Matthew Sims / mbed

Lab 1 Program C

Dependents:   Lab1C

Fork of mbed by -deleted-

SPI.h@11:1c1ebd0324fa, 2009-08-28 (annotated)

Committer:
rolf.meyer@arm.com
Date:
Fri Aug 28 12:10:11 2009 +0000
Revision:
11:1c1ebd0324fa
Parent:
5:62573be585e9
Child:
20:029aa53d7323
A shiny new version

Who changed what in which revision?

UserRevisionLine numberNew contents of line
rolf.meyer@arm.com 11:1c1ebd0324fa 1 /* mbed Microcontroller Library - SPI
rolf.meyer@arm.com 11:1c1ebd0324fa 2 * Copyright (c) 2006-2009 ARM Limited. All rights reserved.
rolf.meyer@arm.com 11:1c1ebd0324fa 3 * sford
rolf.meyer@arm.com 11:1c1ebd0324fa 4 */
rolf.meyer@arm.com 11:1c1ebd0324fa 5
rolf.meyer@arm.com 11:1c1ebd0324fa 6 #ifndef MBED_SPI_H
rolf.meyer@arm.com 11:1c1ebd0324fa 7 #define MBED_SPI_H
rolf.meyer@arm.com 11:1c1ebd0324fa 8
rolf.meyer@arm.com 11:1c1ebd0324fa 9 #include "platform.h"
rolf.meyer@arm.com 11:1c1ebd0324fa 10 #include "PinNames.h"
rolf.meyer@arm.com 11:1c1ebd0324fa 11 #include "PeripheralNames.h"
rolf.meyer@arm.com 11:1c1ebd0324fa 12 #include "Base.h"
rolf.meyer@arm.com 11:1c1ebd0324fa 13
rolf.meyer@arm.com 11:1c1ebd0324fa 14 namespace mbed {
rolf.meyer@arm.com 11:1c1ebd0324fa 15
rolf.meyer@arm.com 11:1c1ebd0324fa 16 /* Class: SPI
rolf.meyer@arm.com 11:1c1ebd0324fa 17 * A SPI Master, used for communicating with SPI slave devices
rolf.meyer@arm.com 11:1c1ebd0324fa 18 *
rolf.meyer@arm.com 11:1c1ebd0324fa 19 * The default format is set to 8-bits, mode 0, and a clock frequency of 1MHz
rolf.meyer@arm.com 11:1c1ebd0324fa 20 *
rolf.meyer@arm.com 11:1c1ebd0324fa 21 * Most SPI devices will also require Chip Select and Reset signals. These
rolf.meyer@arm.com 11:1c1ebd0324fa 22 * can be controlled using <DigitalOut> pins
rolf.meyer@arm.com 11:1c1ebd0324fa 23 *
rolf.meyer@arm.com 11:1c1ebd0324fa 24 * Example:
rolf.meyer@arm.com 11:1c1ebd0324fa 25 * > // Send a byte to a SPI slave, and record the response
rolf.meyer@arm.com 11:1c1ebd0324fa 26 * >
rolf.meyer@arm.com 11:1c1ebd0324fa 27 * > #include "mbed.h"
rolf.meyer@arm.com 11:1c1ebd0324fa 28 * >
rolf.meyer@arm.com 11:1c1ebd0324fa 29 * > SPI device(p5, p6, p7); // mosi, miso, sclk
rolf.meyer@arm.com 11:1c1ebd0324fa 30 * >
rolf.meyer@arm.com 11:1c1ebd0324fa 31 * > int main() {
rolf.meyer@arm.com 11:1c1ebd0324fa 32 * > int response = device.write(0xFF);
rolf.meyer@arm.com 11:1c1ebd0324fa 33 * > }
rolf.meyer@arm.com 11:1c1ebd0324fa 34 */
rolf.meyer@arm.com 11:1c1ebd0324fa 35 class SPI : public Base {
rolf.meyer@arm.com 11:1c1ebd0324fa 36
rolf.meyer@arm.com 11:1c1ebd0324fa 37 public:
rolf.meyer@arm.com 11:1c1ebd0324fa 38
rolf.meyer@arm.com 11:1c1ebd0324fa 39 /* Constructor: SPI
rolf.meyer@arm.com 11:1c1ebd0324fa 40 * Create a SPI master connected to the specified pins
rolf.meyer@arm.com 11:1c1ebd0324fa 41 *
rolf.meyer@arm.com 11:1c1ebd0324fa 42 * Variables:
rolf.meyer@arm.com 11:1c1ebd0324fa 43 * mosi - SPI Master Out, Slave In pin
rolf.meyer@arm.com 11:1c1ebd0324fa 44 * miso - SPI Master In, Slave Out pin
rolf.meyer@arm.com 11:1c1ebd0324fa 45 * sclk - SPI Clock pin
rolf.meyer@arm.com 11:1c1ebd0324fa 46 * name - (optional) A string to identify the object
rolf.meyer@arm.com 11:1c1ebd0324fa 47 *
rolf.meyer@arm.com 11:1c1ebd0324fa 48 * Pin Options:
rolf.meyer@arm.com 11:1c1ebd0324fa 49 * (5, 6, 7) or (11, 12, 13)
rolf.meyer@arm.com 11:1c1ebd0324fa 50 *
rolf.meyer@arm.com 11:1c1ebd0324fa 51 * mosi or miso can be specfied as NOT_CONNECTED if not used
rolf.meyer@arm.com 11:1c1ebd0324fa 52 */
rolf.meyer@arm.com 11:1c1ebd0324fa 53 SPI(PinName mosi, PinName miso, PinName sclk, const char *name = NULL);
rolf.meyer@arm.com 11:1c1ebd0324fa 54
rolf.meyer@arm.com 11:1c1ebd0324fa 55 /* Function: format
rolf.meyer@arm.com 11:1c1ebd0324fa 56 * Configure the data transmission format
rolf.meyer@arm.com 11:1c1ebd0324fa 57 *
rolf.meyer@arm.com 11:1c1ebd0324fa 58 * Variables:
rolf.meyer@arm.com 11:1c1ebd0324fa 59 * bits - Number of bits per SPI frame (4 - 16)
rolf.meyer@arm.com 11:1c1ebd0324fa 60 * mode - Clock polarity and phase mode (0 - 3)
rolf.meyer@arm.com 11:1c1ebd0324fa 61 *
rolf.meyer@arm.com 11:1c1ebd0324fa 62 * > mode | POL PHA
rolf.meyer@arm.com 11:1c1ebd0324fa 63 * > -----+--------
rolf.meyer@arm.com 11:1c1ebd0324fa 64 * > 0 | 0 0
rolf.meyer@arm.com 11:1c1ebd0324fa 65 * > 1 | 0 1
rolf.meyer@arm.com 11:1c1ebd0324fa 66 * > 2 | 1 0
rolf.meyer@arm.com 11:1c1ebd0324fa 67 * > 3 | 1 1
rolf.meyer@arm.com 11:1c1ebd0324fa 68 */
rolf.meyer@arm.com 11:1c1ebd0324fa 69 void format(int bits, int mode = 0);
rolf.meyer@arm.com 11:1c1ebd0324fa 70
rolf.meyer@arm.com 11:1c1ebd0324fa 71 /* Function: frequency
rolf.meyer@arm.com 11:1c1ebd0324fa 72 * Set the spi bus clock frequency
rolf.meyer@arm.com 11:1c1ebd0324fa 73 *
rolf.meyer@arm.com 11:1c1ebd0324fa 74 * Variables:
rolf.meyer@arm.com 11:1c1ebd0324fa 75 * hz - SCLK frequency in hz (default = 1MHz)
rolf.meyer@arm.com 11:1c1ebd0324fa 76 */
rolf.meyer@arm.com 11:1c1ebd0324fa 77 void frequency(int hz = 1000000);
rolf.meyer@arm.com 11:1c1ebd0324fa 78
rolf.meyer@arm.com 11:1c1ebd0324fa 79 /* Function: write
rolf.meyer@arm.com 11:1c1ebd0324fa 80 * Write to the SPI Slave and return the response
rolf.meyer@arm.com 11:1c1ebd0324fa 81 *
rolf.meyer@arm.com 11:1c1ebd0324fa 82 * Variables:
rolf.meyer@arm.com 11:1c1ebd0324fa 83 * value - Data to be sent to the SPI slave
rolf.meyer@arm.com 11:1c1ebd0324fa 84 * returns - Response from the SPI slave
rolf.meyer@arm.com 11:1c1ebd0324fa 85 */
rolf.meyer@arm.com 11:1c1ebd0324fa 86 int write(int value);
rolf.meyer@arm.com 11:1c1ebd0324fa 87
rolf.meyer@arm.com 11:1c1ebd0324fa 88 #ifdef MBED_RPC
rolf.meyer@arm.com 11:1c1ebd0324fa 89 virtual const struct rpc_method *get_rpc_methods();
rolf.meyer@arm.com 11:1c1ebd0324fa 90 static struct rpc_class *get_rpc_class();
rolf.meyer@arm.com 11:1c1ebd0324fa 91 #endif
rolf.meyer@arm.com 11:1c1ebd0324fa 92
rolf.meyer@arm.com 11:1c1ebd0324fa 93 protected:
rolf.meyer@arm.com 11:1c1ebd0324fa 94
rolf.meyer@arm.com 11:1c1ebd0324fa 95 SPIName _spi;
rolf.meyer@arm.com 11:1c1ebd0324fa 96
rolf.meyer@arm.com 11:1c1ebd0324fa 97 void aquire();
rolf.meyer@arm.com 11:1c1ebd0324fa 98 static SPI *_owner;
rolf.meyer@arm.com 11:1c1ebd0324fa 99 int _bits;
rolf.meyer@arm.com 11:1c1ebd0324fa 100 int _mode;
rolf.meyer@arm.com 11:1c1ebd0324fa 101 int _hz;
rolf.meyer@arm.com 11:1c1ebd0324fa 102
rolf.meyer@arm.com 11:1c1ebd0324fa 103 };
rolf.meyer@arm.com 11:1c1ebd0324fa 104
rolf.meyer@arm.com 11:1c1ebd0324fa 105 } // namespace mbed
rolf.meyer@arm.com 11:1c1ebd0324fa 106
rolf.meyer@arm.com 11:1c1ebd0324fa 107 #endif