Add application useful in helping identifying electrical shorts.

This application tries to help finding elecrical shorts in the dev-bridge
board by configuring all pins but one at a time as input (pull-down), and
then outputing a bit to one pin and checking that none of the input pins
go high.

9 files changed, 1143 insertions, 0 deletions

diff --git a/src/short-test/Makefile b/src/short-test/Makefile
new file mode 100644
index 0000000..671f600
--- /dev/null
+++ b/src/short-test/Makefile
@@ -0,0 +1,49 @@
+# put your *.o targets here, make should handle the rest!
+SRCS = main.c stm_init.c stm32f4xx_it.c stm32f4xx_hal_msp.c
+
+# all the files will be generated with this name
+PROJ_NAME=short-test
+
+TOPLEVEL=../..
+include $(TOPLEVEL)/common.mk
+
+OBJS = $(SRCS:.c=.o)
+
+###################################################
+
+.PHONY: lib proj
+
+all: lib proj
+
+lib:
+	$(MAKE) -C $(STD_PERIPH_LIB) STDPERIPH_SETTINGS="$(STDPERIPH_SETTINGS) -I $(PWD)/include"
+
+proj: 	$(PROJ_NAME).elf
+
+$(PROJ_NAME).elf: $(SRCS)
+	$(CC) $(CFLAGS) $^ -o $@ -L$(STD_PERIPH_LIB) -lstmf4 -L$(LDSCRIPT_INC) -T$(MCU_LINKSCRIPT) -g
+	$(OBJCOPY) -O ihex $(PROJ_NAME).elf $(PROJ_NAME).hex
+	$(OBJCOPY) -O binary $(PROJ_NAME).elf $(PROJ_NAME).bin
+	$(OBJDUMP) -St $(PROJ_NAME).elf >$(PROJ_NAME).lst
+	$(SIZE) $(PROJ_NAME).elf
+
+clean:
+	find ./ -name '*~' | xargs rm -f
+	rm -f *.o
+	rm -f $(PROJ_NAME).elf
+	rm -f $(PROJ_NAME).hex
+	rm -f $(PROJ_NAME).bin
+	rm -f $(PROJ_NAME).map
+	rm -f $(PROJ_NAME).lst
+
+really-clean: clean
+	$(MAKE) -C $(STD_PERIPH_LIB) clean
+
+debug:
+    $(GDB) -ex "target remote localhost:3333" \
+        -ex "set remote hardware-breakpoint-limit 6" \
+        -ex "set remote hardware-watchpoint-limit 4" $(PROJ_NAME).elf
+
+flash-target:
+	$(OPENOCD) -f $(OPENOCD_BOARD_DIR)/$(OPENOCD_PROC_FILE) \
+		-c "program $(PROJ_NAME).elf verify reset"
diff --git a/src/short-test/README b/src/short-test/README
new file mode 100644
index 0000000..a001eec
--- /dev/null
+++ b/src/short-test/README
@@ -0,0 +1,15 @@
+This application tries to help finding elecrical shorts in the dev-bridge
+board by configuring all pins but one at a time as input (pull-down), and
+then outputing a bit to one pin and checking that none of the input pins
+go high.
+
+Usage:
+
+Flash it
+picocom -b 115200 /dev/ttyUSB0
+
+You should see nothing but line feeds in the terminal emulator.
+
+Red LED should stay OFF.
+
+Blue and green LED should toggle (in tandem).
diff --git a/src/short-test/include/stm32f4xx_hal_conf.h b/src/short-test/include/stm32f4xx_hal_conf.h
new file mode 100644
index 0000000..0b85bd9
--- /dev/null
+++ b/src/short-test/include/stm32f4xx_hal_conf.h
@@ -0,0 +1,401 @@
+/**
+  ******************************************************************************
+  * @file    stm32f4xx_hal_conf.h
+  * @brief   HAL configuration file.
+  ******************************************************************************
+  * @attention
+  *
+  * <h2><center>&copy; COPYRIGHT(c) 2015 STMicroelectronics</center></h2>
+  *
+  * 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.
