La Suno / Mbed 2 deprecated afero_poc15_180403

I2C hang recover function added

Dependencies:   UniGraphic mbed vt100

In this version, check_i2c_pins function was added in edge_mgr.cpp.

プログラムの起動時、I2Cモジュールを初期化する前に、I2Cに使用するピンの電位を確認し
もし一方でも Low に張り付いていた場合、SCL を GPIO 出力に設定して　
所定回数 (I2C_UNLOCK_TRIAL_CYCLE) 反転させることにより、疑似リセットクロックを生成します。

その後は、通常の起動手順に復帰し、以降はこれまでと同様の動作をします。

afLib/StatusCommand.cpp@0:d895cd1cd897, 2018-04-03 (annotated)

Committer:
Rhyme
Date:
Tue Apr 03 08:30:29 2018 +0000
Revision:
0:d895cd1cd897
Initial I2C Pin force reset function added

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Rhyme 0:d895cd1cd897 1 /**
Rhyme 0:d895cd1cd897 2 * Copyright 2015 Afero, Inc.
Rhyme 0:d895cd1cd897 3 *
Rhyme 0:d895cd1cd897 4 * Licensed under the Apache License, Version 2.0 (the "License");
Rhyme 0:d895cd1cd897 5 * you may not use this file except in compliance with the License.
Rhyme 0:d895cd1cd897 6 * You may obtain a copy of the License at
Rhyme 0:d895cd1cd897 7 *
Rhyme 0:d895cd1cd897 8 * http://www.apache.org/licenses/LICENSE-2.0
Rhyme 0:d895cd1cd897 9 *
Rhyme 0:d895cd1cd897 10 * Unless required by applicable law or agreed to in writing, software
Rhyme 0:d895cd1cd897 11 * distributed under the License is distributed on an "AS IS" BASIS,
Rhyme 0:d895cd1cd897 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
Rhyme 0:d895cd1cd897 13 * See the License for the specific language governing permissions and
Rhyme 0:d895cd1cd897 14 * limitations under the License.
Rhyme 0:d895cd1cd897 15 */
Rhyme 0:d895cd1cd897 16
Rhyme 0:d895cd1cd897 17 #include "StatusCommand.h"
Rhyme 0:d895cd1cd897 18
Rhyme 0:d895cd1cd897 19 #define SERIAL_PRINT_DBG_ASR_ON 0
Rhyme 0:d895cd1cd897 20
Rhyme 0:d895cd1cd897 21 StatusCommand::StatusCommand(uint16_t bytesToSend) {
Rhyme 0:d895cd1cd897 22 _cmd = 0x30;
Rhyme 0:d895cd1cd897 23 _bytesToSend = bytesToSend;
Rhyme 0:d895cd1cd897 24 _bytesToRecv = 0;
Rhyme 0:d895cd1cd897 25 }
Rhyme 0:d895cd1cd897 26
Rhyme 0:d895cd1cd897 27 StatusCommand::StatusCommand() {
Rhyme 0:d895cd1cd897 28 _cmd = 0x30;
Rhyme 0:d895cd1cd897 29 _bytesToSend = 0;
Rhyme 0:d895cd1cd897 30 _bytesToRecv = 0;
Rhyme 0:d895cd1cd897 31 }
Rhyme 0:d895cd1cd897 32
Rhyme 0:d895cd1cd897 33 StatusCommand::~StatusCommand() {
Rhyme 0:d895cd1cd897 34 }
Rhyme 0:d895cd1cd897 35
Rhyme 0:d895cd1cd897 36 uint16_t StatusCommand::getSize() {
Rhyme 0:d895cd1cd897 37 return sizeof(_cmd) + sizeof(_bytesToSend) + sizeof(_bytesToRecv);
Rhyme 0:d895cd1cd897 38 }
Rhyme 0:d895cd1cd897 39
Rhyme 0:d895cd1cd897 40 uint16_t StatusCommand::getBytes(int *bytes) {
Rhyme 0:d895cd1cd897 41 int index = 0;
Rhyme 0:d895cd1cd897 42
Rhyme 0:d895cd1cd897 43 bytes[index++] = (_cmd);
Rhyme 0:d895cd1cd897 44 bytes[index++] = (_bytesToSend & 0xff);
Rhyme 0:d895cd1cd897 45 bytes[index++] = ((_bytesToSend >> 8) & 0xff);
Rhyme 0:d895cd1cd897 46 bytes[index++] = (_bytesToRecv & 0xff);
Rhyme 0:d895cd1cd897 47 bytes[index++] = ((_bytesToRecv >> 8) & 0xff);
Rhyme 0:d895cd1cd897 48
Rhyme 0:d895cd1cd897 49 return index;
Rhyme 0:d895cd1cd897 50 }
Rhyme 0:d895cd1cd897 51
Rhyme 0:d895cd1cd897 52 uint8_t StatusCommand::calcChecksum() {
Rhyme 0:d895cd1cd897 53 uint8_t result = 0;
Rhyme 0:d895cd1cd897 54
Rhyme 0:d895cd1cd897 55 result += (_cmd);
Rhyme 0:d895cd1cd897 56 result += (_bytesToSend & 0xff);
Rhyme 0:d895cd1cd897 57 result += ((_bytesToSend >> 8) & 0xff);
Rhyme 0:d895cd1cd897 58 result += (_bytesToRecv & 0xff);
