PHung Tung / SRC_STM32F7

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common/SerialBase.cpp@0:e87aa4c49e95, 2019-06-04 (annotated)

Committer:
phungductung
Date:
Tue Jun 04 21:51:46 2019 +0000
Revision:
0:e87aa4c49e95
libray

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phungductung 0:e87aa4c49e95 1 /* mbed Microcontroller Library
phungductung 0:e87aa4c49e95 2 * Copyright (c) 2006-2013 ARM Limited
phungductung 0:e87aa4c49e95 3 *
phungductung 0:e87aa4c49e95 4 * Licensed under the Apache License, Version 2.0 (the "License");
phungductung 0:e87aa4c49e95 5 * you may not use this file except in compliance with the License.
phungductung 0:e87aa4c49e95 6 * You may obtain a copy of the License at
phungductung 0:e87aa4c49e95 7 *
phungductung 0:e87aa4c49e95 8 * http://www.apache.org/licenses/LICENSE-2.0
phungductung 0:e87aa4c49e95 9 *
phungductung 0:e87aa4c49e95 10 * Unless required by applicable law or agreed to in writing, software
phungductung 0:e87aa4c49e95 11 * distributed under the License is distributed on an "AS IS" BASIS,
phungductung 0:e87aa4c49e95 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
phungductung 0:e87aa4c49e95 13 * See the License for the specific language governing permissions and
phungductung 0:e87aa4c49e95 14 * limitations under the License.
phungductung 0:e87aa4c49e95 15 */
phungductung 0:e87aa4c49e95 16 #include "SerialBase.h"
phungductung 0:e87aa4c49e95 17 #include "wait_api.h"
phungductung 0:e87aa4c49e95 18
phungductung 0:e87aa4c49e95 19 #if DEVICE_SERIAL
phungductung 0:e87aa4c49e95 20
phungductung 0:e87aa4c49e95 21 namespace mbed {
phungductung 0:e87aa4c49e95 22
phungductung 0:e87aa4c49e95 23 SerialBase::SerialBase(PinName tx, PinName rx) :
phungductung 0:e87aa4c49e95 24 #if DEVICE_SERIAL_ASYNCH
phungductung 0:e87aa4c49e95 25 _thunk_irq(this), _tx_usage(DMA_USAGE_NEVER),
phungductung 0:e87aa4c49e95 26 _rx_usage(DMA_USAGE_NEVER),
phungductung 0:e87aa4c49e95 27 #endif
phungductung 0:e87aa4c49e95 28 _serial(), _baud(9600) {
phungductung 0:e87aa4c49e95 29 serial_init(&_serial, tx, rx);
phungductung 0:e87aa4c49e95 30 serial_irq_handler(&_serial, SerialBase::_irq_handler, (uint32_t)this);
phungductung 0:e87aa4c49e95 31 }
phungductung 0:e87aa4c49e95 32
phungductung 0:e87aa4c49e95 33 void SerialBase::baud(int baudrate) {
phungductung 0:e87aa4c49e95 34 serial_baud(&_serial, baudrate);
phungductung 0:e87aa4c49e95 35 _baud = baudrate;
phungductung 0:e87aa4c49e95 36 }
phungductung 0:e87aa4c49e95 37
phungductung 0:e87aa4c49e95 38 void SerialBase::format(int bits, Parity parity, int stop_bits) {
phungductung 0:e87aa4c49e95 39 serial_format(&_serial, bits, (SerialParity)parity, stop_bits);
phungductung 0:e87aa4c49e95 40 }
phungductung 0:e87aa4c49e95 41
phungductung 0:e87aa4c49e95 42 int SerialBase::readable() {
phungductung 0:e87aa4c49e95 43 return serial_readable(&_serial);
phungductung 0:e87aa4c49e95 44 }
phungductung 0:e87aa4c49e95 45
phungductung 0:e87aa4c49e95 46
phungductung 0:e87aa4c49e95 47 int SerialBase::writeable() {
phungductung 0:e87aa4c49e95 48 return serial_writable(&_serial);
