Nothing Special / mbed-STM32F103C8

Modification of Mbed-dev library for LQFP48 package microcontrollers: STM32F103C8 (STM32F103C8T6) and STM32F103CB (STM32F103CBT6) (Bluepill boards, Maple mini etc. )

Fork of mbed-STM32F103C8_org by Nothing Special

Library for STM32F103C8 (Bluepill boards etc.).
Use this instead of mbed library.
This library allows the size of the code in the FLASH up to 128kB. Therefore, code also runs on microcontrollers STM32F103CB (eg. Maple mini).
But in the case of STM32F103C8, check the size of the resulting code would not exceed 64kB.

To compile a program with this library, use NUCLEO-F103RB as the target name. !

Changes:

  • Corrected initialization of the HSE + crystal clock (mbed permanent bug), allowing the use of on-board xtal (8MHz).(1)
  • Additionally, it also set USB clock (48Mhz).(2)
  • Definitions of pins and peripherals adjusted to LQFP48 case.
  • Board led LED1 is now PC_13 (3)
  • USER_BUTTON is now PC_14 (4)

    Now the library is complete rebuilt based on mbed-dev v160 (and not yet fully tested).

notes
(1) - In case 8MHz xtal on board, CPU frequency is 72MHz. Without xtal is 64MHz.
(2) - Using the USB interface is only possible if STM32 is clocking by on-board 8MHz xtal or external clock signal 8MHz on the OSC_IN pin.
(3) - On Bluepill board led operation is reversed, i.e. 0 - led on, 1 - led off.
(4) - Bluepill board has no real user button

Information

After export to SW4STM (AC6):

  • add line #include "mbed_config.h" in files Serial.h and RawSerial.h
  • in project properties change Optimisation Level to Optimise for size (-Os)

platform/mbed_alloc_wrappers.cpp

Committer:
mega64
Date:
2017-04-27
Revision:
148:8b0b02bf146f
Parent:
146:03e976389d16

File content as of revision 148:8b0b02bf146f:

/* mbed Microcontroller Library
 * Copyright (c) 2006-2016 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 "platform/mbed_mem_trace.h"
#include "platform/mbed_stats.h"
#include "platform/mbed_toolchain.h"
#include "platform/SingletonPtr.h"
#include "platform/PlatformMutex.h"
#include <stddef.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>

/* There are two memory tracers in mbed OS:

- the first can be used to detect the maximum heap usage at runtime. It is
  activated by defining the MBED_HEAP_STATS_ENABLED macro.
- the second can be used to trace each memory call by automatically invoking
  a callback on each memory operation (see hal/api/mbed_mem_trace.h). It is
  activated by defining the MBED_MEM_TRACING_ENABLED macro.

Both tracers can be activated and deactivated in any combination. If both tracers
are active, the second one (MBED_MEM_TRACING_ENABLED) will trace the first one's
(MBED_HEAP_STATS_ENABLED) memory calls.*/

/******************************************************************************/
/* Implementation of the runtime max heap usage checker                       */
/******************************************************************************/

/* Size must be a multiple of 8 to keep alignment */
typedef struct {
    uint32_t size;
    uint32_t pad;
} alloc_info_t;

#ifdef MBED_MEM_TRACING_ENABLED
static SingletonPtr<PlatformMutex> mem_trace_mutex;
#endif
#ifdef MBED_HEAP_STATS_ENABLED
static SingletonPtr<PlatformMutex> malloc_stats_mutex;
static mbed_stats_heap_t heap_stats = {0, 0, 0, 0, 0};
#endif

void mbed_stats_heap_get(mbed_stats_heap_t *stats)
{
#ifdef MBED_HEAP_STATS_ENABLED
    extern uint32_t mbed_heap_size;
    heap_stats.reserved_size = mbed_heap_size;

    malloc_stats_mutex->lock();
    memcpy(stats, &heap_stats, sizeof(mbed_stats_heap_t));
    malloc_stats_mutex->unlock();
#else
    memset(stats, 0, sizeof(mbed_stats_heap_t));
#endif
}

/******************************************************************************/
/* GCC memory allocation wrappers                                             */
/******************************************************************************/

#if defined(TOOLCHAIN_GCC)

#ifdef   FEATURE_UVISOR
#include "uvisor-lib/uvisor-lib.h"
#endif/* FEATURE_UVISOR */

extern "C" {
    void * __real__malloc_r(struct _reent * r, size_t size);
    void * __real__realloc_r(struct _reent * r, void * ptr, size_t size);
    void __real__free_r(struct _reent * r, void * ptr);
    void* __real__calloc_r(struct _reent * r, size_t nmemb, size_t size);
}

