the do / gr-peach-opencv-project

Opencv 3.1 project on GR-PEACH board

Fork of gr-peach-opencv-project by the do

drivers/SerialBase.cpp@170:54ff26da7eb6, 2017-07-04 (annotated)

Committer:
thedo
Date:
Tue Jul 04 06:23:13 2017 +0000
Revision:
170:54ff26da7eb6
Parent:
167:1657b442184c 
project opencv 3.1 on GR PEACH board, no use SD card.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
thedo 167:1657b442184c 1 /* mbed Microcontroller Library
thedo 167:1657b442184c 2 * Copyright (c) 2006-2013 ARM Limited
thedo 167:1657b442184c 3 *
thedo 167:1657b442184c 4 * Licensed under the Apache License, Version 2.0 (the "License");
thedo 167:1657b442184c 5 * you may not use this file except in compliance with the License.
thedo 167:1657b442184c 6 * You may obtain a copy of the License at
thedo 167:1657b442184c 7 *
thedo 167:1657b442184c 8 * http://www.apache.org/licenses/LICENSE-2.0
thedo 167:1657b442184c 9 *
thedo 167:1657b442184c 10 * Unless required by applicable law or agreed to in writing, software
thedo 167:1657b442184c 11 * distributed under the License is distributed on an "AS IS" BASIS,
thedo 167:1657b442184c 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
thedo 167:1657b442184c 13 * See the License for the specific language governing permissions and
thedo 167:1657b442184c 14 * limitations under the License.
thedo 167:1657b442184c 15 */
thedo 167:1657b442184c 16 #include "drivers/SerialBase.h"
thedo 167:1657b442184c 17 #include "platform/mbed_wait_api.h"
thedo 167:1657b442184c 18 #include "platform/mbed_critical.h"
thedo 167:1657b442184c 19
thedo 167:1657b442184c 20 #if DEVICE_SERIAL
thedo 167:1657b442184c 21
thedo 167:1657b442184c 22 namespace mbed {
thedo 167:1657b442184c 23
thedo 167:1657b442184c 24 static void donothing() {};
thedo 167:1657b442184c 25
thedo 167:1657b442184c 26 SerialBase::SerialBase(PinName tx, PinName rx, int baud) :
thedo 167:1657b442184c 27 #if DEVICE_SERIAL_ASYNCH
thedo 167:1657b442184c 28 _thunk_irq(this), _tx_usage(DMA_USAGE_NEVER),
thedo 167:1657b442184c 29 _rx_usage(DMA_USAGE_NEVER),
thedo 167:1657b442184c 30 #endif
thedo 167:1657b442184c 31 _serial(), _baud(baud) {
thedo 167:1657b442184c 32 // No lock needed in the constructor
thedo 167:1657b442184c 33
thedo 167:1657b442184c 34 for (size_t i = 0; i < sizeof _irq / sizeof _irq[0]; i++) {
thedo 167:1657b442184c 35 _irq[i] = donothing;
thedo 167:1657b442184c 36 }
thedo 167:1657b442184c 37
thedo 167:1657b442184c 38 serial_init(&_serial, tx, rx);
thedo 167:1657b442184c 39 serial_baud(&_serial, _baud);
thedo 167:1657b442184c 40 serial_irq_handler(&_serial, SerialBase::_irq_handler, (uint32_t)this);
thedo 167:1657b442184c 41 }
thedo 167:1657b442184c 42
thedo 167:1657b442184c 43 void SerialBase::baud(int baudrate) {
thedo 167:1657b442184c 44 lock();
thedo 167:1657b442184c 45 serial_baud(&_serial, baudrate);
thedo 167:1657b442184c 46 _baud = baudrate;
thedo 167:1657b442184c 47 unlock();
thedo 167:1657b442184c 48 }
