File content as of revision 4:6568c3b20d29:

/* mbed Microcontroller Library
 *******************************************************************************
 * Copyright (c) 2014, STMicroelectronics
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 * 3. Neither the name of STMicroelectronics nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *******************************************************************************
 *
 * Modified for Maple mini board by Zoltan Hudak, 2016
 * Modified for Bluepill board by Zoltan Hudak, 2016
 * Modified for #ifdef selectable boards and added Nucleo external oscillator by Mark Peter Vargha, 2017
 * Added #ifdefs to avoid compile errors, so it is easy to select target board: Bluepill, Maple Mini, Nucleo F103, Nucleo F103 with external 8MHz crystal
 *
 */
 /**
 * Example:
 * @code
 #define USE_BOARD USE_MAPLE_MINI

#include "stm32f103variants.h"
#include "mbed.h"

DigitalOut led1(LED1);
Serial serialPc(PA_9, PA_10);  //Tx, Rx

int main()
{
    led1 = 0;
    confSysClock();
    serialPc.baud(460800);
    serialPc.printf("This is a STM32F103 test.\r\n");
    serialPc.printf("CPU SystemCoreClock is %d Hz\r\n", SystemCoreClock);
    serialPc.printf("LED=%d\r\n", led1.read());

    while (true)
    {
        led1 = !led1;
        serialPc.printf("LED=%d\r\n", led1.read());
        wait(1.0);
    }
}
 *
 */

#ifndef STM32F103variants_H_INCLUDED
#define STM32F103variants_H_INCLUDED

#define USE_OTHER 0
#define USE_BLUEPILL 1
#define USE_MAPLE_MINI 2
#define USE_NUCLEO_EXTOSC 3

#ifndef USE_BOARD
#define USE_BOARD USE_OTHER
#endif

#if (USE_BOARD == USE_BLUEPILL)

#ifndef MBED_PINNAMES_H
#define MBED_PINNAMES_H

#include "cmsis.h"

#ifdef __cplusplus
extern "C" {
#endif //__cplusplus

#define STM_PIN_DATA(MODE, PUPD, AFNUM)  ((int)(((MODE  & 0x0F) << 0) |\
                                                ((PUPD  & 0x07) << 4) |\
                                                ((AFNUM & 0x0F) << 7)))

#define STM_PIN_DATA_EXT(MODE, PUPD, AFNUM, CHANNEL, INVERTED)  ((int)(((MODE     & 0x0F) <<  0) |\
                                                                       ((PUPD     & 0x07) <<  4) |\
                                                                       ((AFNUM    & 0x0F) <<  7) |\
                                                                       ((CHANNEL  & 0x0F) << 11) |\
                                                                       ((INVERTED & 0x01) << 15)))

#define STM_PIN_MODE(X)   (((X) >> 0) & 0x0F)
#define STM_PIN_PUPD(X)   (((X) >> 4) & 0x07)
#define STM_PIN_AFNUM(X)  (((X) >> 7) & 0x0F)
#define STM_PIN_CHANNEL(X)  (((X) >> 11) & 0x0F)
#define STM_PIN_INVERTED(X) (((X) >> 15) & 0x01)

#define STM_MODE_INPUT              (0)
#define STM_MODE_OUTPUT_PP          (1)
#define STM_MODE_OUTPUT_OD          (2)
#define STM_MODE_AF_PP              (3)
#define STM_MODE_AF_OD              (4)
#define STM_MODE_ANALOG             (5)
#define STM_MODE_IT_RISING          (6)
#define STM_MODE_IT_FALLING         (7)
#define STM_MODE_IT_RISING_FALLING  (8)
#define STM_MODE_EVT_RISING         (9)
#define STM_MODE_EVT_FALLING        (10)
#define STM_MODE_EVT_RISING_FALLING (11)
#define STM_MODE_IT_EVT_RESET       (12)

// High nibble = port number (0=A, 1=B, 2=C, 3=D, 4=E, 5=F, 6=G, 7=H)
// Low nibble  = pin number
#define STM_PORT(X) (((uint32_t)(X) >> 4) & 0xF)
#define STM_PIN(X)  ((uint32_t)(X) & 0xF)

typedef enum {
    PIN_INPUT,
    PIN_OUTPUT
} PinDirection;

typedef enum {
    // Not connected
    NC = (int)0xFFFFFFFF,

    // Ports
    PA_0  = 0x00,
    PA_1  = 0x01,
    PA_2  = 0x02,
    PA_3  = 0x03,
    PA_4  = 0x04,
    PA_5  = 0x05,
    PA_6  = 0x06,
    PA_7  = 0x07,
    PA_8  = 0x08,
    PA_9  = 0x09,
    PA_10 = 0x0A,
    PA_11 = 0x0B,
    PA_12 = 0x0C,
    PA_13 = NC,
    PA_14 = NC,
    PA_15 = 0x0F,