// TODO: memory tracing doesn't work with uVisor enabled.
#if !defined(FEATURE_UVISOR)

extern "C" void * __wrap__malloc_r(struct _reent * r, size_t size) {
    void *ptr = NULL;
#ifdef MBED_HEAP_STATS_ENABLED
    malloc_stats_mutex->lock();
    alloc_info_t *alloc_info = (alloc_info_t*)__real__malloc_r(r, size + sizeof(alloc_info_t));
    if (alloc_info != NULL) {
        alloc_info->size = size;
        ptr = (void*)(alloc_info + 1);
        heap_stats.current_size += size;
        heap_stats.total_size += size;
        heap_stats.alloc_cnt += 1;
        if (heap_stats.current_size > heap_stats.max_size) {
            heap_stats.max_size = heap_stats.current_size;
        }
    } else {
        heap_stats.alloc_fail_cnt += 1;
    }
    malloc_stats_mutex->unlock();
#else // #ifdef MBED_HEAP_STATS_ENABLED
    ptr = __real__malloc_r(r, size);
#endif // #ifdef MBED_HEAP_STATS_ENABLED
#ifdef MBED_MEM_TRACING_ENABLED
    mem_trace_mutex->lock();
    mbed_mem_trace_malloc(ptr, size, MBED_CALLER_ADDR());
    mem_trace_mutex->unlock();
#endif // #ifdef MBED_MEM_TRACING_ENABLED
    return ptr;
}

extern "C" void * __wrap__realloc_r(struct _reent * r, void * ptr, size_t size) {
    void *new_ptr = NULL;
#ifdef MBED_HEAP_STATS_ENABLED
    // Implement realloc_r with malloc and free.
    // The function realloc_r can't be used here directly since
    // it can call into __wrap__malloc_r (returns ptr + 4) or
    // resize memory directly (returns ptr + 0).

    // Note - no lock needed since malloc and free are thread safe

    // Get old size
    uint32_t old_size = 0;
    if (ptr != NULL) {
        alloc_info_t *alloc_info = ((alloc_info_t*)ptr) - 1;
        old_size = alloc_info->size;
    }

    // Allocate space
    if (size != 0) {
        new_ptr = malloc(size);
    }

    // If the new buffer has been allocated copy the data to it
    // and free the old buffer
    if (new_ptr != NULL) {
        uint32_t copy_size = (old_size < size) ? old_size : size;
        memcpy(new_ptr, (void*)ptr, copy_size);
        free(ptr);
    }
#else // #ifdef MBED_HEAP_STATS_ENABLED
    new_ptr = __real__realloc_r(r, ptr, size);
#endif // #ifdef MBED_HEAP_STATS_ENABLED
#ifdef MBED_MEM_TRACING_ENABLED
    mem_trace_mutex->lock();
    mbed_mem_trace_realloc(new_ptr, ptr, size, MBED_CALLER_ADDR());
    mem_trace_mutex->unlock();
#endif // #ifdef MBED_MEM_TRACING_ENABLED
    return new_ptr;
}

extern "C" void __wrap__free_r(struct _reent * r, void * ptr) {
#ifdef MBED_HEAP_STATS_ENABLED
    malloc_stats_mutex->lock();
    alloc_info_t *alloc_info = NULL;
    if (ptr != NULL) {
        alloc_info = ((alloc_info_t*)ptr) - 1;
        heap_stats.current_size -= alloc_info->size;
        heap_stats.alloc_cnt -= 1;
    }
    __real__free_r(r, (void*)alloc_info);
    malloc_stats_mutex->unlock();
#else // #ifdef MBED_HEAP_STATS_ENABLED
    __real__free_r(r, ptr);
#endif // #ifdef MBED_HEAP_STATS_ENABLED
#ifdef MBED_MEM_TRACING_ENABLED
    mem_trace_mutex->lock();
    mbed_mem_trace_free(ptr, MBED_CALLER_ADDR());
    mem_trace_mutex->unlock();
#endif // #ifdef MBED_MEM_TRACING_ENABLED
}

#endif // if !defined(FEATURE_UVISOR)

extern "C" void * __wrap__calloc_r(struct _reent * r, size_t nmemb, size_t size) {
    void *ptr = NULL;
#ifdef MBED_HEAP_STATS_ENABLED
    // Note - no lock needed since malloc is thread safe

    ptr = malloc(nmemb * size);
    if (ptr != NULL) {
        memset(ptr, 0, nmemb * size);
    }
#else // #ifdef MBED_HEAP_STATS_ENABLED
    ptr = __real__calloc_r(r, nmemb, size);
#endif // #ifdef MBED_HEAP_STATS_ENABLED
#ifdef MBED_MEM_TRACING_ENABLED
    mem_trace_mutex->lock();
    mbed_mem_trace_calloc(ptr, nmemb, size, MBED_CALLER_ADDR());
    mem_trace_mutex->unlock();
#endif // #ifdef MBED_MEM_TRACING_ENABLED
    return ptr;
}


/******************************************************************************/
/* ARMCC memory allocation wrappers                                           */
/******************************************************************************/

#elif defined(TOOLCHAIN_ARM) // #if defined(TOOLCHAIN_GCC)

