Daiki Kato / mbed-os-lychee

mbed-os for GR-LYCHEE

Dependents:   mbed-os-example-blinky-gr-lychee GR-Boads_Camera_sample GR-Boards_Audio_Recoder GR-Boads_Camera_DisplayApp ... more

drivers/SerialBase.cpp@0:f782d9c66c49, 2018-02-02 (annotated)

Committer:
dkato
Date:
Fri Feb 02 05:42:23 2018 +0000
Revision:
0:f782d9c66c49
mbed-os for GR-LYCHEE

Who changed what in which revision?

UserRevisionLine numberNew contents of line
dkato 0:f782d9c66c49 1 /* mbed Microcontroller Library
dkato 0:f782d9c66c49 2 * Copyright (c) 2006-2013 ARM Limited
dkato 0:f782d9c66c49 3 *
dkato 0:f782d9c66c49 4 * Licensed under the Apache License, Version 2.0 (the "License");
dkato 0:f782d9c66c49 5 * you may not use this file except in compliance with the License.
dkato 0:f782d9c66c49 6 * You may obtain a copy of the License at
dkato 0:f782d9c66c49 7 *
dkato 0:f782d9c66c49 8 * http://www.apache.org/licenses/LICENSE-2.0
dkato 0:f782d9c66c49 9 *
dkato 0:f782d9c66c49 10 * Unless required by applicable law or agreed to in writing, software
dkato 0:f782d9c66c49 11 * distributed under the License is distributed on an "AS IS" BASIS,
dkato 0:f782d9c66c49 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
dkato 0:f782d9c66c49 13 * See the License for the specific language governing permissions and
dkato 0:f782d9c66c49 14 * limitations under the License.
dkato 0:f782d9c66c49 15 */
dkato 0:f782d9c66c49 16 #include "drivers/SerialBase.h"
dkato 0:f782d9c66c49 17 #include "platform/mbed_wait_api.h"
dkato 0:f782d9c66c49 18 #include "platform/mbed_critical.h"
dkato 0:f782d9c66c49 19
dkato 0:f782d9c66c49 20 #if DEVICE_SERIAL
dkato 0:f782d9c66c49 21
dkato 0:f782d9c66c49 22 namespace mbed {
dkato 0:f782d9c66c49 23
dkato 0:f782d9c66c49 24 static void donothing() {};
dkato 0:f782d9c66c49 25
dkato 0:f782d9c66c49 26 SerialBase::SerialBase(PinName tx, PinName rx, int baud) :
dkato 0:f782d9c66c49 27 #if DEVICE_SERIAL_ASYNCH
dkato 0:f782d9c66c49 28 _thunk_irq(this), _tx_usage(DMA_USAGE_NEVER),
dkato 0:f782d9c66c49 29 _rx_usage(DMA_USAGE_NEVER),
dkato 0:f782d9c66c49 30 #endif
dkato 0:f782d9c66c49 31 _serial(), _baud(baud) {
dkato 0:f782d9c66c49 32 // No lock needed in the constructor
dkato 0:f782d9c66c49 33
dkato 0:f782d9c66c49 34 for (size_t i = 0; i < sizeof _irq / sizeof _irq[0]; i++) {
dkato 0:f782d9c66c49 35 _irq[i] = donothing;
dkato 0:f782d9c66c49 36 }
dkato 0:f782d9c66c49 37
dkato 0:f782d9c66c49 38 serial_init(&_serial, tx, rx);
dkato 0:f782d9c66c49 39 serial_baud(&_serial, _baud);
dkato 0:f782d9c66c49 40 serial_irq_handler(&_serial, SerialBase::_irq_handler, (uint32_t)this);
dkato 0:f782d9c66c49 41 }
dkato 0:f782d9c66c49 42
dkato 0:f782d9c66c49 43 void SerialBase::baud(int baudrate) {
dkato 0:f782d9c66c49 44 lock();
dkato 0:f782d9c66c49 45 serial_baud(&_serial, baudrate);
dkato 0:f782d9c66c49 46 _baud = baudrate;
dkato 0:f782d9c66c49 47 unlock();
