ON Semiconductor / mbed-os

5.2.1 - Updated I2C files

Dependents:   mbed-TFT-example-NCS36510 mbed-Accelerometer-example-NCS36510 mbed-Accelerometer-example-NCS36510

drivers/SerialBase.cpp@0:098463de4c5d, 2017-01-25 (annotated)

Committer:
group-onsemi
Date:
Wed Jan 25 20:34:15 2017 +0000
Revision:
0:098463de4c5d
Initial commit

Who changed what in which revision?

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group-onsemi 0:098463de4c5d 1 /* mbed Microcontroller Library
group-onsemi 0:098463de4c5d 2 * Copyright (c) 2006-2013 ARM Limited
group-onsemi 0:098463de4c5d 3 *
group-onsemi 0:098463de4c5d 4 * Licensed under the Apache License, Version 2.0 (the "License");
group-onsemi 0:098463de4c5d 5 * you may not use this file except in compliance with the License.
group-onsemi 0:098463de4c5d 6 * You may obtain a copy of the License at
group-onsemi 0:098463de4c5d 7 *
group-onsemi 0:098463de4c5d 8 * http://www.apache.org/licenses/LICENSE-2.0
group-onsemi 0:098463de4c5d 9 *
group-onsemi 0:098463de4c5d 10 * Unless required by applicable law or agreed to in writing, software
group-onsemi 0:098463de4c5d 11 * distributed under the License is distributed on an "AS IS" BASIS,
group-onsemi 0:098463de4c5d 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
group-onsemi 0:098463de4c5d 13 * See the License for the specific language governing permissions and
group-onsemi 0:098463de4c5d 14 * limitations under the License.
group-onsemi 0:098463de4c5d 15 */
group-onsemi 0:098463de4c5d 16 #include "drivers/SerialBase.h"
group-onsemi 0:098463de4c5d 17 #include "platform/wait_api.h"
group-onsemi 0:098463de4c5d 18 #include "platform/critical.h"
group-onsemi 0:098463de4c5d 19
group-onsemi 0:098463de4c5d 20 #if DEVICE_SERIAL
group-onsemi 0:098463de4c5d 21
group-onsemi 0:098463de4c5d 22 namespace mbed {
group-onsemi 0:098463de4c5d 23
group-onsemi 0:098463de4c5d 24 static void donothing() {};
group-onsemi 0:098463de4c5d 25
group-onsemi 0:098463de4c5d 26 SerialBase::SerialBase(PinName tx, PinName rx, int baud) :
group-onsemi 0:098463de4c5d 27 #if DEVICE_SERIAL_ASYNCH
group-onsemi 0:098463de4c5d 28 _thunk_irq(this), _tx_usage(DMA_USAGE_NEVER),
group-onsemi 0:098463de4c5d 29 _rx_usage(DMA_USAGE_NEVER),
group-onsemi 0:098463de4c5d 30 #endif
group-onsemi 0:098463de4c5d 31 _serial(), _baud(baud) {
group-onsemi 0:098463de4c5d 32 // No lock needed in the constructor
group-onsemi 0:098463de4c5d 33
group-onsemi 0:098463de4c5d 34 for (size_t i = 0; i < sizeof _irq / sizeof _irq[0]; i++) {
group-onsemi 0:098463de4c5d 35 _irq[i].attach(donothing);
group-onsemi 0:098463de4c5d 36 }
group-onsemi 0:098463de4c5d 37
group-onsemi 0:098463de4c5d 38 serial_init(&_serial, tx, rx);
group-onsemi 0:098463de4c5d 39 serial_baud(&_serial, _baud);
group-onsemi 0:098463de4c5d 40 serial_irq_handler(&_serial, SerialBase::_irq_handler, (uint32_t)this);
group-onsemi 0:098463de4c5d 41 }
group-onsemi 0:098463de4c5d 42
group-onsemi 0:098463de4c5d 43 void SerialBase::baud(int baudrate) {
group-onsemi 0:098463de4c5d 44 lock();
group-onsemi 0:098463de4c5d 45 serial_baud(&_serial, baudrate);
group-onsemi 0:098463de4c5d 46 _baud = baudrate;
