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/BusIn.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) 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 #ifndef MBED_BUSIN_H
mega64 146:03e976389d16 17 #define MBED_BUSIN_H
mega64 146:03e976389d16 18
mega64 146:03e976389d16 19 #include "platform/platform.h"
mega64 146:03e976389d16 20 #include "drivers/DigitalIn.h"
mega64 146:03e976389d16 21 #include "platform/PlatformMutex.h"
mega64 146:03e976389d16 22
mega64 146:03e976389d16 23 namespace mbed {
mega64 146:03e976389d16 24 /** \addtogroup drivers */
mega64 146:03e976389d16 25 /** @{*/
mega64 146:03e976389d16 26
mega64 146:03e976389d16 27 /** A digital input bus, used for reading the state of a collection of pins
mega64 146:03e976389d16 28 *
mega64 146:03e976389d16 29 * @Note Synchronization level: Thread safe
mega64 146:03e976389d16 30 */
mega64 146:03e976389d16 31 class BusIn {
mega64 146:03e976389d16 32
mega64 146:03e976389d16 33 public:
mega64 146:03e976389d16 34 /* Group: Configuration Methods */
mega64 146:03e976389d16 35
mega64 146:03e976389d16 36 /** Create an BusIn, connected to the specified pins
mega64 146:03e976389d16 37 *
mega64 146:03e976389d16 38 * @param <n> DigitalIn pin to connect to bus bit <n> (p5-p30, NC)
mega64 146:03e976389d16 39 *
mega64 146:03e976389d16 40 * @note
mega64 146:03e976389d16 41 * It is only required to specify as many pin variables as is required
mega64 146:03e976389d16 42 * for the bus; the rest will default to NC (not connected)
mega64 146:03e976389d16 43 */
mega64 146:03e976389d16 44 BusIn(PinName p0, PinName p1 = NC, PinName p2 = NC, PinName p3 = NC,
mega64 146:03e976389d16 45 PinName p4 = NC, PinName p5 = NC, PinName p6 = NC, PinName p7 = NC,
mega64 146:03e976389d16 46 PinName p8 = NC, PinName p9 = NC, PinName p10 = NC, PinName p11 = NC,
mega64 146:03e976389d16 47 PinName p12 = NC, PinName p13 = NC, PinName p14 = NC, PinName p15 = NC);
mega64 146:03e976389d16 48
mega64 146:03e976389d16 49 BusIn(PinName pins[16]);
mega64 146:03e976389d16 50
mega64 146:03e976389d16 51 virtual ~BusIn();
mega64 146:03e976389d16 52
mega64 146:03e976389d16 53 /** Read the value of the input bus
mega64 146:03e976389d16 54 *
mega64 146:03e976389d16 55 * @returns
mega64 146:03e976389d16 56 * An integer with each bit corresponding to the value read from the associated DigitalIn pin
mega64 146:03e976389d16 57 */
mega64 146:03e976389d16 58 int read();
mega64 146:03e976389d16 59
mega64 146:03e976389d16 60 /** Set the input pin mode
mega64 146:03e976389d16 61 *
mega64 146:03e976389d16 62 * @param mode PullUp, PullDown, PullNone
mega64 146:03e976389d16 63 */
mega64 146:03e976389d16 64 void mode(PinMode pull);
mega64 146:03e976389d16 65
mega64 146:03e976389d16 66 /** Binary mask of bus pins connected to actual pins (not NC pins)
mega64 146:03e976389d16 67 * If bus pin is in NC state make corresponding bit will be cleared (set to 0), else bit will be set to 1
mega64 146:03e976389d16 68 *
mega64 146:03e976389d16 69 * @returns
mega64 146:03e976389d16 70 * Binary mask of connected pins
mega64 146:03e976389d16 71 */
mega64 146:03e976389d16 72 int mask() {
mega64 146:03e976389d16 73 // No lock needed since _nc_mask is not modified outside the constructor
mega64 146:03e976389d16 74 return _nc_mask;
mega64 146:03e976389d16 75 }
mega64 146:03e976389d16 76
mega64 146:03e976389d16 77 /** A shorthand for read()
mega64 146:03e976389d16 78 */
mega64 146:03e976389d16 79 operator int();
mega64 146:03e976389d16 80
mega64 146:03e976389d16 81 /** Access to particular bit in random-iterator fashion
mega64 146:03e976389d16 82 */
mega64 146:03e976389d16 83 DigitalIn & operator[] (int index);
mega64 146:03e976389d16 84
mega64 146:03e976389d16 85 protected:
mega64 146:03e976389d16 86 DigitalIn* _pin[16];
mega64 146:03e976389d16 87
mega64 146:03e976389d16 88 /** Mask of bus's NC pins
mega64 146:03e976389d16 89 * If bit[n] is set to 1 - pin is connected
mega64 146:03e976389d16 90 * if bit[n] is cleared - pin is not connected (NC)
mega64 146:03e976389d16 91 */
mega64 146:03e976389d16 92 int _nc_mask;
mega64 146:03e976389d16 93
mega64 146:03e976389d16 94 PlatformMutex _mutex;
mega64 146:03e976389d16 95
mega64 146:03e976389d16 96 /* disallow copy constructor and assignment operators */
mega64 146:03e976389d16 97 private:
mega64 146:03e976389d16 98 virtual void lock();
mega64 146:03e976389d16 99 virtual void unlock();
mega64 146:03e976389d16 100 BusIn(const BusIn&);
mega64 146:03e976389d16 101 BusIn & operator = (const BusIn&);
mega64 146:03e976389d16 102 };
mega64 146:03e976389d16 103
mega64 146:03e976389d16 104 } // namespace mbed
mega64 146:03e976389d16 105
mega64 146:03e976389d16 106 #endif
mega64 146:03e976389d16 107
mega64 146:03e976389d16 108 /** @}*/