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/PortOut.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_PORTOUT_H
mega64 146:03e976389d16 17 #define MBED_PORTOUT_H
mega64 146:03e976389d16 18
mega64 146:03e976389d16 19 #include "platform/platform.h"
mega64 146:03e976389d16 20
mega64 146:03e976389d16 21 #if DEVICE_PORTOUT
mega64 146:03e976389d16 22
mega64 146:03e976389d16 23 #include "hal/port_api.h"
mega64 146:03e976389d16 24 #include "platform/mbed_critical.h"
mega64 146:03e976389d16 25
mega64 146:03e976389d16 26 namespace mbed {
mega64 146:03e976389d16 27 /** \addtogroup drivers */
mega64 146:03e976389d16 28 /** @{*/
mega64 146:03e976389d16 29 /** A multiple pin digital out
mega64 146:03e976389d16 30 *
mega64 146:03e976389d16 31 * @Note Synchronization level: Interrupt safe
mega64 146:03e976389d16 32 *
mega64 146:03e976389d16 33 * Example:
mega64 146:03e976389d16 34 * @code
mega64 146:03e976389d16 35 * // Toggle all four LEDs
mega64 146:03e976389d16 36 *
mega64 146:03e976389d16 37 * #include "mbed.h"
mega64 146:03e976389d16 38 *
mega64 146:03e976389d16 39 * // LED1 = P1.18 LED2 = P1.20 LED3 = P1.21 LED4 = P1.23
mega64 146:03e976389d16 40 * #define LED_MASK 0x00B40000
mega64 146:03e976389d16 41 *
mega64 146:03e976389d16 42 * PortOut ledport(Port1, LED_MASK);
mega64 146:03e976389d16 43 *
mega64 146:03e976389d16 44 * int main() {
mega64 146:03e976389d16 45 * while(1) {
mega64 146:03e976389d16 46 * ledport = LED_MASK;
mega64 146:03e976389d16 47 * wait(1);
mega64 146:03e976389d16 48 * ledport = 0;
mega64 146:03e976389d16 49 * wait(1);
mega64 146:03e976389d16 50 * }
mega64 146:03e976389d16 51 * }
mega64 146:03e976389d16 52 * @endcode
mega64 146:03e976389d16 53 */
mega64 146:03e976389d16 54 class PortOut {
mega64 146:03e976389d16 55 public:
mega64 146:03e976389d16 56
mega64 146:03e976389d16 57 /** Create an PortOut, connected to the specified port
mega64 146:03e976389d16 58 *
mega64 146:03e976389d16 59 * @param port Port to connect to (Port0-Port5)
mega64 146:03e976389d16 60 * @param mask A bitmask to identify which bits in the port should be included (0 - ignore)
mega64 146:03e976389d16 61 */
mega64 146:03e976389d16 62 PortOut(PortName port, int mask = 0xFFFFFFFF) {
mega64 146:03e976389d16 63 core_util_critical_section_enter();
mega64 146:03e976389d16 64 port_init(&_port, port, mask, PIN_OUTPUT);
mega64 146:03e976389d16 65 core_util_critical_section_exit();
mega64 146:03e976389d16 66 }
mega64 146:03e976389d16 67
mega64 146:03e976389d16 68 /** Write the value to the output port
mega64 146:03e976389d16 69 *
mega64 146:03e976389d16 70 * @param value An integer specifying a bit to write for every corresponding PortOut pin
mega64 146:03e976389d16 71 */
mega64 146:03e976389d16 72 void write(int value) {
mega64 146:03e976389d16 73 port_write(&_port, value);
mega64 146:03e976389d16 74 }
mega64 146:03e976389d16 75
mega64 146:03e976389d16 76 /** Read the value currently output on the port
mega64 146:03e976389d16 77 *
mega64 146:03e976389d16 78 * @returns
mega64 146:03e976389d16 79 * An integer with each bit corresponding to associated PortOut pin setting
mega64 146:03e976389d16 80 */
mega64 146:03e976389d16 81 int read() {
mega64 146:03e976389d16 82 return port_read(&_port);
mega64 146:03e976389d16 83 }
mega64 146:03e976389d16 84
mega64 146:03e976389d16 85 /** A shorthand for write()
mega64 146:03e976389d16 86 */
mega64 146:03e976389d16 87 PortOut& operator= (int value) {
mega64 146:03e976389d16 88 write(value);
mega64 146:03e976389d16 89 return *this;
mega64 146:03e976389d16 90 }
mega64 146:03e976389d16 91
mega64 146:03e976389d16 92 PortOut& operator= (PortOut& rhs) {
mega64 146:03e976389d16 93 write(rhs.read());
mega64 146:03e976389d16 94 return *this;
mega64 146:03e976389d16 95 }
mega64 146:03e976389d16 96
mega64 146:03e976389d16 97 /** A shorthand for read()
mega64 146:03e976389d16 98 */
mega64 146:03e976389d16 99 operator int() {
mega64 146:03e976389d16 100 return read();
mega64 146:03e976389d16 101 }
mega64 146:03e976389d16 102
mega64 146:03e976389d16 103 private:
mega64 146:03e976389d16 104 port_t _port;
mega64 146:03e976389d16 105 };
mega64 146:03e976389d16 106
mega64 146:03e976389d16 107 } // namespace mbed
mega64 146:03e976389d16 108
mega64 146:03e976389d16 109 #endif
mega64 146:03e976389d16 110
mega64 146:03e976389d16 111 #endif
mega64 146:03e976389d16 112
mega64 146:03e976389d16 113 /** @}*/