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/InterruptManager.cpp@146:03e976389d16, 2017-03-16 (annotated)

Committer:
mega64
Date:
Thu Mar 16 06:15:53 2017 +0000
Revision:
146:03e976389d16
fully rebuild, now based on mbed-dev v160

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 "cmsis.h"
mega64 146:03e976389d16 17 #if defined(NVIC_NUM_VECTORS)
mega64 146:03e976389d16 18
mega64 146:03e976389d16 19 #include "drivers/InterruptManager.h"
mega64 146:03e976389d16 20 #include "platform/mbed_critical.h"
mega64 146:03e976389d16 21 #include <string.h>
mega64 146:03e976389d16 22
mega64 146:03e976389d16 23 #define CHAIN_INITIAL_SIZE 4
mega64 146:03e976389d16 24
mega64 146:03e976389d16 25 namespace mbed {
mega64 146:03e976389d16 26
mega64 146:03e976389d16 27 typedef void (*pvoidf)(void);
mega64 146:03e976389d16 28
mega64 146:03e976389d16 29 InterruptManager* InterruptManager::_instance = (InterruptManager*)NULL;
mega64 146:03e976389d16 30
mega64 146:03e976389d16 31 InterruptManager* InterruptManager::get() {
mega64 146:03e976389d16 32
mega64 146:03e976389d16 33 if (NULL == _instance) {
mega64 146:03e976389d16 34 InterruptManager* temp = new InterruptManager();
mega64 146:03e976389d16 35
mega64 146:03e976389d16 36 // Atomically set _instance
mega64 146:03e976389d16 37 core_util_critical_section_enter();
mega64 146:03e976389d16 38 if (NULL == _instance) {
mega64 146:03e976389d16 39 _instance = temp;
mega64 146:03e976389d16 40 }
mega64 146:03e976389d16 41 core_util_critical_section_exit();
mega64 146:03e976389d16 42
mega64 146:03e976389d16 43 // Another thread got there first so delete ours
mega64 146:03e976389d16 44 if (temp != _instance) {
mega64 146:03e976389d16 45 delete temp;
mega64 146:03e976389d16 46 }
mega64 146:03e976389d16 47
mega64 146:03e976389d16 48 }
mega64 146:03e976389d16 49 return _instance;
mega64 146:03e976389d16 50 }
mega64 146:03e976389d16 51
mega64 146:03e976389d16 52 InterruptManager::InterruptManager() {
mega64 146:03e976389d16 53 // No mutex needed in constructor
mega64 146:03e976389d16 54 memset(_chains, 0, NVIC_NUM_VECTORS * sizeof(CallChain*));
mega64 146:03e976389d16 55 }
mega64 146:03e976389d16 56
mega64 146:03e976389d16 57 void InterruptManager::destroy() {
mega64 146:03e976389d16 58 // Not a good idea to call this unless NO interrupt at all
mega64 146:03e976389d16 59 // is under the control of the handler; otherwise, a system crash
mega64 146:03e976389d16 60 // is very likely to occur
mega64 146:03e976389d16 61 if (NULL != _instance) {
mega64 146:03e976389d16 62 delete _instance;
mega64 146:03e976389d16 63 _instance = (InterruptManager*)NULL;
mega64 146:03e976389d16 64 }
mega64 146:03e976389d16 65 }
mega64 146:03e976389d16 66
mega64 146:03e976389d16 67 InterruptManager::~InterruptManager() {
mega64 146:03e976389d16 68 for(int i = 0; i < NVIC_NUM_VECTORS; i++)
mega64 146:03e976389d16 69 if (NULL != _chains[i])
mega64 146:03e976389d16 70 delete _chains[i];
mega64 146:03e976389d16 71 }
mega64 146:03e976389d16 72
mega64 146:03e976389d16 73 bool InterruptManager::must_replace_vector(IRQn_Type irq) {
