From Ben Katz mbed-dev library. Removed unnecessary target files to reduce the overall size by a factor of 10 to make it easier to import into the online IDE.
Dependents: motor_driver motor_driver_screaming_fix
Diff: drivers/RawSerial.cpp
- Revision:
- 0:083111ae2a11
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/drivers/RawSerial.cpp Thu Nov 26 04:08:56 2020 +0000 @@ -0,0 +1,95 @@ +/* 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 "drivers/RawSerial.h" +#include "platform/mbed_wait_api.h" +#include <stdio.h> +#include <cstdarg> + + +#if DEVICE_SERIAL + +#define STRING_STACK_LIMIT 120 + +namespace mbed { + +RawSerial::RawSerial(PinName tx, PinName rx, int baud) : SerialBase(tx, rx, baud) { + // No lock needed in the constructor +} + +int RawSerial::getc() { + lock(); + int ret = _base_getc(); + unlock(); + return ret; +} + +int RawSerial::putc(int c) { + lock(); + int ret = _base_putc(c); + unlock(); + return ret; +} + +int RawSerial::puts(const char *str) { + lock(); + while (*str) + putc(*str ++); + unlock(); + return 0; +} + +// Experimental support for printf in RawSerial. No Stream inheritance +// means we can't call printf() directly, so we use sprintf() instead. +// We only call malloc() for the sprintf() buffer if the buffer +// length is above a certain threshold, otherwise we use just the stack. +int RawSerial::printf(const char *format, ...) { + lock(); + std::va_list arg; + va_start(arg, format); + // ARMCC microlib does not properly handle a size of 0. + // As a workaround supply a dummy buffer with a size of 1. + char dummy_buf[1]; + int len = vsnprintf(dummy_buf, sizeof(dummy_buf), format, arg); + if (len < STRING_STACK_LIMIT) { + char temp[STRING_STACK_LIMIT]; + vsprintf(temp, format, arg); + puts(temp); + } else { + char *temp = new char[len + 1]; + vsprintf(temp, format, arg); + puts(temp); + delete[] temp; + } + va_end(arg); + unlock(); + return len; +} + +/** Acquire exclusive access to this serial port + */ +void RawSerial::lock() { + // No lock used - external synchronization required +} + +/** Release exclusive access to this serial port + */ +void RawSerial::unlock() { + // No lock used - external synchronization required +} + +} // namespace mbed + +#endif