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mbed library sources

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Superseded

This library was superseded by mbed-dev - https://os.mbed.com/users/mbed_official/code/mbed-dev/.

Development branch of the mbed library sources. This library is kept in synch with the latest changes from the mbed SDK and it is not guaranteed to work.

If you are looking for a stable and tested release, please import one of the official mbed library releases:

Import librarymbed

The official Mbed 2 C/C++ SDK provides the software platform and libraries to build your applications.

Last commit 20 Feb 2019 by mbed official

api/SPISlave.h@9:0ce32e54c9a7, 2013-06-10 (annotated)

Committer:
emilmont
Date:
Mon Jun 10 16:03:00 2013 +0100
Revision:
9:0ce32e54c9a7
Parent:
cpp/SPISlave.h@2:143cac498751
Child:
10:3bc89ef62ce7
Refactoring of the mbed SDK:

- Provide a well defined HAL and API

- Keep separated the HAL implementations for the different targets

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 0:fd0d7bdfcdc2 1 /* mbed Microcontroller Library
emilmont 2:143cac498751 2 * Copyright (c) 2006-2013 ARM Limited
mbed_official 0:fd0d7bdfcdc2 3 *
emilmont 2:143cac498751 4 * Licensed under the Apache License, Version 2.0 (the "License");
emilmont 2:143cac498751 5 * you may not use this file except in compliance with the License.
emilmont 2:143cac498751 6 * You may obtain a copy of the License at
mbed_official 0:fd0d7bdfcdc2 7 *
emilmont 2:143cac498751 8 * http://www.apache.org/licenses/LICENSE-2.0
mbed_official 0:fd0d7bdfcdc2 9 *
emilmont 2:143cac498751 10 * Unless required by applicable law or agreed to in writing, software
emilmont 2:143cac498751 11 * distributed under the License is distributed on an "AS IS" BASIS,
emilmont 2:143cac498751 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
emilmont 2:143cac498751 13 * See the License for the specific language governing permissions and
emilmont 2:143cac498751 14 * limitations under the License.
mbed_official 0:fd0d7bdfcdc2 15 */
mbed_official 0:fd0d7bdfcdc2 16 #ifndef MBED_SPISLAVE_H
mbed_official 0:fd0d7bdfcdc2 17 #define MBED_SPISLAVE_H
mbed_official 0:fd0d7bdfcdc2 18
mbed_official 0:fd0d7bdfcdc2 19 #include "platform.h"
mbed_official 0:fd0d7bdfcdc2 20
mbed_official 0:fd0d7bdfcdc2 21 #if DEVICE_SPISLAVE
mbed_official 0:fd0d7bdfcdc2 22
mbed_official 0:fd0d7bdfcdc2 23 #include "spi_api.h"
mbed_official 0:fd0d7bdfcdc2 24
mbed_official 0:fd0d7bdfcdc2 25 namespace mbed {
mbed_official 0:fd0d7bdfcdc2 26
mbed_official 0:fd0d7bdfcdc2 27 /** A SPI slave, used for communicating with a SPI Master device
mbed_official 0:fd0d7bdfcdc2 28 *
mbed_official 0:fd0d7bdfcdc2 29 * The default format is set to 8-bits, mode 0, and a clock frequency of 1MHz
mbed_official 0:fd0d7bdfcdc2 30 *
mbed_official 0:fd0d7bdfcdc2 31 * Example:
mbed_official 0:fd0d7bdfcdc2 32 * @code
mbed_official 0:fd0d7bdfcdc2 33 * // Reply to a SPI master as slave
mbed_official 0:fd0d7bdfcdc2 34 *
mbed_official 0:fd0d7bdfcdc2 35 * #include "mbed.h"
mbed_official 0:fd0d7bdfcdc2 36 *
mbed_official 0:fd0d7bdfcdc2 37 * SPISlave device(p5, p6, p7, p8); // mosi, miso, sclk, ssel
mbed_official 0:fd0d7bdfcdc2 38 *
mbed_official 0:fd0d7bdfcdc2 39 * int main() {
mbed_official 0:fd0d7bdfcdc2 40 * device.reply(0x00); // Prime SPI with first reply
mbed_official 0:fd0d7bdfcdc2 41 * while(1) {
mbed_official 0:fd0d7bdfcdc2 42 * if(device.receive()) {
mbed_official 0:fd0d7bdfcdc2 43 * int v = device.read(); // Read byte from master
mbed_official 0:fd0d7bdfcdc2 44 * v = (v + 1) % 0x100; // Add one to it, modulo 256
mbed_official 0:fd0d7bdfcdc2 45 * device.reply(v); // Make this the next reply
mbed_official 0:fd0d7bdfcdc2 46 * }
mbed_official 0:fd0d7bdfcdc2 47 * }
mbed_official 0:fd0d7bdfcdc2 48 * }
mbed_official 0:fd0d7bdfcdc2 49 * @endcode
