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

Diff: mbed_config.h

Revision:
0:24604e97c40c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed_config.h	Fri Aug 04 18:41:22 2017 +0300
@@ -0,0 +1,42 @@
+/*
+ * mbed SDK
+ * Copyright (c) 2017 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.
+ */
+
+// Automatically generated configuration file.
+// DO NOT EDIT, content will be overwritten.
+
+#ifndef __MBED_CONFIG_DATA__
+#define __MBED_CONFIG_DATA__
+
+// Configuration parameters
+#define MBED_CONF_DRIVERS_UART_SERIAL_RXBUF_SIZE       256    // set by library:drivers
+#define MBED_CONF_DRIVERS_UART_SERIAL_TXBUF_SIZE       256    // set by library:drivers
+#define MBED_CONF_NSAPI_PRESENT                        1      // set by library:nsapi
+#define MBED_CONF_FILESYSTEM_PRESENT                   1      // set by library:filesystem
+#define MBED_CONF_PPP_CELL_IFACE_BAUD_RATE             115200 // set by library:ppp-cell-iface
+#define MBED_CONF_PLATFORM_STDIO_CONVERT_NEWLINES      0      // set by library:platform
+#define MBED_CONF_PPP_CELL_IFACE_APN_LOOKUP            0      // set by library:ppp-cell-iface
+#define MBED_CONF_EVENTS_PRESENT                       1      // set by library:events
+#define MBED_CONF_RTOS_PRESENT                         1      // set by library:rtos
+#define MBED_CONF_PPP_CELL_IFACE_AT_PARSER_BUFFER_SIZE 256    // set by library:ppp-cell-iface
+#define MBED_CONF_PLATFORM_STDIO_BAUD_RATE             9600   // set by library:platform
+#define MBED_CONF_PLATFORM_DEFAULT_SERIAL_BAUD_RATE    9600   // set by library:platform
+#define MBED_CONF_PPP_CELL_IFACE_AT_PARSER_TIMEOUT     8000   // set by library:ppp-cell-iface
+#define MBED_CONF_PLATFORM_STDIO_FLUSH_AT_EXIT         1      // set by library:platform
+// Macros
+#define UNITY_INCLUDE_CONFIG_H                                // defined by library:utest
+
+#endif