Greg Steiert / pegasus_dev

Development mbed library for MAX32630FTHR

Dependents:   blinky_max32630fthr

drivers/SerialBase.cpp@0:5c4d7b2438d3, 2016-11-11 (annotated)

Committer:
switches
Date:
Fri Nov 11 20:59:50 2016 +0000
Revision:
0:5c4d7b2438d3
Initial commit

Who changed what in which revision?

UserRevisionLine numberNew contents of line
switches 0:5c4d7b2438d3 1 /* mbed Microcontroller Library
switches 0:5c4d7b2438d3 2 * Copyright (c) 2006-2013 ARM Limited
switches 0:5c4d7b2438d3 3 *
switches 0:5c4d7b2438d3 4 * Licensed under the Apache License, Version 2.0 (the "License");
switches 0:5c4d7b2438d3 5 * you may not use this file except in compliance with the License.
switches 0:5c4d7b2438d3 6 * You may obtain a copy of the License at
switches 0:5c4d7b2438d3 7 *
switches 0:5c4d7b2438d3 8 * http://www.apache.org/licenses/LICENSE-2.0
switches 0:5c4d7b2438d3 9 *
switches 0:5c4d7b2438d3 10 * Unless required by applicable law or agreed to in writing, software
switches 0:5c4d7b2438d3 11 * distributed under the License is distributed on an "AS IS" BASIS,
switches 0:5c4d7b2438d3 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
switches 0:5c4d7b2438d3 13 * See the License for the specific language governing permissions and
switches 0:5c4d7b2438d3 14 * limitations under the License.
switches 0:5c4d7b2438d3 15 */
switches 0:5c4d7b2438d3 16 #include "drivers/SerialBase.h"
switches 0:5c4d7b2438d3 17 #include "platform/wait_api.h"
switches 0:5c4d7b2438d3 18 #include "platform/critical.h"
switches 0:5c4d7b2438d3 19
switches 0:5c4d7b2438d3 20 #if DEVICE_SERIAL
switches 0:5c4d7b2438d3 21
switches 0:5c4d7b2438d3 22 namespace mbed {
switches 0:5c4d7b2438d3 23
switches 0:5c4d7b2438d3 24 static void donothing() {};
switches 0:5c4d7b2438d3 25
switches 0:5c4d7b2438d3 26 SerialBase::SerialBase(PinName tx, PinName rx, int baud) :
switches 0:5c4d7b2438d3 27 #if DEVICE_SERIAL_ASYNCH
switches 0:5c4d7b2438d3 28 _thunk_irq(this), _tx_usage(DMA_USAGE_NEVER),
switches 0:5c4d7b2438d3 29 _rx_usage(DMA_USAGE_NEVER),
switches 0:5c4d7b2438d3 30 #endif
switches 0:5c4d7b2438d3 31 _serial(), _baud(baud) {
switches 0:5c4d7b2438d3 32 // No lock needed in the constructor
switches 0:5c4d7b2438d3 33
switches 0:5c4d7b2438d3 34 for (size_t i = 0; i < sizeof _irq / sizeof _irq[0]; i++) {
switches 0:5c4d7b2438d3 35 _irq[i].attach(donothing);
switches 0:5c4d7b2438d3 36 }
switches 0:5c4d7b2438d3 37
switches 0:5c4d7b2438d3 38 serial_init(&_serial, tx, rx);
switches 0:5c4d7b2438d3 39 serial_baud(&_serial, _baud);
switches 0:5c4d7b2438d3 40 serial_irq_handler(&_serial, SerialBase::_irq_handler, (uint32_t)this);
switches 0:5c4d7b2438d3 41 }
switches 0:5c4d7b2438d3 42
switches 0:5c4d7b2438d3 43 void SerialBase::baud(int baudrate) {
switches 0:5c4d7b2438d3 44 lock();
switches 0:5c4d7b2438d3 45 serial_baud(&_serial, baudrate);
switches 0:5c4d7b2438d3 46 _baud = baudrate;
switches 0:5c4d7b2438d3 47 unlock();
switches 0:5c4d7b2438d3 48 }
switches 0:5c4d7b2438d3 49