+  *
+  ******************************************************************************
+  */
+
+/* Define to prevent recursive inclusion -------------------------------------*/
+#ifndef __STM32F4xx_HAL_CONF_H
+#define __STM32F4xx_HAL_CONF_H
+
+#ifdef __cplusplus
+ extern "C" {
+#endif
+
+/* Exported types ------------------------------------------------------------*/
+/* Exported constants --------------------------------------------------------*/
+
+/* ########################## Module Selection ############################## */
+/**
+  * @brief This is the list of modules to be used in the HAL driver
+  */
+#define HAL_MODULE_ENABLED
+//#define HAL_ADC_MODULE_ENABLED
+//#define HAL_CAN_MODULE_ENABLED
+//#define HAL_CRC_MODULE_ENABLED
+//#define HAL_CRYP_MODULE_ENABLED
+//#define HAL_DAC_MODULE_ENABLED
+//#define HAL_DCMI_MODULE_ENABLED
+//#define HAL_DMA2D_MODULE_ENABLED
+//#define HAL_ETH_MODULE_ENABLED
+//#define HAL_NAND_MODULE_ENABLED
+//#define HAL_NOR_MODULE_ENABLED
+//#define HAL_PCCARD_MODULE_ENABLED
+//#define HAL_SRAM_MODULE_ENABLED
+//#define HAL_SDRAM_MODULE_ENABLED
+//#define HAL_HASH_MODULE_ENABLED
+//#define HAL_I2C_MODULE_ENABLED
+//#define HAL_I2S_MODULE_ENABLED
+//#define HAL_IWDG_MODULE_ENABLED
+//#define HAL_LTDC_MODULE_ENABLED
+//#define HAL_RNG_MODULE_ENABLED
+//#define HAL_RTC_MODULE_ENABLED
+//#define HAL_SAI_MODULE_ENABLED
+//#define HAL_SD_MODULE_ENABLED
+//#define HAL_SPI_MODULE_ENABLED
+//#define HAL_TIM_MODULE_ENABLED
+#define HAL_UART_MODULE_ENABLED
+//#define HAL_USART_MODULE_ENABLED
+//#define HAL_IRDA_MODULE_ENABLED
+//#define HAL_SMARTCARD_MODULE_ENABLED
+//#define HAL_WWDG_MODULE_ENABLED
+//#define HAL_PCD_MODULE_ENABLED
+//#define HAL_HCD_MODULE_ENABLED
+#define HAL_GPIO_MODULE_ENABLED
+#define HAL_DMA_MODULE_ENABLED
+#define HAL_RCC_MODULE_ENABLED
+#define HAL_FLASH_MODULE_ENABLED
+#define HAL_PWR_MODULE_ENABLED
+#define HAL_CORTEX_MODULE_ENABLED
+
+/* ########################## HSE/HSI Values adaptation ##################### */
+/**
+  * @brief Adjust the value of External High Speed oscillator (HSE) used in your application.
+  *        This value is used by the RCC HAL module to compute the system frequency
+  *        (when HSE is used as system clock source, directly or through the PLL).
+  */
+#if !defined  (HSE_VALUE)
+  #define HSE_VALUE    ((uint32_t)25000000) /*!< Value of the External oscillator in Hz */
+#endif /* HSE_VALUE */
+
+#if !defined  (HSE_STARTUP_TIMEOUT)
+  #define HSE_STARTUP_TIMEOUT    ((uint32_t)5000)   /*!< Time out for HSE start up, in ms */
+#endif /* HSE_STARTUP_TIMEOUT */
+
+/**
+  * @brief Internal High Speed oscillator (HSI) value.
+  *        This value is used by the RCC HAL module to compute the system frequency
+  *        (when HSI is used as system clock source, directly or through the PLL).
+  */
+#if !defined  (HSI_VALUE)
+  #define HSI_VALUE    ((uint32_t)16000000) /*!< Value of the Internal oscillator in Hz*/
+#endif /* HSI_VALUE */
+
+/**
+  * @brief Internal Low Speed oscillator (LSI) value.
+  */
+#if !defined  (LSI_VALUE)
+ #define LSI_VALUE  ((uint32_t)40000)
+#endif /* LSI_VALUE */                      /*!< Value of the Internal Low Speed oscillator in Hz
+                                             The real value may vary depending on the variations
+                                             in voltage and temperature.  */
+/**
+  * @brief External Low Speed oscillator (LSE) value.
+  */
+#if !defined  (LSE_VALUE)
+ #define LSE_VALUE  ((uint32_t)32768)    /*!< Value of the External Low Speed oscillator in Hz */
+#endif /* LSE_VALUE */
+
+/**
+  * @brief External clock source for I2S peripheral
+  *        This value is used by the I2S HAL module to compute the I2S clock source
+  *        frequency, this source is inserted directly through I2S_CKIN pad.
+  */
+#if !defined  (EXTERNAL_CLOCK_VALUE)
+  #define EXTERNAL_CLOCK_VALUE    ((uint32_t)12288000) /*!< Value of the External audio frequency in Hz*/
+#endif /* EXTERNAL_CLOCK_VALUE */
+
+/* Tip: To avoid modifying this file each time you need to use different HSE,
+   ===  you can define the HSE value in your toolchain compiler preprocessor. */
+
+/* ########################### System Configuration ######################### */
+/**
+  * @brief This is the HAL system configuration section
+  */
+
+#define  VDD_VALUE					  ((uint32_t)3300) /*!< Value of VDD in mv */