    PB_0  = 0x10,
    PB_1  = 0x11,
    PB_2  = NC,
    PB_3  = 0x13,
    PB_4  = 0x14,
    PB_5  = 0x15,
    PB_6  = 0x16,
    PB_7  = 0x17,
    PB_8  = 0x18,
    PB_9  = 0x19,
    PB_10 = 0x1A,
    PB_11 = 0x1B,
    PB_12 = 0x1C,
    PB_13 = 0x1D,
    PB_14 = 0x1E,
    PB_15 = 0x1F,

    PC_0  = NC,
    PC_1  = NC,
    PC_2  = NC,
    PC_3  = NC,
    PC_4  = NC,
    PC_5  = NC,
    PC_6  = NC,
    PC_7  = NC,
    PC_8  = NC,
    PC_9  = NC,
    PC_10 = NC,
    PC_11 = NC,
    PC_12 = NC,
    PC_13 = 0x2D,
    PC_14 = 0x2E,
    PC_15 = 0x2F,

    PD_2  = NC,

    // ADC internal channels
    ADC_TEMP = 0xF0,
    ADC_VREF = 0xF1,

    // Arduino connector namings
    A0          = PA_0,
    A1          = PA_1,
    A2          = PA_4,
    A3          = PB_0,
    A4          = NC,
    A5          = NC,
    D0          = PA_3,
    D1          = PA_2,
    D2          = PA_10,
    D3          = PB_3,
    D4          = PB_5,
    D5          = PB_4,
    D6          = PB_10,
    D7          = PA_8,
    D8          = PA_9,
    D9          = NC,
    D10         = PB_6,
    D11         = PA_7,
    D12         = PA_6,
    D13         = PA_5,
    D14         = PB_9,
    D15         = PB_8,

    // Generic signals namings
    LED1        = PC_13,
    LED2        = NC,
    LED3        = NC,
    LED4        = NC,
    USER_BUTTON = NC,
    SERIAL_TX   = PA_2,
    SERIAL_RX   = PA_3,
    USBTX       = PA_2,
    USBRX       = PA_3,
    I2C_SCL     = PB_8,
    I2C_SDA     = PB_9,
    SPI_MOSI    = PA_7,
    SPI_MISO    = PA_6,
    SPI_SCK     = PA_5,
    SPI_CS      = PB_6,
    PWM_OUT     = PB_3
} PinName;

typedef enum {
    PullNone  = 0,
    PullUp    = 1,
    PullDown  = 2,
    OpenDrain = 3,
    PullDefault = PullNone
} PinMode;

#ifdef __cplusplus
}
#endif

#endif //MBED_PINNAMES_H

#endif //USE_BLUEPILL

/*
*********************************************************************************************************************
*/

#if (USE_BOARD == USE_MAPLE_MINI)

#ifndef MBED_PINNAMES_H
#define MBED_PINNAMES_H

#include "cmsis.h"

#ifdef __cplusplus
extern "C" {
#endif

#define STM_PIN_DATA(MODE, PUPD, AFNUM)  ((int)(((MODE  & 0x0F) << 0) |\
                                                ((PUPD  & 0x07) << 4) |\
                                                ((AFNUM & 0x0F) << 7)))

#define STM_PIN_DATA_EXT(MODE, PUPD, AFNUM, CHANNEL, INVERTED)  ((int)(((MODE     & 0x0F) <<  0) |\
                                                                       ((PUPD     & 0x07) <<  4) |\
                                                                       ((AFNUM    & 0x0F) <<  7) |\
                                                                       ((CHANNEL  & 0x0F) << 11) |\
                                                                       ((INVERTED & 0x01) << 15)))

#define STM_PIN_MODE(X)   (((X) >> 0) & 0x0F)
#define STM_PIN_PUPD(X)   (((X) >> 4) & 0x07)
#define STM_PIN_AFNUM(X)  (((X) >> 7) & 0x0F)
#define STM_PIN_CHANNEL(X)  (((X) >> 11) & 0x0F)
#define STM_PIN_INVERTED(X) (((X) >> 15) & 0x01)

#define STM_MODE_INPUT              (0)
#define STM_MODE_OUTPUT_PP          (1)
#define STM_MODE_OUTPUT_OD          (2)
#define STM_MODE_AF_PP              (3)
#define STM_MODE_AF_OD              (4)
#define STM_MODE_ANALOG             (5)
#define STM_MODE_IT_RISING          (6)
#define STM_MODE_IT_FALLING         (7)
#define STM_MODE_IT_RISING_FALLING  (8)
#define STM_MODE_EVT_RISING         (9)
#define STM_MODE_EVT_FALLING        (10)
#define STM_MODE_EVT_RISING_FALLING (11)
#define STM_MODE_IT_EVT_RESET       (12)

