine numberNew contents of line
gkroussos 0:637031152314 1 /* mbed Microcontroller Library
gkroussos 0:637031152314 2 * Copyright (c) 2006-2013 ARM Limited
gkroussos 0:637031152314 3 *
gkroussos 0:637031152314 4 * Licensed under the Apache License, Version 2.0 (the "License");
gkroussos 0:637031152314 5 * you may not use this file except in compliance with the License.
gkroussos 0:637031152314 6 * You may obtain a copy of the License at
gkroussos 0:637031152314 7 *
gkroussos 0:637031152314 8 * http://www.apache.org/licenses/LICENSE-2.0
gkroussos 0:637031152314 9 *
gkroussos 0:637031152314 10 * Unless required by applicable law or agreed to in writing, software
gkroussos 0:637031152314 11 * distributed under the License is distributed on an "AS IS" BASIS,
gkroussos 0:637031152314 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
gkroussos 0:637031152314 13 * See the License for the specific language governing permissions and
gkroussos 0:637031152314 14 * limitations under the License.
gkroussos 0:637031152314 15 */
gkroussos 0:637031152314 16 #ifndef MBED_SPISLAVE_H
gkroussos 0:637031152314 17 #define MBED_SPISLAVE_H
gkroussos 0:637031152314 18
gkroussos 0:637031152314 19 #include "platform.h"
gkroussos 0:637031152314 20
gkroussos 0:637031152314 21 #if DEVICE_SPISLAVE
gkroussos 0:637031152314 22
gkroussos 0:637031152314 23 #include "spi_api.h"
gkroussos 0:637031152314 24
gkroussos 0:637031152314 25 namespace mbed {
gkroussos 0:637031152314 26
gkroussos 0:637031152314 27 /** A SPI slave, used for communicating with a SPI Master device
gkroussos 0:637031152314 28 *
gkroussos 0:637031152314 29 * The default format is set to 8-bits, mode 0, and a clock frequency of 1MHz
gkroussos 0:637031152314 30 *
gkroussos 0:637031152314 31 * Example:
gkroussos 0:637031152314 32 * @code
gkroussos 0:637031152314 33 * // Reply to a SPI master as slave
gkroussos 0:637031152314 34 *
gkroussos 0:637031152314 35 * #include "mbed.h"
gkroussos 0:637031152314 36 *
gkroussos 0:637031152314 37 * SPISlave device(p5, p6, p7, p8); // mosi, miso, sclk, ssel
gkroussos 0:637031152314 38 *
gkroussos 0:637031152314 39 * int main() {
gkroussos 0:637031152314 40 * device.reply(0x00); // Prime SPI with first reply
gkroussos 0:637031152314 41 * while(1) {
gkroussos 0:637031152314 42 * if(device.receive()) {
gkroussos 0:637031152314 43 * int v = device.read(); // Read byte from master
gkroussos 0:637031152314 44 * v = (v + 1) % 0x100; // Add one to it, modulo 256
gkroussos 0:637031152314 45 * device.reply(v); // Make this the next reply
gkroussos 0:637031152314 46 * }
gkroussos 0:637031152314 47 * }
gkroussos 0:637031152314 48 * }
gkroussos 0:637031152314 49 * @endcode
gkroussos 0:637031152314 50 */
gkroussos 0:637031152314 51 class SPISlave {
gkroussos 0:637031152314 52
gkroussos 0:637031152314 53 public:
gkroussos 0:637031152314 54
gkroussos 0:637031152314 55 /** Create a SPI slave connected to the specified pins
gkroussos 0:637031152314 56 *
gkroussos 0:637031152314 57 * Pin Options:
gkroussos 0:637031152314 58 * (5, 6, 7i, 8) or (11, 12, 13, 14)
gkroussos 0:637031152314 59 *
gkroussos 0:637031152314 60 * mosi or miso can be specfied as NC if not used
gkroussos 0:637031152314 61 *
gkroussos 0:637031152314 62 * @param mosi SPI Master Out, Slave In pin
gkroussos 0:637031152314 63 * @param miso SPI Master In, Slave Out pin
gkroussos 0:637031152314 64 * @param sclk SPI Clock pin
gkroussos 0:637031152314 65 * @param ssel SPI chip select pin
gkroussos 0:637031152314 66 * @param name (optional) A string to identify the object
gkroussos 0:637031152314 67 */
gkroussos 0:637031152314 68 SPISlave(PinName mosi, PinName miso, PinName sclk, PinName ssel);
gkroussos 0:637031152314 69
gkroussos 0:637031152314 70 /** Configure the data transmission format
gkroussos 0:637031152314 71 *
gkroussos 0:637031152314 72 * @param bits Number of bits per SPI frame (4 - 16)
gkroussos 0:637031152314 73 * @param mode Clock polarity and phase mode (0 - 3)
gkroussos 0:637031152314 74 *
gkroussos 0:637031152314 75 * @code
gkroussos 0:637031152314 76 * mode | POL PHA
gkroussos 0:637031152314 77 * -----+--------
gkroussos 0:637031152314 78 * 0 | 0 0
gkroussos 0:637031152314 79 * 1 | 0 1
gkroussos 0:637031152314 80 * 2 | 1 0
gkroussos 0:637031152314 81 * 3 | 1 1
gkroussos 0:637031152314 82 * @endcode
gkroussos 0:637031152314 83 */
gkroussos 0:637031152314 84 void format(int bits, int mode = 0);
gkroussos 0:637031152314 85
gkroussos 0:637031152314 86 /** Set the spi bus clock frequency
gkroussos 0:637031152314 87 *
gkroussos 0:637031152314 88 * @param hz SCLK frequency in hz (default = 1MHz)
gkroussos 0:637031152314 89 */
gkroussos 0:637031152314 90 void frequency(int hz = 1000000);
gkroussos 0:637031152314 91
gkroussos 0:637031152314 92 /** Polls the SPI to see if data has been received
gkroussos 0:637031152314 93 *
gkroussos 0:637031152314 94 * @returns
gkroussos 0:637031152314 95 * 0 if no data,
gkroussos 0:637031152314 96 * 1 otherwise
gkroussos 0:637031152314 97 */
gkroussos 0:637031152314 98 int receive(void);
gkroussos 0:637031152314 99
gkroussos 0:637031152314 100 /** Retrieve data from receive buffer as slave
gkroussos 0:637031152314 101 *
gkroussos 0:637031152314 102 * @returns
gkroussos 0:637031152314 103 * the data in the receive buffer
gkroussos 0:637031152314 104 */
gkroussos 0:637031152314 105 int read(void);
gkroussos 0:637031152314 106
gkroussos 0:637031152314 107 /** Fill the transmission buffer with the value to be written out
gkroussos 0:637031152314 108 * as slave on the next received message from the master.
gkroussos 0:637031152314 109 *
gkroussos 0:637031152314 110 * @param value the data to be transmitted next
gkroussos 0:637031152314 111 */
gkroussos 0:637031152314 112 void reply(int value);
gkroussos 0:637031152314 113
gkroussos 0:637031152314 114 protected:
gkroussos 0:637031152314 115 spi_t _spi;
gkroussos 0:637031152314 116
gkroussos 0:637031152314 117 int _bits;
gkroussos 0:637031152314 118 int _mode;
gkroussos 0:637031152314 119 int _hz;
gkroussos 0:637031152314 120 };
gkroussos 0:637031152314 121
gkroussos 0:637031152314 122 } // namespace mbed
gkroussos 0:637031152314 123
gkroussos 0:637031152314 124 #endif
gkroussos 0:637031152314 125
gkroussos 0:637031152314 126 #endif