thedo 167:1657b442184c 49
thedo 167:1657b442184c 50 void SerialBase::format(int bits, Parity parity, int stop_bits) {
thedo 167:1657b442184c 51 lock();
thedo 167:1657b442184c 52 serial_format(&_serial, bits, (SerialParity)parity, stop_bits);
thedo 167:1657b442184c 53 unlock();
thedo 167:1657b442184c 54 }
thedo 167:1657b442184c 55
thedo 167:1657b442184c 56 int SerialBase::readable() {
thedo 167:1657b442184c 57 lock();
thedo 167:1657b442184c 58 int ret = serial_readable(&_serial);
thedo 167:1657b442184c 59 unlock();
thedo 167:1657b442184c 60 return ret;
thedo 167:1657b442184c 61 }
thedo 167:1657b442184c 62
thedo 167:1657b442184c 63
thedo 167:1657b442184c 64 int SerialBase::writeable() {
thedo 167:1657b442184c 65 lock();
thedo 167:1657b442184c 66 int ret = serial_writable(&_serial);
thedo 167:1657b442184c 67 unlock();
thedo 167:1657b442184c 68 return ret;
thedo 167:1657b442184c 69 }
thedo 167:1657b442184c 70
thedo 167:1657b442184c 71 void SerialBase::attach(Callback<void()> func, IrqType type) {
thedo 167:1657b442184c 72 lock();
thedo 167:1657b442184c 73 // Disable interrupts when attaching interrupt handler
thedo 167:1657b442184c 74 core_util_critical_section_enter();
thedo 167:1657b442184c 75 if (func) {
thedo 167:1657b442184c 76 _irq[type] = func;
thedo 167:1657b442184c 77 serial_irq_set(&_serial, (SerialIrq)type, 1);
thedo 167:1657b442184c 78 } else {
thedo 167:1657b442184c 79 _irq[type] = donothing;
thedo 167:1657b442184c 80 serial_irq_set(&_serial, (SerialIrq)type, 0);
thedo 167:1657b442184c 81 }
thedo 167:1657b442184c 82 core_util_critical_section_exit();
thedo 167:1657b442184c 83 unlock();
thedo 167:1657b442184c 84 }
thedo 167:1657b442184c 85
thedo 167:1657b442184c 86 void SerialBase::_irq_handler(uint32_t id, SerialIrq irq_type) {
thedo 167:1657b442184c 87 SerialBase *handler = (SerialBase*)id;
thedo 167:1657b442184c 88 handler->_irq[irq_type]();
thedo 167:1657b442184c 89 }
thedo 167:1657b442184c 90
thedo 167:1657b442184c 91 int SerialBase::_base_getc() {
thedo 167:1657b442184c 92 // Mutex is already held
thedo 167:1657b442184c 93 return serial_getc(&_serial);
thedo 167:1657b442184c 94 }
thedo 167:1657b442184c 95
thedo 167:1657b442184c 96 int SerialBase::_base_putc(int c) {
thedo 167:1657b442184c 97 // Mutex is already held
thedo 167:1657b442184c 98 serial_putc(&_serial, c);
thedo 167:1657b442184c 99 return c;
thedo 167:1657b442184c 100 }
thedo 167:1657b442184c 101
thedo 167:1657b442184c 102 void SerialBase::send_break() {
thedo 167:1657b442184c 103 lock();
thedo 167:1657b442184c 104 // Wait for 1.5 frames before clearing the break condition
thedo 167:1657b442184c 105 // This will have different effects on our platforms, but should
thedo 167:1657b442184c 106 // ensure that we keep the break active for at least one frame.
thedo 167:1657b442184c 107 // We consider a full frame (1 start bit + 8 data bits bits +
thedo 167:1657b442184c 108 // 1 parity bit + 2 stop bits = 12 bits) for computation.
