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)

drivers/DigitalInOut.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 * Copyright (c) 2006-2013 ARM Limited
mega64 146:03e976389d16 3 *
mega64 146:03e976389d16 4 * Licensed under the Apache License, Version 2.0 (the "License");
mega64 146:03e976389d16 5 * you may not use this file except in compliance with the License.
mega64 146:03e976389d16 6 * You may obtain a copy of the License at
mega64 146:03e976389d16 7 *
mega64 146:03e976389d16 8 * http://www.apache.org/licenses/LICENSE-2.0
mega64 146:03e976389d16 9 *
mega64 146:03e976389d16 10 * Unless required by applicable law or agreed to in writing, software
mega64 146:03e976389d16 11 * distributed under the License is distributed on an "AS IS" BASIS,
mega64 146:03e976389d16 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
mega64 146:03e976389d16 13 * See the License for the specific language governing permissions and
mega64 146:03e976389d16 14 * limitations under the License.
mega64 146:03e976389d16 15 */
mega64 146:03e976389d16 16 #ifndef MBED_DIGITALINOUT_H
mega64 146:03e976389d16 17 #define MBED_DIGITALINOUT_H
mega64 146:03e976389d16 18
mega64 146:03e976389d16 19 #include "platform/platform.h"
mega64 146:03e976389d16 20
mega64 146:03e976389d16 21 #include "hal/gpio_api.h"
mega64 146:03e976389d16 22 #include "platform/mbed_critical.h"
mega64 146:03e976389d16 23
mega64 146:03e976389d16 24 namespace mbed {
mega64 146:03e976389d16 25 /** \addtogroup drivers */
mega64 146:03e976389d16 26 /** @{*/
mega64 146:03e976389d16 27
mega64 146:03e976389d16 28 /** A digital input/output, used for setting or reading a bi-directional pin
mega64 146:03e976389d16 29 *
mega64 146:03e976389d16 30 * @Note Synchronization level: Interrupt safe
mega64 146:03e976389d16 31 */
mega64 146:03e976389d16 32 class DigitalInOut {
mega64 146:03e976389d16 33
mega64 146:03e976389d16 34 public:
mega64 146:03e976389d16 35 /** Create a DigitalInOut connected to the specified pin
mega64 146:03e976389d16 36 *
mega64 146:03e976389d16 37 * @param pin DigitalInOut pin to connect to
mega64 146:03e976389d16 38 */
mega64 146:03e976389d16 39 DigitalInOut(PinName pin) : gpio() {
mega64 146:03e976389d16 40 // No lock needed in the constructor
mega64 146:03e976389d16 41 gpio_init_in(&gpio, pin);
mega64 146:03e976389d16 42 }
mega64 146:03e976389d16 43
mega64 146:03e976389d16 44 /** Create a DigitalInOut connected to the specified pin
mega64 146:03e976389d16 45 *
mega64 146:03e976389d16 46 * @param pin DigitalInOut pin to connect to
mega64 146:03e976389d16 47 * @param direction the initial direction of the pin
mega64 146:03e976389d16 48 * @param mode the initial mode of the pin
mega64 146:03e976389d16 49 * @param value the initial value of the pin if is an output
mega64 146:03e976389d16 50 */
mega64 146:03e976389d16 51 DigitalInOut(PinName pin, PinDirection direction, PinMode mode, int value) : gpio() {
mega64 146:03e976389d16 52 // No lock needed in the constructor
mega64 146:03e976389d16 53 gpio_init_inout(&gpio, pin, direction, mode, value);
mega64 146:03e976389d16 54 }
mega64 146:03e976389d16 55
mega64 146:03e976389d16 56 /** Set the output, specified as 0 or 1 (int)
mega64 146:03e976389d16 57 *
mega64 146:03e976389d16 58 * @param value An integer specifying the pin output value,
mega64 146:03e976389d16 59 * 0 for logical 0, 1 (or any other non-zero value) for logical 1
mega64 146:03e976389d16 60 */
mega64 146:03e976389d16 61 void write(int value) {
mega64 146:03e976389d16 62 // Thread safe / atomic HAL call
mega64 146:03e976389d16 63 gpio_write(&gpio, value);
mega64 146:03e976389d16 64 }
mega64 146:03e976389d16 65
