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/mbed_rtc_time.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
mega64 146:03e976389d16 2 /** \addtogroup platform */
mega64 146:03e976389d16 3 /** @{*/
mega64 146:03e976389d16 4 /* mbed Microcontroller Library
mega64 146:03e976389d16 5 * Copyright (c) 2006-2013 ARM Limited
mega64 146:03e976389d16 6 *
mega64 146:03e976389d16 7 * Licensed under the Apache License, Version 2.0 (the "License");
mega64 146:03e976389d16 8 * you may not use this file except in compliance with the License.
mega64 146:03e976389d16 9 * You may obtain a copy of the License at
mega64 146:03e976389d16 10 *
mega64 146:03e976389d16 11 * http://www.apache.org/licenses/LICENSE-2.0
mega64 146:03e976389d16 12 *
mega64 146:03e976389d16 13 * Unless required by applicable law or agreed to in writing, software
mega64 146:03e976389d16 14 * distributed under the License is distributed on an "AS IS" BASIS,
mega64 146:03e976389d16 15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
mega64 146:03e976389d16 16 * See the License for the specific language governing permissions and
mega64 146:03e976389d16 17 * limitations under the License.
mega64 146:03e976389d16 18 */
mega64 146:03e976389d16 19
mega64 146:03e976389d16 20 #include <time.h>
mega64 146:03e976389d16 21
mega64 146:03e976389d16 22 #ifdef __cplusplus
mega64 146:03e976389d16 23 extern "C" {
mega64 146:03e976389d16 24 #endif
mega64 146:03e976389d16 25
mega64 146:03e976389d16 26 /** Implementation of the C time.h functions
mega64 146:03e976389d16 27 *
mega64 146:03e976389d16 28 * Provides mechanisms to set and read the current time, based
mega64 146:03e976389d16 29 * on the microcontroller Real-Time Clock (RTC), plus some
mega64 146:03e976389d16 30 * standard C manipulation and formating functions.
mega64 146:03e976389d16 31 *
mega64 146:03e976389d16 32 * Example:
mega64 146:03e976389d16 33 * @code
mega64 146:03e976389d16 34 * #include "mbed.h"
mega64 146:03e976389d16 35 *
mega64 146:03e976389d16 36 * int main() {
mega64 146:03e976389d16 37 * set_time(1256729737); // Set RTC time to Wed, 28 Oct 2009 11:35:37
mega64 146:03e976389d16 38 *
mega64 146:03e976389d16 39 * while(1) {
mega64 146:03e976389d16 40 * time_t seconds = time(NULL);
mega64 146:03e976389d16 41 *
mega64 146:03e976389d16 42 * printf("Time as seconds since January 1, 1970 = %d\n", seconds);
mega64 146:03e976389d16 43 *
mega64 146:03e976389d16 44 * printf("Time as a basic string = %s", ctime(&seconds));
mega64 146:03e976389d16 45 *
mega64 146:03e976389d16 46 * char buffer[32];
mega64 146:03e976389d16 47 * strftime(buffer, 32, "%I:%M %p\n", localtime(&seconds));
mega64 146:03e976389d16 48 * printf("Time as a custom formatted string = %s", buffer);
mega64 146:03e976389d16 49 *
mega64 146:03e976389d16 50 * wait(1);
mega64 146:03e976389d16 51 * }
mega64 146:03e976389d16 52 * }
mega64 146:03e976389d16 53 * @endcode
mega64 146:03e976389d16 54 */
mega64 146:03e976389d16 55
mega64 146:03e976389d16 56 /** Set the current time
mega64 146:03e976389d16 57 *
mega64 146:03e976389d16 58 * Initialises and sets the time of the microcontroller Real-Time Clock (RTC)
mega64 146:03e976389d16 59 * to the time represented by the number of seconds since January 1, 1970
mega64 146:03e976389d16 60 * (the UNIX timestamp).
mega64 146:03e976389d16 61 *
mega64 146:03e976389d16 62 * @param t Number of seconds since January 1, 1970 (the UNIX timestamp)
mega64 146:03e976389d16 63 *
mega64 146:03e976389d16 64 * @Note Synchronization level: Thread safe
mega64 146:03e976389d16 65 *
mega64 146:03e976389d16 66 * Example:
mega64 146:03e976389d16 67 * @code
mega64 146:03e976389d16 68 * #include "mbed.h"
mega64 146:03e976389d16 69 *
mega64 146:03e976389d16 70 * int main() {
mega64 146:03e976389d16 71 * set_time(1256729737); // Set time to Wed, 28 Oct 2009 11:35:37
mega64 146:03e976389d16 72 * }
mega64 146:03e976389d16 73 * @endcode
mega64 146:03e976389d16 74 */
mega64 146:03e976389d16 75 void set_time(time_t t);
mega64 146:03e976389d16 76
mega64 146:03e976389d16 77 /** Attach an external RTC to be used for the C time functions
mega64 146:03e976389d16 78 *
mega64 146:03e976389d16 79 * @Note Synchronization level: Thread safe
mega64 146:03e976389d16 80 *
mega64 146:03e976389d16 81 * @param read_rtc pointer to function which returns current UNIX timestamp
mega64 146:03e976389d16 82 * @param write_rtc pointer to function which sets current UNIX timestamp, can be NULL
mega64 146:03e976389d16 83 * @param init_rtc pointer to funtion which initializes RTC, can be NULL
mega64 146:03e976389d16 84 * @param isenabled_rtc pointer to function wich returns if the rtc is enabled, can be NULL
mega64 146:03e976389d16 85 */
mega64 146:03e976389d16 86 void attach_rtc(time_t (*read_rtc)(void), void (*write_rtc)(time_t), void (*init_rtc)(void), int (*isenabled_rtc)(void));
mega64 146:03e976389d16 87
mega64 146:03e976389d16 88 #ifdef __cplusplus
mega64 146:03e976389d16 89 }
mega64 146:03e976389d16 90 #endif
mega64 146:03e976389d16 91
mega64 146:03e976389d16 92 /** @}*/