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SPI3.h@5:62573be585e9, 2009-01-22 (annotated)

Committer:
simon.ford@mbed.co.uk
Date:
Thu Jan 22 18:32:40 2009 +0000
Revision:
5:62573be585e9
* Added initial RPC release

 * Added RTC and helper functions

 * Added read_u16()/write_u16() to AnalogIn/Out

 * Ticker/Timeout timing fixed!

 * mbedinfo() helper added

 * error() and printf() added to replace DEBUG() and ERROR()

 * DigitalIn supports methods on rise/fall

 * SPI and Serial support NC

 * LED1-4 also map to 1-4

 * Timer object reset fixed

 * SPI uses single mode

 * SPI3 added

Who changed what in which revision?

UserRevisionLine numberNew contents of line
simon.ford@mbed.co.uk 5:62573be585e9 1 /* mbed Microcontroller Library - SPI3
simon.ford@mbed.co.uk 5:62573be585e9 2 * Copyright (c) 2007-2009, sford
simon.ford@mbed.co.uk 5:62573be585e9 3 */
simon.ford@mbed.co.uk 5:62573be585e9 4
simon.ford@mbed.co.uk 5:62573be585e9 5 #ifndef MBED_SPI3_H
simon.ford@mbed.co.uk 5:62573be585e9 6 #define MBED_SPI3_H
simon.ford@mbed.co.uk 5:62573be585e9 7
simon.ford@mbed.co.uk 5:62573be585e9 8 #include "Base.h"
simon.ford@mbed.co.uk 5:62573be585e9 9 #include "LPC2300.h"
simon.ford@mbed.co.uk 5:62573be585e9 10
simon.ford@mbed.co.uk 5:62573be585e9 11 namespace mbed {
simon.ford@mbed.co.uk 5:62573be585e9 12
simon.ford@mbed.co.uk 5:62573be585e9 13 /* Class: SPI3
simon.ford@mbed.co.uk 5:62573be585e9 14 * A SPI Master, used for communicating with 3-wire SPI slave devices
simon.ford@mbed.co.uk 5:62573be585e9 15 *
simon.ford@mbed.co.uk 5:62573be585e9 16 * 3-wire SPI devices use the same line for input an output, and should be connected to both
simon.ford@mbed.co.uk 5:62573be585e9 17 * the mosi and miso pins on the mbed Microcontroller
simon.ford@mbed.co.uk 5:62573be585e9 18 */
simon.ford@mbed.co.uk 5:62573be585e9 19
simon.ford@mbed.co.uk 5:62573be585e9 20 class SPI3 : public Base {
simon.ford@mbed.co.uk 5:62573be585e9 21
simon.ford@mbed.co.uk 5:62573be585e9 22 public:
simon.ford@mbed.co.uk 5:62573be585e9 23
simon.ford@mbed.co.uk 5:62573be585e9 24 /* Constructor: SPI3
simon.ford@mbed.co.uk 5:62573be585e9 25 * Create a 3-wire SPI master connected to the specified pins
simon.ford@mbed.co.uk 5:62573be585e9 26 *
simon.ford@mbed.co.uk 5:62573be585e9 27 * Variables:
simon.ford@mbed.co.uk 5:62573be585e9 28 * mosi - SPI Master Out, Slave In pin
simon.ford@mbed.co.uk 5:62573be585e9 29 * miso - SPI Master In, Slave Out pin
simon.ford@mbed.co.uk 5:62573be585e9 30 * sclk - SPI Clock pin
simon.ford@mbed.co.uk 5:62573be585e9 31 *
simon.ford@mbed.co.uk 5:62573be585e9 32 * Pin Options:
simon.ford@mbed.co.uk 5:62573be585e9 33 * (5, 6, 7) or (11, 12, 13)
simon.ford@mbed.co.uk 5:62573be585e9 34 */
simon.ford@mbed.co.uk 5:62573be585e9 35 SPI3(int mosi, int miso, int sclk, const char *name=NULL);
simon.ford@mbed.co.uk 5:62573be585e9 36
simon.ford@mbed.co.uk 5:62573be585e9 37 /* Function: format
simon.ford@mbed.co.uk 5:62573be585e9 38 * Configure the data transmission format
simon.ford@mbed.co.uk 5:62573be585e9 39 *
simon.ford@mbed.co.uk 5:62573be585e9 40 * Variables:
simon.ford@mbed.co.uk 5:62573be585e9 41 * bits - Number of bits per SPI frame (4 - 16, default = 8)
simon.ford@mbed.co.uk 5:62573be585e9 42 * mode - Clock polarity and phase mode (0 - 3, default = 0)