+#define  TICK_INT_PRIORITY            ((uint32_t)0)    /*!< tick interrupt priority */
+#define  USE_RTOS                     0
+#define  PREFETCH_ENABLE              1
+#define  INSTRUCTION_CACHE_ENABLE     1
+#define  DATA_CACHE_ENABLE            1
+
+/* ########################## Assert Selection ############################## */
+/**
+  * @brief Uncomment the line below to expanse the "assert_param" macro in the
+  *        HAL drivers code
+  */
+/* #define USE_FULL_ASSERT    1 */
+
+/* ################## Ethernet peripheral configuration ##################### */
+
+/* Section 1 : Ethernet peripheral configuration */
+
+/* MAC ADDRESS: MAC_ADDR0:MAC_ADDR1:MAC_ADDR2:MAC_ADDR3:MAC_ADDR4:MAC_ADDR5 */
+#define MAC_ADDR0   2
+#define MAC_ADDR1   0
+#define MAC_ADDR2   0
+#define MAC_ADDR3   0
+#define MAC_ADDR4   0
+#define MAC_ADDR5   0
+
+/* Definition of the Ethernet driver buffers size and count */
+#define ETH_RX_BUF_SIZE                ETH_MAX_PACKET_SIZE /* buffer size for receive               */
+#define ETH_TX_BUF_SIZE                ETH_MAX_PACKET_SIZE /* buffer size for transmit              */
+#define ETH_RXBUFNB                    ((uint32_t)4)       /* 4 Rx buffers of size ETH_RX_BUF_SIZE  */
+#define ETH_TXBUFNB                    ((uint32_t)4)       /* 4 Tx buffers of size ETH_TX_BUF_SIZE  */
+
+/* Section 2: PHY configuration section */
+
+/* DP83848 PHY Address*/
+#define DP83848_PHY_ADDRESS             0x01
+/* PHY Reset delay these values are based on a 1 ms Systick interrupt*/
+#define PHY_RESET_DELAY                 ((uint32_t)0x000000FF)
+/* PHY Configuration delay */
+#define PHY_CONFIG_DELAY                ((uint32_t)0x00000FFF)
+
+#define PHY_READ_TO                     ((uint32_t)0x0000FFFF)
+#define PHY_WRITE_TO                    ((uint32_t)0x0000FFFF)
+
+/* Section 3: Common PHY Registers */
+
+#define PHY_BCR                         ((uint16_t)0x00)    /*!< Transceiver Basic Control Register   */
+#define PHY_BSR                         ((uint16_t)0x01)    /*!< Transceiver Basic Status Register    */
+
+#define PHY_RESET                       ((uint16_t)0x8000)  /*!< PHY Reset */
+#define PHY_LOOPBACK                    ((uint16_t)0x4000)  /*!< Select loop-back mode */
+#define PHY_FULLDUPLEX_100M             ((uint16_t)0x2100)  /*!< Set the full-duplex mode at 100 Mb/s */
+#define PHY_HALFDUPLEX_100M             ((uint16_t)0x2000)  /*!< Set the half-duplex mode at 100 Mb/s */
+#define PHY_FULLDUPLEX_10M              ((uint16_t)0x0100)  /*!< Set the full-duplex mode at 10 Mb/s  */
+#define PHY_HALFDUPLEX_10M              ((uint16_t)0x0000)  /*!< Set the half-duplex mode at 10 Mb/s  */
+#define PHY_AUTONEGOTIATION             ((uint16_t)0x1000)  /*!< Enable auto-negotiation function     */
+#define PHY_RESTART_AUTONEGOTIATION     ((uint16_t)0x0200)  /*!< Restart auto-negotiation function    */
+#define PHY_POWERDOWN                   ((uint16_t)0x0800)  /*!< Select the power down mode           */
+#define PHY_ISOLATE                     ((uint16_t)0x0400)  /*!< Isolate PHY from MII                 */
+
+#define PHY_AUTONEGO_COMPLETE           ((uint16_t)0x0020)  /*!< Auto-Negotiation process completed   */
+#define PHY_LINKED_STATUS               ((uint16_t)0x0004)  /*!< Valid link established               */
+#define PHY_JABBER_DETECTION            ((uint16_t)0x0002)  /*!< Jabber condition detected            */
+
+/* Section 4: Extended PHY Registers */
+
+#define PHY_SR                          ((uint16_t)0x10)    /*!< PHY status register Offset                      */
+#define PHY_MICR                        ((uint16_t)0x11)    /*!< MII Interrupt Control Register                  */
+#define PHY_MISR                        ((uint16_t)0x12)    /*!< MII Interrupt Status and Misc. Control Register */
+
+#define PHY_LINK_STATUS                 ((uint16_t)0x0001)  /*!< PHY Link mask                                   */
+#define PHY_SPEED_STATUS                ((uint16_t)0x0002)  /*!< PHY Speed mask                                  */
+#define PHY_DUPLEX_STATUS               ((uint16_t)0x0004)  /*!< PHY Duplex mask                                 */
+
+#define PHY_MICR_INT_EN                 ((uint16_t)0x0002)  /*!< PHY Enable interrupts                           */
+#define PHY_MICR_INT_OE                 ((uint16_t)0x0001)  /*!< PHY Enable output interrupt events              */
+