switches 0:5c4d7b2438d3 50 void SerialBase::format(int bits, Parity parity, int stop_bits) {
switches 0:5c4d7b2438d3 51 lock();
switches 0:5c4d7b2438d3 52 serial_format(&_serial, bits, (SerialParity)parity, stop_bits);
switches 0:5c4d7b2438d3 53 unlock();
switches 0:5c4d7b2438d3 54 }
switches 0:5c4d7b2438d3 55
switches 0:5c4d7b2438d3 56 int SerialBase::readable() {
switches 0:5c4d7b2438d3 57 lock();
switches 0:5c4d7b2438d3 58 int ret = serial_readable(&_serial);
switches 0:5c4d7b2438d3 59 unlock();
switches 0:5c4d7b2438d3 60 return ret;
switches 0:5c4d7b2438d3 61 }
switches 0:5c4d7b2438d3 62
switches 0:5c4d7b2438d3 63
switches 0:5c4d7b2438d3 64 int SerialBase::writeable() {
switches 0:5c4d7b2438d3 65 lock();
switches 0:5c4d7b2438d3 66 int ret = serial_writable(&_serial);
switches 0:5c4d7b2438d3 67 unlock();
switches 0:5c4d7b2438d3 68 return ret;
switches 0:5c4d7b2438d3 69 }
switches 0:5c4d7b2438d3 70
switches 0:5c4d7b2438d3 71 void SerialBase::attach(Callback<void()> func, IrqType type) {
switches 0:5c4d7b2438d3 72 lock();
switches 0:5c4d7b2438d3 73 // Disable interrupts when attaching interrupt handler
switches 0:5c4d7b2438d3 74 core_util_critical_section_enter();
switches 0:5c4d7b2438d3 75 if (func) {
switches 0:5c4d7b2438d3 76 _irq[type].attach(func);
switches 0:5c4d7b2438d3 77 serial_irq_set(&_serial, (SerialIrq)type, 1);
switches 0:5c4d7b2438d3 78 } else {
switches 0:5c4d7b2438d3 79 _irq[type].attach(donothing);
switches 0:5c4d7b2438d3 80 serial_irq_set(&_serial, (SerialIrq)type, 0);
switches 0:5c4d7b2438d3 81 }
switches 0:5c4d7b2438d3 82 core_util_critical_section_exit();
switches 0:5c4d7b2438d3 83 unlock();
switches 0:5c4d7b2438d3 84 }
switches 0:5c4d7b2438d3 85
switches 0:5c4d7b2438d3 86 void SerialBase::_irq_handler(uint32_t id, SerialIrq irq_type) {
switches 0:5c4d7b2438d3 87 SerialBase *handler = (SerialBase*)id;
switches 0:5c4d7b2438d3 88 handler->_irq[irq_type].call();
switches 0:5c4d7b2438d3 89 }
switches 0:5c4d7b2438d3 90
switches 0:5c4d7b2438d3 91 int SerialBase::_base_getc() {
switches 0:5c4d7b2438d3 92 // Mutex is already held
switches 0:5c4d7b2438d3 93 return serial_getc(&_serial);
switches 0:5c4d7b2438d3 94 }
switches 0:5c4d7b2438d3 95
switches 0:5c4d7b2438d3 96 int SerialBase::_base_putc(int c) {
switches 0:5c4d7b2438d3 97 // Mutex is already held
switches 0:5c4d7b2438d3 98 serial_putc(&_serial, c);
switches 0:5c4d7b2438d3 99 return c;
switches 0:5c4d7b2438d3 100 }
switches 0:5c4d7b2438d3 101
switches 0:5c4d7b2438d3 102 void SerialBase::send_break() {
switches 0:5c4d7b2438d3 103 lock();
switches 0:5c4d7b2438d3 104 // Wait for 1.5 frames before clearing the break condition
switches 0:5c4d7b2438d3 105 // This will have different effects on our platforms, but should
switches 0:5c4d7b2438d3 106 // ensure that we keep the break active for at least one frame.
switches 0:5c4d7b2438d3 107 // We consider a full frame (1 start bit + 8 data bits bits +
switches 0:5c4d7b2438d3 108 // 1 parity bit + 2 stop bits = 12 bits) for computation.