/* Enable hooking of memory function only if tracing is also enabled */
#if defined(MBED_MEM_TRACING_ENABLED) || defined(MBED_HEAP_STATS_ENABLED)

extern "C" {
    void *$Super$$malloc(size_t size);
    void *$Super$$realloc(void *ptr, size_t size);
    void *$Super$$calloc(size_t nmemb, size_t size);
    void $Super$$free(void *ptr);
}

extern "C" void* $Sub$$malloc(size_t size) {
    void *ptr = NULL;
#ifdef MBED_HEAP_STATS_ENABLED
    malloc_stats_mutex->lock();
    alloc_info_t *alloc_info = (alloc_info_t*)$Super$$malloc(size + sizeof(alloc_info_t));
    if (alloc_info != NULL) {
        alloc_info->size = size;
        ptr = (void*)(alloc_info + 1);
        heap_stats.current_size += size;
        heap_stats.total_size += size;
        heap_stats.alloc_cnt += 1;
        if (heap_stats.current_size > heap_stats.max_size) {
            heap_stats.max_size = heap_stats.current_size;
        }
    } else {
        heap_stats.alloc_fail_cnt += 1;
    }
    malloc_stats_mutex->unlock();
#else // #ifdef MBED_HEAP_STATS_ENABLED
    ptr = $Super$$malloc(size);
#endif // #ifdef MBED_HEAP_STATS_ENABLED
#ifdef MBED_MEM_TRACING_ENABLED
    mem_trace_mutex->lock();
    mbed_mem_trace_malloc(ptr, size, MBED_CALLER_ADDR());
    mem_trace_mutex->unlock();
#endif // #ifdef MBED_MEM_TRACING_ENABLED
    return ptr;
}

extern "C" void* $Sub$$realloc(void *ptr, size_t size) {
    void *new_ptr = NULL;
#ifdef MBED_HEAP_STATS_ENABLED
    // Note - no lock needed since malloc and free are thread safe

    // Get old size
    uint32_t old_size = 0;
    if (ptr != NULL) {
        alloc_info_t *alloc_info = ((alloc_info_t*)ptr) - 1;
        old_size = alloc_info->size;
    }

    // Allocate space
    if (size != 0) {
        new_ptr = malloc(size);
    }

    // If the new buffer has been allocated copy the data to it
    // and free the old buffer
    if (new_ptr != NULL) {
        uint32_t copy_size = (old_size < size) ? old_size : size;
        memcpy(new_ptr, (void*)ptr, copy_size);
        free(ptr);
    }
#else // #ifdef MBED_HEAP_STATS_ENABLED
    new_ptr = $Super$$realloc(ptr, size);
#endif // #ifdef MBED_HEAP_STATS_ENABLED
#ifdef MBED_MEM_TRACING_ENABLED
    mem_trace_mutex->lock();
    mbed_mem_trace_realloc(new_ptr, ptr, size, MBED_CALLER_ADDR());
    mem_trace_mutex->unlock();
#endif // #ifdef MBED_MEM_TRACING_ENABLED
    return new_ptr;
}

extern "C" void *$Sub$$calloc(size_t nmemb, size_t size) {
    void *ptr = NULL;
#ifdef MBED_HEAP_STATS_ENABLED
    // Note - no lock needed since malloc is thread safe
    ptr = malloc(nmemb * size);
    if (ptr != NULL) {
        memset(ptr, 0, nmemb * size);
    }
#else // #ifdef MBED_HEAP_STATS_ENABLED
    ptr = $Super$$calloc(nmemb, size);
#endif // #ifdef MBED_HEAP_STATS_ENABLED
#ifdef MBED_MEM_TRACING_ENABLED
    mem_trace_mutex->lock();
    mbed_mem_trace_calloc(ptr, nmemb, size, MBED_CALLER_ADDR());
    mem_trace_mutex->unlock();
#endif // #ifdef MBED_MEM_TRACING_ENABLED
    return ptr;
}

extern "C" void $Sub$$free(void *ptr) {
#ifdef MBED_HEAP_STATS_ENABLED
    malloc_stats_mutex->lock();
    alloc_info_t *alloc_info = NULL;
    if (ptr != NULL) {
        alloc_info = ((alloc_info_t*)ptr) - 1;
        heap_stats.current_size -= alloc_info->size;
        heap_stats.alloc_cnt -= 1;
    }
    $Super$$free((void*)alloc_info);
    malloc_stats_mutex->unlock();
#else // #ifdef MBED_HEAP_STATS_ENABLED
    $Super$$free(ptr);
#endif // #ifdef MBED_HEAP_STATS_ENABLED
#ifdef MBED_MEM_TRACING_ENABLED
    mem_trace_mutex->lock();
    mbed_mem_trace_free(ptr, MBED_CALLER_ADDR());
    mem_trace_mutex->unlock();
#endif // #ifdef MBED_MEM_TRACING_ENABLED
}

#endif // #if defined(MBED_MEM_TRACING_ENABLED) || defined(MBED_HEAP_STATS_ENABLED)

/******************************************************************************/
/* Allocation wrappers for other toolchains are not supported yet             */
/******************************************************************************/

#else // #if defined(TOOLCHAIN_GCC)

#ifdef MBED_MEM_TRACING_ENABLED
#warning Memory tracing is not supported with the current toolchain.
#endif

#ifdef MBED_HEAP_STATS_ENABLED
#warning Heap statistics are not supported with the current toolchain.
#endif

#endif // #if defined(TOOLCHAIN_GCC)