Hideharu Tsunemoto / Mbed 2 deprecated SmallDoseMeter_Single_AE_LPC11U35

LPC11U35 ADC Tick & USBSerial

Dependencies:   mbed

Dependents:   SmallDoseMeter_SingleCH_AE_lpc11u35_V1_00

mbed/I2CSlave.h@1:b1a3be5f48ab, 2018-02-19 (annotated)

Committer:
H_Tsunemoto
Date:
Mon Feb 19 09:09:52 2018 +0000
Revision:
1:b1a3be5f48ab
Parent:
0:871ab6846b18 
test

Who changed what in which revision?

UserRevisionLine numberNew contents of line
H_Tsunemoto 0:871ab6846b18 1 /* mbed Microcontroller Library
H_Tsunemoto 0:871ab6846b18 2 * Copyright (c) 2006-2013 ARM Limited
H_Tsunemoto 0:871ab6846b18 3 *
H_Tsunemoto 0:871ab6846b18 4 * Licensed under the Apache License, Version 2.0 (the "License");
H_Tsunemoto 0:871ab6846b18 5 * you may not use this file except in compliance with the License.
H_Tsunemoto 0:871ab6846b18 6 * You may obtain a copy of the License at
H_Tsunemoto 0:871ab6846b18 7 *
H_Tsunemoto 0:871ab6846b18 8 * http://www.apache.org/licenses/LICENSE-2.0
H_Tsunemoto 0:871ab6846b18 9 *
H_Tsunemoto 0:871ab6846b18 10 * Unless required by applicable law or agreed to in writing, software
H_Tsunemoto 0:871ab6846b18 11 * distributed under the License is distributed on an "AS IS" BASIS,
H_Tsunemoto 0:871ab6846b18 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
H_Tsunemoto 0:871ab6846b18 13 * See the License for the specific language governing permissions and
H_Tsunemoto 0:871ab6846b18 14 * limitations under the License.
H_Tsunemoto 0:871ab6846b18 15 */
H_Tsunemoto 0:871ab6846b18 16 #ifndef MBED_I2C_SLAVE_H
H_Tsunemoto 0:871ab6846b18 17 #define MBED_I2C_SLAVE_H
H_Tsunemoto 0:871ab6846b18 18
H_Tsunemoto 0:871ab6846b18 19 #include "platform.h"
H_Tsunemoto 0:871ab6846b18 20
H_Tsunemoto 0:871ab6846b18 21 #if DEVICE_I2CSLAVE
H_Tsunemoto 0:871ab6846b18 22
H_Tsunemoto 0:871ab6846b18 23 #include "i2c_api.h"
H_Tsunemoto 0:871ab6846b18 24
H_Tsunemoto 0:871ab6846b18 25 namespace mbed {
H_Tsunemoto 0:871ab6846b18 26
H_Tsunemoto 0:871ab6846b18 27 /** An I2C Slave, used for communicating with an I2C Master device
H_Tsunemoto 0:871ab6846b18 28 *
H_Tsunemoto 0:871ab6846b18 29 * Example:
H_Tsunemoto 0:871ab6846b18 30 * @code
H_Tsunemoto 0:871ab6846b18 31 * // Simple I2C responder
H_Tsunemoto 0:871ab6846b18 32 * #include <mbed.h>
H_Tsunemoto 0:871ab6846b18 33 *
H_Tsunemoto 0:871ab6846b18 34 * I2CSlave slave(p9, p10);
H_Tsunemoto 0:871ab6846b18 35 *
H_Tsunemoto 0:871ab6846b18 36 * int main() {
H_Tsunemoto 0:871ab6846b18 37 * char buf[10];
H_Tsunemoto 0:871ab6846b18 38 * char msg[] = "Slave!";
H_Tsunemoto 0:871ab6846b18 39 *
H_Tsunemoto 0:871ab6846b18 40 * slave.address(0xA0);
H_Tsunemoto 0:871ab6846b18 41 * while (1) {
H_Tsunemoto 0:871ab6846b18 42 * int i = slave.receive();
H_Tsunemoto 0:871ab6846b18 43 * switch (i) {
H_Tsunemoto 0:871ab6846b18 44 * case I2CSlave::ReadAddressed:
H_Tsunemoto 0:871ab6846b18 45 * slave.write(msg, strlen(msg) + 1); // Includes null char
H_Tsunemoto 0:871ab6846b18 46 * break;
H_Tsunemoto 0:871ab6846b18 47 * case I2CSlave::WriteGeneral:
H_Tsunemoto 0:871ab6846b18 48 * slave.read(buf, 10);
H_Tsunemoto 0:871ab6846b18 49 * printf("Read G: %s\n", buf);
H_Tsunemoto 0:871ab6846b18 50 * break;
H_Tsunemoto 0:871ab6846b18 51 * case I2CSlave::WriteAddressed:
H_Tsunemoto 0:871ab6846b18 52 * slave.read(buf, 10);
H_Tsunemoto 0:871ab6846b18 53 * printf("Read A: %s\n", buf);
H_Tsunemoto 0:871ab6846b18 54 * break;
H_Tsunemoto 0:871ab6846b18 55 * }
H_Tsunemoto 0:871ab6846b18 56 * for(int i = 0; i < 10; i++) buf[i] = 0; // Clear buffer
H_Tsunemoto 0:871ab6846b18 57 * }
H_Tsunemoto 0:871ab6846b18 58 * }
H_Tsunemoto 0:871ab6846b18 59 * @endcode
H_Tsunemoto 0:871ab6846b18 60 */
H_Tsunemoto 0:871ab6846b18 61 class I2CSlave {
H_Tsunemoto 0:871ab6846b18 62
H_Tsunemoto 0:871ab6846b18 63 public:
H_Tsunemoto 0:871ab6846b18 64 enum RxStatus {
H_Tsunemoto 0:871ab6846b18 65 NoData = 0,
H_Tsunemoto 0:871ab6846b18 66 ReadAddressed = 1,
H_Tsunemoto 0:871ab6846b18 67 WriteGeneral = 2,
H_Tsunemoto 0:871ab6846b18 68 WriteAddressed = 3
H_Tsunemoto 0:871ab6846b18 69 };
H_Tsunemoto 0:871ab6846b18 70
H_Tsunemoto 0:871ab6846b18 71 /** Create an I2C Slave interface, connected to the specified pins.
H_Tsunemoto 0:871ab6846b18 72 *
H_Tsunemoto 0:871ab6846b18 73 * @param sda I2C data line pin
H_Tsunemoto 0:871ab6846b18 74 * @param scl I2C clock line pin
H_Tsunemoto 0:871ab6846b18 75 */
H_Tsunemoto 0:871ab6846b18 76 I2CSlave(PinName sda, PinName scl);
H_Tsunemoto 0:871ab6846b18 77
H_Tsunemoto 0:871ab6846b18 78 /** Set the frequency of the I2C interface
H_Tsunemoto 0:871ab6846b18 79 *
H_Tsunemoto 0:871ab6846b18 80 * @param hz The bus frequency in hertz
H_Tsunemoto 0:871ab6846b18 81 */
H_Tsunemoto 0:871ab6846b18 82 void frequency(int hz);
H_Tsunemoto 0:871ab6846b18 83
H_Tsunemoto 0:871ab6846b18 84 /** Checks to see if this I2C Slave has been addressed.
H_Tsunemoto 0:871ab6846b18 85 *
H_Tsunemoto 0:871ab6846b18 86 * @returns
H_Tsunemoto 0:871ab6846b18 87 * A status indicating if the device has been addressed, and how
H_Tsunemoto 0:871ab6846b18 88 * - NoData - the slave has not been addressed
H_Tsunemoto 0:871ab6846b18 89 * - ReadAddressed - the master has requested a read from this slave
H_Tsunemoto 0:871ab6846b18 90 * - WriteAddressed - the master is writing to this slave
H_Tsunemoto 0:871ab6846b18 91 * - WriteGeneral - the master is writing to all slave
H_Tsunemoto 0:871ab6846b18 92 */
H_Tsunemoto 0:871ab6846b18 93 int receive(void);
H_Tsunemoto 0:871ab6846b18 94
H_Tsunemoto 0:871ab6846b18 95 /** Read from an I2C master.
H_Tsunemoto 0:871ab6846b18 96 *
H_Tsunemoto 0:871ab6846b18 97 * @param data pointer to the byte array to read data in to