mega64 146:03e976389d16 74 lock();
mega64 146:03e976389d16 75
mega64 146:03e976389d16 76 int ret = false;
mega64 146:03e976389d16 77 int irq_pos = get_irq_index(irq);
mega64 146:03e976389d16 78 if (NULL == _chains[irq_pos]) {
mega64 146:03e976389d16 79 _chains[irq_pos] = new CallChain(CHAIN_INITIAL_SIZE);
mega64 146:03e976389d16 80 _chains[irq_pos]->add((pvoidf)NVIC_GetVector(irq));
mega64 146:03e976389d16 81 ret = true;
mega64 146:03e976389d16 82 }
mega64 146:03e976389d16 83 unlock();
mega64 146:03e976389d16 84 return ret;
mega64 146:03e976389d16 85 }
mega64 146:03e976389d16 86
mega64 146:03e976389d16 87 pFunctionPointer_t InterruptManager::add_common(void (*function)(void), IRQn_Type irq, bool front) {
mega64 146:03e976389d16 88 lock();
mega64 146:03e976389d16 89 int irq_pos = get_irq_index(irq);
mega64 146:03e976389d16 90 bool change = must_replace_vector(irq);
mega64 146:03e976389d16 91
mega64 146:03e976389d16 92 pFunctionPointer_t pf = front ? _chains[irq_pos]->add_front(function) : _chains[irq_pos]->add(function);
mega64 146:03e976389d16 93 if (change)
mega64 146:03e976389d16 94 NVIC_SetVector(irq, (uint32_t)&InterruptManager::static_irq_helper);
mega64 146:03e976389d16 95 unlock();
mega64 146:03e976389d16 96 return pf;
mega64 146:03e976389d16 97 }
mega64 146:03e976389d16 98
mega64 146:03e976389d16 99 bool InterruptManager::remove_handler(pFunctionPointer_t handler, IRQn_Type irq) {
mega64 146:03e976389d16 100 int irq_pos = get_irq_index(irq);
mega64 146:03e976389d16 101 bool ret = false;
mega64 146:03e976389d16 102
mega64 146:03e976389d16 103 lock();
mega64 146:03e976389d16 104 if (_chains[irq_pos] != NULL) {
mega64 146:03e976389d16 105 if (_chains[irq_pos]->remove(handler)) {
mega64 146:03e976389d16 106 ret = true;
mega64 146:03e976389d16 107 }
mega64 146:03e976389d16 108 }
mega64 146:03e976389d16 109 unlock();
mega64 146:03e976389d16 110
mega64 146:03e976389d16 111 return ret;
mega64 146:03e976389d16 112 }
mega64 146:03e976389d16 113
mega64 146:03e976389d16 114 void InterruptManager::irq_helper() {
mega64 146:03e976389d16 115 _chains[__get_IPSR()]->call();
mega64 146:03e976389d16 116 }
mega64 146:03e976389d16 117
mega64 146:03e976389d16 118 int InterruptManager::get_irq_index(IRQn_Type irq) {
mega64 146:03e976389d16 119 // Pure function - no lock needed
mega64 146:03e976389d16 120 return (int)irq + NVIC_USER_IRQ_OFFSET;
mega64 146:03e976389d16 121 }
mega64 146:03e976389d16 122
mega64 146:03e976389d16 123 void InterruptManager::static_irq_helper() {
mega64 146:03e976389d16 124 InterruptManager::get()->irq_helper();
mega64 146:03e976389d16 125 }
mega64 146:03e976389d16 126
mega64 146:03e976389d16 127 void InterruptManager::lock() {
mega64 146:03e976389d16 128 _mutex.lock();
mega64 146:03e976389d16 129 }
mega64 146:03e976389d16 130
mega64 146:03e976389d16 131 void InterruptManager::unlock() {
mega64 146:03e976389d16 132 _mutex.unlock();
mega64 146:03e976389d16 133 }
mega64 146:03e976389d16 134
mega64 146:03e976389d16 135 } // namespace mbed
mega64 146:03e976389d16 136
mega64 146:03e976389d16 137 #endif