Tamura Mizuki / STM32F746_FFT

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Dependencies:   BSP_DISCO_F746NG SDFileSystem_Warning_Fixed

mbed_src_STM32F7/api/SPISlave.h@3:6f7e05dd8d15, 2020-03-06 (annotated)

Committer:
aria19970520
Date:
Fri Mar 06 06:52:14 2020 +0000
Revision:
3:6f7e05dd8d15
Parent:
0:3e46577dc273 
fft

Who changed what in which revision?

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MikamiUitOpen 0:3e46577dc273 1 /* mbed Microcontroller Library
MikamiUitOpen 0:3e46577dc273 2 * Copyright (c) 2006-2013 ARM Limited
MikamiUitOpen 0:3e46577dc273 3 *
MikamiUitOpen 0:3e46577dc273 4 * Licensed under the Apache License, Version 2.0 (the "License");
MikamiUitOpen 0:3e46577dc273 5 * you may not use this file except in compliance with the License.
MikamiUitOpen 0:3e46577dc273 6 * You may obtain a copy of the License at
MikamiUitOpen 0:3e46577dc273 7 *
MikamiUitOpen 0:3e46577dc273 8 * http://www.apache.org/licenses/LICENSE-2.0
MikamiUitOpen 0:3e46577dc273 9 *
MikamiUitOpen 0:3e46577dc273 10 * Unless required by applicable law or agreed to in writing, software
MikamiUitOpen 0:3e46577dc273 11 * distributed under the License is distributed on an "AS IS" BASIS,
MikamiUitOpen 0:3e46577dc273 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
MikamiUitOpen 0:3e46577dc273 13 * See the License for the specific language governing permissions and
MikamiUitOpen 0:3e46577dc273 14 * limitations under the License.
MikamiUitOpen 0:3e46577dc273 15 */
MikamiUitOpen 0:3e46577dc273 16 #ifndef MBED_SPISLAVE_H
MikamiUitOpen 0:3e46577dc273 17 #define MBED_SPISLAVE_H
MikamiUitOpen 0:3e46577dc273 18
MikamiUitOpen 0:3e46577dc273 19 #include "platform.h"
MikamiUitOpen 0:3e46577dc273 20
MikamiUitOpen 0:3e46577dc273 21 #if DEVICE_SPISLAVE
MikamiUitOpen 0:3e46577dc273 22
MikamiUitOpen 0:3e46577dc273 23 #include "spi_api.h"
MikamiUitOpen 0:3e46577dc273 24
MikamiUitOpen 0:3e46577dc273 25 namespace mbed {
MikamiUitOpen 0:3e46577dc273 26
MikamiUitOpen 0:3e46577dc273 27 /** A SPI slave, used for communicating with a SPI Master device
MikamiUitOpen 0:3e46577dc273 28 *
MikamiUitOpen 0:3e46577dc273 29 * The default format is set to 8-bits, mode 0, and a clock frequency of 1MHz
MikamiUitOpen 0:3e46577dc273 30 *
MikamiUitOpen 0:3e46577dc273 31 * Example:
MikamiUitOpen 0:3e46577dc273 32 * @code
MikamiUitOpen 0:3e46577dc273 33 * // Reply to a SPI master as slave
MikamiUitOpen 0:3e46577dc273 34 *
MikamiUitOpen 0:3e46577dc273 35 * #include "mbed.h"
MikamiUitOpen 0:3e46577dc273 36 *
MikamiUitOpen 0:3e46577dc273 37 * SPISlave device(p5, p6, p7, p8); // mosi, miso, sclk, ssel
MikamiUitOpen 0:3e46577dc273 38 *
MikamiUitOpen 0:3e46577dc273 39 * int main() {
MikamiUitOpen 0:3e46577dc273 40 * device.reply(0x00); // Prime SPI with first reply
MikamiUitOpen 0:3e46577dc273 41 * while(1) {
MikamiUitOpen 0:3e46577dc273 42 * if(device.receive()) {
MikamiUitOpen 0:3e46577dc273 43 * int v = device.read(); // Read byte from master
MikamiUitOpen 0:3e46577dc273 44 * v = (v + 1) % 0x100; // Add one to it, modulo 256
MikamiUitOpen 0:3e46577dc273 45 * device.reply(v); // Make this the next reply
MikamiUitOpen 0:3e46577dc273 46 * }
MikamiUitOpen 0:3e46577dc273 47 * }
MikamiUitOpen 0:3e46577dc273 48 * }
MikamiUitOpen 0:3e46577dc273 49 * @endcode
MikamiUitOpen 0:3e46577dc273 50 */
MikamiUitOpen 0:3e46577dc273 51 class SPISlave {
MikamiUitOpen 0:3e46577dc273 52
MikamiUitOpen 0:3e46577dc273 53 public:
MikamiUitOpen 0:3e46577dc273 54