group-onsemi 0:098463de4c5d 47 unlock();
group-onsemi 0:098463de4c5d 48 }
group-onsemi 0:098463de4c5d 49
group-onsemi 0:098463de4c5d 50 void SerialBase::format(int bits, Parity parity, int stop_bits) {
group-onsemi 0:098463de4c5d 51 lock();
group-onsemi 0:098463de4c5d 52 serial_format(&_serial, bits, (SerialParity)parity, stop_bits);
group-onsemi 0:098463de4c5d 53 unlock();
group-onsemi 0:098463de4c5d 54 }
group-onsemi 0:098463de4c5d 55
group-onsemi 0:098463de4c5d 56 int SerialBase::readable() {
group-onsemi 0:098463de4c5d 57 lock();
group-onsemi 0:098463de4c5d 58 int ret = serial_readable(&_serial);
group-onsemi 0:098463de4c5d 59 unlock();
group-onsemi 0:098463de4c5d 60 return ret;
group-onsemi 0:098463de4c5d 61 }
group-onsemi 0:098463de4c5d 62
group-onsemi 0:098463de4c5d 63
group-onsemi 0:098463de4c5d 64 int SerialBase::writeable() {
group-onsemi 0:098463de4c5d 65 lock();
group-onsemi 0:098463de4c5d 66 int ret = serial_writable(&_serial);
group-onsemi 0:098463de4c5d 67 unlock();
group-onsemi 0:098463de4c5d 68 return ret;
group-onsemi 0:098463de4c5d 69 }
group-onsemi 0:098463de4c5d 70
group-onsemi 0:098463de4c5d 71 void SerialBase::attach(Callback<void()> func, IrqType type) {
group-onsemi 0:098463de4c5d 72 lock();
group-onsemi 0:098463de4c5d 73 // Disable interrupts when attaching interrupt handler
group-onsemi 0:098463de4c5d 74 core_util_critical_section_enter();
group-onsemi 0:098463de4c5d 75 if (func) {
group-onsemi 0:098463de4c5d 76 _irq[type].attach(func);
group-onsemi 0:098463de4c5d 77 serial_irq_set(&_serial, (SerialIrq)type, 1);
group-onsemi 0:098463de4c5d 78 } else {
group-onsemi 0:098463de4c5d 79 _irq[type].attach(donothing);
group-onsemi 0:098463de4c5d 80 serial_irq_set(&_serial, (SerialIrq)type, 0);
group-onsemi 0:098463de4c5d 81 }
group-onsemi 0:098463de4c5d 82 core_util_critical_section_exit();
group-onsemi 0:098463de4c5d 83 unlock();
group-onsemi 0:098463de4c5d 84 }
group-onsemi 0:098463de4c5d 85
group-onsemi 0:098463de4c5d 86 void SerialBase::_irq_handler(uint32_t id, SerialIrq irq_type) {
group-onsemi 0:098463de4c5d 87 SerialBase *handler = (SerialBase*)id;
group-onsemi 0:098463de4c5d 88 handler->_irq[irq_type].call();
group-onsemi 0:098463de4c5d 89 }
group-onsemi 0:098463de4c5d 90
group-onsemi 0:098463de4c5d 91 int SerialBase::_base_getc() {
group-onsemi 0:098463de4c5d 92 // Mutex is already held
group-onsemi 0:098463de4c5d 93 return serial_getc(&_serial);
group-onsemi 0:098463de4c5d 94 }
group-onsemi 0:098463de4c5d 95
group-onsemi 0:098463de4c5d 96 int SerialBase::_base_putc(int c) {
group-onsemi 0:098463de4c5d 97 // Mutex is already held
group-onsemi 0:098463de4c5d 98 serial_putc(&_serial, c);
group-onsemi 0:098463de4c5d 99 return c;
group-onsemi 0:098463de4c5d 100 }
group-onsemi 0:098463de4c5d 101
group-onsemi 0:098463de4c5d 102 void SerialBase::send_break() {
group-onsemi 0:098463de4c5d 103 lock();
group-onsemi 0:098463de4c5d 104 // Wait for 1.5 frames before clearing the break condition
group-onsemi 0:098463de4c5d 105 // This will have different effects on our platforms, but should
group-onsemi 0:098463de4c5d 106 // ensure that we keep the break active for at least one frame.
