CRAC Team / Utilisatio_MX12_V2

Programme d'utilisation des AX12 avec rajout de l'MX12

Fork of test_carteAToutFaire_PR by CRAC Team

mbed/I2C.h@1:f3f702086a30, 2017-05-11 (annotated)

Committer:
ClementBreteau
Date:
Thu May 11 11:49:50 2017 +0000
Revision:
1:f3f702086a30
test de la carte ? tout faire du petit robot

Who changed what in which revision?

UserRevisionLine numberNew contents of line
ClementBreteau 1:f3f702086a30 1 /* mbed Microcontroller Library - I2C
ClementBreteau 1:f3f702086a30 2 * Copyright (c) 2007-2011 ARM Limited. All rights reserved.
ClementBreteau 1:f3f702086a30 3 */
ClementBreteau 1:f3f702086a30 4
ClementBreteau 1:f3f702086a30 5 #ifndef MBED_I2C_H
ClementBreteau 1:f3f702086a30 6 #define MBED_I2C_H
ClementBreteau 1:f3f702086a30 7
ClementBreteau 1:f3f702086a30 8 #include "device.h"
ClementBreteau 1:f3f702086a30 9
ClementBreteau 1:f3f702086a30 10 #if DEVICE_I2C
ClementBreteau 1:f3f702086a30 11
ClementBreteau 1:f3f702086a30 12 #include "platform.h"
ClementBreteau 1:f3f702086a30 13 #include "PinNames.h"
ClementBreteau 1:f3f702086a30 14 #include "PeripheralNames.h"
ClementBreteau 1:f3f702086a30 15 #include "Base.h"
ClementBreteau 1:f3f702086a30 16
ClementBreteau 1:f3f702086a30 17 namespace mbed {
ClementBreteau 1:f3f702086a30 18
ClementBreteau 1:f3f702086a30 19 /* Class: I2C
ClementBreteau 1:f3f702086a30 20 * An I2C Master, used for communicating with I2C slave devices
ClementBreteau 1:f3f702086a30 21 *
ClementBreteau 1:f3f702086a30 22 * Example:
ClementBreteau 1:f3f702086a30 23 * > // Read from I2C slave at address 0x62
ClementBreteau 1:f3f702086a30 24 * >
ClementBreteau 1:f3f702086a30 25 * > #include "mbed.h"
ClementBreteau 1:f3f702086a30 26 * >
ClementBreteau 1:f3f702086a30 27 * > I2C i2c(p28, p27);
ClementBreteau 1:f3f702086a30 28 * >
ClementBreteau 1:f3f702086a30 29 * > int main() {
ClementBreteau 1:f3f702086a30 30 * > int address = 0x62;
ClementBreteau 1:f3f702086a30 31 * > char data[2];
ClementBreteau 1:f3f702086a30 32 * > i2c.read(address, data, 2);
ClementBreteau 1:f3f702086a30 33 * > }
ClementBreteau 1:f3f702086a30 34 */
ClementBreteau 1:f3f702086a30 35 class I2C : public Base {
ClementBreteau 1:f3f702086a30 36
ClementBreteau 1:f3f702086a30 37 public:
ClementBreteau 1:f3f702086a30 38
ClementBreteau 1:f3f702086a30 39 enum RxStatus {
ClementBreteau 1:f3f702086a30 40 NoData
ClementBreteau 1:f3f702086a30 41 , MasterGeneralCall
ClementBreteau 1:f3f702086a30 42 , MasterWrite
ClementBreteau 1:f3f702086a30 43 , MasterRead
ClementBreteau 1:f3f702086a30 44 };
ClementBreteau 1:f3f702086a30 45
ClementBreteau 1:f3f702086a30 46 enum Acknowledge {
ClementBreteau 1:f3f702086a30 47 NoACK = 0
ClementBreteau 1:f3f702086a30 48 , ACK = 1
ClementBreteau 1:f3f702086a30 49 };
ClementBreteau 1:f3f702086a30 50
ClementBreteau 1:f3f702086a30 51 /* Constructor: I2C
ClementBreteau 1:f3f702086a30 52 * Create an I2C Master interface, connected to the specified pins
ClementBreteau 1:f3f702086a30 53 *
ClementBreteau 1:f3f702086a30 54 * Variables:
ClementBreteau 1:f3f702086a30 55 * sda - I2C data line pin
ClementBreteau 1:f3f702086a30 56 * scl - I2C clock line pin
ClementBreteau 1:f3f702086a30 57 */
ClementBreteau 1:f3f702086a30 58 I2C(PinName sda, PinName scl, const char *name = NULL);
ClementBreteau 1:f3f702086a30 59
ClementBreteau 1:f3f702086a30 60 /* Function: frequency
ClementBreteau 1:f3f702086a30 61 * Set the frequency of the I2C interface
ClementBreteau 1:f3f702086a30 62 *
ClementBreteau 1:f3f702086a30 63 * Variables:
ClementBreteau 1:f3f702086a30 64 * hz - The bus frequency in hertz
ClementBreteau 1:f3f702086a30 65 */
ClementBreteau 1:f3f702086a30 66 void frequency(int hz);
ClementBreteau 1:f3f702086a30 67
ClementBreteau 1:f3f702086a30 68 /* Function: read
ClementBreteau 1:f3f702086a30 69 * Read from an I2C slave
ClementBreteau 1:f3f702086a30 70 *
ClementBreteau 1:f3f702086a30 71 * Performs a complete read transaction. The bottom bit of
