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