thedo 167:1657b442184c 109 // One bit time (in us) = 1000000/_baud
thedo 167:1657b442184c 110 // Twelve bits: 12000000/baud delay
thedo 167:1657b442184c 111 // 1.5 frames: 18000000/baud delay
thedo 167:1657b442184c 112 serial_break_set(&_serial);
thedo 167:1657b442184c 113 wait_us(18000000/_baud);
thedo 167:1657b442184c 114 serial_break_clear(&_serial);
thedo 167:1657b442184c 115 unlock();
thedo 167:1657b442184c 116 }
thedo 167:1657b442184c 117
thedo 167:1657b442184c 118 void SerialBase::lock() {
thedo 167:1657b442184c 119 // Stub
thedo 167:1657b442184c 120 }
thedo 167:1657b442184c 121
thedo 167:1657b442184c 122 void SerialBase:: unlock() {
thedo 167:1657b442184c 123 // Stub
thedo 167:1657b442184c 124 }
thedo 167:1657b442184c 125
thedo 167:1657b442184c 126 #if DEVICE_SERIAL_FC
thedo 167:1657b442184c 127 void SerialBase::set_flow_control(Flow type, PinName flow1, PinName flow2) {
thedo 167:1657b442184c 128 lock();
thedo 167:1657b442184c 129 FlowControl flow_type = (FlowControl)type;
thedo 167:1657b442184c 130 switch(type) {
thedo 167:1657b442184c 131 case RTS:
thedo 167:1657b442184c 132 serial_set_flow_control(&_serial, flow_type, flow1, NC);
thedo 167:1657b442184c 133 break;
thedo 167:1657b442184c 134
thedo 167:1657b442184c 135 case CTS:
thedo 167:1657b442184c 136 serial_set_flow_control(&_serial, flow_type, NC, flow1);
thedo 167:1657b442184c 137 break;
thedo 167:1657b442184c 138
thedo 167:1657b442184c 139 case RTSCTS:
thedo 167:1657b442184c 140 case Disabled:
thedo 167:1657b442184c 141 serial_set_flow_control(&_serial, flow_type, flow1, flow2);
thedo 167:1657b442184c 142 break;
thedo 167:1657b442184c 143
thedo 167:1657b442184c 144 default:
thedo 167:1657b442184c 145 break;
thedo 167:1657b442184c 146 }
thedo 167:1657b442184c 147 unlock();
thedo 167:1657b442184c 148 }
thedo 167:1657b442184c 149 #endif
thedo 167:1657b442184c 150
thedo 167:1657b442184c 151 #if DEVICE_SERIAL_ASYNCH
thedo 167:1657b442184c 152
thedo 167:1657b442184c 153 int SerialBase::write(const uint8_t *buffer, int length, const event_callback_t& callback, int event)
thedo 167:1657b442184c 154 {
thedo 167:1657b442184c 155 if (serial_tx_active(&_serial)) {
thedo 167:1657b442184c 156 return -1; // transaction ongoing
thedo 167:1657b442184c 157 }
thedo 167:1657b442184c 158 start_write((void *)buffer, length, 8, callback, event);
thedo 167:1657b442184c 159 return 0;
thedo 167:1657b442184c 160 }
thedo 167:1657b442184c 161
thedo 167:1657b442184c 162 int SerialBase::write(const uint16_t *buffer, int length, const event_callback_t& callback, int event)
thedo 167:1657b442184c 163 {
thedo 167:1657b442184c 164 if (serial_tx_active(&_serial)) {
thedo 167:1657b442184c 165 return -1; // transaction ongoing
thedo 167:1657b442184c 166 }
thedo 167:1657b442184c 167 start_write((void *)buffer, length, 16, callback, event);
thedo 167:1657b442184c 168 return 0;
thedo 167:1657b442184c 169 }
thedo 167:1657b442184c 170
thedo 167:1657b442184c 171 void SerialBase::start_write(const void *buffer, int buffer_size, char buffer_width, const event_callback_t& callback, int event)
thedo 167:1657b442184c 172 {
thedo 167:1657b442184c 173 _tx_callback = callback;
thedo 167:1657b442184c 174
thedo 167:1657b442184c 175 _thunk_irq.callback(&SerialBase::interrupt_handler_asynch);
thedo 167:1657b442184c 176 serial_tx_asynch(&_serial, buffer, buffer_size, buffer_width, _thunk_irq.entry(), event, _tx_usage);
thedo 167:1657b442184c 177 }
thedo 167:1657b442184c 178
thedo 167:1657b442184c 179 void SerialBase::abort_write(void)
thedo 167:1657b442184c 180 {