+#define PHY_MISR_LINK_INT_EN            ((uint16_t)0x0020)  /*!< Enable Interrupt on change of link status       */
+#define PHY_LINK_INTERRUPT              ((uint16_t)0x2000)  /*!< PHY link status interrupt mask                  */
+
+/* Includes ------------------------------------------------------------------*/
+/**
+  * @brief Include module's header file
+  */
+
+#ifdef HAL_RCC_MODULE_ENABLED
+  #include "stm32f4xx_hal_rcc.h"
+#endif /* HAL_RCC_MODULE_ENABLED */
+
+#ifdef HAL_GPIO_MODULE_ENABLED
+  #include "stm32f4xx_hal_gpio.h"
+#endif /* HAL_GPIO_MODULE_ENABLED */
+
+#ifdef HAL_DMA_MODULE_ENABLED
+  #include "stm32f4xx_hal_dma.h"
+#endif /* HAL_DMA_MODULE_ENABLED */
+
+#ifdef HAL_CORTEX_MODULE_ENABLED
+  #include "stm32f4xx_hal_cortex.h"
+#endif /* HAL_CORTEX_MODULE_ENABLED */
+
+#ifdef HAL_ADC_MODULE_ENABLED
+  #include "stm32f4xx_hal_adc.h"
+#endif /* HAL_ADC_MODULE_ENABLED */
+
+#ifdef HAL_CAN_MODULE_ENABLED
+  #include "stm32f4xx_hal_can.h"
+#endif /* HAL_CAN_MODULE_ENABLED */
+
+#ifdef HAL_CRC_MODULE_ENABLED
+  #include "stm32f4xx_hal_crc.h"
+#endif /* HAL_CRC_MODULE_ENABLED */
+
+#ifdef HAL_CRYP_MODULE_ENABLED
+  #include "stm32f4xx_hal_cryp.h"
+#endif /* HAL_CRYP_MODULE_ENABLED */
+
+#ifdef HAL_DMA2D_MODULE_ENABLED
+  #include "stm32f4xx_hal_dma2d.h"
+#endif /* HAL_DMA2D_MODULE_ENABLED */
+
+#ifdef HAL_DAC_MODULE_ENABLED
+  #include "stm32f4xx_hal_dac.h"
+#endif /* HAL_DAC_MODULE_ENABLED */
+
+#ifdef HAL_DCMI_MODULE_ENABLED
+  #include "stm32f4xx_hal_dcmi.h"
+#endif /* HAL_DCMI_MODULE_ENABLED */
+
+#ifdef HAL_ETH_MODULE_ENABLED
+  #include "stm32f4xx_hal_eth.h"
+#endif /* HAL_ETH_MODULE_ENABLED */
+
+#ifdef HAL_FLASH_MODULE_ENABLED
+  #include "stm32f4xx_hal_flash.h"
+#endif /* HAL_FLASH_MODULE_ENABLED */
+
+#ifdef HAL_SRAM_MODULE_ENABLED
+  #include "stm32f4xx_hal_sram.h"
+#endif /* HAL_SRAM_MODULE_ENABLED */
+
+#ifdef HAL_NOR_MODULE_ENABLED
+  #include "stm32f4xx_hal_nor.h"
+#endif /* HAL_NOR_MODULE_ENABLED */
+
+#ifdef HAL_NAND_MODULE_ENABLED
+  #include "stm32f4xx_hal_nand.h"
+#endif /* HAL_NAND_MODULE_ENABLED */
+
+#ifdef HAL_PCCARD_MODULE_ENABLED
+  #include "stm32f4xx_hal_pccard.h"
+#endif /* HAL_PCCARD_MODULE_ENABLED */
+
+#ifdef HAL_SDRAM_MODULE_ENABLED
+  #include "stm32f4xx_hal_sdram.h"
+#endif /* HAL_SDRAM_MODULE_ENABLED */
+
+#ifdef HAL_HASH_MODULE_ENABLED
+ #include "stm32f4xx_hal_hash.h"
+#endif /* HAL_HASH_MODULE_ENABLED */
+
+#ifdef HAL_I2C_MODULE_ENABLED
+ #include "stm32f4xx_hal_i2c.h"
+#endif /* HAL_I2C_MODULE_ENABLED */
+
+#ifdef HAL_I2S_MODULE_ENABLED
+ #include "stm32f4xx_hal_i2s.h"
+#endif /* HAL_I2S_MODULE_ENABLED */
+
+#ifdef HAL_IWDG_MODULE_ENABLED
+ #include "stm32f4xx_hal_iwdg.h"
+#endif /* HAL_IWDG_MODULE_ENABLED */
+
+#ifdef HAL_LTDC_MODULE_ENABLED
+ #include "stm32f4xx_hal_ltdc.h"
+#endif /* HAL_LTDC_MODULE_ENABLED */
+
+#ifdef HAL_PWR_MODULE_ENABLED
+ #include "stm32f4xx_hal_pwr.h"
+#endif /* HAL_PWR_MODULE_ENABLED */
+
+#ifdef HAL_RNG_MODULE_ENABLED
+ #include "stm32f4xx_hal_rng.h"
+#endif /* HAL_RNG_MODULE_ENABLED */
+
+#ifdef HAL_RTC_MODULE_ENABLED
+ #include "stm32f4xx_hal_rtc.h"
+#endif /* HAL_RTC_MODULE_ENABLED */
+
+#ifdef HAL_SAI_MODULE_ENABLED
+ #include "stm32f4xx_hal_sai.h"
+#endif /* HAL_SAI_MODULE_ENABLED */
+
+#ifdef HAL_SD_MODULE_ENABLED
+ #include "stm32f4xx_hal_sd.h"
+#endif /* HAL_SD_MODULE_ENABLED */
+
+#ifdef HAL_SPI_MODULE_ENABLED
+ #include "stm32f4xx_hal_spi.h"
+#endif /* HAL_SPI_MODULE_ENABLED */
+
+#ifdef HAL_TIM_MODULE_ENABLED
+ #include "stm32f4xx_hal_tim.h"
+#endif /* HAL_TIM_MODULE_ENABLED */
+
+#ifdef HAL_UART_MODULE_ENABLED
+ #include "stm32f4xx_hal_uart.h"
+#endif /* HAL_UART_MODULE_ENABLED */
+
+#ifdef HAL_USART_MODULE_ENABLED
+ #include "stm32f4xx_hal_usart.h"
+#endif /* HAL_USART_MODULE_ENABLED */
+
+#ifdef HAL_IRDA_MODULE_ENABLED
+ #include "stm32f4xx_hal_irda.h"
+#endif /* HAL_IRDA_MODULE_ENABLED */
+
+#ifdef HAL_SMARTCARD_MODULE_ENABLED
+ #include "stm32f4xx_hal_smartcard.h"
+#endif /* HAL_SMARTCARD_MODULE_ENABLED */
+
+#ifdef HAL_WWDG_MODULE_ENABLED
+ #include "stm32f4xx_hal_wwdg.h"
+#endif /* HAL_WWDG_MODULE_ENABLED */
+
+#ifdef HAL_PCD_MODULE_ENABLED
+ #include "stm32f4xx_hal_pcd.h"
+#endif /* HAL_PCD_MODULE_ENABLED */
+
+#ifdef HAL_HCD_MODULE_ENABLED
+ #include "stm32f4xx_hal_hcd.h"
+#endif /* HAL_HCD_MODULE_ENABLED */
+
+/* Exported macro ------------------------------------------------------------*/
+#ifdef  USE_FULL_ASSERT
+/**
+  * @brief  The assert_param macro is used for function's parameters check.