ClementBreteau 1:f3f702086a30 72 * the address is forced to 1 to indicate a read.
ClementBreteau 1:f3f702086a30 73 *
ClementBreteau 1:f3f702086a30 74 * Variables:
ClementBreteau 1:f3f702086a30 75 * address - 8-bit I2C slave address [ addr | 1 ]
ClementBreteau 1:f3f702086a30 76 * data - Pointer to the byte-array to read data in to
ClementBreteau 1:f3f702086a30 77 * length - Number of bytes to read
ClementBreteau 1:f3f702086a30 78 * repeated - Repeated start, true - don't send stop at end
ClementBreteau 1:f3f702086a30 79 * returns - 0 on success (ack), or non-0 on failure (nack)
ClementBreteau 1:f3f702086a30 80 */
ClementBreteau 1:f3f702086a30 81 int read(int address, char *data, int length, bool repeated = false);
ClementBreteau 1:f3f702086a30 82
ClementBreteau 1:f3f702086a30 83 /* Function: read
ClementBreteau 1:f3f702086a30 84 * Read a single byte from the I2C bus
ClementBreteau 1:f3f702086a30 85 *
ClementBreteau 1:f3f702086a30 86 * Variables:
ClementBreteau 1:f3f702086a30 87 * ack - indicates if the byte is to be acknowledged (1 = acknowledge)
ClementBreteau 1:f3f702086a30 88 * returns - the byte read
ClementBreteau 1:f3f702086a30 89 */
ClementBreteau 1:f3f702086a30 90 int read(int ack);
ClementBreteau 1:f3f702086a30 91
ClementBreteau 1:f3f702086a30 92 /* Function: write
ClementBreteau 1:f3f702086a30 93 * Write to an I2C slave
ClementBreteau 1:f3f702086a30 94 *
ClementBreteau 1:f3f702086a30 95 * Performs a complete write transaction. The bottom bit of
ClementBreteau 1:f3f702086a30 96 * the address is forced to 0 to indicate a write.
ClementBreteau 1:f3f702086a30 97 *
ClementBreteau 1:f3f702086a30 98 * Variables:
ClementBreteau 1:f3f702086a30 99 * address - 8-bit I2C slave address [ addr | 0 ]
ClementBreteau 1:f3f702086a30 100 * data - Pointer to the byte-array data to send
ClementBreteau 1:f3f702086a30 101 * length - Number of bytes to send
ClementBreteau 1:f3f702086a30 102 * repeated - Repeated start, true - do not send stop at end
ClementBreteau 1:f3f702086a30 103 * returns - 0 on success (ack), or non-0 on failure (nack)
ClementBreteau 1:f3f702086a30 104 */
ClementBreteau 1:f3f702086a30 105 int write(int address, const char *data, int length, bool repeated = false);
ClementBreteau 1:f3f702086a30 106
ClementBreteau 1:f3f702086a30 107 /* Function: write
ClementBreteau 1:f3f702086a30 108 * Write single byte out on the I2C bus
ClementBreteau 1:f3f702086a30 109 *
ClementBreteau 1:f3f702086a30 110 * Variables:
ClementBreteau 1:f3f702086a30 111 * data - data to write out on bus
ClementBreteau 1:f3f702086a30 112 * returns - a '1' if an ACK was received, a '0' otherwise
ClementBreteau 1:f3f702086a30 113 */
ClementBreteau 1:f3f702086a30 114 int write(int data);
ClementBreteau 1:f3f702086a30 115
ClementBreteau 1:f3f702086a30 116 /* Function: start
ClementBreteau 1:f3f702086a30 117 * Creates a start condition on the I2C bus
ClementBreteau 1:f3f702086a30 118 */
ClementBreteau 1:f3f702086a30 119
ClementBreteau 1:f3f702086a30 120 void start(void);
ClementBreteau 1:f3f702086a30 121
ClementBreteau 1:f3f702086a30 122 /* Function: stop
ClementBreteau 1:f3f702086a30 123 * Creates a stop condition on the I2C bus
ClementBreteau 1:f3f702086a30 124 */
ClementBreteau 1:f3f702086a30 125 void stop(void);
ClementBreteau 1:f3f702086a30 126
ClementBreteau 1:f3f702086a30 127 protected:
ClementBreteau 1:f3f702086a30 128
ClementBreteau 1:f3f702086a30 129 void aquire();
ClementBreteau 1:f3f702086a30 130
ClementBreteau 1:f3f702086a30 131 I2CName _i2c;
ClementBreteau 1:f3f702086a30 132 static I2C *_owner;
ClementBreteau 1:f3f702086a30 133 int _hz;
ClementBreteau 1:f3f702086a30 134
ClementBreteau 1:f3f702086a30 135 };
ClementBreteau 1:f3f702086a30 136
ClementBreteau 1:f3f702086a30 137 } // namespace mbed
ClementBreteau 1:f3f702086a30 138
ClementBreteau 1:f3f702086a30 139 #endif
ClementBreteau 1:f3f702086a30 140
ClementBreteau 1:f3f702086a30 141 #endif
ClementBreteau 1:f3f702086a30 142