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/BusOut.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_BUSOUT_H
mega64 146:03e976389d16 17 #define MBED_BUSOUT_H
mega64 146:03e976389d16 18
mega64 146:03e976389d16 19 #include "drivers/DigitalOut.h"
mega64 146:03e976389d16 20 #include "platform/PlatformMutex.h"
mega64 146:03e976389d16 21
mega64 146:03e976389d16 22 namespace mbed {
mega64 146:03e976389d16 23 /** \addtogroup drivers */
mega64 146:03e976389d16 24 /** @{*/
mega64 146:03e976389d16 25
mega64 146:03e976389d16 26 /** A digital output bus, used for setting the state of a collection of pins
mega64 146:03e976389d16 27 */
mega64 146:03e976389d16 28 class BusOut {
mega64 146:03e976389d16 29
mega64 146:03e976389d16 30 public:
mega64 146:03e976389d16 31
mega64 146:03e976389d16 32 /** Create an BusOut, connected to the specified pins
mega64 146:03e976389d16 33 *
mega64 146:03e976389d16 34 * @param p<n> DigitalOut pin to connect to bus bit <n> (p5-p30, NC)
mega64 146:03e976389d16 35 *
mega64 146:03e976389d16 36 * @Note Synchronization level: Thread safe
mega64 146:03e976389d16 37 *
mega64 146:03e976389d16 38 * @note
mega64 146:03e976389d16 39 * It is only required to specify as many pin variables as is required
mega64 146:03e976389d16 40 * for the bus; the rest will default to NC (not connected)
mega64 146:03e976389d16 41 */
mega64 146:03e976389d16 42 BusOut(PinName p0, PinName p1 = NC, PinName p2 = NC, PinName p3 = NC,
mega64 146:03e976389d16 43 PinName p4 = NC, PinName p5 = NC, PinName p6 = NC, PinName p7 = NC,
mega64 146:03e976389d16 44 PinName p8 = NC, PinName p9 = NC, PinName p10 = NC, PinName p11 = NC,
mega64 146:03e976389d16 45 PinName p12 = NC, PinName p13 = NC, PinName p14 = NC, PinName p15 = NC);
mega64 146:03e976389d16 46
mega64 146:03e976389d16 47 BusOut(PinName pins[16]);
mega64 146:03e976389d16 48
mega64 146:03e976389d16 49 virtual ~BusOut();
mega64 146:03e976389d16 50
mega64 146:03e976389d16 51 /** Write the value to the output bus
mega64 146:03e976389d16 52 *
mega64 146:03e976389d16 53 * @param value An integer specifying a bit to write for every corresponding DigitalOut pin
mega64 146:03e976389d16 54 */
mega64 146:03e976389d16 55 void write(int value);
mega64 146:03e976389d16 56
mega64 146:03e976389d16 57 /** Read the value currently output on the bus
mega64 146:03e976389d16 58 *
mega64 146:03e976389d16 59 * @returns
mega64 146:03e976389d16 60 * An integer with each bit corresponding to associated DigitalOut pin setting
mega64 146:03e976389d16 61 */
mega64 146:03e976389d16 62 int read();
mega64 146:03e976389d16 63
mega64 146:03e976389d16 64 /** Binary mask of bus pins connected to actual pins (not NC pins)
mega64 146:03e976389d16 65 * 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 66 *
mega64 146:03e976389d16 67 * @returns
mega64 146:03e976389d16 68 * Binary mask of connected pins
mega64 146:03e976389d16 69 */
mega64 146:03e976389d16 70 int mask() {
mega64 146:03e976389d16 71 // No lock needed since _nc_mask is not modified outside the constructor
mega64 146:03e976389d16 72 return _nc_mask;
mega64 146:03e976389d16 73 }
mega64 146:03e976389d16 74
mega64 146:03e976389d16 75 /** A shorthand for write()
mega64 146:03e976389d16 76 */
mega64 146:03e976389d16 77 BusOut& operator= (int v);
mega64 146:03e976389d16 78 BusOut& operator= (BusOut& rhs);
mega64 146:03e976389d16 79
mega64 146:03e976389d16 80 /** Access to particular bit in random-iterator fashion
mega64 146:03e976389d16 81 */
mega64 146:03e976389d16 82 DigitalOut& operator[] (int index);
mega64 146:03e976389d16 83
mega64 146:03e976389d16 84 /** A shorthand for read()
mega64 146:03e976389d16 85 */
mega64 146:03e976389d16 86 operator int();
mega64 146:03e976389d16 87
mega64 146:03e976389d16 88 protected:
mega64 146:03e976389d16 89 virtual void lock();
mega64 146:03e976389d16 90 virtual void unlock();
mega64 146:03e976389d16 91 DigitalOut* _pin[16];
mega64 146:03e976389d16 92
mega64 146:03e976389d16 93 /** Mask of bus's NC pins
mega64 146:03e976389d16 94 * If bit[n] is set to 1 - pin is connected
mega64 146:03e976389d16 95 * if bit[n] is cleared - pin is not connected (NC)
mega64 146:03e976389d16 96 */
mega64 146:03e976389d16 97 int _nc_mask;
mega64 146:03e976389d16 98
mega64 146:03e976389d16 99 PlatformMutex _mutex;
mega64 146:03e976389d16 100
mega64 146:03e976389d16 101 /* disallow copy constructor and assignment operators */
mega64 146:03e976389d16 102 private:
mega64 146:03e976389d16 103 BusOut(const BusOut&);
mega64 146:03e976389d16 104 BusOut & operator = (const BusOut&);
mega64 146:03e976389d16 105 };
mega64 146:03e976389d16 106
mega64 146:03e976389d16 107 } // namespace mbed
mega64 146:03e976389d16 108
mega64 146:03e976389d16 109 #endif
mega64 146:03e976389d16 110
mega64 146:03e976389d16 111 /** @}*/