thedo 167:1657b442184c 181 serial_tx_abort_asynch(&_serial);
thedo 167:1657b442184c 182 }
thedo 167:1657b442184c 183
thedo 167:1657b442184c 184 void SerialBase::abort_read(void)
thedo 167:1657b442184c 185 {
thedo 167:1657b442184c 186 serial_rx_abort_asynch(&_serial);
thedo 167:1657b442184c 187 }
thedo 167:1657b442184c 188
thedo 167:1657b442184c 189 int SerialBase::set_dma_usage_tx(DMAUsage usage)
thedo 167:1657b442184c 190 {
thedo 167:1657b442184c 191 if (serial_tx_active(&_serial)) {
thedo 167:1657b442184c 192 return -1;
thedo 167:1657b442184c 193 }
thedo 167:1657b442184c 194 _tx_usage = usage;
thedo 167:1657b442184c 195 return 0;
thedo 167:1657b442184c 196 }
thedo 167:1657b442184c 197
thedo 167:1657b442184c 198 int SerialBase::set_dma_usage_rx(DMAUsage usage)
thedo 167:1657b442184c 199 {
thedo 167:1657b442184c 200 if (serial_tx_active(&_serial)) {
thedo 167:1657b442184c 201 return -1;
thedo 167:1657b442184c 202 }
thedo 167:1657b442184c 203 _rx_usage = usage;
thedo 167:1657b442184c 204 return 0;
thedo 167:1657b442184c 205 }
thedo 167:1657b442184c 206
thedo 167:1657b442184c 207 int SerialBase::read(uint8_t *buffer, int length, const event_callback_t& callback, int event, unsigned char char_match)
thedo 167:1657b442184c 208 {
thedo 167:1657b442184c 209 if (serial_rx_active(&_serial)) {
thedo 167:1657b442184c 210 return -1; // transaction ongoing
thedo 167:1657b442184c 211 }
thedo 167:1657b442184c 212 start_read((void*)buffer, length, 8, callback, event, char_match);
thedo 167:1657b442184c 213 return 0;
thedo 167:1657b442184c 214 }
thedo 167:1657b442184c 215
thedo 167:1657b442184c 216
thedo 167:1657b442184c 217 int SerialBase::read(uint16_t *buffer, int length, const event_callback_t& callback, int event, unsigned char char_match)
thedo 167:1657b442184c 218 {
thedo 167:1657b442184c 219 if (serial_rx_active(&_serial)) {
thedo 167:1657b442184c 220 return -1; // transaction ongoing
thedo 167:1657b442184c 221 }
thedo 167:1657b442184c 222 start_read((void*)buffer, length, 16, callback, event, char_match);
thedo 167:1657b442184c 223 return 0;
thedo 167:1657b442184c 224 }
thedo 167:1657b442184c 225
thedo 167:1657b442184c 226
thedo 167:1657b442184c 227 void SerialBase::start_read(void *buffer, int buffer_size, char buffer_width, const event_callback_t& callback, int event, unsigned char char_match)
thedo 167:1657b442184c 228 {
thedo 167:1657b442184c 229 _rx_callback = callback;
thedo 167:1657b442184c 230 _thunk_irq.callback(&SerialBase::interrupt_handler_asynch);
thedo 167:1657b442184c 231 serial_rx_asynch(&_serial, buffer, buffer_size, buffer_width, _thunk_irq.entry(), event, char_match, _rx_usage);
thedo 167:1657b442184c 232 }
thedo 167:1657b442184c 233
thedo 167:1657b442184c 234 void SerialBase::interrupt_handler_asynch(void)
thedo 167:1657b442184c 235 {
thedo 167:1657b442184c 236 int event = serial_irq_handler_asynch(&_serial);
thedo 167:1657b442184c 237 int rx_event = event & SERIAL_EVENT_RX_MASK;
thedo 167:1657b442184c 238 if (_rx_callback && rx_event) {
thedo 167:1657b442184c 239 _rx_callback.call(rx_event);
thedo 167:1657b442184c 240 }
thedo 167:1657b442184c 241
thedo 167:1657b442184c 242 int tx_event = event & SERIAL_EVENT_TX_MASK;
thedo 167:1657b442184c 243 if (_tx_callback && tx_event) {
thedo 167:1657b442184c 244 _tx_callback.call(tx_event);
thedo 167:1657b442184c 245 }
thedo 167:1657b442184c 246 }
thedo 167:1657b442184c 247
thedo 167:1657b442184c 248 #endif
thedo 167:1657b442184c 249
thedo 167:1657b442184c 250 } // namespace mbed
thedo 167:1657b442184c 251
thedo 167:1657b442184c 252 #endif
thedo 167:1657b442184c 253