+  * @param  expr: If expr is false, it calls assert_failed function
+  *         which reports the name of the source file and the source
+  *         line number of the call that failed.
+  *         If expr is true, it returns no value.
+  * @retval None
+  */
+  #define assert_param(expr) ((expr) ? (void)0 : assert_failed((uint8_t *)__FILE__, __LINE__))
+/* Exported functions ------------------------------------------------------- */
+  void assert_failed(uint8_t* file, uint32_t line);
+#else
+  #define assert_param(expr) ((void)0)
+#endif /* USE_FULL_ASSERT */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __STM32F4xx_HAL_CONF_H */
+
+
+/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
diff --git a/src/short-test/include/stm32f4xx_it.h b/src/short-test/include/stm32f4xx_it.h
new file mode 100644
index 0000000..e5bfe85
--- /dev/null
+++ b/src/short-test/include/stm32f4xx_it.h
@@ -0,0 +1,57 @@
+/**
+  ******************************************************************************
+  * @file    stm32f4xx_it.h
+  * @date    08/07/2015 17:46:00
+  * @brief   This file contains the headers of the interrupt handlers.
+  ******************************************************************************
+  *
+  * COPYRIGHT(c) 2015 STMicroelectronics
+  *
+  * 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.
+  *
+  ******************************************************************************
+  */
+
+/* Define to prevent recursive inclusion -------------------------------------*/
+#ifndef __STM32F4xx_IT_H
+#define __STM32F4xx_IT_H
+
+#ifdef __cplusplus
+ extern "C" {
+#endif
+
+/* Includes ------------------------------------------------------------------*/
+/* Exported types ------------------------------------------------------------*/
+/* Exported constants --------------------------------------------------------*/
+/* Exported macro ------------------------------------------------------------*/
+/* Exported functions ------------------------------------------------------- */
+
+void SysTick_Handler(void);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __STM32F4xx_IT_H */
+
+/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
diff --git a/src/short-test/include/stm_init.h b/src/short-test/include/stm_init.h
new file mode 100644
index 0000000..946ac40
--- /dev/null
+++ b/src/short-test/include/stm_init.h
@@ -0,0 +1,18 @@
+#ifndef __STM_INIT_H
+#define __STM_INIT_H
+
+#include "stm32f4xx_hal.h"
+
+#define LED_PORT	GPIOJ
+#define LED_RED		GPIO_PIN_1
+#define LED_YELLOW	GPIO_PIN_2
+#define LED_GREEN	GPIO_PIN_3
+#define LED_BLUE	GPIO_PIN_4
+
+#define USART2_BAUD_RATE	115200
+
+extern UART_HandleTypeDef huart2;
+extern void stm_init(void);
+extern void Error_Handler(void);
+
+#endif /* __STM_INIT_H */
diff --git a/src/short-test/src/main.c b/src/short-test/src/main.c
new file mode 100644
index 0000000..6e944c9
--- /dev/null
+++ b/src/short-test/src/main.c
@@ -0,0 +1,270 @@
+/*
+ * Test code that just sends the letters 'a' to 'z' over and
+ * over again using USART2.
+ *
+ * Toggles the BLUE LED slowly and the RED LED for every
+ * character sent.