dkato 0:f782d9c66c49 48 }
dkato 0:f782d9c66c49 49
dkato 0:f782d9c66c49 50 void SerialBase::format(int bits, Parity parity, int stop_bits) {
dkato 0:f782d9c66c49 51 lock();
dkato 0:f782d9c66c49 52 serial_format(&_serial, bits, (SerialParity)parity, stop_bits);
dkato 0:f782d9c66c49 53 unlock();
dkato 0:f782d9c66c49 54 }
dkato 0:f782d9c66c49 55
dkato 0:f782d9c66c49 56 int SerialBase::readable() {
dkato 0:f782d9c66c49 57 lock();
dkato 0:f782d9c66c49 58 int ret = serial_readable(&_serial);
dkato 0:f782d9c66c49 59 unlock();
dkato 0:f782d9c66c49 60 return ret;
dkato 0:f782d9c66c49 61 }
dkato 0:f782d9c66c49 62
dkato 0:f782d9c66c49 63
dkato 0:f782d9c66c49 64 int SerialBase::writeable() {
dkato 0:f782d9c66c49 65 lock();
dkato 0:f782d9c66c49 66 int ret = serial_writable(&_serial);
dkato 0:f782d9c66c49 67 unlock();
dkato 0:f782d9c66c49 68 return ret;
dkato 0:f782d9c66c49 69 }
dkato 0:f782d9c66c49 70
dkato 0:f782d9c66c49 71 void SerialBase::attach(Callback<void()> func, IrqType type) {
dkato 0:f782d9c66c49 72 lock();
dkato 0:f782d9c66c49 73 // Disable interrupts when attaching interrupt handler
dkato 0:f782d9c66c49 74 core_util_critical_section_enter();
dkato 0:f782d9c66c49 75 if (func) {
dkato 0:f782d9c66c49 76 _irq[type] = func;
dkato 0:f782d9c66c49 77 serial_irq_set(&_serial, (SerialIrq)type, 1);
dkato 0:f782d9c66c49 78 } else {
dkato 0:f782d9c66c49 79 _irq[type] = donothing;
dkato 0:f782d9c66c49 80 serial_irq_set(&_serial, (SerialIrq)type, 0);
dkato 0:f782d9c66c49 81 }
dkato 0:f782d9c66c49 82 core_util_critical_section_exit();
dkato 0:f782d9c66c49 83 unlock();
dkato 0:f782d9c66c49 84 }
dkato 0:f782d9c66c49 85
dkato 0:f782d9c66c49 86 void SerialBase::_irq_handler(uint32_t id, SerialIrq irq_type) {
dkato 0:f782d9c66c49 87 SerialBase *handler = (SerialBase*)id;
dkato 0:f782d9c66c49 88 handler->_irq[irq_type]();
dkato 0:f782d9c66c49 89 }
dkato 0:f782d9c66c49 90
dkato 0:f782d9c66c49 91 int SerialBase::_base_getc() {
dkato 0:f782d9c66c49 92 // Mutex is already held
dkato 0:f782d9c66c49 93 return serial_getc(&_serial);
dkato 0:f782d9c66c49 94 }
dkato 0:f782d9c66c49 95
dkato 0:f782d9c66c49 96 int SerialBase::_base_putc(int c) {
dkato 0:f782d9c66c49 97 // Mutex is already held
dkato 0:f782d9c66c49 98 serial_putc(&_serial, c);
dkato 0:f782d9c66c49 99 return c;
dkato 0:f782d9c66c49 100 }
dkato 0:f782d9c66c49 101
dkato 0:f782d9c66c49 102 void SerialBase::send_break() {
dkato 0:f782d9c66c49 103 lock();
dkato 0:f782d9c66c49 104 // Wait for 1.5 frames before clearing the break condition
dkato 0:f782d9c66c49 105 // This will have different effects on our platforms, but should
dkato 0:f782d9c66c49 106 // ensure that we keep the break active for at least one frame.
dkato 0:f782d9c66c49 107 // We consider a full frame (1 start bit + 8 data bits bits +
dkato 0:f782d9c66c49 108 // 1 parity bit + 2 stop bits = 12 bits) for computation.