switches 0:5c4d7b2438d3 109 // One bit time (in us) = 1000000/_baud
switches 0:5c4d7b2438d3 110 // Twelve bits: 12000000/baud delay
switches 0:5c4d7b2438d3 111 // 1.5 frames: 18000000/baud delay
switches 0:5c4d7b2438d3 112 serial_break_set(&_serial);
switches 0:5c4d7b2438d3 113 wait_us(18000000/_baud);
switches 0:5c4d7b2438d3 114 serial_break_clear(&_serial);
switches 0:5c4d7b2438d3 115 unlock();
switches 0:5c4d7b2438d3 116 }
switches 0:5c4d7b2438d3 117
switches 0:5c4d7b2438d3 118 void SerialBase::lock() {
switches 0:5c4d7b2438d3 119 // Stub
switches 0:5c4d7b2438d3 120 }
switches 0:5c4d7b2438d3 121
switches 0:5c4d7b2438d3 122 void SerialBase:: unlock() {
switches 0:5c4d7b2438d3 123 // Stub
switches 0:5c4d7b2438d3 124 }
switches 0:5c4d7b2438d3 125
switches 0:5c4d7b2438d3 126 #if DEVICE_SERIAL_FC
switches 0:5c4d7b2438d3 127 void SerialBase::set_flow_control(Flow type, PinName flow1, PinName flow2) {
switches 0:5c4d7b2438d3 128 lock();
switches 0:5c4d7b2438d3 129 FlowControl flow_type = (FlowControl)type;
switches 0:5c4d7b2438d3 130 switch(type) {
switches 0:5c4d7b2438d3 131 case RTS:
switches 0:5c4d7b2438d3 132 serial_set_flow_control(&_serial, flow_type, flow1, NC);
switches 0:5c4d7b2438d3 133 break;
switches 0:5c4d7b2438d3 134
switches 0:5c4d7b2438d3 135 case CTS:
switches 0:5c4d7b2438d3 136 serial_set_flow_control(&_serial, flow_type, NC, flow1);
switches 0:5c4d7b2438d3 137 break;
switches 0:5c4d7b2438d3 138
switches 0:5c4d7b2438d3 139 case RTSCTS:
switches 0:5c4d7b2438d3 140 case Disabled:
switches 0:5c4d7b2438d3 141 serial_set_flow_control(&_serial, flow_type, flow1, flow2);
switches 0:5c4d7b2438d3 142 break;
switches 0:5c4d7b2438d3 143
switches 0:5c4d7b2438d3 144 default:
switches 0:5c4d7b2438d3 145 break;
switches 0:5c4d7b2438d3 146 }
switches 0:5c4d7b2438d3 147 unlock();
switches 0:5c4d7b2438d3 148 }
switches 0:5c4d7b2438d3 149 #endif
switches 0:5c4d7b2438d3 150
switches 0:5c4d7b2438d3 151 #if DEVICE_SERIAL_ASYNCH
switches 0:5c4d7b2438d3 152
switches 0:5c4d7b2438d3 153 int SerialBase::write(const uint8_t *buffer, int length, const event_callback_t& callback, int event)
switches 0:5c4d7b2438d3 154 {
switches 0:5c4d7b2438d3 155 if (serial_tx_active(&_serial)) {
switches 0:5c4d7b2438d3 156 return -1; // transaction ongoing
switches 0:5c4d7b2438d3 157 }
switches 0:5c4d7b2438d3 158 start_write((void *)buffer, length, 8, callback, event);
switches 0:5c4d7b2438d3 159 return 0;
switches 0:5c4d7b2438d3 160 }
switches 0:5c4d7b2438d3 161
switches 0:5c4d7b2438d3 162 int SerialBase::write(const uint16_t *buffer, int length, const event_callback_t& callback, int event)
switches 0:5c4d7b2438d3 163 {
switches 0:5c4d7b2438d3 164 if (serial_tx_active(&_serial)) {
switches 0:5c4d7b2438d3 165 return -1; // transaction ongoing
switches 0:5c4d7b2438d3 166 }
switches 0:5c4d7b2438d3 167 start_write((void *)buffer, length, 16, callback, event);
switches 0:5c4d7b2438d3 168 return 0;
switches 0:5c4d7b2438d3 169 }
switches 0:5c4d7b2438d3 170
switches 0:5c4d7b2438d3 171 void SerialBase::start_write(const void *buffer, int buffer_size, char buffer_width, const event_callback_t& callback, int event)
switches 0:5c4d7b2438d3 172 {
switches 0:5c4d7b2438d3 173 _tx_callback = callback;
switches 0:5c4d7b2438d3 174
switches 0:5c4d7b2438d3 175 _thunk_irq.callback(&SerialBase::interrupt_handler_asynch);
switches 0:5c4d7b2438d3 176 serial_tx_asynch(&_serial, buffer, buffer_size, buffer_width, _thunk_irq.entry(), event, _tx_usage);
switches 0:5c4d7b2438d3 177 }
switches 0:5c4d7b2438d3 178
switches 0:5c4d7b2438d3 179 void SerialBase::abort_write(void)
switches 0:5c4d7b2438d3 180 {