group-onsemi 0:098463de4c5d 107 // We consider a full frame (1 start bit + 8 data bits bits +
group-onsemi 0:098463de4c5d 108 // 1 parity bit + 2 stop bits = 12 bits) for computation.
group-onsemi 0:098463de4c5d 109 // One bit time (in us) = 1000000/_baud
group-onsemi 0:098463de4c5d 110 // Twelve bits: 12000000/baud delay
group-onsemi 0:098463de4c5d 111 // 1.5 frames: 18000000/baud delay
group-onsemi 0:098463de4c5d 112 serial_break_set(&_serial);
group-onsemi 0:098463de4c5d 113 wait_us(18000000/_baud);
group-onsemi 0:098463de4c5d 114 serial_break_clear(&_serial);
group-onsemi 0:098463de4c5d 115 unlock();
group-onsemi 0:098463de4c5d 116 }
group-onsemi 0:098463de4c5d 117
group-onsemi 0:098463de4c5d 118 void SerialBase::lock() {
group-onsemi 0:098463de4c5d 119 // Stub
group-onsemi 0:098463de4c5d 120 }
group-onsemi 0:098463de4c5d 121
group-onsemi 0:098463de4c5d 122 void SerialBase:: unlock() {
group-onsemi 0:098463de4c5d 123 // Stub
group-onsemi 0:098463de4c5d 124 }
group-onsemi 0:098463de4c5d 125
group-onsemi 0:098463de4c5d 126 #if DEVICE_SERIAL_FC
group-onsemi 0:098463de4c5d 127 void SerialBase::set_flow_control(Flow type, PinName flow1, PinName flow2) {
group-onsemi 0:098463de4c5d 128 lock();
group-onsemi 0:098463de4c5d 129 FlowControl flow_type = (FlowControl)type;
group-onsemi 0:098463de4c5d 130 switch(type) {
group-onsemi 0:098463de4c5d 131 case RTS:
group-onsemi 0:098463de4c5d 132 serial_set_flow_control(&_serial, flow_type, flow1, NC);
group-onsemi 0:098463de4c5d 133 break;
group-onsemi 0:098463de4c5d 134
group-onsemi 0:098463de4c5d 135 case CTS:
group-onsemi 0:098463de4c5d 136 serial_set_flow_control(&_serial, flow_type, NC, flow1);
group-onsemi 0:098463de4c5d 137 break;
group-onsemi 0:098463de4c5d 138
group-onsemi 0:098463de4c5d 139 case RTSCTS:
group-onsemi 0:098463de4c5d 140 case Disabled:
group-onsemi 0:098463de4c5d 141 serial_set_flow_control(&_serial, flow_type, flow1, flow2);
group-onsemi 0:098463de4c5d 142 break;
group-onsemi 0:098463de4c5d 143
group-onsemi 0:098463de4c5d 144 default:
group-onsemi 0:098463de4c5d 145 break;
group-onsemi 0:098463de4c5d 146 }
group-onsemi 0:098463de4c5d 147 unlock();
group-onsemi 0:098463de4c5d 148 }
group-onsemi 0:098463de4c5d 149 #endif
group-onsemi 0:098463de4c5d 150
group-onsemi 0:098463de4c5d 151 #if DEVICE_SERIAL_ASYNCH
group-onsemi 0:098463de4c5d 152
group-onsemi 0:098463de4c5d 153 int SerialBase::write(const uint8_t *buffer, int length, const event_callback_t& callback, int event)
group-onsemi 0:098463de4c5d 154 {
group-onsemi 0:098463de4c5d 155 if (serial_tx_active(&_serial)) {
group-onsemi 0:098463de4c5d 156 return -1; // transaction ongoing
group-onsemi 0:098463de4c5d 157 }
