Konstantin Kochin / Mbed OS STM32F103C8T6_USBSerial_Demo

Demo of the usage USBDevice library with Blue Pill STM32F103C8T6 board.

Dependencies:   USBDevice

STM32F103C8T6 USBSerial Demo

This project contains demo of the USB serial usage for a cheap developer board Blue Pill with STM32F103C8T6 mcu.

/media/uploads/vznncv/stm32f103c8_usbserial.jpg

The USB serial port provides a good communication channel between PC and microcontroller. Especially it can be useful for a debug purposes.

Notes

  • by the specifications this board has only 64KB of the flash, but actually it can have 128KB, that will be useful for a debug builds as it requires about 100KB of the flash for this demo.
  • the board can have some problems with an USB because it has wrong value of the pull-up resistor
  • for steady reading of data from a serial port, the project contains python script serial_reader.py (it requires PySerial and six python libraries), that is steady to the board reloading
  • the project depends on the fork of the USBDevice library. This fork contains some fixes and support of the BLUE_PILL_STM32F103C8 target.
  • the mbed-os now contains correct code for a clock initialization of the BLUE_PILL_STM32F103C8 target, so you don't need to adjust the board clocks separately

mbed_settings.py

Committer:
Konstantin Kochin
Date:
2017-08-04
Revision:
0:24604e97c40c

File content as of revision 0:24604e97c40c:

"""
mbed SDK
Copyright (c) 2016 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.
"""

from os.path import join, abspath, dirname

#ROOT = abspath(join(dirname(__file__), "."))

##############################################################################
# Build System Settings
##############################################################################
#BUILD_DIR = abspath(join(ROOT, "build"))

# ARM
#ARM_PATH = "C:/Program Files/ARM"

# GCC ARM
#GCC_ARM_PATH = ""

# GCC CodeRed
#GCC_CR_PATH = "C:/code_red/RedSuite_4.2.0_349/redsuite/Tools/bin"

# IAR
#IAR_PATH = "C:/Program Files (x86)/IAR Systems/Embedded Workbench 7.0/arm"

# Goanna static analyser. Please overload it in private_settings.py
#GOANNA_PATH = "c:/Program Files (x86)/RedLizards/Goanna Central 3.2.3/bin"

#BUILD_OPTIONS = []

# mbed.org username
#MBED_ORG_USER = ""