dkato 0:f782d9c66c49 109 // One bit time (in us) = 1000000/_baud
dkato 0:f782d9c66c49 110 // Twelve bits: 12000000/baud delay
dkato 0:f782d9c66c49 111 // 1.5 frames: 18000000/baud delay
dkato 0:f782d9c66c49 112 serial_break_set(&_serial);
dkato 0:f782d9c66c49 113 wait_us(18000000/_baud);
dkato 0:f782d9c66c49 114 serial_break_clear(&_serial);
dkato 0:f782d9c66c49 115 unlock();
dkato 0:f782d9c66c49 116 }
dkato 0:f782d9c66c49 117
dkato 0:f782d9c66c49 118 void SerialBase::lock() {
dkato 0:f782d9c66c49 119 // Stub
dkato 0:f782d9c66c49 120 }
dkato 0:f782d9c66c49 121
dkato 0:f782d9c66c49 122 void SerialBase:: unlock() {
dkato 0:f782d9c66c49 123 // Stub
dkato 0:f782d9c66c49 124 }
dkato 0:f782d9c66c49 125
dkato 0:f782d9c66c49 126 #if DEVICE_SERIAL_FC
dkato 0:f782d9c66c49 127 void SerialBase::set_flow_control(Flow type, PinName flow1, PinName flow2) {
dkato 0:f782d9c66c49 128 lock();
dkato 0:f782d9c66c49 129 FlowControl flow_type = (FlowControl)type;
dkato 0:f782d9c66c49 130 switch(type) {
dkato 0:f782d9c66c49 131 case RTS:
dkato 0:f782d9c66c49 132 serial_set_flow_control(&_serial, flow_type, flow1, NC);
dkato 0:f782d9c66c49 133 break;
dkato 0:f782d9c66c49 134
dkato 0:f782d9c66c49 135 case CTS:
dkato 0:f782d9c66c49 136 serial_set_flow_control(&_serial, flow_type, NC, flow1);
dkato 0:f782d9c66c49 137 break;
dkato 0:f782d9c66c49 138
dkato 0:f782d9c66c49 139 case RTSCTS:
dkato 0:f782d9c66c49 140 case Disabled:
dkato 0:f782d9c66c49 141 serial_set_flow_control(&_serial, flow_type, flow1, flow2);
dkato 0:f782d9c66c49 142 break;
dkato 0:f782d9c66c49 143
dkato 0:f782d9c66c49 144 default:
dkato 0:f782d9c66c49 145 break;
dkato 0:f782d9c66c49 146 }
dkato 0:f782d9c66c49 147 unlock();
dkato 0:f782d9c66c49 148 }
dkato 0:f782d9c66c49 149 #endif
dkato 0:f782d9c66c49 150
dkato 0:f782d9c66c49 151 #if DEVICE_SERIAL_ASYNCH
dkato 0:f782d9c66c49 152
dkato 0:f782d9c66c49 153 int SerialBase::write(const uint8_t *buffer, int length, const event_callback_t& callback, int event)
dkato 0:f782d9c66c49 154 {
dkato 0:f782d9c66c49 155 if (serial_tx_active(&_serial)) {
dkato 0:f782d9c66c49 156 return -1; // transaction ongoing
dkato 0:f782d9c66c49 157 }
dkato 0:f782d9c66c49 158 start_write((void *)buffer, length, 8, callback, event);
dkato 0:f782d9c66c49 159 return 0;
dkato 0:f782d9c66c49 160 }
dkato 0:f782d9c66c49 161
dkato 0:f782d9c66c49 162 int SerialBase::write(const uint16_t *buffer, int length, const event_callback_t& callback, int event)
dkato 0:f782d9c66c49 163 {
dkato 0:f782d9c66c49 164 if (serial_tx_active(&_serial)) {
dkato 0:f782d9c66c49 165 return -1; // transaction ongoing
dkato 0:f782d9c66c49 166 }
dkato 0:f782d9c66c49 167 start_write((void *)buffer, length, 16, callback, event);
dkato 0:f782d9c66c49 168 return 0;
dkato 0:f782d9c66c49 169 }
dkato 0:f782d9c66c49 170
dkato 0:f782d9c66c49 171 void SerialBase::start_write(const void *buffer, int buffer_size, char buffer_width, const event_callback_t& callback, int event)
dkato 0:f782d9c66c49 172 {
dkato 0:f782d9c66c49 173 _tx_callback = callback;
dkato 0:f782d9c66c49 174
dkato 0:f782d9c66c49 175 _thunk_irq.callback(&SerialBase::interrupt_handler_asynch);
dkato 0:f782d9c66c49 176 serial_tx_asynch(&_serial, buffer, buffer_size, buffer_width, _thunk_irq.entry(), event, _tx_usage);
dkato 0:f782d9c66c49 177 }
dkato 0:f782d9c66c49 178
dkato 0:f782d9c66c49 179 void SerialBase::abort_write(void)
dkato 0:f782d9c66c49 180 {