group-onsemi 0:098463de4c5d 158 start_write((void *)buffer, length, 8, callback, event);
group-onsemi 0:098463de4c5d 159 return 0;
group-onsemi 0:098463de4c5d 160 }
group-onsemi 0:098463de4c5d 161
group-onsemi 0:098463de4c5d 162 int SerialBase::write(const uint16_t *buffer, int length, const event_callback_t& callback, int event)
group-onsemi 0:098463de4c5d 163 {
group-onsemi 0:098463de4c5d 164 if (serial_tx_active(&_serial)) {
group-onsemi 0:098463de4c5d 165 return -1; // transaction ongoing
group-onsemi 0:098463de4c5d 166 }
group-onsemi 0:098463de4c5d 167 start_write((void *)buffer, length, 16, callback, event);
group-onsemi 0:098463de4c5d 168 return 0;
group-onsemi 0:098463de4c5d 169 }
group-onsemi 0:098463de4c5d 170
group-onsemi 0:098463de4c5d 171 void SerialBase::start_write(const void *buffer, int buffer_size, char buffer_width, const event_callback_t& callback, int event)
group-onsemi 0:098463de4c5d 172 {
group-onsemi 0:098463de4c5d 173 _tx_callback = callback;
group-onsemi 0:098463de4c5d 174
group-onsemi 0:098463de4c5d 175 _thunk_irq.callback(&SerialBase::interrupt_handler_asynch);
group-onsemi 0:098463de4c5d 176 serial_tx_asynch(&_serial, buffer, buffer_size, buffer_width, _thunk_irq.entry(), event, _tx_usage);
group-onsemi 0:098463de4c5d 177 }
group-onsemi 0:098463de4c5d 178
group-onsemi 0:098463de4c5d 179 void SerialBase::abort_write(void)
group-onsemi 0:098463de4c5d 180 {
group-onsemi 0:098463de4c5d 181 serial_tx_abort_asynch(&_serial);
group-onsemi 0:098463de4c5d 182 }
group-onsemi 0:098463de4c5d 183
group-onsemi 0:098463de4c5d 184 void SerialBase::abort_read(void)
group-onsemi 0:098463de4c5d 185 {
group-onsemi 0:098463de4c5d 186 serial_rx_abort_asynch(&_serial);
group-onsemi 0:098463de4c5d 187 }
group-onsemi 0:098463de4c5d 188
group-onsemi 0:098463de4c5d 189 int SerialBase::set_dma_usage_tx(DMAUsage usage)
group-onsemi 0:098463de4c5d 190 {
group-onsemi 0:098463de4c5d 191 if (serial_tx_active(&_serial)) {
group-onsemi 0:098463de4c5d 192 return -1;
group-onsemi 0:098463de4c5d 193 }
group-onsemi 0:098463de4c5d 194 _tx_usage = usage;
group-onsemi 0:098463de4c5d 195 return 0;
group-onsemi 0:098463de4c5d 196 }
group-onsemi 0:098463de4c5d 197
group-onsemi 0:098463de4c5d 198 int SerialBase::set_dma_usage_rx(DMAUsage usage)
group-onsemi 0:098463de4c5d 199 {
group-onsemi 0:098463de4c5d 200 if (serial_tx_active(&_serial)) {
group-onsemi 0:098463de4c5d 201 return -1;
group-onsemi 0:098463de4c5d 202 }
group-onsemi 0:098463de4c5d 203 _rx_usage = usage;
group-onsemi 0:098463de4c5d 204 return 0;
group-onsemi 0:098463de4c5d 205 }
group-onsemi 0:098463de4c5d 206