phungductung 0:e87aa4c49e95 49 }
phungductung 0:e87aa4c49e95 50
phungductung 0:e87aa4c49e95 51 void SerialBase::attach(void (*fptr)(void), IrqType type) {
phungductung 0:e87aa4c49e95 52 if (fptr) {
phungductung 0:e87aa4c49e95 53 _irq[type].attach(fptr);
phungductung 0:e87aa4c49e95 54 serial_irq_set(&_serial, (SerialIrq)type, 1);
phungductung 0:e87aa4c49e95 55 } else {
phungductung 0:e87aa4c49e95 56 serial_irq_set(&_serial, (SerialIrq)type, 0);
phungductung 0:e87aa4c49e95 57 }
phungductung 0:e87aa4c49e95 58 }
phungductung 0:e87aa4c49e95 59
phungductung 0:e87aa4c49e95 60 void SerialBase::_irq_handler(uint32_t id, SerialIrq irq_type) {
phungductung 0:e87aa4c49e95 61 SerialBase *handler = (SerialBase*)id;
phungductung 0:e87aa4c49e95 62 handler->_irq[irq_type].call();
phungductung 0:e87aa4c49e95 63 }
phungductung 0:e87aa4c49e95 64
phungductung 0:e87aa4c49e95 65 int SerialBase::_base_getc() {
phungductung 0:e87aa4c49e95 66 return serial_getc(&_serial);
phungductung 0:e87aa4c49e95 67 }
phungductung 0:e87aa4c49e95 68
phungductung 0:e87aa4c49e95 69 int SerialBase::_base_putc(int c) {
phungductung 0:e87aa4c49e95 70 serial_putc(&_serial, c);
phungductung 0:e87aa4c49e95 71 return c;
phungductung 0:e87aa4c49e95 72 }
phungductung 0:e87aa4c49e95 73
phungductung 0:e87aa4c49e95 74 void SerialBase::send_break() {
phungductung 0:e87aa4c49e95 75 // Wait for 1.5 frames before clearing the break condition
phungductung 0:e87aa4c49e95 76 // This will have different effects on our platforms, but should
phungductung 0:e87aa4c49e95 77 // ensure that we keep the break active for at least one frame.
phungductung 0:e87aa4c49e95 78 // We consider a full frame (1 start bit + 8 data bits bits +
phungductung 0:e87aa4c49e95 79 // 1 parity bit + 2 stop bits = 12 bits) for computation.
phungductung 0:e87aa4c49e95 80 // One bit time (in us) = 1000000/_baud
phungductung 0:e87aa4c49e95 81 // Twelve bits: 12000000/baud delay
phungductung 0:e87aa4c49e95 82 // 1.5 frames: 18000000/baud delay
phungductung 0:e87aa4c49e95 83 serial_break_set(&_serial);
phungductung 0:e87aa4c49e95 84 wait_us(18000000/_baud);
phungductung 0:e87aa4c49e95 85 serial_break_clear(&_serial);
phungductung 0:e87aa4c49e95 86 }
phungductung 0:e87aa4c49e95 87
phungductung 0:e87aa4c49e95 88 #if DEVICE_SERIAL_FC
phungductung 0:e87aa4c49e95 89 void SerialBase::set_flow_control(Flow type, PinName flow1, PinName flow2) {
phungductung 0:e87aa4c49e95 90 FlowControl flow_type = (FlowControl)type;
phungductung 0:e87aa4c49e95 91 switch(type) {
phungductung 0:e87aa4c49e95 92 case RTS:
phungductung 0:e87aa4c49e95 93 serial_set_flow_control(&_serial, flow_type, flow1, NC);
phungductung 0:e87aa4c49e95 94 break;
phungductung 0:e87aa4c49e95 95
phungductung 0:e87aa4c49e95 96 case CTS:
phungductung 0:e87aa4c49e95 97 serial_set_flow_control(&_serial, flow_type, NC, flow1);
phungductung 0:e87aa4c49e95 98 break;
phungductung 0:e87aa4c49e95 99
phungductung 0:e87aa4c49e95 100 case RTSCTS:
phungductung 0:e87aa4c49e95 101 case Disabled:
phungductung 0:e87aa4c49e95 102 serial_set_flow_control(&_serial, flow_type, flow1, flow2);
phungductung 0:e87aa4c49e95 103 break;
phungductung 0:e87aa4c49e95 104
phungductung 0:e87aa4c49e95 105 default:
phungductung 0:e87aa4c49e95 106 break;
phungductung 0:e87aa4c49e95 107 }
phungductung 0:e87aa4c49e95 108 }
phungductung 0:e87aa4c49e95 109 #endif
phungductung 0:e87aa4c49e95 110
phungductung 0:e87aa4c49e95 111 #if DEVICE_SERIAL_ASYNCH
phungductung 0:e87aa4c49e95 112
phungductung 0:e87aa4c49e95 113 int SerialBase::write(const uint8_t *buffer, int length, const event_callback_t& callback, int event)
phungductung 0:e87aa4c49e95 114 {
phungductung 0:e87aa4c49e95 115 if (serial_tx_active(&_serial)) {
phungductung 0:e87aa4c49e95 116 return -1; // transaction ongoing
phungductung 0:e87aa4c49e95 117 }
phungductung 0:e87aa4c49e95 118 start_write((void *)buffer, length, 8, callback, event);
phungductung 0:e87aa4c49e95 119 return 0;
phungductung 0:e87aa4c49e95 120 }
phungductung 0:e87aa4c49e95 121
phungductung 0:e87aa4c49e95 122 int SerialBase::write(const uint16_t *buffer, int length, const event_callback_t& callback, int event)
phungductung 0:e87aa4c49e95 123 {
phungductung 0:e87aa4c49e95 124 if (serial_tx_active(&_serial)) {
phungductung 0:e87aa4c49e95 125 return -1; // transaction ongoing
phungductung 0:e87aa4c49e95 126 }
phungductung 0:e87aa4c49e95 127 start_write((void *)buffer, length, 16, callback, event);
phungductung 0:e87aa4c49e95 128 return 0;
phungductung 0:e87aa4c49e95 129 }
phungductung 0:e87aa4c49e95 130
phungductung 0:e87aa4c49e95 131 void SerialBase::start_write(const void *buffer, int buffer_size, char buffer_width, const event_callback_t& callback, int event)
phungductung 0:e87aa4c49e95 132 {
phungductung 0:e87aa4c49e95 133 _tx_callback = callback;
phungductung 0:e87aa4c49e95 134
phungductung 0:e87aa4c49e95 135 _thunk_irq.callback(&SerialBase::interrupt_handler_asynch);
phungductung 0:e87aa4c49e95 136 serial_tx_asynch(&_serial, buffer, buffer_size, buffer_width, _thunk_irq.entry(), event, _tx_usage);
phungductung 0:e87aa4c49e95 137 }
phungductung 0:e87aa4c49e95 138
phungductung 0:e87aa4c49e95 139 void SerialBase::abort_write(void)
phungductung 0:e87aa4c49e95 140 {
phungductung 0:e87aa4c49e95 141 serial_tx_abort_asynch(&_serial);
phungductung 0:e87aa4c49e95 142 }
phungductung 0:e87aa4c49e95 143
phungductung 0:e87aa4c49e95 144 void SerialBase::abort_read(void)
phungductung 0:e87aa4c49e95 145 {
phungductung 0:e87aa4c49e95 146 serial_rx_abort_asynch(&_serial);
phungductung 0:e87aa4c49e95 147 }
phungductung 0:e87aa4c49e95 148
phungductung 0:e87aa4c49e95 149 int SerialBase::set_dma_usage_tx(DMAUsage usage)
phungductung 0:e87aa4c49e95 150 {
phungductung 0:e87aa4c49e95 151 if (serial_tx_active(&_serial)) {
phungductung 0:e87aa4c49e95 152 return -1;
phungductung 0:e87aa4c49e95 153 }
phungductung 0:e87aa4c49e95 154 _tx_usage = usage;
phungductung 0:e87aa4c49e95 155 return 0;
phungductung 0:e87aa4c49e95 156 }
phungductung 0:e87aa4c49e95 157
phungductung 0:e87aa4c49e95 158 int SerialBase::set_dma_usage_rx(DMAUsage usage)
