added prescaler for 16 bit pwm in LPC1347 target
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Diff: common/SerialBase.cpp
- Revision:
- 144:ef7eb2e8f9f7
- Parent:
- 0:9b334a45a8ff
--- a/common/SerialBase.cpp Tue Aug 02 14:07:36 2016 +0000 +++ b/common/SerialBase.cpp Fri Sep 02 15:07:44 2016 +0100 @@ -1,212 +1,244 @@ -/* 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 +/* 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" +#include "critical.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) { + // No lock needed in the constructor + + serial_init(&_serial, tx, rx); + serial_irq_handler(&_serial, SerialBase::_irq_handler, (uint32_t)this); +} + +void SerialBase::baud(int baudrate) { + lock(); + serial_baud(&_serial, baudrate); + _baud = baudrate; + unlock(); +} + +void SerialBase::format(int bits, Parity parity, int stop_bits) { + lock(); + serial_format(&_serial, bits, (SerialParity)parity, stop_bits); + unlock(); +} + +int SerialBase::readable() { + lock(); + int ret = serial_readable(&_serial); + unlock(); + return ret; +} + + +int SerialBase::writeable() { + lock(); + int ret = serial_writable(&_serial); + unlock(); + return ret; +} + +void SerialBase::attach(Callback<void()> func, IrqType type) { + lock(); + // Disable interrupts when attaching interrupt handler + core_util_critical_section_enter(); + if (func) { + _irq[type].attach(func); + serial_irq_set(&_serial, (SerialIrq)type, 1); + } else { + serial_irq_set(&_serial, (SerialIrq)type, 0); + } + core_util_critical_section_exit(); + unlock(); +} + +void SerialBase::_irq_handler(uint32_t id, SerialIrq irq_type) { + SerialBase *handler = (SerialBase*)id; + handler->_irq[irq_type].call(); +} + +int SerialBase::_base_getc() { + // Mutex is already held + return serial_getc(&_serial); +} + +int SerialBase::_base_putc(int c) { + // Mutex is already held + serial_putc(&_serial, c); + return c; +} + +void SerialBase::send_break() { + lock(); + // 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); + unlock(); +} + +void SerialBase::lock() { + // Stub +} + +void SerialBase:: unlock() { + // Stub +} + +#if DEVICE_SERIAL_FC +void SerialBase::set_flow_control(Flow type, PinName flow1, PinName flow2) { + lock(); + 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; + } + unlock(); +} +#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