Rhyme 0:d895cd1cd897 59 result += ((_bytesToRecv >> 8) & 0xff);
Rhyme 0:d895cd1cd897 60
Rhyme 0:d895cd1cd897 61 return result;
Rhyme 0:d895cd1cd897 62 }
Rhyme 0:d895cd1cd897 63
Rhyme 0:d895cd1cd897 64 void StatusCommand::setChecksum(uint8_t checksum) {
Rhyme 0:d895cd1cd897 65 _checksum = checksum;
Rhyme 0:d895cd1cd897 66 }
Rhyme 0:d895cd1cd897 67
Rhyme 0:d895cd1cd897 68 uint8_t StatusCommand::getChecksum() {
Rhyme 0:d895cd1cd897 69 uint8_t result = 0;
Rhyme 0:d895cd1cd897 70
Rhyme 0:d895cd1cd897 71 result += (_cmd);
Rhyme 0:d895cd1cd897 72 result += (_bytesToSend & 0xff);
Rhyme 0:d895cd1cd897 73 result += ((_bytesToSend >> 8) & 0xff);
Rhyme 0:d895cd1cd897 74 result += (_bytesToRecv & 0xff);
Rhyme 0:d895cd1cd897 75 result += ((_bytesToRecv >> 8) & 0xff);
Rhyme 0:d895cd1cd897 76
Rhyme 0:d895cd1cd897 77 return result;
Rhyme 0:d895cd1cd897 78 }
Rhyme 0:d895cd1cd897 79
Rhyme 0:d895cd1cd897 80 void StatusCommand::setAck(bool ack) {
Rhyme 0:d895cd1cd897 81 _cmd = ack ? 0x31 : 0x30;
Rhyme 0:d895cd1cd897 82 }
Rhyme 0:d895cd1cd897 83
Rhyme 0:d895cd1cd897 84 void StatusCommand::setBytesToSend(uint16_t bytesToSend) {
Rhyme 0:d895cd1cd897 85 _bytesToSend = bytesToSend;
Rhyme 0:d895cd1cd897 86 }
Rhyme 0:d895cd1cd897 87
Rhyme 0:d895cd1cd897 88 uint16_t StatusCommand::getBytesToSend() {
Rhyme 0:d895cd1cd897 89 return _bytesToSend;
Rhyme 0:d895cd1cd897 90 }
Rhyme 0:d895cd1cd897 91
Rhyme 0:d895cd1cd897 92 void StatusCommand::setBytesToRecv(uint16_t bytesToRecv) {
Rhyme 0:d895cd1cd897 93 _bytesToRecv = bytesToRecv;
Rhyme 0:d895cd1cd897 94 }
Rhyme 0:d895cd1cd897 95
Rhyme 0:d895cd1cd897 96 uint16_t StatusCommand::getBytesToRecv() {
Rhyme 0:d895cd1cd897 97 return _bytesToRecv;
Rhyme 0:d895cd1cd897 98 }
Rhyme 0:d895cd1cd897 99
Rhyme 0:d895cd1cd897 100 bool StatusCommand::equals(StatusCommand *statusCommand) {
Rhyme 0:d895cd1cd897 101 return (_cmd == statusCommand->_cmd && _bytesToSend == statusCommand->_bytesToSend &&
Rhyme 0:d895cd1cd897 102 _bytesToRecv == statusCommand->_bytesToRecv);
Rhyme 0:d895cd1cd897 103 }
Rhyme 0:d895cd1cd897 104
Rhyme 0:d895cd1cd897 105 bool StatusCommand::isValid() {
Rhyme 0:d895cd1cd897 106 return (_checksum == calcChecksum()) && (_cmd == 0x30 || _cmd == 0x31);
Rhyme 0:d895cd1cd897 107 }
Rhyme 0:d895cd1cd897 108
Rhyme 0:d895cd1cd897 109 void StatusCommand::dumpBytes() {
Rhyme 0:d895cd1cd897 110 #if SERIAL_PRINT_DBG_ASR_ON
Rhyme 0:d895cd1cd897 111 int len = getSize();
Rhyme 0:d895cd1cd897 112 int bytes[len];
Rhyme 0:d895cd1cd897 113 getBytes(bytes);
Rhyme 0:d895cd1cd897 114
Rhyme 0:d895cd1cd897 115 printf("len : %d\n",len);
Rhyme 0:d895cd1cd897 116 printf("data : ");
Rhyme 0:d895cd1cd897 117 for (int i = 0; i < len; i++) {
Rhyme 0:d895cd1cd897 118 if (i > 0) {
Rhyme 0:d895cd1cd897 119 printf(", ");
Rhyme 0:d895cd1cd897 120 }
Rhyme 0:d895cd1cd897 121 int b = bytes[i] & 0xff;
Rhyme 0:d895cd1cd897 122 printf("0x%02x", b) ;
Rhyme 0:d895cd1cd897 123 }
Rhyme 0:d895cd1cd897 124 printf("\n") ;
Rhyme 0:d895cd1cd897 125 #endif
Rhyme 0:d895cd1cd897 126 }
Rhyme 0:d895cd1cd897 127
Rhyme 0:d895cd1cd897 128 void StatusCommand::dump() {
Rhyme 0:d895cd1cd897 129 #if SERIAL_PRINT_DBG_ASR_ON
Rhyme 0:d895cd1cd897 130 printf("cmd : %s\n",_cmd == 0x30 ? "STATUS" : "STATUS_ACK");
Rhyme 0:d895cd1cd897 131 printf("bytes to send : %d\n",_bytesToSend);
Rhyme 0:d895cd1cd897 132 printf("bytes to receive : %d\n",_bytesToRecv);
Rhyme 0:d895cd1cd897 133 #endif
Rhyme 0:d895cd1cd897 134 }
Rhyme 0:d895cd1cd897 135