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/SPI.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_SPI_H
tushki7 0:60d829a0353a 17 #define MBED_SPI_H
tushki7 0:60d829a0353a 18
tushki7 0:60d829a0353a 19 #include "platform.h"
tushki7 0:60d829a0353a 20
tushki7 0:60d829a0353a 21 #if DEVICE_SPI
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 Master, used for communicating with SPI slave devices
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 * Most SPI devices will also require Chip Select and Reset signals. These
tushki7 0:60d829a0353a 32 * can be controlled using <DigitalOut> pins
tushki7 0:60d829a0353a 33 *
tushki7 0:60d829a0353a 34 * Example:
tushki7 0:60d829a0353a 35 * @code
tushki7 0:60d829a0353a 36 * // Send a byte to a SPI slave, and record the response
tushki7 0:60d829a0353a 37 *
tushki7 0:60d829a0353a 38 * #include "mbed.h"
tushki7 0:60d829a0353a 39 *
tushki7 0:60d829a0353a 40 * SPI device(p5, p6, p7); // mosi, miso, sclk
tushki7 0:60d829a0353a 41 *
tushki7 0:60d829a0353a 42 * int main() {
tushki7 0:60d829a0353a 43 * int response = device.write(0xFF);
tushki7 0:60d829a0353a 44 * }
tushki7 0:60d829a0353a 45 * @endcode
tushki7 0:60d829a0353a 46 */
tushki7 0:60d829a0353a 47 class SPI {
tushki7 0:60d829a0353a 48
tushki7 0:60d829a0353a 49 public:
tushki7 0:60d829a0353a 50
tushki7 0:60d829a0353a 51 /** Create a SPI master connected to the specified pins
tushki7 0:60d829a0353a 52 *
tushki7 0:60d829a0353a 53 * Pin Options:
tushki7 0:60d829a0353a 54 * (5, 6, 7) or (11, 12, 13)
tushki7 0:60d829a0353a 55 *
tushki7 0:60d829a0353a 56 * mosi or miso can be specfied as NC if not used
tushki7 0:60d829a0353a 57 *
tushki7 0:60d829a0353a 58 * @param mosi SPI Master Out, Slave In pin
tushki7 0:60d829a0353a 59 * @param miso SPI Master In, Slave Out pin
tushki7 0:60d829a0353a 60 * @param sclk SPI Clock pin
tushki7 0:60d829a0353a 61 */
tushki7 0:60d829a0353a 62 SPI(PinName mosi, PinName miso, PinName sclk, PinName _unused=NC);
tushki7 0:60d829a0353a 63
tushki7 0:60d829a0353a 64 /** Configure the data transmission format
tushki7 0:60d829a0353a 65 *
tushki7 0:60d829a0353a 66 * @param bits Number of bits per SPI frame (4 - 16)
tushki7 0:60d829a0353a 67 * @param mode Clock polarity and phase mode (0 - 3)
tushki7 0:60d829a0353a 68 *
tushki7 0:60d829a0353a 69 * @code
tushki7 0:60d829a0353a 70 * mode | POL PHA
tushki7 0:60d829a0353a 71 * -----+--------
tushki7 0:60d829a0353a 72 * 0 | 0 0
tushki7 0:60d829a0353a 73 * 1 | 0 1
tushki7 0:60d829a0353a 74 * 2 | 1 0
tushki7 0:60d829a0353a 75 * 3 | 1 1
tushki7 0:60d829a0353a 76 * @endcode
tushki7 0:60d829a0353a 77 */
tushki7 0:60d829a0353a 78 void format(int bits, int mode = 0);
tushki7 0:60d829a0353a 79
tushki7 0:60d829a0353a 80 /** Set the spi bus clock frequency
tushki7 0:60d829a0353a 81 *
tushki7 0:60d829a0353a 82 * @param hz SCLK frequency in hz (default = 1MHz)
tushki7 0:60d829a0353a 83 */
tushki7 0:60d829a0353a 84 void frequency(int hz = 1000000);
tushki7 0:60d829a0353a 85
tushki7 0:60d829a0353a 86 /** Write to the SPI Slave and return the response
tushki7 0:60d829a0353a 87 *
tushki7 0:60d829a0353a 88 * @param value Data to be sent to the SPI slave
tushki7 0:60d829a0353a 89 *
tushki7 0:60d829a0353a 90 * @returns
tushki7 0:60d829a0353a 91 * Response from the SPI slave
tushki7 0:60d829a0353a 92 */
tushki7 0:60d829a0353a 93 virtual int write(int value);
tushki7 0:60d829a0353a 94
tushki7 0:60d829a0353a 95 public:
tushki7 0:60d829a0353a 96 virtual ~SPI() {
tushki7 0:60d829a0353a 97 }
tushki7 0:60d829a0353a 98
tushki7 0:60d829a0353a 99 protected:
tushki7 0:60d829a0353a 100 spi_t _spi;
tushki7 0:60d829a0353a 101
tushki7 0:60d829a0353a 102 void aquire(void);
tushki7 0:60d829a0353a 103 static SPI *_owner;
tushki7 0:60d829a0353a 104 int _bits;
tushki7 0:60d829a0353a 105 int _mode;
tushki7 0:60d829a0353a 106 int _hz;
tushki7 0:60d829a0353a 107 };
tushki7 0:60d829a0353a 108
tushki7 0:60d829a0353a 109 } // namespace mbed
tushki7 0:60d829a0353a 110
tushki7 0:60d829a0353a 111 #endif
tushki7 0:60d829a0353a 112
tushki7 0:60d829a0353a 113 #endif