Gan likun / mbed-dev

00

drivers/I2CSlave.cpp@0:13413ea9a877, 2022-06-12 (annotated)

Committer:
ganlikun
Date:
Sun Jun 12 14:02:44 2022 +0000
Revision:
0:13413ea9a877
00

Who changed what in which revision?

UserRevisionLine numberNew contents of line
ganlikun 0:13413ea9a877 1 /* mbed Microcontroller Library
ganlikun 0:13413ea9a877 2 * Copyright (c) 2006-2013 ARM Limited
ganlikun 0:13413ea9a877 3 *
ganlikun 0:13413ea9a877 4 * Licensed under the Apache License, Version 2.0 (the "License");
ganlikun 0:13413ea9a877 5 * you may not use this file except in compliance with the License.
ganlikun 0:13413ea9a877 6 * You may obtain a copy of the License at
ganlikun 0:13413ea9a877 7 *
ganlikun 0:13413ea9a877 8 * http://www.apache.org/licenses/LICENSE-2.0
ganlikun 0:13413ea9a877 9 *
ganlikun 0:13413ea9a877 10 * Unless required by applicable law or agreed to in writing, software
ganlikun 0:13413ea9a877 11 * distributed under the License is distributed on an "AS IS" BASIS,
ganlikun 0:13413ea9a877 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
ganlikun 0:13413ea9a877 13 * See the License for the specific language governing permissions and
ganlikun 0:13413ea9a877 14 * limitations under the License.
ganlikun 0:13413ea9a877 15 */
ganlikun 0:13413ea9a877 16 #include "drivers/I2CSlave.h"
ganlikun 0:13413ea9a877 17
ganlikun 0:13413ea9a877 18 #if DEVICE_I2CSLAVE
ganlikun 0:13413ea9a877 19
ganlikun 0:13413ea9a877 20 namespace mbed {
ganlikun 0:13413ea9a877 21
ganlikun 0:13413ea9a877 22 I2CSlave::I2CSlave(PinName sda, PinName scl) : _i2c() {
ganlikun 0:13413ea9a877 23 i2c_init(&_i2c, sda, scl);
ganlikun 0:13413ea9a877 24 i2c_frequency(&_i2c, 100000);
ganlikun 0:13413ea9a877 25 i2c_slave_mode(&_i2c, 1);
ganlikun 0:13413ea9a877 26 }
ganlikun 0:13413ea9a877 27
ganlikun 0:13413ea9a877 28 void I2CSlave::frequency(int hz) {
ganlikun 0:13413ea9a877 29 i2c_frequency(&_i2c, hz);
ganlikun 0:13413ea9a877 30 }
ganlikun 0:13413ea9a877 31
ganlikun 0:13413ea9a877 32 void I2CSlave::address(int address) {
ganlikun 0:13413ea9a877 33 int addr = (address & 0xFF) | 1;
ganlikun 0:13413ea9a877 34 i2c_slave_address(&_i2c, 0, addr, 0);
ganlikun 0:13413ea9a877 35 }
ganlikun 0:13413ea9a877 36
ganlikun 0:13413ea9a877 37 int I2CSlave::receive(void) {
ganlikun 0:13413ea9a877 38 return i2c_slave_receive(&_i2c);
ganlikun 0:13413ea9a877 39 }
ganlikun 0:13413ea9a877 40
ganlikun 0:13413ea9a877 41 int I2CSlave::read(char *data, int length) {
ganlikun 0:13413ea9a877 42 return i2c_slave_read(&_i2c, data, length) != length;
ganlikun 0:13413ea9a877 43 }
ganlikun 0:13413ea9a877 44
ganlikun 0:13413ea9a877 45 int I2CSlave::read(void) {
ganlikun 0:13413ea9a877 46 return i2c_byte_read(&_i2c, 0);
ganlikun 0:13413ea9a877 47 }
ganlikun 0:13413ea9a877 48
ganlikun 0:13413ea9a877 49 int I2CSlave::write(const char *data, int length) {
ganlikun 0:13413ea9a877 50 return i2c_slave_write(&_i2c, data, length) != length;
ganlikun 0:13413ea9a877 51 }
ganlikun 0:13413ea9a877 52
ganlikun 0:13413ea9a877 53 int I2CSlave::write(int data) {
ganlikun 0:13413ea9a877 54 return i2c_byte_write(&_i2c, data);
ganlikun 0:13413ea9a877 55 }
ganlikun 0:13413ea9a877 56
ganlikun 0:13413ea9a877 57 void I2CSlave::stop(void) {
ganlikun 0:13413ea9a877 58 i2c_stop(&_i2c);
ganlikun 0:13413ea9a877 59 }
ganlikun 0:13413ea9a877 60
ganlikun 0:13413ea9a877 61 }
ganlikun 0:13413ea9a877 62
ganlikun 0:13413ea9a877 63 #endif
ganlikun 0:13413ea9a877 64