MikamiUitOpen 0:3e46577dc273 55 /** Create a SPI slave connected to the specified pins
MikamiUitOpen 0:3e46577dc273 56 *
MikamiUitOpen 0:3e46577dc273 57 * mosi or miso can be specfied as NC if not used
MikamiUitOpen 0:3e46577dc273 58 *
MikamiUitOpen 0:3e46577dc273 59 * @param mosi SPI Master Out, Slave In pin
MikamiUitOpen 0:3e46577dc273 60 * @param miso SPI Master In, Slave Out pin
MikamiUitOpen 0:3e46577dc273 61 * @param sclk SPI Clock pin
MikamiUitOpen 0:3e46577dc273 62 * @param ssel SPI chip select pin
MikamiUitOpen 0:3e46577dc273 63 */
MikamiUitOpen 0:3e46577dc273 64 SPISlave(PinName mosi, PinName miso, PinName sclk, PinName ssel);
MikamiUitOpen 0:3e46577dc273 65
MikamiUitOpen 0:3e46577dc273 66 /** Configure the data transmission format
MikamiUitOpen 0:3e46577dc273 67 *
MikamiUitOpen 0:3e46577dc273 68 * @param bits Number of bits per SPI frame (4 - 16)
MikamiUitOpen 0:3e46577dc273 69 * @param mode Clock polarity and phase mode (0 - 3)
MikamiUitOpen 0:3e46577dc273 70 *
MikamiUitOpen 0:3e46577dc273 71 * @code
MikamiUitOpen 0:3e46577dc273 72 * mode | POL PHA
MikamiUitOpen 0:3e46577dc273 73 * -----+--------
MikamiUitOpen 0:3e46577dc273 74 * 0 | 0 0
MikamiUitOpen 0:3e46577dc273 75 * 1 | 0 1
MikamiUitOpen 0:3e46577dc273 76 * 2 | 1 0
MikamiUitOpen 0:3e46577dc273 77 * 3 | 1 1
MikamiUitOpen 0:3e46577dc273 78 * @endcode
MikamiUitOpen 0:3e46577dc273 79 */
MikamiUitOpen 0:3e46577dc273 80 void format(int bits, int mode = 0);
MikamiUitOpen 0:3e46577dc273 81
MikamiUitOpen 0:3e46577dc273 82 /** Set the spi bus clock frequency
MikamiUitOpen 0:3e46577dc273 83 *
MikamiUitOpen 0:3e46577dc273 84 * @param hz SCLK frequency in hz (default = 1MHz)
MikamiUitOpen 0:3e46577dc273 85 */
MikamiUitOpen 0:3e46577dc273 86 void frequency(int hz = 1000000);
MikamiUitOpen 0:3e46577dc273 87
MikamiUitOpen 0:3e46577dc273 88 /** Polls the SPI to see if data has been received
MikamiUitOpen 0:3e46577dc273 89 *
MikamiUitOpen 0:3e46577dc273 90 * @returns
MikamiUitOpen 0:3e46577dc273 91 * 0 if no data,
MikamiUitOpen 0:3e46577dc273 92 * 1 otherwise
MikamiUitOpen 0:3e46577dc273 93 */
MikamiUitOpen 0:3e46577dc273 94 int receive(void);
MikamiUitOpen 0:3e46577dc273 95
MikamiUitOpen 0:3e46577dc273 96 /** Retrieve data from receive buffer as slave
MikamiUitOpen 0:3e46577dc273 97 *
MikamiUitOpen 0:3e46577dc273 98 * @returns
MikamiUitOpen 0:3e46577dc273 99 * the data in the receive buffer
MikamiUitOpen 0:3e46577dc273 100 */
MikamiUitOpen 0:3e46577dc273 101 int read(void);
MikamiUitOpen 0:3e46577dc273 102
MikamiUitOpen 0:3e46577dc273 103 /** Fill the transmission buffer with the value to be written out
MikamiUitOpen 0:3e46577dc273 104 * as slave on the next received message from the master.
MikamiUitOpen 0:3e46577dc273 105 *
MikamiUitOpen 0:3e46577dc273 106 * @param value the data to be transmitted next
MikamiUitOpen 0:3e46577dc273 107 */
MikamiUitOpen 0:3e46577dc273 108 void reply(int value);
MikamiUitOpen 0:3e46577dc273 109
MikamiUitOpen 0:3e46577dc273 110 protected:
MikamiUitOpen 0:3e46577dc273 111 spi_t _spi;
MikamiUitOpen 0:3e46577dc273 112
MikamiUitOpen 0:3e46577dc273 113 int _bits;
MikamiUitOpen 0:3e46577dc273 114 int _mode;
MikamiUitOpen 0:3e46577dc273 115 int _hz;
MikamiUitOpen 0:3e46577dc273 116 };
MikamiUitOpen 0:3e46577dc273 117
MikamiUitOpen 0:3e46577dc273 118 } // namespace mbed
MikamiUitOpen 0:3e46577dc273 119
MikamiUitOpen 0:3e46577dc273 120 #endif
MikamiUitOpen 0:3e46577dc273 121
MikamiUitOpen 0:3e46577dc273 122 #endif