// High nibble = port number (0=A, 1=B, 2=C, 3=D, 4=E, 5=F, 6=G, 7=H)
// Low nibble  = pin number
#define STM_PORT(X) (((uint32_t)(X) >> 4) & 0xF)
#define STM_PIN(X)  ((uint32_t)(X) & 0xF)

typedef enum {
    PIN_INPUT,
    PIN_OUTPUT
} PinDirection;

typedef enum {
    // Not connected
    NC = (int)0xFFFFFFFF,

    PA_0  = 0x00,
    PA_1  = 0x01,
    PA_2  = 0x02,
    PA_3  = 0x03,
    PA_4  = 0x04,
    PA_5  = 0x05,
    PA_6  = 0x06,
    PA_7  = 0x07,
    PA_8  = 0x08,
    PA_9  = 0x09,
    PA_10 = 0x0A,
    PA_11 = 0x0B,
    PA_12 = 0x0C,
    PA_13 = 0x0D,
    PA_14 = 0x0E,
    PA_15 = 0x0F,

    PB_0  = 0x10,
    PB_1  = 0x11,
    PB_2  = 0x12,
    PB_3  = 0x13,
    PB_4  = 0x14,
    PB_5  = 0x15,
    PB_6  = 0x16,
    PB_7  = 0x17,
    PB_8  = 0x18,
    PB_9  = 0x19,
    PB_10 = 0x1A,
    PB_11 = 0x1B,
    PB_12 = 0x1C,
    PB_13 = 0x1D,
    PB_14 = 0x1E,
    PB_15 = 0x1F,

    PC_0  = NC,
    PC_1  = NC,
    PC_2  = NC,
    PC_3  = NC,
    PC_4  = NC,
    PC_5  = NC,
    PC_6  = NC,
    PC_7  = NC,
    PC_8  = NC,
    PC_9  = NC,
    PC_10 = NC,
    PC_11 = NC,
    PC_12 = NC,
    PC_13 = 0x2D,
    PC_14 = 0x2E,
    PC_15 = 0x2F,

    PD_2  = NC,

    // ADC internal channels
    ADC_TEMP = 0xF0,
    ADC_VREF = 0xF1,

    // Arduino connector namings
    A0          = PA_0,
    A1          = PA_1,
    A2          = PA_4,
    A3          = PB_0,
    A4          = NC,
    A5          = NC,
    D0          = PA_3,
    D1          = PA_2,
    D2          = PA_10,
    D3          = PB_3,
    D4          = PB_5,
    D5          = PB_4,
    D6          = PB_10,
    D7          = PA_8,
    D8          = PA_9,
    D9          = NC,
    D10         = PB_6,
    D11         = PA_7,
    D12         = PA_6,
    D13         = PA_5,
    D14         = PB_9,
    D15         = PB_8,

    // Generic signals namings
    LED1        = PB_1,
    USER_BUTTON = PB_8,
    SERIAL_TX   = PA_2,
    SERIAL_RX   = PA_3,
    USBTX       = PA_2,
    USBRX       = PA_3,
    I2C_SCL     = PB_6,
    I2C_SDA     = PB_7,
    SPI_MOSI    = PA_7,
    SPI_MISO    = PA_6,
    SPI_SCK     = PA_5,
    SPI_CS      = PB_6,
    PWM_OUT     = PB_3

} PinName;

typedef enum {
    PullNone  = 0,
    PullUp    = 1,
    PullDown  = 2,
    OpenDrain = 3,
    PullDefault = PullNone
} PinMode;

#ifdef __cplusplus
}
#endif //__cplusplus

#endif //MBED_PINNAMES_H

#endif //USE_MAPLE_MINI

#if (USE_BOARD > USE_OTHER)

bool HSE_SystemClock_Config(void) {
    RCC_OscInitTypeDef RCC_OscInitStruct;

    RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
    RCC_OscInitStruct.HSEState = RCC_HSE_ON;
    RCC_OscInitStruct.HSEPredivValue = RCC_HSE_PREDIV_DIV1;
    RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
    RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
    RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL9;

    if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) {
        return false;
    }

    RCC_ClkInitTypeDef RCC_ClkInitStruct;

    RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
                                |RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;
    RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
    RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
    RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2;
    RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
    if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK) {
        return false;
    }

    RCC_PeriphCLKInitTypeDef PeriphClkInit;

    PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_ADC|RCC_PERIPHCLK_USB;
    PeriphClkInit.AdcClockSelection = RCC_ADCPCLK2_DIV6;
    PeriphClkInit.UsbClockSelection = RCC_USBPLLCLK_DIV1_5;
    if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInit) != HAL_OK) {
        return false;
    }
    return true;
}

bool doConfSysClock()
{
    HAL_RCC_DeInit();
    if (!HSE_SystemClock_Config()) {
        return false;
    }
    SystemCoreClockUpdate();
    return true;
}

#endif //(USE_BOARD > USE_OTHER)

bool confSysClock(void) {
#if (USE_BOARD > USE_OTHER)
    return doConfSysClock();
#else
    return false;
#endif
}

#endif /* STM32F103variants_H_INCLUDED */