mega64 146:03e976389d16 66 /** Return the output setting, represented as 0 or 1 (int)
mega64 146:03e976389d16 67 *
mega64 146:03e976389d16 68 * @returns
mega64 146:03e976389d16 69 * an integer representing the output setting of the pin if it is an output,
mega64 146:03e976389d16 70 * or read the input if set as an input
mega64 146:03e976389d16 71 */
mega64 146:03e976389d16 72 int read() {
mega64 146:03e976389d16 73 // Thread safe / atomic HAL call
mega64 146:03e976389d16 74 return gpio_read(&gpio);
mega64 146:03e976389d16 75 }
mega64 146:03e976389d16 76
mega64 146:03e976389d16 77 /** Set as an output
mega64 146:03e976389d16 78 */
mega64 146:03e976389d16 79 void output() {
mega64 146:03e976389d16 80 core_util_critical_section_enter();
mega64 146:03e976389d16 81 gpio_dir(&gpio, PIN_OUTPUT);
mega64 146:03e976389d16 82 core_util_critical_section_exit();
mega64 146:03e976389d16 83 }
mega64 146:03e976389d16 84
mega64 146:03e976389d16 85 /** Set as an input
mega64 146:03e976389d16 86 */
mega64 146:03e976389d16 87 void input() {
mega64 146:03e976389d16 88 core_util_critical_section_enter();
mega64 146:03e976389d16 89 gpio_dir(&gpio, PIN_INPUT);
mega64 146:03e976389d16 90 core_util_critical_section_exit();
mega64 146:03e976389d16 91 }
mega64 146:03e976389d16 92
mega64 146:03e976389d16 93 /** Set the input pin mode
mega64 146:03e976389d16 94 *
mega64 146:03e976389d16 95 * @param mode PullUp, PullDown, PullNone, OpenDrain
mega64 146:03e976389d16 96 */
mega64 146:03e976389d16 97 void mode(PinMode pull) {
mega64 146:03e976389d16 98 core_util_critical_section_enter();
mega64 146:03e976389d16 99 gpio_mode(&gpio, pull);
mega64 146:03e976389d16 100 core_util_critical_section_exit();
mega64 146:03e976389d16 101 }
mega64 146:03e976389d16 102
mega64 146:03e976389d16 103 /** Return the output setting, represented as 0 or 1 (int)
mega64 146:03e976389d16 104 *
mega64 146:03e976389d16 105 * @returns
mega64 146:03e976389d16 106 * Non zero value if pin is connected to uc GPIO
mega64 146:03e976389d16 107 * 0 if gpio object was initialized with NC
mega64 146:03e976389d16 108 */
mega64 146:03e976389d16 109 int is_connected() {
mega64 146:03e976389d16 110 // Thread safe / atomic HAL call
mega64 146:03e976389d16 111 return gpio_is_connected(&gpio);
mega64 146:03e976389d16 112 }
mega64 146:03e976389d16 113
mega64 146:03e976389d16 114 /** A shorthand for write()
mega64 146:03e976389d16 115 */
mega64 146:03e976389d16 116 DigitalInOut& operator= (int value) {
mega64 146:03e976389d16 117 // Underlying write is thread safe
mega64 146:03e976389d16 118 write(value);
mega64 146:03e976389d16 119 return *this;
mega64 146:03e976389d16 120 }
mega64 146:03e976389d16 121
mega64 146:03e976389d16 122 DigitalInOut& operator= (DigitalInOut& rhs) {
mega64 146:03e976389d16 123 core_util_critical_section_enter();
mega64 146:03e976389d16 124 write(rhs.read());
mega64 146:03e976389d16 125 core_util_critical_section_exit();
mega64 146:03e976389d16 126 return *this;
mega64 146:03e976389d16 127 }
mega64 146:03e976389d16 128
mega64 146:03e976389d16 129 /** A shorthand for read()
mega64 146:03e976389d16 130 */
mega64 146:03e976389d16 131 operator int() {
mega64 146:03e976389d16 132 // Underlying call is thread safe
mega64 146:03e976389d16 133 return read();
mega64 146:03e976389d16 134 }
mega64 146:03e976389d16 135
mega64 146:03e976389d16 136 protected:
mega64 146:03e976389d16 137 gpio_t gpio;
mega64 146:03e976389d16 138 };
mega64 146:03e976389d16 139
mega64 146:03e976389d16 140 } // namespace mbed
mega64 146:03e976389d16 141
mega64 146:03e976389d16 142 #endif
mega64 146:03e976389d16 143
mega64 146:03e976389d16 144 /** @}*/