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)

targets/TARGET_STM/lp_ticker.c@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 *******************************************************************************
mega64 146:03e976389d16 3 * Copyright (c) 2016, STMicroelectronics
mega64 146:03e976389d16 4 * All rights reserved.
mega64 146:03e976389d16 5 *
mega64 146:03e976389d16 6 * Redistribution and use in source and binary forms, with or without
mega64 146:03e976389d16 7 * modification, are permitted provided that the following conditions are met:
mega64 146:03e976389d16 8 *
mega64 146:03e976389d16 9 * 1. Redistributions of source code must retain the above copyright notice,
mega64 146:03e976389d16 10 * this list of conditions and the following disclaimer.
mega64 146:03e976389d16 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
mega64 146:03e976389d16 12 * this list of conditions and the following disclaimer in the documentation
mega64 146:03e976389d16 13 * and/or other materials provided with the distribution.
mega64 146:03e976389d16 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mega64 146:03e976389d16 15 * may be used to endorse or promote products derived from this software
mega64 146:03e976389d16 16 * without specific prior written permission.
mega64 146:03e976389d16 17 *
mega64 146:03e976389d16 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mega64 146:03e976389d16 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mega64 146:03e976389d16 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mega64 146:03e976389d16 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mega64 146:03e976389d16 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mega64 146:03e976389d16 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mega64 146:03e976389d16 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mega64 146:03e976389d16 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mega64 146:03e976389d16 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mega64 146:03e976389d16 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mega64 146:03e976389d16 28 *******************************************************************************
mega64 146:03e976389d16 29 */
mega64 146:03e976389d16 30 #include "device.h"
mega64 146:03e976389d16 31
mega64 146:03e976389d16 32 #if DEVICE_LOWPOWERTIMER
mega64 146:03e976389d16 33
mega64 146:03e976389d16 34 #include "ticker_api.h"
mega64 146:03e976389d16 35 #include "lp_ticker_api.h"
mega64 146:03e976389d16 36 #include "rtc_api.h"
mega64 146:03e976389d16 37 #include "rtc_api_hal.h"
mega64 146:03e976389d16 38
mega64 146:03e976389d16 39 static uint8_t lp_ticker_inited = 0;
mega64 146:03e976389d16 40
mega64 146:03e976389d16 41 void lp_ticker_init(void)
mega64 146:03e976389d16 42 {
mega64 146:03e976389d16 43 if (lp_ticker_inited) return;
mega64 146:03e976389d16 44 lp_ticker_inited = 1;
mega64 146:03e976389d16 45
mega64 146:03e976389d16 46 rtc_init();
mega64 146:03e976389d16 47 rtc_set_irq_handler((uint32_t) lp_ticker_irq_handler);
mega64 146:03e976389d16 48 }
mega64 146:03e976389d16 49
mega64 146:03e976389d16 50 uint32_t lp_ticker_read(void)
mega64 146:03e976389d16 51 {
mega64 146:03e976389d16 52 uint32_t usecs = 0;
mega64 146:03e976389d16 53 time_t time = 0;
mega64 146:03e976389d16 54
mega64 146:03e976389d16 55 lp_ticker_init();
mega64 146:03e976389d16 56
mega64 146:03e976389d16 57 do {
mega64 146:03e976389d16 58 time = rtc_read();
mega64 146:03e976389d16 59 usecs = rtc_read_subseconds();
mega64 146:03e976389d16 60 } while (time != rtc_read());
mega64 146:03e976389d16 61
mega64 146:03e976389d16 62 return (time * 1000000) + usecs;
mega64 146:03e976389d16 63 }
mega64 146:03e976389d16 64
mega64 146:03e976389d16 65 void lp_ticker_set_interrupt(timestamp_t timestamp)
mega64 146:03e976389d16 66 {
mega64 146:03e976389d16 67 uint32_t delta;
mega64 146:03e976389d16 68
mega64 146:03e976389d16 69 delta = timestamp - lp_ticker_read();
mega64 146:03e976389d16 70 rtc_set_wake_up_timer(delta);
mega64 146:03e976389d16 71 }
mega64 146:03e976389d16 72
mega64 146:03e976389d16 73 void lp_ticker_disable_interrupt(void)
mega64 146:03e976389d16 74 {
mega64 146:03e976389d16 75 rtc_deactivate_wake_up_timer();
mega64 146:03e976389d16 76 }
mega64 146:03e976389d16 77
mega64 146:03e976389d16 78 void lp_ticker_clear_interrupt(void)
mega64 146:03e976389d16 79 {
mega64 146:03e976389d16 80
mega64 146:03e976389d16 81 }
mega64 146:03e976389d16 82
mega64 146:03e976389d16 83 #endif