Tushar Sachdeva / FRDM_K64F_LCD

A simple 128x32 graphical LCD program to quickstart with LCD on ARM mbed IoT Starter Kit. This requires mbed Applciation Shield with FRDM-K64F platform.

Dependencies:   C12832

mbed/SPISlave.h@1:eb68c94a8ee5, 2015-04-12 (annotated)

Committer:
tushki7
Date:
Sun Apr 12 15:45:52 2015 +0000
Revision:
1:eb68c94a8ee5
Parent:
0:60d829a0353a 
A simple 128x32 LCD program with ARM mbed IoT Starter Kit;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
tushki7 0:60d829a0353a 1 /* mbed Microcontroller Library
tushki7 0:60d829a0353a 2 * Copyright (c) 2006-2013 ARM Limited
tushki7 0:60d829a0353a 3 *
tushki7 0:60d829a0353a 4 * Licensed under the Apache License, Version 2.0 (the "License");
tushki7 0:60d829a0353a 5 * you may not use this file except in compliance with the License.
tushki7 0:60d829a0353a 6 * You may obtain a copy of the License at
tushki7 0:60d829a0353a 7 *
tushki7 0:60d829a0353a 8 * http://www.apache.org/licenses/LICENSE-2.0
tushki7 0:60d829a0353a 9 *
tushki7 0:60d829a0353a 10 * Unless required by applicable law or agreed to in writing, software
tushki7 0:60d829a0353a 11 * distributed under the License is distributed on an "AS IS" BASIS,
tushki7 0:60d829a0353a 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
tushki7 0:60d829a0353a 13 * See the License for the specific language governing permissions and
tushki7 0:60d829a0353a 14 * limitations under the License.
tushki7 0:60d829a0353a 15 */
tushki7 0:60d829a0353a 16 #ifndef MBED_SPISLAVE_H
tushki7 0:60d829a0353a 17 #define MBED_SPISLAVE_H
tushki7 0:60d829a0353a 18
tushki7 0:60d829a0353a 19 #include "platform.h"
tushki7 0:60d829a0353a 20
tushki7 0:60d829a0353a 21 #if DEVICE_SPISLAVE
tushki7 0:60d829a0353a 22
tushki7 0:60d829a0353a 23 #include "spi_api.h"
tushki7 0:60d829a0353a 24
tushki7 0:60d829a0353a 25 namespace mbed {
tushki7 0:60d829a0353a 26
tushki7 0:60d829a0353a 27 /** A SPI slave, used for communicating with a SPI Master device
tushki7 0:60d829a0353a 28 *
tushki7 0:60d829a0353a 29 * The default format is set to 8-bits, mode 0, and a clock frequency of 1MHz
tushki7 0:60d829a0353a 30 *
tushki7 0:60d829a0353a 31 * Example:
tushki7 0:60d829a0353a 32 * @code
tushki7 0:60d829a0353a 33 * // Reply to a SPI master as slave
tushki7 0:60d829a0353a 34 *
tushki7 0:60d829a0353a 35 * #include "mbed.h"
tushki7 0:60d829a0353a 36 *
tushki7 0:60d829a0353a 37 * SPISlave device(p5, p6, p7, p8); // mosi, miso, sclk, ssel
tushki7 0:60d829a0353a 38 *
tushki7 0:60d829a0353a 39 * int main() {
tushki7 0:60d829a0353a 40 * device.reply(0x00); // Prime SPI with first reply
tushki7 0:60d829a0353a 41 * while(1) {
tushki7 0:60d829a0353a 42 * if(device.receive()) {
tushki7 0:60d829a0353a 43 * int v = device.read(); // Read byte from master
tushki7 0:60d829a0353a 44 * v = (v + 1) % 0x100; // Add one to it, modulo 256
tushki7 0:60d829a0353a 45 * device.reply(v); // Make this the next reply
tushki7 0:60d829a0353a 46 * }
tushki7 0:60d829a0353a 47 * }
tushki7 0:60d829a0353a 48 * }
tushki7 0:60d829a0353a 49 * @endcode
tushki7 0:60d829a0353a 50 */
tushki7 0:60d829a0353a 51 class SPISlave {
tushki7 0:60d829a0353a 52
tushki7 0:60d829a0353a 53 public:
tushki7 0:60d829a0353a 54
