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mbed_src_STM32F7/common/SerialBase.cpp@0:aa3fc5ad02f7, 2019-06-04 (annotated)

Committer:
phungductung
Date:
Tue Jun 04 09:08:29 2019 +0000
Revision:
0:aa3fc5ad02f7
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phungductung 0:aa3fc5ad02f7 1 /* mbed Microcontroller Library
phungductung 0:aa3fc5ad02f7 2 * Copyright (c) 2006-2013 ARM Limited
phungductung 0:aa3fc5ad02f7 3 *
phungductung 0:aa3fc5ad02f7 4 * Licensed under the Apache License, Version 2.0 (the "License");
phungductung 0:aa3fc5ad02f7 5 * you may not use this file except in compliance with the License.
phungductung 0:aa3fc5ad02f7 6 * You may obtain a copy of the License at
phungductung 0:aa3fc5ad02f7 7 *
phungductung 0:aa3fc5ad02f7 8 * http://www.apache.org/licenses/LICENSE-2.0
phungductung 0:aa3fc5ad02f7 9 *
phungductung 0:aa3fc5ad02f7 10 * Unless required by applicable law or agreed to in writing, software
phungductung 0:aa3fc5ad02f7 11 * distributed under the License is distributed on an "AS IS" BASIS,
phungductung 0:aa3fc5ad02f7 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
phungductung 0:aa3fc5ad02f7 13 * See the License for the specific language governing permissions and
phungductung 0:aa3fc5ad02f7 14 * limitations under the License.
phungductung 0:aa3fc5ad02f7 15 */
phungductung 0:aa3fc5ad02f7 16 #include "SerialBase.h"
phungductung 0:aa3fc5ad02f7 17 #include "wait_api.h"
phungductung 0:aa3fc5ad02f7 18
phungductung 0:aa3fc5ad02f7 19 #if DEVICE_SERIAL
phungductung 0:aa3fc5ad02f7 20
phungductung 0:aa3fc5ad02f7 21 namespace mbed {
phungductung 0:aa3fc5ad02f7 22
phungductung 0:aa3fc5ad02f7 23 SerialBase::SerialBase(PinName tx, PinName rx) :
phungductung 0:aa3fc5ad02f7 24 #if DEVICE_SERIAL_ASYNCH
phungductung 0:aa3fc5ad02f7 25 _thunk_irq(this), _tx_usage(DMA_USAGE_NEVER),
phungductung 0:aa3fc5ad02f7 26 _rx_usage(DMA_USAGE_NEVER),
phungductung 0:aa3fc5ad02f7 27 #endif
phungductung 0:aa3fc5ad02f7 28 _serial(), _baud(9600) {
phungductung 0:aa3fc5ad02f7 29 serial_init(&_serial, tx, rx);
phungductung 0:aa3fc5ad02f7 30 serial_irq_handler(&_serial, SerialBase::_irq_handler, (uint32_t)this);
phungductung 0:aa3fc5ad02f7 31 }
phungductung 0:aa3fc5ad02f7 32
phungductung 0:aa3fc5ad02f7 33 void SerialBase::baud(int baudrate) {
phungductung 0:aa3fc5ad02f7 34 serial_baud(&_serial, baudrate);
phungductung 0:aa3fc5ad02f7 35 _baud = baudrate;
phungductung 0:aa3fc5ad02f7 36 }
phungductung 0:aa3fc5ad02f7 37
phungductung 0:aa3fc5ad02f7 38 void SerialBase::format(int bits, Parity parity, int stop_bits) {
phungductung 0:aa3fc5ad02f7 39 serial_format(&_serial, bits, (SerialParity)parity, stop_bits);
phungductung 0:aa3fc5ad02f7 40 }
phungductung 0:aa3fc5ad02f7 41
phungductung 0:aa3fc5ad02f7 42 int SerialBase::readable() {
phungductung 0:aa3fc5ad02f7 43 return serial_readable(&_serial);
phungductung 0:aa3fc5ad02f7 44 }
phungductung 0:aa3fc5ad02f7 45
phungductung 0:aa3fc5ad02f7 46
phungductung 0:aa3fc5ad02f7 47 int SerialBase::writeable() {