group-onsemi 0:098463de4c5d 207 int SerialBase::read(uint8_t *buffer, int length, const event_callback_t& callback, int event, unsigned char char_match)
group-onsemi 0:098463de4c5d 208 {
group-onsemi 0:098463de4c5d 209 if (serial_rx_active(&_serial)) {
group-onsemi 0:098463de4c5d 210 return -1; // transaction ongoing
group-onsemi 0:098463de4c5d 211 }
group-onsemi 0:098463de4c5d 212 start_read((void*)buffer, length, 8, callback, event, char_match);
group-onsemi 0:098463de4c5d 213 return 0;
group-onsemi 0:098463de4c5d 214 }
group-onsemi 0:098463de4c5d 215
group-onsemi 0:098463de4c5d 216
group-onsemi 0:098463de4c5d 217 int SerialBase::read(uint16_t *buffer, int length, const event_callback_t& callback, int event, unsigned char char_match)
group-onsemi 0:098463de4c5d 218 {
group-onsemi 0:098463de4c5d 219 if (serial_rx_active(&_serial)) {
group-onsemi 0:098463de4c5d 220 return -1; // transaction ongoing
group-onsemi 0:098463de4c5d 221 }
group-onsemi 0:098463de4c5d 222 start_read((void*)buffer, length, 16, callback, event, char_match);
group-onsemi 0:098463de4c5d 223 return 0;
group-onsemi 0:098463de4c5d 224 }
group-onsemi 0:098463de4c5d 225
group-onsemi 0:098463de4c5d 226
group-onsemi 0:098463de4c5d 227 void SerialBase::start_read(void *buffer, int buffer_size, char buffer_width, const event_callback_t& callback, int event, unsigned char char_match)
group-onsemi 0:098463de4c5d 228 {
group-onsemi 0:098463de4c5d 229 _rx_callback = callback;
group-onsemi 0:098463de4c5d 230 _thunk_irq.callback(&SerialBase::interrupt_handler_asynch);
group-onsemi 0:098463de4c5d 231 serial_rx_asynch(&_serial, buffer, buffer_size, buffer_width, _thunk_irq.entry(), event, char_match, _rx_usage);
group-onsemi 0:098463de4c5d 232 }
group-onsemi 0:098463de4c5d 233
group-onsemi 0:098463de4c5d 234 void SerialBase::interrupt_handler_asynch(void)
group-onsemi 0:098463de4c5d 235 {
group-onsemi 0:098463de4c5d 236 int event = serial_irq_handler_asynch(&_serial);
group-onsemi 0:098463de4c5d 237 int rx_event = event & SERIAL_EVENT_RX_MASK;
group-onsemi 0:098463de4c5d 238 if (_rx_callback && rx_event) {
group-onsemi 0:098463de4c5d 239 _rx_callback.call(rx_event);
group-onsemi 0:098463de4c5d 240 }
group-onsemi 0:098463de4c5d 241
group-onsemi 0:098463de4c5d 242 int tx_event = event & SERIAL_EVENT_TX_MASK;
group-onsemi 0:098463de4c5d 243 if (_tx_callback && tx_event) {
group-onsemi 0:098463de4c5d 244 _tx_callback.call(tx_event);
group-onsemi 0:098463de4c5d 245 }
group-onsemi 0:098463de4c5d 246 }
group-onsemi 0:098463de4c5d 247
group-onsemi 0:098463de4c5d 248 #endif
group-onsemi 0:098463de4c5d 249
group-onsemi 0:098463de4c5d 250 } // namespace mbed
group-onsemi 0:098463de4c5d 251
group-onsemi 0:098463de4c5d 252 #endif