H_Tsunemoto 0:871ab6846b18 98 * @param length maximum number of bytes to read
H_Tsunemoto 0:871ab6846b18 99 *
H_Tsunemoto 0:871ab6846b18 100 * @returns
H_Tsunemoto 0:871ab6846b18 101 * 0 on success,
H_Tsunemoto 0:871ab6846b18 102 * non-0 otherwise
H_Tsunemoto 0:871ab6846b18 103 */
H_Tsunemoto 0:871ab6846b18 104 int read(char *data, int length);
H_Tsunemoto 0:871ab6846b18 105
H_Tsunemoto 0:871ab6846b18 106 /** Read a single byte from an I2C master.
H_Tsunemoto 0:871ab6846b18 107 *
H_Tsunemoto 0:871ab6846b18 108 * @returns
H_Tsunemoto 0:871ab6846b18 109 * the byte read
H_Tsunemoto 0:871ab6846b18 110 */
H_Tsunemoto 0:871ab6846b18 111 int read(void);
H_Tsunemoto 0:871ab6846b18 112
H_Tsunemoto 0:871ab6846b18 113 /** Write to an I2C master.
H_Tsunemoto 0:871ab6846b18 114 *
H_Tsunemoto 0:871ab6846b18 115 * @param data pointer to the byte array to be transmitted
H_Tsunemoto 0:871ab6846b18 116 * @param length the number of bytes to transmite
H_Tsunemoto 0:871ab6846b18 117 *
H_Tsunemoto 0:871ab6846b18 118 * @returns
H_Tsunemoto 0:871ab6846b18 119 * 0 on success,
H_Tsunemoto 0:871ab6846b18 120 * non-0 otherwise
H_Tsunemoto 0:871ab6846b18 121 */
H_Tsunemoto 0:871ab6846b18 122 int write(const char *data, int length);
H_Tsunemoto 0:871ab6846b18 123
H_Tsunemoto 0:871ab6846b18 124 /** Write a single byte to an I2C master.
H_Tsunemoto 0:871ab6846b18 125 *
H_Tsunemoto 0:871ab6846b18 126 * @data the byte to write
H_Tsunemoto 0:871ab6846b18 127 *
H_Tsunemoto 0:871ab6846b18 128 * @returns
H_Tsunemoto 0:871ab6846b18 129 * '1' if an ACK was received,
H_Tsunemoto 0:871ab6846b18 130 * '0' otherwise
H_Tsunemoto 0:871ab6846b18 131 */
H_Tsunemoto 0:871ab6846b18 132 int write(int data);
H_Tsunemoto 0:871ab6846b18 133
H_Tsunemoto 0:871ab6846b18 134 /** Sets the I2C slave address.
H_Tsunemoto 0:871ab6846b18 135 *
H_Tsunemoto 0:871ab6846b18 136 * @param address The address to set for the slave (ignoring the least
H_Tsunemoto 0:871ab6846b18 137 * signifcant bit). If set to 0, the slave will only respond to the
H_Tsunemoto 0:871ab6846b18 138 * general call address.
H_Tsunemoto 0:871ab6846b18 139 */
H_Tsunemoto 0:871ab6846b18 140 void address(int address);
H_Tsunemoto 0:871ab6846b18 141
H_Tsunemoto 0:871ab6846b18 142 /** Reset the I2C slave back into the known ready receiving state.
H_Tsunemoto 0:871ab6846b18 143 */
H_Tsunemoto 0:871ab6846b18 144 void stop(void);
H_Tsunemoto 0:871ab6846b18 145
H_Tsunemoto 0:871ab6846b18 146 protected:
H_Tsunemoto 0:871ab6846b18 147 i2c_t _i2c;
H_Tsunemoto 0:871ab6846b18 148 };
H_Tsunemoto 0:871ab6846b18 149
H_Tsunemoto 0:871ab6846b18 150 } // namespace mbed
H_Tsunemoto 0:871ab6846b18 151
H_Tsunemoto 0:871ab6846b18 152 #endif
H_Tsunemoto 0:871ab6846b18 153
H_Tsunemoto 0:871ab6846b18 154 #endif