phungductung 0:aa3fc5ad02f7 48 return serial_writable(&_serial);
phungductung 0:aa3fc5ad02f7 49 }
phungductung 0:aa3fc5ad02f7 50
phungductung 0:aa3fc5ad02f7 51 void SerialBase::attach(void (*fptr)(void), IrqType type) {
phungductung 0:aa3fc5ad02f7 52 if (fptr) {
phungductung 0:aa3fc5ad02f7 53 _irq[type].attach(fptr);
phungductung 0:aa3fc5ad02f7 54 serial_irq_set(&_serial, (SerialIrq)type, 1);
phungductung 0:aa3fc5ad02f7 55 } else {
phungductung 0:aa3fc5ad02f7 56 serial_irq_set(&_serial, (SerialIrq)type, 0);
phungductung 0:aa3fc5ad02f7 57 }
phungductung 0:aa3fc5ad02f7 58 }
phungductung 0:aa3fc5ad02f7 59
phungductung 0:aa3fc5ad02f7 60 void SerialBase::_irq_handler(uint32_t id, SerialIrq irq_type) {
phungductung 0:aa3fc5ad02f7 61 SerialBase *handler = (SerialBase*)id;
phungductung 0:aa3fc5ad02f7 62 handler->_irq[irq_type].call();
phungductung 0:aa3fc5ad02f7 63 }
phungductung 0:aa3fc5ad02f7 64
phungductung 0:aa3fc5ad02f7 65 int SerialBase::_base_getc() {
phungductung 0:aa3fc5ad02f7 66 return serial_getc(&_serial);
phungductung 0:aa3fc5ad02f7 67 }
phungductung 0:aa3fc5ad02f7 68
phungductung 0:aa3fc5ad02f7 69 int SerialBase::_base_putc(int c) {
phungductung 0:aa3fc5ad02f7 70 serial_putc(&_serial, c);
phungductung 0:aa3fc5ad02f7 71 return c;
phungductung 0:aa3fc5ad02f7 72 }
phungductung 0:aa3fc5ad02f7 73
phungductung 0:aa3fc5ad02f7 74 void SerialBase::send_break() {
phungductung 0:aa3fc5ad02f7 75 // Wait for 1.5 frames before clearing the break condition
phungductung 0:aa3fc5ad02f7 76 // This will have different effects on our platforms, but should
phungductung 0:aa3fc5ad02f7 77 // ensure that we keep the break active for at least one frame.
phungductung 0:aa3fc5ad02f7 78 // We consider a full frame (1 start bit + 8 data bits bits +
phungductung 0:aa3fc5ad02f7 79 // 1 parity bit + 2 stop bits = 12 bits) for computation.
phungductung 0:aa3fc5ad02f7 80 // One bit time (in us) = 1000000/_baud
phungductung 0:aa3fc5ad02f7 81 // Twelve bits: 12000000/baud delay
phungductung 0:aa3fc5ad02f7 82 // 1.5 frames: 18000000/baud delay
phungductung 0:aa3fc5ad02f7 83 serial_break_set(&_serial);
phungductung 0:aa3fc5ad02f7 84 wait_us(18000000/_baud);
phungductung 0:aa3fc5ad02f7 85 serial_break_clear(&_serial);
phungductung 0:aa3fc5ad02f7 86 }
phungductung 0:aa3fc5ad02f7 87
phungductung 0:aa3fc5ad02f7 88 #if DEVICE_SERIAL_FC
phungductung 0:aa3fc5ad02f7 89 void SerialBase::set_flow_control(Flow type, PinName flow1, PinName flow2) {
phungductung 0:aa3fc5ad02f7 90 FlowControl flow_type = (FlowControl)type;
phungductung 0:aa3fc5ad02f7 91 switch(type) {
phungductung 0:aa3fc5ad02f7 92 case RTS:
phungductung 0:aa3fc5ad02f7 93 serial_set_flow_control(&_serial, flow_type, flow1, NC);
phungductung 0:aa3fc5ad02f7 94 break;
phungductung 0:aa3fc5ad02f7 95
phungductung 0:aa3fc5ad02f7 96 case CTS:
phungductung 0:aa3fc5ad02f7 97 serial_set_flow_control(&_serial, flow_type, NC, flow1);
phungductung 0:aa3fc5ad02f7 98 break;
phungductung 0:aa3fc5ad02f7 99
phungductung 0:aa3fc5ad02f7 100 case RTSCTS:
phungductung 0:aa3fc5ad02f7 101 case Disabled:
phungductung 0:aa3fc5ad02f7 102 serial_set_flow_control(&_serial, flow_type, flow1, flow2);
phungductung 0:aa3fc5ad02f7 103 break;
phungductung 0:aa3fc5ad02f7 104
phungductung 0:aa3fc5ad02f7 105 default:
phungductung 0:aa3fc5ad02f7 106 break;
phungductung 0:aa3fc5ad02f7 107 }
phungductung 0:aa3fc5ad02f7 108 }
phungductung 0:aa3fc5ad02f7 109 #endif
phungductung 0:aa3fc5ad02f7 110
phungductung 0:aa3fc5ad02f7 111 #if DEVICE_SERIAL_ASYNCH
phungductung 0:aa3fc5ad02f7 112
phungductung 0:aa3fc5ad02f7 113 int SerialBase::write(const uint8_t *buffer, int length, const event_callback_t& callback, int event)
phungductung 0:aa3fc5ad02f7 114 {
phungductung 0:aa3fc5ad02f7 115 if (serial_tx_active(&_serial)) {
phungductung 0:aa3fc5ad02f7 116 return -1; // transaction ongoing
phungductung 0:aa3fc5ad02f7 117 }
phungductung 0:aa3fc5ad02f7 118 start_write((void *)buffer, length, 8, callback, event);
phungductung 0:aa3fc5ad02f7 119 return 0;
phungductung 0:aa3fc5ad02f7 120 }
phungductung 0:aa3fc5ad02f7 121
phungductung 0:aa3fc5ad02f7 122 int SerialBase::write(const uint16_t *buffer, int length, const event_callback_t& callback, int event)
phungductung 0:aa3fc5ad02f7 123 {
phungductung 0:aa3fc5ad02f7 124 if (serial_tx_active(&_serial)) {
phungductung 0:aa3fc5ad02f7 125 return -1; // transaction ongoing
phungductung 0:aa3fc5ad02f7 126 }
phungductung 0:aa3fc5ad02f7 127 start_write((void *)buffer, length, 16, callback, event);
phungductung 0:aa3fc5ad02f7 128 return 0;
phungductung 0:aa3fc5ad02f7 129 }
phungductung 0:aa3fc5ad02f7 130
phungductung 0:aa3fc5ad02f7 131 void SerialBase::start_write(const void *buffer, int buffer_size, char buffer_width, const event_callback_t& callback, int event)
phungductung 0:aa3fc5ad02f7 132 {
phungductung 0:aa3fc5ad02f7 133 _tx_callback = callback;
phungductung 0:aa3fc5ad02f7 134
phungductung 0:aa3fc5ad02f7 135 _thunk_irq.callback(&SerialBase::interrupt_handler_asynch);
phungductung 0:aa3fc5ad02f7 136 serial_tx_asynch(&_serial, buffer, buffer_size, buffer_width, _thunk_irq.entry(), event, _tx_usage);
phungductung 0:aa3fc5ad02f7 137 }
phungductung 0:aa3fc5ad02f7 138
phungductung 0:aa3fc5ad02f7 139 void SerialBase::abort_write(void)
phungductung 0:aa3fc5ad02f7 140 {
phungductung 0:aa3fc5ad02f7 141 serial_tx_abort_asynch(&_serial);
phungductung 0:aa3fc5ad02f7 142 }
phungductung 0:aa3fc5ad02f7 143
phungductung 0:aa3fc5ad02f7 144 void SerialBase::abort_read(void)
phungductung 0:aa3fc5ad02f7 145 {
phungductung 0:aa3fc5ad02f7 146 serial_rx_abort_asynch(&_serial);
phungductung 0:aa3fc5ad02f7 147 }
phungductung 0:aa3fc5ad02f7 148
phungductung 0:aa3fc5ad02f7 149 int SerialBase::set_dma_usage_tx(DMAUsage usage)
phungductung 0:aa3fc5ad02f7 150 {
phungductung 0:aa3fc5ad02f7 151 if (serial_tx_active(&_serial)) {
phungductung 0:aa3fc5ad02f7 152 return -1;
phungductung 0:aa3fc5ad02f7 153 }
phungductung 0:aa3fc5ad02f7 154 _tx_usage = usage;
phungductung 0:aa3fc5ad02f7 155 return 0;
phungductung 0:aa3fc5ad02f7 156 }
phungductung 0:aa3fc5ad02f7 157