dkato 0:f782d9c66c49 181 serial_tx_abort_asynch(&_serial);
dkato 0:f782d9c66c49 182 }
dkato 0:f782d9c66c49 183
dkato 0:f782d9c66c49 184 void SerialBase::abort_read(void)
dkato 0:f782d9c66c49 185 {
dkato 0:f782d9c66c49 186 serial_rx_abort_asynch(&_serial);
dkato 0:f782d9c66c49 187 }
dkato 0:f782d9c66c49 188
dkato 0:f782d9c66c49 189 int SerialBase::set_dma_usage_tx(DMAUsage usage)
dkato 0:f782d9c66c49 190 {
dkato 0:f782d9c66c49 191 if (serial_tx_active(&_serial)) {
dkato 0:f782d9c66c49 192 return -1;
dkato 0:f782d9c66c49 193 }
dkato 0:f782d9c66c49 194 _tx_usage = usage;
dkato 0:f782d9c66c49 195 return 0;
dkato 0:f782d9c66c49 196 }
dkato 0:f782d9c66c49 197
dkato 0:f782d9c66c49 198 int SerialBase::set_dma_usage_rx(DMAUsage usage)
dkato 0:f782d9c66c49 199 {
dkato 0:f782d9c66c49 200 if (serial_tx_active(&_serial)) {
dkato 0:f782d9c66c49 201 return -1;
dkato 0:f782d9c66c49 202 }
dkato 0:f782d9c66c49 203 _rx_usage = usage;
dkato 0:f782d9c66c49 204 return 0;
dkato 0:f782d9c66c49 205 }
dkato 0:f782d9c66c49 206
dkato 0:f782d9c66c49 207 int SerialBase::read(uint8_t *buffer, int length, const event_callback_t& callback, int event, unsigned char char_match)
dkato 0:f782d9c66c49 208 {
dkato 0:f782d9c66c49 209 if (serial_rx_active(&_serial)) {
dkato 0:f782d9c66c49 210 return -1; // transaction ongoing
dkato 0:f782d9c66c49 211 }
dkato 0:f782d9c66c49 212 start_read((void*)buffer, length, 8, callback, event, char_match);
dkato 0:f782d9c66c49 213 return 0;
dkato 0:f782d9c66c49 214 }
dkato 0:f782d9c66c49 215
dkato 0:f782d9c66c49 216
dkato 0:f782d9c66c49 217 int SerialBase::read(uint16_t *buffer, int length, const event_callback_t& callback, int event, unsigned char char_match)
dkato 0:f782d9c66c49 218 {
dkato 0:f782d9c66c49 219 if (serial_rx_active(&_serial)) {
dkato 0:f782d9c66c49 220 return -1; // transaction ongoing
dkato 0:f782d9c66c49 221 }
dkato 0:f782d9c66c49 222 start_read((void*)buffer, length, 16, callback, event, char_match);
dkato 0:f782d9c66c49 223 return 0;
dkato 0:f782d9c66c49 224 }
dkato 0:f782d9c66c49 225
dkato 0:f782d9c66c49 226
dkato 0:f782d9c66c49 227 void SerialBase::start_read(void *buffer, int buffer_size, char buffer_width, const event_callback_t& callback, int event, unsigned char char_match)
dkato 0:f782d9c66c49 228 {
dkato 0:f782d9c66c49 229 _rx_callback = callback;
dkato 0:f782d9c66c49 230 _thunk_irq.callback(&SerialBase::interrupt_handler_asynch);
dkato 0:f782d9c66c49 231 serial_rx_asynch(&_serial, buffer, buffer_size, buffer_width, _thunk_irq.entry(), event, char_match, _rx_usage);
dkato 0:f782d9c66c49 232 }
dkato 0:f782d9c66c49 233
dkato 0:f782d9c66c49 234 void SerialBase::interrupt_handler_asynch(void)
dkato 0:f782d9c66c49 235 {
dkato 0:f782d9c66c49 236 int event = serial_irq_handler_asynch(&_serial);
dkato 0:f782d9c66c49 237 int rx_event = event & SERIAL_EVENT_RX_MASK;
dkato 0:f782d9c66c49 238 if (_rx_callback && rx_event) {
dkato 0:f782d9c66c49 239 _rx_callback.call(rx_event);
dkato 0:f782d9c66c49 240 }
dkato 0:f782d9c66c49 241
dkato 0:f782d9c66c49 242 int tx_event = event & SERIAL_EVENT_TX_MASK;
dkato 0:f782d9c66c49 243 if (_tx_callback && tx_event) {
dkato 0:f782d9c66c49 244 _tx_callback.call(tx_event);
dkato 0:f782d9c66c49 245 }
dkato 0:f782d9c66c49 246 }
dkato 0:f782d9c66c49 247
dkato 0:f782d9c66c49 248 #endif
dkato 0:f782d9c66c49 249
dkato 0:f782d9c66c49 250 } // namespace mbed
dkato 0:f782d9c66c49 251
dkato 0:f782d9c66c49 252 #endif