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/CircularBuffer.h@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) 2015 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 #ifndef MBED_CIRCULARBUFFER_H
mega64 146:03e976389d16 17 #define MBED_CIRCULARBUFFER_H
mega64 146:03e976389d16 18
mega64 146:03e976389d16 19 #include "platform/mbed_critical.h"
mega64 146:03e976389d16 20
mega64 146:03e976389d16 21 namespace mbed {
mega64 146:03e976389d16 22 /** \addtogroup platform */
mega64 146:03e976389d16 23 /** @{*/
mega64 146:03e976389d16 24
mega64 146:03e976389d16 25 /** Templated Circular buffer class
mega64 146:03e976389d16 26 *
mega64 146:03e976389d16 27 * @Note Synchronization level: Interrupt safe
mega64 146:03e976389d16 28 */
mega64 146:03e976389d16 29 template<typename T, uint32_t BufferSize, typename CounterType = uint32_t>
mega64 146:03e976389d16 30 class CircularBuffer {
mega64 146:03e976389d16 31 public:
mega64 146:03e976389d16 32 CircularBuffer() : _head(0), _tail(0), _full(false) {
mega64 146:03e976389d16 33 }
mega64 146:03e976389d16 34
mega64 146:03e976389d16 35 ~CircularBuffer() {
mega64 146:03e976389d16 36 }
mega64 146:03e976389d16 37
mega64 146:03e976389d16 38 /** Push the transaction to the buffer. This overwrites the buffer if it's
mega64 146:03e976389d16 39 * full
mega64 146:03e976389d16 40 *
mega64 146:03e976389d16 41 * @param data Data to be pushed to the buffer
mega64 146:03e976389d16 42 */
mega64 146:03e976389d16 43 void push(const T& data) {
mega64 146:03e976389d16 44 core_util_critical_section_enter();
mega64 146:03e976389d16 45 if (full()) {
mega64 146:03e976389d16 46 _tail++;
mega64 146:03e976389d16 47 _tail %= BufferSize;
mega64 146:03e976389d16 48 }
mega64 146:03e976389d16 49 _pool[_head++] = data;
mega64 146:03e976389d16 50 _head %= BufferSize;
mega64 146:03e976389d16 51 if (_head == _tail) {
mega64 146:03e976389d16 52 _full = true;
mega64 146:03e976389d16 53 }
mega64 146:03e976389d16 54 core_util_critical_section_exit();
mega64 146:03e976389d16 55 }
mega64 146:03e976389d16 56
mega64 146:03e976389d16 57 /** Pop the transaction from the buffer
mega64 146:03e976389d16 58 *
mega64 146:03e976389d16 59 * @param data Data to be pushed to the buffer
mega64 146:03e976389d16 60 * @return True if the buffer is not empty and data contains a transaction, false otherwise
mega64 146:03e976389d16 61 */
mega64 146:03e976389d16 62 bool pop(T& data) {
mega64 146:03e976389d16 63 bool data_popped = false;
mega64 146:03e976389d16 64 core_util_critical_section_enter();
mega64 146:03e976389d16 65 if (!empty()) {
mega64 146:03e976389d16 66 data = _pool[_tail++];
mega64 146:03e976389d16 67 _tail %= BufferSize;
mega64 146:03e976389d16 68 _full = false;
mega64 146:03e976389d16 69 data_popped = true;
mega64 146:03e976389d16 70 }
mega64 146:03e976389d16 71 core_util_critical_section_exit();
mega64 146:03e976389d16 72 return data_popped;
mega64 146:03e976389d16 73 }
mega64 146:03e976389d16 74
mega64 146:03e976389d16 75 /** Check if the buffer is empty
mega64 146:03e976389d16 76 *
mega64 146:03e976389d16 77 * @return True if the buffer is empty, false if not
mega64 146:03e976389d16 78 */
mega64 146:03e976389d16 79 bool empty() {
mega64 146:03e976389d16 80 core_util_critical_section_enter();
mega64 146:03e976389d16 81 bool is_empty = (_head == _tail) && !_full;
mega64 146:03e976389d16 82 core_util_critical_section_exit();
mega64 146:03e976389d16 83 return is_empty;
mega64 146:03e976389d16 84 }
mega64 146:03e976389d16 85
mega64 146:03e976389d16 86 /** Check if the buffer is full
mega64 146:03e976389d16 87 *
mega64 146:03e976389d16 88 * @return True if the buffer is full, false if not
mega64 146:03e976389d16 89 */
mega64 146:03e976389d16 90 bool full() {
mega64 146:03e976389d16 91 core_util_critical_section_enter();
mega64 146:03e976389d16 92 bool full = _full;
mega64 146:03e976389d16 93 core_util_critical_section_exit();
mega64 146:03e976389d16 94 return full;
mega64 146:03e976389d16 95 }
mega64 146:03e976389d16 96
mega64 146:03e976389d16 97 /** Reset the buffer
mega64 146:03e976389d16 98 *
mega64 146:03e976389d16 99 */
mega64 146:03e976389d16 100 void reset() {
mega64 146:03e976389d16 101 core_util_critical_section_enter();
mega64 146:03e976389d16 102 _head = 0;
mega64 146:03e976389d16 103 _tail = 0;
mega64 146:03e976389d16 104 _full = false;
mega64 146:03e976389d16 105 core_util_critical_section_exit();
mega64 146:03e976389d16 106 }
mega64 146:03e976389d16 107
mega64 146:03e976389d16 108 private:
mega64 146:03e976389d16 109 T _pool[BufferSize];
mega64 146:03e976389d16 110 volatile CounterType _head;
mega64 146:03e976389d16 111 volatile CounterType _tail;
mega64 146:03e976389d16 112 volatile bool _full;
mega64 146:03e976389d16 113 };
mega64 146:03e976389d16 114
mega64 146:03e976389d16 115 }
mega64 146:03e976389d16 116
mega64 146:03e976389d16 117 #endif
mega64 146:03e976389d16 118
mega64 146:03e976389d16 119 /** @}*/