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/DigitalOut.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_DIGITALOUT_H
mega64 146:03e976389d16 17 #define MBED_DIGITALOUT_H
mega64 146:03e976389d16 18
mega64 146:03e976389d16 19 #include "platform/platform.h"
mega64 146:03e976389d16 20 #include "hal/gpio_api.h"
mega64 146:03e976389d16 21 #include "platform/mbed_critical.h"
mega64 146:03e976389d16 22
mega64 146:03e976389d16 23 namespace mbed {
mega64 146:03e976389d16 24 /** \addtogroup drivers */
mega64 146:03e976389d16 25 /** @{*/
mega64 146:03e976389d16 26
mega64 146:03e976389d16 27 /** A digital output, used for setting the state of a pin
mega64 146:03e976389d16 28 *
mega64 146:03e976389d16 29 * @Note Synchronization level: Interrupt safe
mega64 146:03e976389d16 30 *
mega64 146:03e976389d16 31 * Example:
mega64 146:03e976389d16 32 * @code
mega64 146:03e976389d16 33 * // Toggle a LED
mega64 146:03e976389d16 34 * #include "mbed.h"
mega64 146:03e976389d16 35 *
mega64 146:03e976389d16 36 * DigitalOut led(LED1);
mega64 146:03e976389d16 37 *
mega64 146:03e976389d16 38 * int main() {
mega64 146:03e976389d16 39 * while(1) {
mega64 146:03e976389d16 40 * led = !led;
mega64 146:03e976389d16 41 * wait(0.2);
mega64 146:03e976389d16 42 * }
mega64 146:03e976389d16 43 * }
mega64 146:03e976389d16 44 * @endcode
mega64 146:03e976389d16 45 */
mega64 146:03e976389d16 46 class DigitalOut {
mega64 146:03e976389d16 47
mega64 146:03e976389d16 48 public:
mega64 146:03e976389d16 49 /** Create a DigitalOut connected to the specified pin
mega64 146:03e976389d16 50 *
mega64 146:03e976389d16 51 * @param pin DigitalOut pin to connect to
mega64 146:03e976389d16 52 */
mega64 146:03e976389d16 53 DigitalOut(PinName pin) : gpio() {
mega64 146:03e976389d16 54 // No lock needed in the constructor
mega64 146:03e976389d16 55 gpio_init_out(&gpio, pin);
mega64 146:03e976389d16 56 }
mega64 146:03e976389d16 57
mega64 146:03e976389d16 58 /** Create a DigitalOut connected to the specified pin
mega64 146:03e976389d16 59 *
mega64 146:03e976389d16 60 * @param pin DigitalOut pin to connect to
mega64 146:03e976389d16 61 * @param value the initial pin value
mega64 146:03e976389d16 62 */
mega64 146:03e976389d16 63 DigitalOut(PinName pin, int value) : gpio() {
mega64 146:03e976389d16 64 // No lock needed in the constructor
mega64 146:03e976389d16 65 gpio_init_out_ex(&gpio, pin, value);
mega64 146:03e976389d16 66 }
mega64 146:03e976389d16 67
mega64 146:03e976389d16 68 /** Set the output, specified as 0 or 1 (int)
mega64 146:03e976389d16 69 *
mega64 146:03e976389d16 70 * @param value An integer specifying the pin output value,
mega64 146:03e976389d16 71 * 0 for logical 0, 1 (or any other non-zero value) for logical 1
mega64 146:03e976389d16 72 */
mega64 146:03e976389d16 73 void write(int value) {
mega64 146:03e976389d16 74 // Thread safe / atomic HAL call
mega64 146:03e976389d16 75 gpio_write(&gpio, value);
mega64 146:03e976389d16 76 }
mega64 146:03e976389d16 77
mega64 146:03e976389d16 78 /** Return the output setting, represented as 0 or 1 (int)
mega64 146:03e976389d16 79 *
mega64 146:03e976389d16 80 * @returns
mega64 146:03e976389d16 81 * an integer representing the output setting of the pin,
mega64 146:03e976389d16 82 * 0 for logical 0, 1 for logical 1
mega64 146:03e976389d16 83 */
mega64 146:03e976389d16 84 int read() {
mega64 146:03e976389d16 85 // Thread safe / atomic HAL call
mega64 146:03e976389d16 86 return gpio_read(&gpio);
mega64 146:03e976389d16 87 }
mega64 146:03e976389d16 88
mega64 146:03e976389d16 89 /** Return the output setting, represented as 0 or 1 (int)
mega64 146:03e976389d16 90 *
mega64 146:03e976389d16 91 * @returns
mega64 146:03e976389d16 92 * Non zero value if pin is connected to uc GPIO
mega64 146:03e976389d16 93 * 0 if gpio object was initialized with NC
mega64 146:03e976389d16 94 */
mega64 146:03e976389d16 95 int is_connected() {
mega64 146:03e976389d16 96 // Thread safe / atomic HAL call
mega64 146:03e976389d16 97 return gpio_is_connected(&gpio);
mega64 146:03e976389d16 98 }
mega64 146:03e976389d16 99
mega64 146:03e976389d16 100 /** A shorthand for write()
mega64 146:03e976389d16 101 */
mega64 146:03e976389d16 102 DigitalOut& operator= (int value) {
mega64 146:03e976389d16 103 // Underlying write is thread safe
mega64 146:03e976389d16 104 write(value);
mega64 146:03e976389d16 105 return *this;
mega64 146:03e976389d16 106 }
mega64 146:03e976389d16 107
mega64 146:03e976389d16 108 DigitalOut& operator= (DigitalOut& rhs) {
mega64 146:03e976389d16 109 core_util_critical_section_enter();
mega64 146:03e976389d16 110 write(rhs.read());
mega64 146:03e976389d16 111 core_util_critical_section_exit();
mega64 146:03e976389d16 112 return *this;
mega64 146:03e976389d16 113 }
mega64 146:03e976389d16 114
mega64 146:03e976389d16 115 /** A shorthand for read()
mega64 146:03e976389d16 116 */
mega64 146:03e976389d16 117 operator int() {
mega64 146:03e976389d16 118 // Underlying call is thread safe
mega64 146:03e976389d16 119 return read();
mega64 146:03e976389d16 120 }
mega64 146:03e976389d16 121
mega64 146:03e976389d16 122 protected:
mega64 146:03e976389d16 123 gpio_t gpio;
mega64 146:03e976389d16 124 };
mega64 146:03e976389d16 125
mega64 146:03e976389d16 126 } // namespace mbed
mega64 146:03e976389d16 127
mega64 146:03e976389d16 128 #endif
mega64 146:03e976389d16 129
mega64 146:03e976389d16 130 /** @}*/