不韋 呂 / F746_SD_BitmapViewer

microSD カードのビットマップ･ファイルのビュアー．画像の最大値　縦：272ピクセル，横：480ピクセル． Bitmap file viewer for microSD card. Maximum size Vertical: 272 pixels, Horizontal: 480.

Dependencies:   SDFileSystem_Warning_Fixed F746_GUI

mbed_src_STM32F7/common/I2C.cpp@1:bb146d5fe9aa, 2018-10-23 (annotated)

Committer:
MikamiUitOpen
Date:
Tue Oct 23 11:51:47 2018 +0000
Revision:
1:bb146d5fe9aa
Parent:
0:f62ffd3644bf 
2

Who changed what in which revision?

UserRevisionLine numberNew contents of line
MikamiUitOpen 0:f62ffd3644bf 1 /* mbed Microcontroller Library
MikamiUitOpen 0:f62ffd3644bf 2 * Copyright (c) 2006-2015 ARM Limited
MikamiUitOpen 0:f62ffd3644bf 3 *
MikamiUitOpen 0:f62ffd3644bf 4 * Licensed under the Apache License, Version 2.0 (the "License");
MikamiUitOpen 0:f62ffd3644bf 5 * you may not use this file except in compliance with the License.
MikamiUitOpen 0:f62ffd3644bf 6 * You may obtain a copy of the License at
MikamiUitOpen 0:f62ffd3644bf 7 *
MikamiUitOpen 0:f62ffd3644bf 8 * http://www.apache.org/licenses/LICENSE-2.0
MikamiUitOpen 0:f62ffd3644bf 9 *
MikamiUitOpen 0:f62ffd3644bf 10 * Unless required by applicable law or agreed to in writing, software
MikamiUitOpen 0:f62ffd3644bf 11 * distributed under the License is distributed on an "AS IS" BASIS,
MikamiUitOpen 0:f62ffd3644bf 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
MikamiUitOpen 0:f62ffd3644bf 13 * See the License for the specific language governing permissions and
MikamiUitOpen 0:f62ffd3644bf 14 * limitations under the License.
MikamiUitOpen 0:f62ffd3644bf 15 */
MikamiUitOpen 0:f62ffd3644bf 16 #include "I2C.h"
MikamiUitOpen 0:f62ffd3644bf 17
MikamiUitOpen 0:f62ffd3644bf 18 #if DEVICE_I2C
MikamiUitOpen 0:f62ffd3644bf 19
MikamiUitOpen 0:f62ffd3644bf 20 namespace mbed {
MikamiUitOpen 0:f62ffd3644bf 21
MikamiUitOpen 0:f62ffd3644bf 22 I2C *I2C::_owner = NULL;
MikamiUitOpen 0:f62ffd3644bf 23
MikamiUitOpen 0:f62ffd3644bf 24 I2C::I2C(PinName sda, PinName scl) :
MikamiUitOpen 0:f62ffd3644bf 25 #if DEVICE_I2C_ASYNCH
MikamiUitOpen 0:f62ffd3644bf 26 _irq(this), _usage(DMA_USAGE_NEVER),
MikamiUitOpen 0:f62ffd3644bf 27 #endif
MikamiUitOpen 0:f62ffd3644bf 28 _i2c(), _hz(100000) {
MikamiUitOpen 0:f62ffd3644bf 29 // The init function also set the frequency to 100000
MikamiUitOpen 0:f62ffd3644bf 30 i2c_init(&_i2c, sda, scl);
MikamiUitOpen 0:f62ffd3644bf 31
MikamiUitOpen 0:f62ffd3644bf 32 // Used to avoid unnecessary frequency updates
