Igor Lima / mbed-lorawan-pulga-serial_rx

contain lorawan with serial_rx enabled

Dependencies:   pulga-lorawan-drv SPI_MX25R Si1133 BME280

trace_helper.cpp@12:5015dfead3f2, 2018-04-18 (annotated)

Committer:
mbed_official
Date:
Wed Apr 18 06:30:24 2018 +0100
Revision:
12:5015dfead3f2
Parent:
8:7594ad70d2bf
Child:
17:2fc16c1d6434
Reduce example application memory usage



Our currently supported targets DISCO_L072CZ_LRWAN1 and MTB_MURATA_ABZ

only have 20kB of RAM which requires some memory usage optimizations

to LoRa example application especially when compiled with GCC compiler.



This commit reduces application tx and rx buffers to 30 bytes (instead of

255) as application only sends short messages.



Also main thread stack size is reduced to 1024 bytes for these two targets.

NOTE! Due to small stack size, mbed traces cannot be enabled for these targets!



.

Commit copied from https://github.com/ARMmbed/mbed-os-example-lorawan

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 0:7037ed05f54f 1 /**
mbed_official 0:7037ed05f54f 2 * Copyright (c) 2017, Arm Limited and affiliates.
mbed_official 0:7037ed05f54f 3 * SPDX-License-Identifier: Apache-2.0
mbed_official 0:7037ed05f54f 4 *
mbed_official 0:7037ed05f54f 5 * Licensed under the Apache License, Version 2.0 (the "License");
mbed_official 0:7037ed05f54f 6 * you may not use this file except in compliance with the License.
mbed_official 0:7037ed05f54f 7 * You may obtain a copy of the License at
mbed_official 0:7037ed05f54f 8 *
mbed_official 0:7037ed05f54f 9 * http://www.apache.org/licenses/LICENSE-2.0
mbed_official 0:7037ed05f54f 10 *
mbed_official 0:7037ed05f54f 11 * Unless required by applicable law or agreed to in writing, software
mbed_official 0:7037ed05f54f 12 * distributed under the License is distributed on an "AS IS" BASIS,
mbed_official 0:7037ed05f54f 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
mbed_official 0:7037ed05f54f 14 * See the License for the specific language governing permissions and
mbed_official 0:7037ed05f54f 15 * limitations under the License.
mbed_official 0:7037ed05f54f 16 */
mbed_official 0:7037ed05f54f 17
mbed_official 0:7037ed05f54f 18 #include "drivers/Serial.h"
mbed_official 0:7037ed05f54f 19
mbed_official 0:7037ed05f54f 20 /**
mbed_official 0:7037ed05f54f 21 * Serial object for console tracing
mbed_official 0:7037ed05f54f 22 */
mbed_official 0:7037ed05f54f 23 mbed::Serial pc(USBTX, USBRX, MBED_CONF_PLATFORM_DEFAULT_SERIAL_BAUD_RATE);
mbed_official 0:7037ed05f54f 24
mbed_official 0:7037ed05f54f 25 /**
mbed_official 0:7037ed05f54f 26 * If we have tracing library available, we can see traces from within the
mbed_official 0:7037ed05f54f 27 * stack. The library could be made unavailable by removing FEATURE_COMMON_PAL
mbed_official 0:7037ed05f54f 28 * from the mbed_app.json to save RAM.
mbed_official 0:7037ed05f54f 29 */
mbed_official 0:7037ed05f54f 30 #if defined(FEATURE_COMMON_PAL)
mbed_official 0:7037ed05f54f 31
mbed_official 0:7037ed05f54f 32 #include "platform/PlatformMutex.h"
mbed_official 0:7037ed05f54f 33 #include "mbed_trace.h"
mbed_official 0:7037ed05f54f 34
mbed_official 0:7037ed05f54f 35 /**
mbed_official 0:7037ed05f54f 36 * Local mutex object for synchronization
mbed_official 0:7037ed05f54f 37 */
mbed_official 0:7037ed05f54f 38 static PlatformMutex mutex;
mbed_official 0:7037ed05f54f 39
mbed_official 0:7037ed05f54f 40 static void serial_lock();
mbed_official 0:7037ed05f54f 41 static void serial_unlock();
mbed_official 0:7037ed05f54f 42 static void trace_printer(const char* str);
mbed_official 0:7037ed05f54f 43
mbed_official 0:7037ed05f54f 44 /**
mbed_official 0:7037ed05f54f 45 * Sets up trace for the application
mbed_official 0:7037ed05f54f 46 * Wouldn't do anything if the FEATURE_COMMON_PAL is not added
mbed_official 0:7037ed05f54f 47 * or if the trace is disabled using mbed_app.json
mbed_official 0:7037ed05f54f 48 */
mbed_official 0:7037ed05f54f 49 void setup_trace()
mbed_official 0:7037ed05f54f 50 {
mbed_official 0:7037ed05f54f 51 // setting up Mbed trace.
mbed_official 0:7037ed05f54f 52 mbed_trace_mutex_wait_function_set(serial_lock);
mbed_official 0:7037ed05f54f 53 mbed_trace_mutex_release_function_set(serial_unlock);
mbed_official 0:7037ed05f54f 54 mbed_trace_init();
mbed_official 0:7037ed05f54f 55 mbed_trace_print_function_set(trace_printer);
mbed_official 0:7037ed05f54f 56 }
mbed_official 0:7037ed05f54f 57
mbed_official 0:7037ed05f54f 58 /**
mbed_official 0:7037ed05f54f 59 * Lock provided for serial printing used by trace library
mbed_official 0:7037ed05f54f 60 */
mbed_official 0:7037ed05f54f 61 static void serial_lock()
mbed_official 0:7037ed05f54f 62 {
mbed_official 0:7037ed05f54f 63 mutex.lock();
mbed_official 0:7037ed05f54f 64 }
mbed_official 0:7037ed05f54f 65
mbed_official 0:7037ed05f54f 66 /**
mbed_official 0:7037ed05f54f 67 * Releasing lock provided for serial printing used by trace library
mbed_official 0:7037ed05f54f 68 */
mbed_official 0:7037ed05f54f 69 static void serial_unlock()
mbed_official 0:7037ed05f54f 70 {
mbed_official 0:7037ed05f54f 71 mutex.unlock();
mbed_official 0:7037ed05f54f 72 }
mbed_official 0:7037ed05f54f 73
mbed_official 0:7037ed05f54f 74 /**
mbed_official 0:7037ed05f54f 75 * Prints the Mbed trace, used by trace library.
mbed_official 0:7037ed05f54f 76 * Not intended for local use.
mbed_official 0:7037ed05f54f 77 */
mbed_official 0:7037ed05f54f 78 static void trace_printer(const char* str)
mbed_official 0:7037ed05f54f 79 {
mbed_official 8:7594ad70d2bf 80 pc.printf("%s\r\n", str);
mbed_official 0:7037ed05f54f 81 }
mbed_official 0:7037ed05f54f 82
mbed_official 0:7037ed05f54f 83 #else
mbed_official 0:7037ed05f54f 84
mbed_official 0:7037ed05f54f 85 void setup_trace()
mbed_official 0:7037ed05f54f 86 {
mbed_official 0:7037ed05f54f 87 }
mbed_official 0:7037ed05f54f 88
mbed_official 0:7037ed05f54f 89 #endif
mbed_official 0:7037ed05f54f 90