Diff: common/SerialBase.cpp

Revision:

36:ab3ee77451e7

Child:

64:7b352733b00a

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/common/SerialBase.cpp	Wed Oct 23 14:15:04 2013 +0100
@@ -0,0 +1,86 @@
+/* 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) {
+    serial_init(&_serial, tx, rx);
+    _baud = 9600;
+    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);
+}
+
+} // namespace mbed
+
+#endif