tushki7 0:60d829a0353a 55 /** Create a SPI slave connected to the specified pins
tushki7 0:60d829a0353a 56 *
tushki7 0:60d829a0353a 57 * Pin Options:
tushki7 0:60d829a0353a 58 * (5, 6, 7i, 8) or (11, 12, 13, 14)
tushki7 0:60d829a0353a 59 *
tushki7 0:60d829a0353a 60 * mosi or miso can be specfied as NC if not used
tushki7 0:60d829a0353a 61 *
tushki7 0:60d829a0353a 62 * @param mosi SPI Master Out, Slave In pin
tushki7 0:60d829a0353a 63 * @param miso SPI Master In, Slave Out pin
tushki7 0:60d829a0353a 64 * @param sclk SPI Clock pin
tushki7 0:60d829a0353a 65 * @param ssel SPI chip select pin
tushki7 0:60d829a0353a 66 * @param name (optional) A string to identify the object
tushki7 0:60d829a0353a 67 */
tushki7 0:60d829a0353a 68 SPISlave(PinName mosi, PinName miso, PinName sclk, PinName ssel);
tushki7 0:60d829a0353a 69
tushki7 0:60d829a0353a 70 /** Configure the data transmission format
tushki7 0:60d829a0353a 71 *
tushki7 0:60d829a0353a 72 * @param bits Number of bits per SPI frame (4 - 16)
tushki7 0:60d829a0353a 73 * @param mode Clock polarity and phase mode (0 - 3)
tushki7 0:60d829a0353a 74 *
tushki7 0:60d829a0353a 75 * @code
tushki7 0:60d829a0353a 76 * mode | POL PHA
tushki7 0:60d829a0353a 77 * -----+--------
tushki7 0:60d829a0353a 78 * 0 | 0 0
tushki7 0:60d829a0353a 79 * 1 | 0 1
tushki7 0:60d829a0353a 80 * 2 | 1 0
tushki7 0:60d829a0353a 81 * 3 | 1 1
tushki7 0:60d829a0353a 82 * @endcode
tushki7 0:60d829a0353a 83 */
tushki7 0:60d829a0353a 84 void format(int bits, int mode = 0);
tushki7 0:60d829a0353a 85
tushki7 0:60d829a0353a 86 /** Set the spi bus clock frequency
tushki7 0:60d829a0353a 87 *
tushki7 0:60d829a0353a 88 * @param hz SCLK frequency in hz (default = 1MHz)
tushki7 0:60d829a0353a 89 */
tushki7 0:60d829a0353a 90 void frequency(int hz = 1000000);
tushki7 0:60d829a0353a 91
tushki7 0:60d829a0353a 92 /** Polls the SPI to see if data has been received
tushki7 0:60d829a0353a 93 *
tushki7 0:60d829a0353a 94 * @returns
tushki7 0:60d829a0353a 95 * 0 if no data,
tushki7 0:60d829a0353a 96 * 1 otherwise
tushki7 0:60d829a0353a 97 */
tushki7 0:60d829a0353a 98 int receive(void);
tushki7 0:60d829a0353a 99
tushki7 0:60d829a0353a 100 /** Retrieve data from receive buffer as slave
tushki7 0:60d829a0353a 101 *
tushki7 0:60d829a0353a 102 * @returns
tushki7 0:60d829a0353a 103 * the data in the receive buffer
tushki7 0:60d829a0353a 104 */
tushki7 0:60d829a0353a 105 int read(void);
tushki7 0:60d829a0353a 106
tushki7 0:60d829a0353a 107 /** Fill the transmission buffer with the value to be written out
tushki7 0:60d829a0353a 108 * as slave on the next received message from the master.
tushki7 0:60d829a0353a 109 *
tushki7 0:60d829a0353a 110 * @param value the data to be transmitted next
tushki7 0:60d829a0353a 111 */
tushki7 0:60d829a0353a 112 void reply(int value);
tushki7 0:60d829a0353a 113
tushki7 0:60d829a0353a 114 protected:
tushki7 0:60d829a0353a 115 spi_t _spi;
tushki7 0:60d829a0353a 116
tushki7 0:60d829a0353a 117 int _bits;
tushki7 0:60d829a0353a 118 int _mode;
tushki7 0:60d829a0353a 119 int _hz;
tushki7 0:60d829a0353a 120 };
tushki7 0:60d829a0353a 121
tushki7 0:60d829a0353a 122 } // namespace mbed
tushki7 0:60d829a0353a 123
tushki7 0:60d829a0353a 124 #endif
tushki7 0:60d829a0353a 125
tushki7 0:60d829a0353a 126 #endif