phungductung 0:aa3fc5ad02f7 158 int SerialBase::set_dma_usage_rx(DMAUsage usage)
phungductung 0:aa3fc5ad02f7 159 {
phungductung 0:aa3fc5ad02f7 160 if (serial_tx_active(&_serial)) {
phungductung 0:aa3fc5ad02f7 161 return -1;
phungductung 0:aa3fc5ad02f7 162 }
phungductung 0:aa3fc5ad02f7 163 _rx_usage = usage;
phungductung 0:aa3fc5ad02f7 164 return 0;
phungductung 0:aa3fc5ad02f7 165 }
phungductung 0:aa3fc5ad02f7 166
phungductung 0:aa3fc5ad02f7 167 int SerialBase::read(uint8_t *buffer, int length, const event_callback_t& callback, int event, unsigned char char_match)
phungductung 0:aa3fc5ad02f7 168 {
phungductung 0:aa3fc5ad02f7 169 if (serial_rx_active(&_serial)) {
phungductung 0:aa3fc5ad02f7 170 return -1; // transaction ongoing
phungductung 0:aa3fc5ad02f7 171 }
phungductung 0:aa3fc5ad02f7 172 start_read((void*)buffer, length, 8, callback, event, char_match);
phungductung 0:aa3fc5ad02f7 173 return 0;
phungductung 0:aa3fc5ad02f7 174 }
phungductung 0:aa3fc5ad02f7 175
phungductung 0:aa3fc5ad02f7 176
phungductung 0:aa3fc5ad02f7 177 int SerialBase::read(uint16_t *buffer, int length, const event_callback_t& callback, int event, unsigned char char_match)
phungductung 0:aa3fc5ad02f7 178 {
phungductung 0:aa3fc5ad02f7 179 if (serial_rx_active(&_serial)) {
phungductung 0:aa3fc5ad02f7 180 return -1; // transaction ongoing
phungductung 0:aa3fc5ad02f7 181 }
phungductung 0:aa3fc5ad02f7 182 start_read((void*)buffer, length, 16, callback, event, char_match);
phungductung 0:aa3fc5ad02f7 183 return 0;
phungductung 0:aa3fc5ad02f7 184 }
phungductung 0:aa3fc5ad02f7 185
phungductung 0:aa3fc5ad02f7 186
phungductung 0:aa3fc5ad02f7 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:aa3fc5ad02f7 188 {
phungductung 0:aa3fc5ad02f7 189 _rx_callback = callback;
phungductung 0:aa3fc5ad02f7 190 _thunk_irq.callback(&SerialBase::interrupt_handler_asynch);
phungductung 0:aa3fc5ad02f7 191 serial_rx_asynch(&_serial, buffer, buffer_size, buffer_width, _thunk_irq.entry(), event, char_match, _rx_usage);
phungductung 0:aa3fc5ad02f7 192 }
phungductung 0:aa3fc5ad02f7 193
phungductung 0:aa3fc5ad02f7 194 void SerialBase::interrupt_handler_asynch(void)
phungductung 0:aa3fc5ad02f7 195 {
phungductung 0:aa3fc5ad02f7 196 int event = serial_irq_handler_asynch(&_serial);
phungductung 0:aa3fc5ad02f7 197 int rx_event = event & SERIAL_EVENT_RX_MASK;
phungductung 0:aa3fc5ad02f7 198 if (_rx_callback && rx_event) {
phungductung 0:aa3fc5ad02f7 199 _rx_callback.call(rx_event);
phungductung 0:aa3fc5ad02f7 200 }
phungductung 0:aa3fc5ad02f7 201
phungductung 0:aa3fc5ad02f7 202 int tx_event = event & SERIAL_EVENT_TX_MASK;
phungductung 0:aa3fc5ad02f7 203 if (_tx_callback && tx_event) {
phungductung 0:aa3fc5ad02f7 204 _tx_callback.call(tx_event);
phungductung 0:aa3fc5ad02f7 205 }
phungductung 0:aa3fc5ad02f7 206 }
phungductung 0:aa3fc5ad02f7 207
phungductung 0:aa3fc5ad02f7 208 #endif
phungductung 0:aa3fc5ad02f7 209
phungductung 0:aa3fc5ad02f7 210 } // namespace mbed
phungductung 0:aa3fc5ad02f7 211
phungductung 0:aa3fc5ad02f7 212 #endif