phungductung 0:e87aa4c49e95 159 {
phungductung 0:e87aa4c49e95 160 if (serial_tx_active(&_serial)) {
phungductung 0:e87aa4c49e95 161 return -1;
phungductung 0:e87aa4c49e95 162 }
phungductung 0:e87aa4c49e95 163 _rx_usage = usage;
phungductung 0:e87aa4c49e95 164 return 0;
phungductung 0:e87aa4c49e95 165 }
phungductung 0:e87aa4c49e95 166
phungductung 0:e87aa4c49e95 167 int SerialBase::read(uint8_t *buffer, int length, const event_callback_t& callback, int event, unsigned char char_match)
phungductung 0:e87aa4c49e95 168 {
phungductung 0:e87aa4c49e95 169 if (serial_rx_active(&_serial)) {
phungductung 0:e87aa4c49e95 170 return -1; // transaction ongoing
phungductung 0:e87aa4c49e95 171 }
phungductung 0:e87aa4c49e95 172 start_read((void*)buffer, length, 8, callback, event, char_match);
phungductung 0:e87aa4c49e95 173 return 0;
phungductung 0:e87aa4c49e95 174 }
phungductung 0:e87aa4c49e95 175
phungductung 0:e87aa4c49e95 176
phungductung 0:e87aa4c49e95 177 int SerialBase::read(uint16_t *buffer, int length, const event_callback_t& callback, int event, unsigned char char_match)
phungductung 0:e87aa4c49e95 178 {
phungductung 0:e87aa4c49e95 179 if (serial_rx_active(&_serial)) {
phungductung 0:e87aa4c49e95 180 return -1; // transaction ongoing
phungductung 0:e87aa4c49e95 181 }
phungductung 0:e87aa4c49e95 182 start_read((void*)buffer, length, 16, callback, event, char_match);
phungductung 0:e87aa4c49e95 183 return 0;
phungductung 0:e87aa4c49e95 184 }
phungductung 0:e87aa4c49e95 185
phungductung 0:e87aa4c49e95 186
phungductung 0:e87aa4c49e95 187 void SerialBase::start_read(void *buffer, int buffer_size, char buffer_width, const event_callback_t& callback, int event, unsigned char char_match)
phungductung 0:e87aa4c49e95 188 {
phungductung 0:e87aa4c49e95 189 _rx_callback = callback;
phungductung 0:e87aa4c49e95 190 _thunk_irq.callback(&SerialBase::interrupt_handler_asynch);
phungductung 0:e87aa4c49e95 191 serial_rx_asynch(&_serial, buffer, buffer_size, buffer_width, _thunk_irq.entry(), event, char_match, _rx_usage);
phungductung 0:e87aa4c49e95 192 }
phungductung 0:e87aa4c49e95 193
phungductung 0:e87aa4c49e95 194 void SerialBase::interrupt_handler_asynch(void)
phungductung 0:e87aa4c49e95 195 {
phungductung 0:e87aa4c49e95 196 int event = serial_irq_handler_asynch(&_serial);
phungductung 0:e87aa4c49e95 197 int rx_event = event & SERIAL_EVENT_RX_MASK;
phungductung 0:e87aa4c49e95 198 if (_rx_callback && rx_event) {
phungductung 0:e87aa4c49e95 199 _rx_callback.call(rx_event);
phungductung 0:e87aa4c49e95 200 }
phungductung 0:e87aa4c49e95 201
phungductung 0:e87aa4c49e95 202 int tx_event = event & SERIAL_EVENT_TX_MASK;
phungductung 0:e87aa4c49e95 203 if (_tx_callback && tx_event) {
phungductung 0:e87aa4c49e95 204 _tx_callback.call(tx_event);
phungductung 0:e87aa4c49e95 205 }
phungductung 0:e87aa4c49e95 206 }
phungductung 0:e87aa4c49e95 207
phungductung 0:e87aa4c49e95 208 #endif
phungductung 0:e87aa4c49e95 209
phungductung 0:e87aa4c49e95 210 } // namespace mbed
phungductung 0:e87aa4c49e95 211
phungductung 0:e87aa4c49e95 212 #endif