MikamiUitOpen 0:f62ffd3644bf 33 _owner = this;
MikamiUitOpen 0:f62ffd3644bf 34 }
MikamiUitOpen 0:f62ffd3644bf 35
MikamiUitOpen 0:f62ffd3644bf 36 void I2C::frequency(int hz) {
MikamiUitOpen 0:f62ffd3644bf 37 _hz = hz;
MikamiUitOpen 0:f62ffd3644bf 38
MikamiUitOpen 0:f62ffd3644bf 39 // We want to update the frequency even if we are already the bus owners
MikamiUitOpen 0:f62ffd3644bf 40 i2c_frequency(&_i2c, _hz);
MikamiUitOpen 0:f62ffd3644bf 41
MikamiUitOpen 0:f62ffd3644bf 42 // Updating the frequency of the bus we become the owners of it
MikamiUitOpen 0:f62ffd3644bf 43 _owner = this;
MikamiUitOpen 0:f62ffd3644bf 44 }
MikamiUitOpen 0:f62ffd3644bf 45
MikamiUitOpen 0:f62ffd3644bf 46 void I2C::aquire() {
MikamiUitOpen 0:f62ffd3644bf 47 if (_owner != this) {
MikamiUitOpen 0:f62ffd3644bf 48 i2c_frequency(&_i2c, _hz);
MikamiUitOpen 0:f62ffd3644bf 49 _owner = this;
MikamiUitOpen 0:f62ffd3644bf 50 }
MikamiUitOpen 0:f62ffd3644bf 51 }
MikamiUitOpen 0:f62ffd3644bf 52
MikamiUitOpen 0:f62ffd3644bf 53 // write - Master Transmitter Mode
MikamiUitOpen 0:f62ffd3644bf 54 int I2C::write(int address, const char* data, int length, bool repeated) {
MikamiUitOpen 0:f62ffd3644bf 55 aquire();
MikamiUitOpen 0:f62ffd3644bf 56
MikamiUitOpen 0:f62ffd3644bf 57 int stop = (repeated) ? 0 : 1;
MikamiUitOpen 0:f62ffd3644bf 58 int written = i2c_write(&_i2c, address, data, length, stop);
MikamiUitOpen 0:f62ffd3644bf 59
MikamiUitOpen 0:f62ffd3644bf 60 return length != written;
MikamiUitOpen 0:f62ffd3644bf 61 }
MikamiUitOpen 0:f62ffd3644bf 62
MikamiUitOpen 0:f62ffd3644bf 63 int I2C::write(int data) {
MikamiUitOpen 0:f62ffd3644bf 64 return i2c_byte_write(&_i2c, data);
MikamiUitOpen 0:f62ffd3644bf 65 }
MikamiUitOpen 0:f62ffd3644bf 66
MikamiUitOpen 0:f62ffd3644bf 67 // read - Master Reciever Mode
MikamiUitOpen 0:f62ffd3644bf 68 int I2C::read(int address, char* data, int length, bool repeated) {
MikamiUitOpen 0:f62ffd3644bf 69 aquire();
MikamiUitOpen 0:f62ffd3644bf 70
MikamiUitOpen 0:f62ffd3644bf 71 int stop = (repeated) ? 0 : 1;
MikamiUitOpen 0:f62ffd3644bf 72 int read = i2c_read(&_i2c, address, data, length, stop);
MikamiUitOpen 0:f62ffd3644bf 73
MikamiUitOpen 0:f62ffd3644bf 74 return length != read;
MikamiUitOpen 0:f62ffd3644bf 75 }
MikamiUitOpen 0:f62ffd3644bf 76
MikamiUitOpen 0:f62ffd3644bf 77 int I2C::read(int ack) {
MikamiUitOpen 0:f62ffd3644bf 78 if (ack) {
MikamiUitOpen 0:f62ffd3644bf 79 return i2c_byte_read(&_i2c, 0);