+ */
+#include "stm_init.h"
+
+void test_for_shorts(char port, GPIO_TypeDef* GPIOx, uint16_t GPIO_Test_Pins);
+void uart_send_binary(uint32_t num, uint8_t bits);
+
+//------------------------------------------------------------------------------
+// Defines
+//------------------------------------------------------------------------------
+#define GPIO_PORT_LEDS        GPIOJ
+
+#define GPIO_PIN_LED_RED      GPIO_PIN_1
+#define GPIO_PIN_LED_YELLOW   GPIO_PIN_2
+#define GPIO_PIN_LED_GREEN    GPIO_PIN_3
+#define GPIO_PIN_LED_BLUE     GPIO_PIN_4
+
+#define DELAY() HAL_Delay(100)
+
+#define DEBUG_ADJACENT 0
+
+//------------------------------------------------------------------------------
+// Macros
+//------------------------------------------------------------------------------
+#define led_on(pin)	HAL_GPIO_WritePin(GPIO_PORT_LEDS, pin, GPIO_PIN_SET)
+#define led_off(pin)	HAL_GPIO_WritePin(GPIO_PORT_LEDS, pin, GPIO_PIN_RESET)
+#define led_toggle(pin)	HAL_GPIO_TogglePin(GPIO_PORT_LEDS, pin)
+
+
+/* These are all the pins used by the FMC interface */
+#define GPIOB_PINS  (GPIO_PIN_7)
+
+#define GPIOD_PINS  (GPIO_PIN_8|GPIO_PIN_9|GPIO_PIN_10|GPIO_PIN_11	\
+		     |GPIO_PIN_12|GPIO_PIN_13|GPIO_PIN_14|GPIO_PIN_15	\
+		     |GPIO_PIN_0|GPIO_PIN_1|GPIO_PIN_3|GPIO_PIN_4	\
+		     |GPIO_PIN_5|GPIO_PIN_6|GPIO_PIN_7)
+
+#define GPIOE_PINS  (GPIO_PIN_3|GPIO_PIN_4|GPIO_PIN_5|GPIO_PIN_7	\
+		     |GPIO_PIN_8|GPIO_PIN_9|GPIO_PIN_10|GPIO_PIN_11	\
+		     |GPIO_PIN_12|GPIO_PIN_13|GPIO_PIN_14|GPIO_PIN_15)
+
+#define GPIOF_PINS  (GPIO_PIN_0|GPIO_PIN_1|GPIO_PIN_2|GPIO_PIN_3	\
+		     |GPIO_PIN_4|GPIO_PIN_5|GPIO_PIN_12|GPIO_PIN_13	\
+		     |GPIO_PIN_14|GPIO_PIN_15)
+
+#define GPIOG_PINS  (GPIO_PIN_0|GPIO_PIN_1|GPIO_PIN_2|GPIO_PIN_3	\
+		     |GPIO_PIN_4|GPIO_PIN_5)
+
+#define GPIOH_PINS  (GPIO_PIN_8|GPIO_PIN_9|GPIO_PIN_10|GPIO_PIN_11	\
+		     |GPIO_PIN_12|GPIO_PIN_13|GPIO_PIN_14|GPIO_PIN_15)
+
+#define GPIOI_PINS  (GPIO_PIN_9|GPIO_PIN_10|GPIO_PIN_0|GPIO_PIN_1	\
+		     |GPIO_PIN_2|GPIO_PIN_3|GPIO_PIN_6|GPIO_PIN_7)
+
+int
+main()
+{
+  GPIO_InitTypeDef GPIO_InitStruct;
+
+  stm_init();
+
+  // enable gpio clocks
+  __GPIOA_CLK_ENABLE();
+  __GPIOB_CLK_ENABLE();
+  __GPIOD_CLK_ENABLE();
+  __GPIOE_CLK_ENABLE();
+  __GPIOF_CLK_ENABLE();
+  __GPIOG_CLK_ENABLE();
+  __GPIOH_CLK_ENABLE();
+  __GPIOI_CLK_ENABLE();
+
+  configure_all_as_input(GPIOB, GPIOB_PINS);
+  configure_all_as_input(GPIOD, GPIOD_PINS);
+  configure_all_as_input(GPIOE, GPIOE_PINS);
+  configure_all_as_input(GPIOF, GPIOF_PINS);
+  configure_all_as_input(GPIOG, GPIOG_PINS);
+  configure_all_as_input(GPIOH, GPIOH_PINS);
+  configure_all_as_input(GPIOI, GPIOI_PINS);
+
+  /* Change one pin to output */
+  GPIO_InitStruct.Pin = GPIO_PIN_12 | GPIO_PIN_11;
+  GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
+  GPIO_InitStruct.Pull = GPIO_PULLUP;
+  GPIO_InitStruct.Speed = GPIO_SPEED_HIGH;
+  HAL_GPIO_Init(GPIOD, &GPIO_InitStruct);
+
+  while (1) {
+    HAL_GPIO_WritePin(GPIOD, GPIO_PIN_11, GPIO_PIN_SET);
+    HAL_GPIO_WritePin(GPIOD, GPIO_PIN_12, GPIO_PIN_SET);
+    HAL_GPIO_WritePin(GPIOD, GPIO_PIN_11, GPIO_PIN_RESET);
+    HAL_GPIO_WritePin(GPIOD, GPIO_PIN_12, GPIO_PIN_RESET);
+  }
+
+  while (1) {
+    HAL_GPIO_TogglePin(LED_PORT, LED_GREEN);
+    HAL_UART_Transmit(&huart2, (uint8_t *) "\r\n\r\n\r\n\r\n\r\n", 10, 0x1);
+
+    test_for_shorts('B', GPIOB, GPIOB_PINS);
+    test_for_shorts('D', GPIOD, GPIOD_PINS);
+    test_for_shorts('E', GPIOE, GPIOE_PINS);
+    test_for_shorts('F', GPIOF, GPIOF_PINS);
+    test_for_shorts('G', GPIOG, GPIOG_PINS);
+    test_for_shorts('H', GPIOH, GPIOH_PINS);
+    test_for_shorts('I', GPIOI, GPIOI_PINS);
+
+    led_toggle(LED_BLUE);