simon.ford@mbed.co.uk 5:62573be585e9 43 *
simon.ford@mbed.co.uk 5:62573be585e9 44 * > mode | POL PHA
simon.ford@mbed.co.uk 5:62573be585e9 45 * > -----+--------
simon.ford@mbed.co.uk 5:62573be585e9 46 * > 0 | 0 0
simon.ford@mbed.co.uk 5:62573be585e9 47 * > 1 | 0 1
simon.ford@mbed.co.uk 5:62573be585e9 48 * > 2 | 1 0
simon.ford@mbed.co.uk 5:62573be585e9 49 * > 3 | 1 1
simon.ford@mbed.co.uk 5:62573be585e9 50 */
simon.ford@mbed.co.uk 5:62573be585e9 51 void format(int bits = 8, int mode = 0);
simon.ford@mbed.co.uk 5:62573be585e9 52
simon.ford@mbed.co.uk 5:62573be585e9 53 // old one...
simon.ford@mbed.co.uk 5:62573be585e9 54 void format(int bits = 8, int polarity = 0, int phase = 0);
simon.ford@mbed.co.uk 5:62573be585e9 55
simon.ford@mbed.co.uk 5:62573be585e9 56 /* Function: frequency
simon.ford@mbed.co.uk 5:62573be585e9 57 * Set the bus clock frequency
simon.ford@mbed.co.uk 5:62573be585e9 58 *
simon.ford@mbed.co.uk 5:62573be585e9 59 * Variables:
simon.ford@mbed.co.uk 5:62573be585e9 60 * hz - SCLK frequency in hz (default = 1MHz)
simon.ford@mbed.co.uk 5:62573be585e9 61 */
simon.ford@mbed.co.uk 5:62573be585e9 62 void frequency(int hz = 1000000);
simon.ford@mbed.co.uk 5:62573be585e9 63
simon.ford@mbed.co.uk 5:62573be585e9 64 /* Function: write
simon.ford@mbed.co.uk 5:62573be585e9 65 * Set the direction to output and write to the SPI Slave
simon.ford@mbed.co.uk 5:62573be585e9 66 *
simon.ford@mbed.co.uk 5:62573be585e9 67 * Variables:
simon.ford@mbed.co.uk 5:62573be585e9 68 * value - Data to be sent to the SPI slave
simon.ford@mbed.co.uk 5:62573be585e9 69 */
simon.ford@mbed.co.uk 5:62573be585e9 70 void write(int value);
simon.ford@mbed.co.uk 5:62573be585e9 71
simon.ford@mbed.co.uk 5:62573be585e9 72 /* Function: read
simon.ford@mbed.co.uk 5:62573be585e9 73 * Set the direction to input, read from the SPI Slave
simon.ford@mbed.co.uk 5:62573be585e9 74 *
simon.ford@mbed.co.uk 5:62573be585e9 75 * Variables:
simon.ford@mbed.co.uk 5:62573be585e9 76 * returns - Response from the SPI slave
simon.ford@mbed.co.uk 5:62573be585e9 77 */
simon.ford@mbed.co.uk 5:62573be585e9 78 int read();
simon.ford@mbed.co.uk 5:62573be585e9 79
simon.ford@mbed.co.uk 5:62573be585e9 80 virtual const struct rpc_method *get_rpc_methods();
simon.ford@mbed.co.uk 5:62573be585e9 81 static struct rpc_class *get_rpc_class();
simon.ford@mbed.co.uk 5:62573be585e9 82
simon.ford@mbed.co.uk 5:62573be585e9 83 protected:
simon.ford@mbed.co.uk 5:62573be585e9 84
simon.ford@mbed.co.uk 5:62573be585e9 85 void configure();
simon.ford@mbed.co.uk 5:62573be585e9 86
simon.ford@mbed.co.uk 5:62573be585e9 87 int _id;
simon.ford@mbed.co.uk 5:62573be585e9 88
simon.ford@mbed.co.uk 5:62573be585e9 89 int _uid;
simon.ford@mbed.co.uk 5:62573be585e9 90 static int _uidcounter;
simon.ford@mbed.co.uk 5:62573be585e9 91
simon.ford@mbed.co.uk 5:62573be585e9 92 int _bits, _polarity, _phase, _hz;
simon.ford@mbed.co.uk 5:62573be585e9 93 static int _config[2];
simon.ford@mbed.co.uk 5:62573be585e9 94 const LPC2300::PortMap* mosi_portmap;
simon.ford@mbed.co.uk 5:62573be585e9 95 };
simon.ford@mbed.co.uk 5:62573be585e9 96
simon.ford@mbed.co.uk 5:62573be585e9 97 }
simon.ford@mbed.co.uk 5:62573be585e9 98
simon.ford@mbed.co.uk 5:62573be585e9 99 #endif
simon.ford@mbed.co.uk 5:62573be585e9 100