switches 0:5c4d7b2438d3 181 serial_tx_abort_asynch(&_serial);
switches 0:5c4d7b2438d3 182 }
switches 0:5c4d7b2438d3 183
switches 0:5c4d7b2438d3 184 void SerialBase::abort_read(void)
switches 0:5c4d7b2438d3 185 {
switches 0:5c4d7b2438d3 186 serial_rx_abort_asynch(&_serial);
switches 0:5c4d7b2438d3 187 }
switches 0:5c4d7b2438d3 188
switches 0:5c4d7b2438d3 189 int SerialBase::set_dma_usage_tx(DMAUsage usage)
switches 0:5c4d7b2438d3 190 {
switches 0:5c4d7b2438d3 191 if (serial_tx_active(&_serial)) {
switches 0:5c4d7b2438d3 192 return -1;
switches 0:5c4d7b2438d3 193 }
switches 0:5c4d7b2438d3 194 _tx_usage = usage;
switches 0:5c4d7b2438d3 195 return 0;
switches 0:5c4d7b2438d3 196 }
switches 0:5c4d7b2438d3 197
switches 0:5c4d7b2438d3 198 int SerialBase::set_dma_usage_rx(DMAUsage usage)
switches 0:5c4d7b2438d3 199 {
switches 0:5c4d7b2438d3 200 if (serial_tx_active(&_serial)) {
switches 0:5c4d7b2438d3 201 return -1;
switches 0:5c4d7b2438d3 202 }
switches 0:5c4d7b2438d3 203 _rx_usage = usage;
switches 0:5c4d7b2438d3 204 return 0;
switches 0:5c4d7b2438d3 205 }
switches 0:5c4d7b2438d3 206
switches 0:5c4d7b2438d3 207 int SerialBase::read(uint8_t *buffer, int length, const event_callback_t& callback, int event, unsigned char char_match)
switches 0:5c4d7b2438d3 208 {
switches 0:5c4d7b2438d3 209 if (serial_rx_active(&_serial)) {
switches 0:5c4d7b2438d3 210 return -1; // transaction ongoing
switches 0:5c4d7b2438d3 211 }
switches 0:5c4d7b2438d3 212 start_read((void*)buffer, length, 8, callback, event, char_match);
switches 0:5c4d7b2438d3 213 return 0;
switches 0:5c4d7b2438d3 214 }
switches 0:5c4d7b2438d3 215
switches 0:5c4d7b2438d3 216
switches 0:5c4d7b2438d3 217 int SerialBase::read(uint16_t *buffer, int length, const event_callback_t& callback, int event, unsigned char char_match)
switches 0:5c4d7b2438d3 218 {
switches 0:5c4d7b2438d3 219 if (serial_rx_active(&_serial)) {
switches 0:5c4d7b2438d3 220 return -1; // transaction ongoing
switches 0:5c4d7b2438d3 221 }
switches 0:5c4d7b2438d3 222 start_read((void*)buffer, length, 16, callback, event, char_match);
switches 0:5c4d7b2438d3 223 return 0;
switches 0:5c4d7b2438d3 224 }
switches 0:5c4d7b2438d3 225
switches 0:5c4d7b2438d3 226
switches 0:5c4d7b2438d3 227 void SerialBase::start_read(void *buffer, int buffer_size, char buffer_width, const event_callback_t& callback, int event, unsigned char char_match)
switches 0:5c4d7b2438d3 228 {
switches 0:5c4d7b2438d3 229 _rx_callback = callback;
switches 0:5c4d7b2438d3 230 _thunk_irq.callback(&SerialBase::interrupt_handler_asynch);
switches 0:5c4d7b2438d3 231 serial_rx_asynch(&_serial, buffer, buffer_size, buffer_width, _thunk_irq.entry(), event, char_match, _rx_usage);
switches 0:5c4d7b2438d3 232 }
switches 0:5c4d7b2438d3 233
switches 0:5c4d7b2438d3 234 void SerialBase::interrupt_handler_asynch(void)
switches 0:5c4d7b2438d3 235 {
switches 0:5c4d7b2438d3 236 int event = serial_irq_handler_asynch(&_serial);
switches 0:5c4d7b2438d3 237 int rx_event = event & SERIAL_EVENT_RX_MASK;
switches 0:5c4d7b2438d3 238 if (_rx_callback && rx_event) {
switches 0:5c4d7b2438d3 239 _rx_callback.call(rx_event);
switches 0:5c4d7b2438d3 240 }
switches 0:5c4d7b2438d3 241
switches 0:5c4d7b2438d3 242 int tx_event = event & SERIAL_EVENT_TX_MASK;
switches 0:5c4d7b2438d3 243 if (_tx_callback && tx_event) {
switches 0:5c4d7b2438d3 244 _tx_callback.call(tx_event);
switches 0:5c4d7b2438d3 245 }
switches 0:5c4d7b2438d3 246 }
switches 0:5c4d7b2438d3 247
switches 0:5c4d7b2438d3 248 #endif
switches 0:5c4d7b2438d3 249
switches 0:5c4d7b2438d3 250 } // namespace mbed
switches 0:5c4d7b2438d3 251
switches 0:5c4d7b2438d3 252 #endif