mbed_official 0:fd0d7bdfcdc2 50 */
mbed_official 0:fd0d7bdfcdc2 51 class SPISlave {
mbed_official 0:fd0d7bdfcdc2 52
mbed_official 0:fd0d7bdfcdc2 53 public:
mbed_official 0:fd0d7bdfcdc2 54
mbed_official 0:fd0d7bdfcdc2 55 /** Create a SPI slave connected to the specified pins
mbed_official 0:fd0d7bdfcdc2 56 *
mbed_official 0:fd0d7bdfcdc2 57 * Pin Options:
mbed_official 0:fd0d7bdfcdc2 58 * (5, 6, 7i, 8) or (11, 12, 13, 14)
mbed_official 0:fd0d7bdfcdc2 59 *
mbed_official 0:fd0d7bdfcdc2 60 * mosi or miso can be specfied as NC if not used
mbed_official 0:fd0d7bdfcdc2 61 *
mbed_official 0:fd0d7bdfcdc2 62 * @param mosi SPI Master Out, Slave In pin
mbed_official 0:fd0d7bdfcdc2 63 * @param miso SPI Master In, Slave Out pin
mbed_official 0:fd0d7bdfcdc2 64 * @param sclk SPI Clock pin
mbed_official 0:fd0d7bdfcdc2 65 * @param ssel SPI chip select pin
mbed_official 0:fd0d7bdfcdc2 66 * @param name (optional) A string to identify the object
mbed_official 0:fd0d7bdfcdc2 67 */
mbed_official 0:fd0d7bdfcdc2 68 SPISlave(PinName mosi, PinName miso, PinName sclk, PinName ssel);
mbed_official 0:fd0d7bdfcdc2 69
mbed_official 0:fd0d7bdfcdc2 70 /** Configure the data transmission format
mbed_official 0:fd0d7bdfcdc2 71 *
mbed_official 0:fd0d7bdfcdc2 72 * @param bits Number of bits per SPI frame (4 - 16)
mbed_official 0:fd0d7bdfcdc2 73 * @param mode Clock polarity and phase mode (0 - 3)
mbed_official 0:fd0d7bdfcdc2 74 *
mbed_official 0:fd0d7bdfcdc2 75 * @code
emilmont 2:143cac498751 76 * mode | POL PHA
emilmont 2:143cac498751 77 * -----+--------
emilmont 2:143cac498751 78 * 0 | 0 0
mbed_official 0:fd0d7bdfcdc2 79 * 1 | 0 1
emilmont 2:143cac498751 80 * 2 | 1 0
mbed_official 0:fd0d7bdfcdc2 81 * 3 | 1 1
mbed_official 0:fd0d7bdfcdc2 82 * @endcode
mbed_official 0:fd0d7bdfcdc2 83 */
mbed_official 0:fd0d7bdfcdc2 84 void format(int bits, int mode = 0);
mbed_official 0:fd0d7bdfcdc2 85
mbed_official 0:fd0d7bdfcdc2 86 /** Set the spi bus clock frequency
mbed_official 0:fd0d7bdfcdc2 87 *
mbed_official 0:fd0d7bdfcdc2 88 * @param hz SCLK frequency in hz (default = 1MHz)
mbed_official 0:fd0d7bdfcdc2 89 */
mbed_official 0:fd0d7bdfcdc2 90 void frequency(int hz = 1000000);
mbed_official 0:fd0d7bdfcdc2 91
mbed_official 0:fd0d7bdfcdc2 92 /** Polls the SPI to see if data has been received
mbed_official 0:fd0d7bdfcdc2 93 *
mbed_official 0:fd0d7bdfcdc2 94 * @returns
mbed_official 0:fd0d7bdfcdc2 95 * 0 if no data,
mbed_official 0:fd0d7bdfcdc2 96 * 1 otherwise
mbed_official 0:fd0d7bdfcdc2 97 */
mbed_official 0:fd0d7bdfcdc2 98 int receive(void);
mbed_official 0:fd0d7bdfcdc2 99
mbed_official 0:fd0d7bdfcdc2 100 /** Retrieve data from receive buffer as slave
mbed_official 0:fd0d7bdfcdc2 101 *
mbed_official 0:fd0d7bdfcdc2 102 * @returns
mbed_official 0:fd0d7bdfcdc2 103 * the data in the receive buffer
mbed_official 0:fd0d7bdfcdc2 104 */
mbed_official 0:fd0d7bdfcdc2 105 int read(void);
mbed_official 0:fd0d7bdfcdc2 106
mbed_official 0:fd0d7bdfcdc2 107 /** Fill the transmission buffer with the value to be written out
mbed_official 0:fd0d7bdfcdc2 108 * as slave on the next received message from the master.
mbed_official 0:fd0d7bdfcdc2 109 *
mbed_official 0:fd0d7bdfcdc2 110 * @param value the data to be transmitted next
mbed_official 0:fd0d7bdfcdc2 111 */
mbed_official 0:fd0d7bdfcdc2 112 void reply(int value);
mbed_official 0:fd0d7bdfcdc2 113
mbed_official 0:fd0d7bdfcdc2 114 protected:
mbed_official 0:fd0d7bdfcdc2 115 spi_t _spi;
emilmont 2:143cac498751 116
mbed_official 0:fd0d7bdfcdc2 117 int _bits;
mbed_official 0:fd0d7bdfcdc2 118 int _mode;
mbed_official 0:fd0d7bdfcdc2 119 int _hz;
mbed_official 0:fd0d7bdfcdc2 120 };
mbed_official 0:fd0d7bdfcdc2 121
mbed_official 0:fd0d7bdfcdc2 122 } // namespace mbed
mbed_official 0:fd0d7bdfcdc2 123
mbed_official 0:fd0d7bdfcdc2 124 #endif
mbed_official 0:fd0d7bdfcdc2 125
mbed_official 0:fd0d7bdfcdc2 126 #endif