MikamiUitOpen 0:f62ffd3644bf 80 } else {
MikamiUitOpen 0:f62ffd3644bf 81 return i2c_byte_read(&_i2c, 1);
MikamiUitOpen 0:f62ffd3644bf 82 }
MikamiUitOpen 0:f62ffd3644bf 83 }
MikamiUitOpen 0:f62ffd3644bf 84
MikamiUitOpen 0:f62ffd3644bf 85 void I2C::start(void) {
MikamiUitOpen 0:f62ffd3644bf 86 i2c_start(&_i2c);
MikamiUitOpen 0:f62ffd3644bf 87 }
MikamiUitOpen 0:f62ffd3644bf 88
MikamiUitOpen 0:f62ffd3644bf 89 void I2C::stop(void) {
MikamiUitOpen 0:f62ffd3644bf 90 i2c_stop(&_i2c);
MikamiUitOpen 0:f62ffd3644bf 91 }
MikamiUitOpen 0:f62ffd3644bf 92
MikamiUitOpen 0:f62ffd3644bf 93 #if DEVICE_I2C_ASYNCH
MikamiUitOpen 0:f62ffd3644bf 94
MikamiUitOpen 0:f62ffd3644bf 95 int I2C::transfer(int address, const char *tx_buffer, int tx_length, char *rx_buffer, int rx_length, const event_callback_t& callback, int event, bool repeated)
MikamiUitOpen 0:f62ffd3644bf 96 {
MikamiUitOpen 0:f62ffd3644bf 97 if (i2c_active(&_i2c)) {
MikamiUitOpen 0:f62ffd3644bf 98 return -1; // transaction ongoing
MikamiUitOpen 0:f62ffd3644bf 99 }
MikamiUitOpen 0:f62ffd3644bf 100 aquire();
MikamiUitOpen 0:f62ffd3644bf 101
MikamiUitOpen 0:f62ffd3644bf 102 _callback = callback;
MikamiUitOpen 0:f62ffd3644bf 103 int stop = (repeated) ? 0 : 1;
MikamiUitOpen 0:f62ffd3644bf 104 _irq.callback(&I2C::irq_handler_asynch);
MikamiUitOpen 0:f62ffd3644bf 105 i2c_transfer_asynch(&_i2c, (void *)tx_buffer, tx_length, (void *)rx_buffer, rx_length, address, stop, _irq.entry(), event, _usage);
MikamiUitOpen 0:f62ffd3644bf 106 return 0;
MikamiUitOpen 0:f62ffd3644bf 107 }
MikamiUitOpen 0:f62ffd3644bf 108
MikamiUitOpen 0:f62ffd3644bf 109 void I2C::abort_transfer(void)
MikamiUitOpen 0:f62ffd3644bf 110 {
MikamiUitOpen 0:f62ffd3644bf 111 i2c_abort_asynch(&_i2c);
MikamiUitOpen 0:f62ffd3644bf 112 }
MikamiUitOpen 0:f62ffd3644bf 113
MikamiUitOpen 0:f62ffd3644bf 114 void I2C::irq_handler_asynch(void)
MikamiUitOpen 0:f62ffd3644bf 115 {
MikamiUitOpen 0:f62ffd3644bf 116 int event = i2c_irq_handler_asynch(&_i2c);
MikamiUitOpen 0:f62ffd3644bf 117 if (_callback && event) {
MikamiUitOpen 0:f62ffd3644bf 118 _callback.call(event);
MikamiUitOpen 0:f62ffd3644bf 119 }
MikamiUitOpen 0:f62ffd3644bf 120
MikamiUitOpen 0:f62ffd3644bf 121 }
MikamiUitOpen 0:f62ffd3644bf 122
MikamiUitOpen 0:f62ffd3644bf 123
MikamiUitOpen 0:f62ffd3644bf 124 #endif
MikamiUitOpen 0:f62ffd3644bf 125
MikamiUitOpen 0:f62ffd3644bf 126 } // namespace mbed
MikamiUitOpen 0:f62ffd3644bf 127
MikamiUitOpen 0:f62ffd3644bf 128 #endif