Yihui Xiong
/
Seeed_nRF51822_Motion
initial
Diff: mbed-src/common/SerialBase.cpp
- Revision:
- 1:9d3b497333c0
- Parent:
- 0:638edba3adf6
--- a/mbed-src/common/SerialBase.cpp Mon Jan 11 02:32:24 2016 +0000 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,212 +0,0 @@ -/* mbed Microcontroller Library - * Copyright (c) 2006-2013 ARM Limited - * - * Licensed under the Apache License, Version 2.0 (the "License"); - * you may not use this file except in compliance with the License. - * You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - */ -#include "SerialBase.h" -#include "wait_api.h" - -#if DEVICE_SERIAL - -namespace mbed { - -SerialBase::SerialBase(PinName tx, PinName rx) : -#if DEVICE_SERIAL_ASYNCH - _thunk_irq(this), _tx_usage(DMA_USAGE_NEVER), - _rx_usage(DMA_USAGE_NEVER), -#endif - _serial(), _baud(9600) { - serial_init(&_serial, tx, rx); - serial_irq_handler(&_serial, SerialBase::_irq_handler, (uint32_t)this); -} - -void SerialBase::baud(int baudrate) { - serial_baud(&_serial, baudrate); - _baud = baudrate; -} - -void SerialBase::format(int bits, Parity parity, int stop_bits) { - serial_format(&_serial, bits, (SerialParity)parity, stop_bits); -} - -int SerialBase::readable() { - return serial_readable(&_serial); -} - - -int SerialBase::writeable() { - return serial_writable(&_serial); -} - -void SerialBase::attach(void (*fptr)(void), IrqType type) { - if (fptr) { - _irq[type].attach(fptr); - serial_irq_set(&_serial, (SerialIrq)type, 1); - } else { - serial_irq_set(&_serial, (SerialIrq)type, 0); - } -} - -void SerialBase::_irq_handler(uint32_t id, SerialIrq irq_type) { - SerialBase *handler = (SerialBase*)id; - handler->_irq[irq_type].call(); -} - -int SerialBase::_base_getc() { - return serial_getc(&_serial); -} - -int SerialBase::_base_putc(int c) { - serial_putc(&_serial, c); - return c; -} - -void SerialBase::send_break() { - // Wait for 1.5 frames before clearing the break condition - // This will have different effects on our platforms, but should - // ensure that we keep the break active for at least one frame. - // We consider a full frame (1 start bit + 8 data bits bits + - // 1 parity bit + 2 stop bits = 12 bits) for computation. - // One bit time (in us) = 1000000/_baud - // Twelve bits: 12000000/baud delay - // 1.5 frames: 18000000/baud delay - serial_break_set(&_serial); - wait_us(18000000/_baud); - serial_break_clear(&_serial); -} - -#if DEVICE_SERIAL_FC -void SerialBase::set_flow_control(Flow type, PinName flow1, PinName flow2) { - FlowControl flow_type = (FlowControl)type; - switch(type) { - case RTS: - serial_set_flow_control(&_serial, flow_type, flow1, NC); - break; - - case CTS: - serial_set_flow_control(&_serial, flow_type, NC, flow1); - break; - - case RTSCTS: - case Disabled: - serial_set_flow_control(&_serial, flow_type, flow1, flow2); - break; - - default: - break; - } -} -#endif - -#if DEVICE_SERIAL_ASYNCH - -int SerialBase::write(const uint8_t *buffer, int length, const event_callback_t& callback, int event) -{ - if (serial_tx_active(&_serial)) { - return -1; // transaction ongoing - } - start_write((void *)buffer, length, 8, callback, event); - return 0; -} - -int SerialBase::write(const uint16_t *buffer, int length, const event_callback_t& callback, int event) -{ - if (serial_tx_active(&_serial)) { - return -1; // transaction ongoing - } - start_write((void *)buffer, length, 16, callback, event); - return 0; -} - -void SerialBase::start_write(const void *buffer, int buffer_size, char buffer_width, const event_callback_t& callback, int event) -{ - _tx_callback = callback; - - _thunk_irq.callback(&SerialBase::interrupt_handler_asynch); - serial_tx_asynch(&_serial, buffer, buffer_size, buffer_width, _thunk_irq.entry(), event, _tx_usage); -} - -void SerialBase::abort_write(void) -{ - serial_tx_abort_asynch(&_serial); -} - -void SerialBase::abort_read(void) -{ - serial_rx_abort_asynch(&_serial); -} - -int SerialBase::set_dma_usage_tx(DMAUsage usage) -{ - if (serial_tx_active(&_serial)) { - return -1; - } - _tx_usage = usage; - return 0; -} - -int SerialBase::set_dma_usage_rx(DMAUsage usage) -{ - if (serial_tx_active(&_serial)) { - return -1; - } - _rx_usage = usage; - return 0; -} - -int SerialBase::read(uint8_t *buffer, int length, const event_callback_t& callback, int event, unsigned char char_match) -{ - if (serial_rx_active(&_serial)) { - return -1; // transaction ongoing - } - start_read((void*)buffer, length, 8, callback, event, char_match); - return 0; -} - - -int SerialBase::read(uint16_t *buffer, int length, const event_callback_t& callback, int event, unsigned char char_match) -{ - if (serial_rx_active(&_serial)) { - return -1; // transaction ongoing - } - start_read((void*)buffer, length, 16, callback, event, char_match); - return 0; -} - - -void SerialBase::start_read(void *buffer, int buffer_size, char buffer_width, const event_callback_t& callback, int event, unsigned char char_match) -{ - _rx_callback = callback; - _thunk_irq.callback(&SerialBase::interrupt_handler_asynch); - serial_rx_asynch(&_serial, buffer, buffer_size, buffer_width, _thunk_irq.entry(), event, char_match, _rx_usage); -} - -void SerialBase::interrupt_handler_asynch(void) -{ - int event = serial_irq_handler_asynch(&_serial); - int rx_event = event & SERIAL_EVENT_RX_MASK; - if (_rx_callback && rx_event) { - _rx_callback.call(rx_event); - } - - int tx_event = event & SERIAL_EVENT_TX_MASK; - if (_tx_callback && tx_event) { - _tx_callback.call(tx_event); - } -} - -#endif - -} // namespace mbed - -#endif