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)

drivers/FileSystemLike.cpp@148:8b0b02bf146f, 2017-04-27 (annotated)

Committer:
mega64
Date:
Thu Apr 27 23:56:38 2017 +0000
Revision:
148:8b0b02bf146f
Parent:
146:03e976389d16 
Remove unnecessary folders

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mega64 146:03e976389d16 1 /* mbed Microcontroller Library
mega64 146:03e976389d16 2 * Copyright (c) 2006-2013 ARM Limited
mega64 146:03e976389d16 3 *
mega64 146:03e976389d16 4 * Licensed under the Apache License, Version 2.0 (the "License");
mega64 146:03e976389d16 5 * you may not use this file except in compliance with the License.
mega64 146:03e976389d16 6 * You may obtain a copy of the License at
mega64 146:03e976389d16 7 *
mega64 146:03e976389d16 8 * http://www.apache.org/licenses/LICENSE-2.0
mega64 146:03e976389d16 9 *
mega64 146:03e976389d16 10 * Unless required by applicable law or agreed to in writing, software
mega64 146:03e976389d16 11 * distributed under the License is distributed on an "AS IS" BASIS,
mega64 146:03e976389d16 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
mega64 146:03e976389d16 13 * See the License for the specific language governing permissions and
mega64 146:03e976389d16 14 * limitations under the License.
mega64 146:03e976389d16 15 */
mega64 146:03e976389d16 16 #include "drivers/FileSystemLike.h"
mega64 146:03e976389d16 17
mega64 146:03e976389d16 18 namespace mbed {
mega64 146:03e976389d16 19
mega64 146:03e976389d16 20 class BaseDirHandle : public DirHandle {
mega64 146:03e976389d16 21 public:
mega64 146:03e976389d16 22 /*
mega64 146:03e976389d16 23 We keep track of our current location as the n'th object in the
mega64 146:03e976389d16 24 FileSystemLike list. Using a Base* instead would cause problems if that
mega64 146:03e976389d16 25 object were to be destroyed between readdirs.
mega64 146:03e976389d16 26 Using this method does mean though that destroying/creating objects can
mega64 146:03e976389d16 27 give unusual results from readdir.
mega64 146:03e976389d16 28 */
mega64 146:03e976389d16 29 off_t n;
mega64 146:03e976389d16 30 struct dirent cur_entry;
mega64 146:03e976389d16 31
mega64 146:03e976389d16 32 BaseDirHandle() : DirHandle(0), n(0), cur_entry() {
mega64 146:03e976389d16 33 }
mega64 146:03e976389d16 34
mega64 146:03e976389d16 35 virtual int closedir() {
mega64 146:03e976389d16 36 // No lock can be used in destructor
mega64 146:03e976389d16 37 delete this;
mega64 146:03e976389d16 38 return 0;
mega64 146:03e976389d16 39 }
mega64 146:03e976389d16 40
mega64 146:03e976389d16 41 virtual struct dirent *readdir() {
mega64 146:03e976389d16 42 lock();
mega64 146:03e976389d16 43 FileBase *ptr = FileBase::get(n);
mega64 146:03e976389d16 44 if (ptr == NULL) {
mega64 146:03e976389d16 45 unlock();
mega64 146:03e976389d16 46 return NULL;
mega64 146:03e976389d16 47 }
mega64 146:03e976389d16 48
mega64 146:03e976389d16 49 /* Increment n, so next readdir gets the next item */
mega64 146:03e976389d16 50 n++;
mega64 146:03e976389d16 51
mega64 146:03e976389d16 52 /* Setup cur entry and return a pointer to it */
mega64 146:03e976389d16 53 std::strncpy(cur_entry.d_name, ptr->getName(), NAME_MAX);
mega64 146:03e976389d16 54 unlock();
mega64 146:03e976389d16 55 return &cur_entry;
mega64 146:03e976389d16 56 }
mega64 146:03e976389d16 57
mega64 146:03e976389d16 58 virtual off_t telldir() {
mega64 146:03e976389d16 59 lock();
mega64 146:03e976389d16 60 off_t offset = n;
mega64 146:03e976389d16 61 unlock();
mega64 146:03e976389d16 62 return offset;
mega64 146:03e976389d16 63 }
mega64 146:03e976389d16 64
mega64 146:03e976389d16 65 virtual void seekdir(off_t offset) {
mega64 146:03e976389d16 66 lock();
mega64 146:03e976389d16 67 n = offset;
mega64 146:03e976389d16 68 unlock();
mega64 146:03e976389d16 69 }
mega64 146:03e976389d16 70
mega64 146:03e976389d16 71 virtual void rewinddir() {
mega64 146:03e976389d16 72 lock();
mega64 146:03e976389d16 73 n = 0;
mega64 146:03e976389d16 74 unlock();
mega64 146:03e976389d16 75 }
mega64 146:03e976389d16 76
mega64 146:03e976389d16 77 protected:
mega64 146:03e976389d16 78 PlatformMutex _mutex;
mega64 146:03e976389d16 79
mega64 146:03e976389d16 80 virtual void lock() {
mega64 146:03e976389d16 81 _mutex.lock();
mega64 146:03e976389d16 82 }
mega64 146:03e976389d16 83
mega64 146:03e976389d16 84 virtual void unlock() {
mega64 146:03e976389d16 85 _mutex.unlock();
mega64 146:03e976389d16 86 }
mega64 146:03e976389d16 87 };
mega64 146:03e976389d16 88
mega64 146:03e976389d16 89 FileSystemLike::FileSystemLike(const char *name) : FileBase(name, FileSystemPathType) {
mega64 146:03e976389d16 90
mega64 146:03e976389d16 91 }
mega64 146:03e976389d16 92
mega64 146:03e976389d16 93 FileSystemLike::~FileSystemLike() {
mega64 146:03e976389d16 94
mega64 146:03e976389d16 95 }
mega64 146:03e976389d16 96
mega64 146:03e976389d16 97 DirHandle *FileSystemLike::opendir() {
mega64 146:03e976389d16 98 return new BaseDirHandle();
mega64 146:03e976389d16 99 }
mega64 146:03e976389d16 100
mega64 146:03e976389d16 101 } // namespace mbed