Diff: common/SerialBase.cpp

Revision:

525:c320967f86b9

Parent:

212:34d62c0b2af6

--- a/common/SerialBase.cpp	Mon Apr 27 09:45:08 2015 +0100
+++ b/common/SerialBase.cpp	Tue Apr 28 11:45:12 2015 +0100
@@ -20,7 +20,12 @@
 
 namespace mbed {
 
-SerialBase::SerialBase(PinName tx, PinName rx) : _serial(), _baud(9600) {
+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);
 }
@@ -103,6 +108,105 @@
 }
 #endif
 
+#if DEVICE_SERIAL_ASYNCH
+
+int SerialBase::write(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(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(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