+    HAL_Delay(2000);
+  }
+}
+
+void configure_all_as_input(GPIO_TypeDef* GPIOx, uint16_t GPIO_Test_Pins)
+{
+  GPIO_InitTypeDef GPIO_InitStruct;
+
+  /* Configure all pins as input. XXX do all pins (0xffff) instead of just GPIO_Test_Pins? */
+  GPIO_InitStruct.Pin = GPIO_Test_Pins;
+  //GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
+  GPIO_InitStruct.Mode = GPIO_MODE_INPUT;  /* XXX does GPIO_PULLDOWN work with GPIO_MODE_INPUT? */
+  GPIO_InitStruct.Pull = GPIO_PULLDOWN;
+  GPIO_InitStruct.Speed = GPIO_SPEED_LOW;
+  HAL_GPIO_Init(GPIOx, &GPIO_InitStruct);
+}
+
+uint8_t check_no_input(char port, GPIO_TypeDef* GPIOx, uint16_t GPIO_Test_Pins, char wrote_port, uint16_t wrote_value)
+{
+  uint16_t read;
+
+  /* Read all pins from port at once. XXX check all pins, not just GPIO_Test_Pins? */
+  read = (GPIOx->IDR & GPIO_Test_Pins);
+
+  if (DEBUG_ADJACENT && port == 'H' && wrote_port == 'I' && wrote_value < 4) {
+    HAL_UART_Transmit(&huart2, (uint8_t *) "DEBUG R GPIOH ", 14, 0x1);
+    uart_send_binary(GPIO_Test_Pins, 16);
+    HAL_UART_Transmit(&huart2, (uint8_t *) " -> ", 4, 0x1);
+    uart_send_binary(read, 16);
+    HAL_UART_Transmit(&huart2, (uint8_t *) "\r\n", 2, 0x1);
+  }
+
+  if (! read) {
+    /* No unexpected pins read as HIGH */
+    return 0;
+  }
+
+  led_on(LED_RED);
+
+  HAL_UART_Transmit(&huart2, (uint8_t *) "Wrote ", 6, 0x1);
+  uart_send_binary(wrote_value, 16);
+
+  HAL_UART_Transmit(&huart2, (uint8_t *) " to port GPIO", 13, 0x1);
+  HAL_UART_Transmit(&huart2, (uint8_t *) &wrote_port, 1, 0x1);
+
+  HAL_UART_Transmit(&huart2, (uint8_t *) ", read ", 7, 0x1);
+  uart_send_binary(read, 16);
+
+  HAL_UART_Transmit(&huart2, (uint8_t *) " from GPIO", 10, 0x1);
+  HAL_UART_Transmit(&huart2, (uint8_t *) &port, 1, 0x1);
+
+  HAL_UART_Transmit(&huart2, (uint8_t *) "\r\n", 2, 0x1);
+
+  return 1;
+}
+
+void test_for_shorts(char port, GPIO_TypeDef* GPIOx, uint16_t GPIO_Test_Pins)
+{
+  GPIO_InitTypeDef GPIO_InitStruct;
+  uint16_t i, fail = 0, Test_Pin, read;
+
+  configure_all_as_input(GPIOB, GPIOB_PINS);
+  configure_all_as_input(GPIOD, GPIOD_PINS);
+  configure_all_as_input(GPIOE, GPIOE_PINS);
+  configure_all_as_input(GPIOF, GPIOF_PINS);
+  configure_all_as_input(GPIOG, GPIOG_PINS);
+  configure_all_as_input(GPIOH, GPIOH_PINS);
+  configure_all_as_input(GPIOI, GPIOI_PINS);
+
+  check_no_input('B', GPIOB, GPIOB_PINS, 'x', 0);
+  check_no_input('D', GPIOD, GPIOD_PINS, 'x', 0);
+  check_no_input('E', GPIOE, GPIOE_PINS, 'x', 0);
+  check_no_input('F', GPIOF, GPIOF_PINS, 'x', 0);
+  check_no_input('G', GPIOG, GPIOG_PINS, 'x', 0);
+  check_no_input('H', GPIOH, GPIOH_PINS, 'x', 0);
+  check_no_input('I', GPIOI, GPIOI_PINS, 'x', 0);
+
+  for (i = 0; i < 31; i++) {
+    Test_Pin = 1 << i;
+    if (! (GPIO_Test_Pins & Test_Pin)) continue;
+
+    configure_all_as_input(GPIOx, GPIO_Test_Pins);
+
+    /* Change one pin to output */
+    GPIO_InitStruct.Pin = Test_Pin;
+    GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
+    GPIO_InitStruct.Pull = GPIO_PULLDOWN;
+    GPIO_InitStruct.Speed = GPIO_SPEED_LOW;
+    HAL_GPIO_Init(GPIOx, &GPIO_InitStruct);
+
+    HAL_GPIO_WritePin(GPIOx, Test_Pin, GPIO_PIN_SET);
+
+    /* Read all pins from port at once. XXX check all pins, not just GPIO_Test_Pins? */
+    read = GPIOx->IDR & GPIO_Test_Pins;
+
+    if (DEBUG_ADJACENT && port == 'I' && Test_Pin < 4) {
+      HAL_UART_Transmit(&huart2, (uint8_t *) "DEBUG W GPIOI ", 14, 0x1);
+      uart_send_binary(Test_Pin, 16);
+      HAL_UART_Transmit(&huart2, (uint8_t *) " -> ", 4, 0x1);
+      uart_send_binary(read, 16);
+      HAL_UART_Transmit(&huart2, (uint8_t *) "\r\n", 2, 0x1);
+    }
+
