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/Serial.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_SERIAL_H
mega64 146:03e976389d16 17 #define MBED_SERIAL_H
mega64 146:03e976389d16 18
mega64 146:03e976389d16 19 #include "platform/platform.h"
mega64 146:03e976389d16 20
mega64 146:03e976389d16 21 #if DEVICE_SERIAL
mega64 146:03e976389d16 22
mega64 146:03e976389d16 23 #include "Stream.h"
mega64 146:03e976389d16 24 #include "SerialBase.h"
mega64 146:03e976389d16 25 #include "PlatformMutex.h"
mega64 146:03e976389d16 26 #include "serial_api.h"
mega64 146:03e976389d16 27
mega64 148:8b0b02bf146f 28
mega64 146:03e976389d16 29 namespace mbed {
mega64 146:03e976389d16 30 /** \addtogroup drivers */
mega64 146:03e976389d16 31 /** @{*/
mega64 146:03e976389d16 32
mega64 146:03e976389d16 33 /** A serial port (UART) for communication with other serial devices
mega64 146:03e976389d16 34 *
mega64 146:03e976389d16 35 * Can be used for Full Duplex communication, or Simplex by specifying
mega64 146:03e976389d16 36 * one pin as NC (Not Connected)
mega64 146:03e976389d16 37 *
mega64 146:03e976389d16 38 * @Note Synchronization level: Thread safe
mega64 146:03e976389d16 39 *
mega64 146:03e976389d16 40 * Example:
mega64 146:03e976389d16 41 * @code
mega64 146:03e976389d16 42 * // Print "Hello World" to the PC
mega64 146:03e976389d16 43 *
mega64 146:03e976389d16 44 * #include "mbed.h"
mega64 146:03e976389d16 45 *
mega64 146:03e976389d16 46 * Serial pc(USBTX, USBRX);
mega64 146:03e976389d16 47 *
mega64 146:03e976389d16 48 * int main() {
mega64 146:03e976389d16 49 * pc.printf("Hello World\n");
mega64 146:03e976389d16 50 * }
mega64 146:03e976389d16 51 * @endcode
mega64 146:03e976389d16 52 */
mega64 146:03e976389d16 53 class Serial : public SerialBase, public Stream {
mega64 146:03e976389d16 54
mega64 146:03e976389d16 55 public:
mega64 146:03e976389d16 56 #if DEVICE_SERIAL_ASYNCH
mega64 146:03e976389d16 57 using SerialBase::read;
mega64 146:03e976389d16 58 using SerialBase::write;
mega64 146:03e976389d16 59 #endif
mega64 146:03e976389d16 60
mega64 146:03e976389d16 61 /** Create a Serial port, connected to the specified transmit and receive pins
mega64 146:03e976389d16 62 *
mega64 146:03e976389d16 63 * @param tx Transmit pin
mega64 146:03e976389d16 64 * @param rx Receive pin
mega64 146:03e976389d16 65 * @param name The name of the stream associated with this serial port (optional)
mega64 146:03e976389d16 66 * @param baud The baud rate of the serial port (optional, defaults to MBED_CONF_PLATFORM_DEFAULT_SERIAL_BAUD_RATE)
mega64 146:03e976389d16 67 *
mega64 146:03e976389d16 68 * @note
mega64 146:03e976389d16 69 * Either tx or rx may be specified as NC if unused
mega64 146:03e976389d16 70 */
mega64 146:03e976389d16 71 Serial(PinName tx, PinName rx, const char *name=NULL, int baud = MBED_CONF_PLATFORM_DEFAULT_SERIAL_BAUD_RATE);
mega64 146:03e976389d16 72
mega64 146:03e976389d16 73
mega64 146:03e976389d16 74 /** Create a Serial port, connected to the specified transmit and receive pins, with the specified baud
mega64 146:03e976389d16 75 *
mega64 146:03e976389d16 76 * @param tx Transmit pin
mega64 146:03e976389d16 77 * @param rx Receive pin
mega64 146:03e976389d16 78 * @param baud The baud rate of the serial port
mega64 146:03e976389d16 79 *
mega64 146:03e976389d16 80 * @note
mega64 146:03e976389d16 81 * Either tx or rx may be specified as NC if unused
mega64 146:03e976389d16 82 */
mega64 146:03e976389d16 83 Serial(PinName tx, PinName rx, int baud);
mega64 146:03e976389d16 84
mega64 146:03e976389d16 85 protected:
mega64 146:03e976389d16 86 virtual int _getc();
mega64 146:03e976389d16 87 virtual int _putc(int c);
mega64 146:03e976389d16 88 virtual void lock();
mega64 146:03e976389d16 89 virtual void unlock();
mega64 146:03e976389d16 90
mega64 146:03e976389d16 91 PlatformMutex _mutex;
mega64 146:03e976389d16 92 };
mega64 146:03e976389d16 93
mega64 146:03e976389d16 94 } // namespace mbed
mega64 146:03e976389d16 95
mega64 146:03e976389d16 96 #endif
mega64 146:03e976389d16 97
mega64 146:03e976389d16 98 #endif
mega64 146:03e976389d16 99
mega64 146:03e976389d16 100 /** @}*/