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)

hal/pwmout_api.h

Committer:
mega64
Date:
2017-04-27
Revision:
148:8b0b02bf146f
Parent:
147:38a0c20c7b3e

File content as of revision 148:8b0b02bf146f:


/** \addtogroup hal */
/** @{*/
/* mbed Microcontroller Library
 * Copyright (c) 2006-2013 ARM Limited
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
#ifndef MBED_PWMOUT_API_H
#define MBED_PWMOUT_API_H

#include "device.h"

#if DEVICE_PWMOUT

#ifdef __cplusplus
extern "C" {
#endif

/** Pwmout hal structure. pwmout_s is declared in the target's hal
 */
typedef struct pwmout_s pwmout_t;

/**
 * \defgroup hal_pwmout Pwmout hal functions
 * @{
 */

/** Initialize the pwm out peripheral and configure the pin
 *
 * @param obj The pwmout object to initialize
 * @param pin The pwmout pin to initialize
 */
void pwmout_init(pwmout_t *obj, PinName pin);

/** Deinitialize the pwmout object
 *
 * @param obj The pwmout object
 */
void pwmout_free(pwmout_t *obj);

/** Set the output duty-cycle in range <0.0f, 1.0f>
 *
 * Value 0.0f represents 0 percentage, 1.0f represents 100 percent.
 * @param obj     The pwmout object
 * @param percent The floating-point percentage number
 */
void pwmout_write(pwmout_t *obj, float percent);

/** Read the current float-point output duty-cycle
 *
 * @param obj The pwmout object
 * @return A floating-point output duty-cycle
 */
float pwmout_read(pwmout_t *obj);

/** Set the PWM period specified in seconds, keeping the duty cycle the same
 *
 * Periods smaller than microseconds (the lowest resolution) are set to zero.
 * @param obj     The pwmout object
 * @param seconds The floating-point seconds period
 */
void pwmout_period(pwmout_t *obj, float seconds);

/** Set the PWM period specified in miliseconds, keeping the duty cycle the same
 *
 * @param obj The pwmout object
 * @param ms  The milisecond period
 */
void pwmout_period_ms(pwmout_t *obj, int ms);

/** Set the PWM period specified in microseconds, keeping the duty cycle the same
 *
 * @param obj The pwmout object
 * @param us  The microsecond period
 */
void pwmout_period_us(pwmout_t *obj, int us);

/** Set the PWM pulsewidth specified in seconds, keeping the period the same.
 *
 * @param obj     The pwmout object
 * @param seconds The floating-point pulsewidth in seconds
 */
void pwmout_pulsewidth(pwmout_t *obj, float seconds);

/** Set the PWM pulsewidth specified in miliseconds, keeping the period the same.
 *
 * @param obj The pwmout object
 * @param ms  The floating-point pulsewidth in miliseconds
 */
void pwmout_pulsewidth_ms(pwmout_t *obj, int ms);

/** Set the PWM pulsewidth specified in microseconds, keeping the period the same.
 *
 * @param obj The pwmout object
 * @param us  The floating-point pulsewidth in microseconds
 */
void pwmout_pulsewidth_us(pwmout_t *obj, int us);

/**@}*/

#ifdef __cplusplus
}
#endif

#endif

#endif

/** @}*/