Bare-metal configuration with EventQueue for a Bluepill board.

Warning

It does not work with the Mbed Online Compiler.

Follow these steps to import and compile it with Mbed CLI:

mbed import https://os.mbed.com/users/hudakz/code/Baremetal_EventQue_Bluepill
mbed compile -t GCC_ARM -m bluepill
Revision:
0:2cf53c219693
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/TARGET_BLUEPILL/device/cmsis_nvic.h	Thu May 14 05:27:57 2020 +0000
@@ -0,0 +1,40 @@
+/* mbed Microcontroller Library
+ *******************************************************************************
+ * Copyright (c) 2016, STMicroelectronics
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. Neither the name of STMicroelectronics nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *******************************************************************************
+ */
+
+#ifndef MBED_CMSIS_NVIC_H
+#define MBED_CMSIS_NVIC_H
+
+// CORE: 16 vectors (= 64 bytes from 0x00 to 0x3F)
+// MCU Peripherals: 43 vectors (= 172 bytes from 0x40 to 0xEB)
+// Total:  236 bytes to be reserved in RAM (see scatter file)
+#define NVIC_NUM_VECTORS        (16 + 43)
+#define NVIC_RAM_VECTOR_ADDRESS 0x20000000    // Vectors positioned at start of RAM
+
+#endif