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/gpio_object.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 *******************************************************************************
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 #ifndef MBED_GPIO_OBJECT_H
mega64 146:03e976389d16 31 #define MBED_GPIO_OBJECT_H
mega64 146:03e976389d16 32
mega64 146:03e976389d16 33 #include "mbed_assert.h"
mega64 146:03e976389d16 34 #include "cmsis.h"
mega64 146:03e976389d16 35 #include "PortNames.h"
mega64 146:03e976389d16 36 #include "PeripheralNames.h"
mega64 146:03e976389d16 37 #include "PinNames.h"
mega64 146:03e976389d16 38
mega64 146:03e976389d16 39 #ifdef __cplusplus
mega64 146:03e976389d16 40 extern "C" {
mega64 146:03e976389d16 41 #endif
mega64 146:03e976389d16 42
mega64 146:03e976389d16 43 /*
mega64 146:03e976389d16 44 * Note: reg_clr might actually be same as reg_set.
mega64 146:03e976389d16 45 * Depends on family whether BRR is available on top of BSRR
mega64 146:03e976389d16 46 * if BRR does not exist, family shall define GPIO_IP_WITHOUT_BRR
mega64 146:03e976389d16 47 */
mega64 146:03e976389d16 48 typedef struct {
mega64 146:03e976389d16 49 uint32_t mask;
mega64 146:03e976389d16 50 __IO uint32_t *reg_in;
mega64 146:03e976389d16 51 __IO uint32_t *reg_set;
mega64 146:03e976389d16 52 __IO uint32_t *reg_clr;
mega64 146:03e976389d16 53 PinName pin;
mega64 146:03e976389d16 54 GPIO_TypeDef *gpio;
mega64 146:03e976389d16 55 uint32_t ll_pin;
mega64 146:03e976389d16 56 } gpio_t;
mega64 146:03e976389d16 57
mega64 146:03e976389d16 58 static inline void gpio_write(gpio_t *obj, int value)
mega64 146:03e976389d16 59 {
mega64 146:03e976389d16 60 if (value) {
mega64 146:03e976389d16 61 *obj->reg_set = obj->mask;
mega64 146:03e976389d16 62 } else {
mega64 146:03e976389d16 63 #ifdef GPIO_IP_WITHOUT_BRR
mega64 146:03e976389d16 64 *obj->reg_clr = obj->mask << 16;
mega64 146:03e976389d16 65 #else
mega64 146:03e976389d16 66 *obj->reg_clr = obj->mask;
mega64 146:03e976389d16 67 #endif
mega64 146:03e976389d16 68 }
mega64 146:03e976389d16 69 }
mega64 146:03e976389d16 70
mega64 146:03e976389d16 71 static inline int gpio_read(gpio_t *obj)
mega64 146:03e976389d16 72 {
mega64 146:03e976389d16 73 return ((*obj->reg_in & obj->mask) ? 1 : 0);
mega64 146:03e976389d16 74 }
mega64 146:03e976389d16 75
mega64 146:03e976389d16 76 static inline int gpio_is_connected(const gpio_t *obj)
mega64 146:03e976389d16 77 {
mega64 146:03e976389d16 78 return obj->pin != (PinName)NC;
mega64 146:03e976389d16 79 }
mega64 146:03e976389d16 80
mega64 146:03e976389d16 81
mega64 146:03e976389d16 82 #ifdef __cplusplus
mega64 146:03e976389d16 83 }
mega64 146:03e976389d16 84 #endif
mega64 146:03e976389d16 85
mega64 146:03e976389d16 86 #endif