+    if (read == Test_Pin) {
+      /* No unexpected pins read as HIGH */
+      led_toggle(LED_GREEN);
+    } else {
+      led_on(LED_RED);
+      HAL_UART_Transmit(&huart2, (uint8_t *) "GPIO", 4, 0x1);
+      HAL_UART_Transmit(&huart2, (uint8_t *) &port, 1, 0x1);
+
+      HAL_UART_Transmit(&huart2, (uint8_t *) " exp ", 5, 0x1);
+      uart_send_binary(Test_Pin, 16);
+
+      HAL_UART_Transmit(&huart2, (uint8_t *) " got ", 5, 0x1);
+      uart_send_binary(read, 16);
+
+      HAL_UART_Transmit(&huart2, (uint8_t *) " diff ", 6, 0x1);
+      uart_send_binary(read ^ Test_Pin, 16);
+
+      HAL_UART_Transmit(&huart2, (uint8_t *) "\r\n", 2, 0x1);
+
+      fail++;
+    }
+
+    /* Check there is no input on any of the other GPIO ports (adjacent pins might live on different ports) */
+    if (port != 'B') fail += check_no_input('B', GPIOB, GPIOB_PINS, port, Test_Pin);
+    if (port != 'D') fail += check_no_input('D', GPIOD, GPIOD_PINS, port, Test_Pin);
+    if (port != 'E') fail += check_no_input('E', GPIOE, GPIOE_PINS, port, Test_Pin);
+    if (port != 'F') fail += check_no_input('F', GPIOF, GPIOF_PINS, port, Test_Pin);
+    if (port != 'G') fail += check_no_input('G', GPIOG, GPIOG_PINS, port, Test_Pin);
+    if (port != 'H') fail += check_no_input('H', GPIOH, GPIOH_PINS, port, Test_Pin);
+    if (port != 'I') fail += check_no_input('I', GPIOI, GPIOI_PINS, port, Test_Pin);
+
+    HAL_GPIO_WritePin(GPIOx, Test_Pin, GPIO_PIN_RESET);
+  }
+
+  if (fail) {
+    HAL_UART_Transmit(&huart2, (uint8_t *) "\r\n", 2, 0x1);
+  }
+}
+
+void uart_send_binary(uint32_t num, uint8_t bits) {
+  uint32_t i;
+  unsigned char ch;
+
+  bits--;  /* bits 4 should give i = 1000, not 10000 */
+
+  i = 1 << bits;
+  while (i) {
+    ch = '0';
+    if (num & i) {
+      ch = '1';
+    }
+
+    HAL_UART_Transmit(&huart2, (uint8_t *) &ch, 1, 0x1);
+    i = i >> 1;
+  }
+}
diff --git a/src/short-test/src/stm32f4xx_hal_msp.c b/src/short-test/src/stm32f4xx_hal_msp.c
new file mode 100644
index 0000000..6bf0b9d
--- /dev/null
+++ b/src/short-test/src/stm32f4xx_hal_msp.c
@@ -0,0 +1,77 @@
+/**
+******************************************************************************
+* File Name          : stm32f4xx_hal_msp.c
+* Date               : 08/07/2015 17:46:00
+* Description        : This file provides code for the MSP Initialization
+*                      and de-Initialization codes.
+******************************************************************************
+*
+* COPYRIGHT(c) 2015 STMicroelectronics
+*
+* 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.
+*
+******************************************************************************
+*/
+/* Includes ------------------------------------------------------------------*/
+#include "stm32f4xx_hal.h"
+#include "stm_init.h"
+
+void HAL_UART_MspInit(UART_HandleTypeDef* huart)
+{
+  GPIO_InitTypeDef GPIO_InitStruct;
+  int i;
+
+  if (huart->Instance == USART2) {
+    /* Peripheral clock enable */
+    __USART2_CLK_ENABLE();
+    __GPIOA_CLK_ENABLE();
+
+    /**USART2 GPIO Configuration
+       PA2     ------> USART2_TX
+       PA3     ------> USART2_RX
+    */
+    GPIO_InitStruct.Pin = GPIO_PIN_2 | GPIO_PIN_3;
+    GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
+    GPIO_InitStruct.Pull = GPIO_PULLUP;
+    GPIO_InitStruct.Speed = GPIO_SPEED_LOW;
+    GPIO_InitStruct.Alternate = GPIO_AF7_USART2;
+    HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
+  }
+
+}
+
+void HAL_UART_MspDeInit(UART_HandleTypeDef* huart)
+{
+  if (huart->Instance == USART2) {
+    /* Peripheral clock disable */
+    __USART2_CLK_DISABLE();
+
+    /**USART2 GPIO Configuration
+       PA2     ------> USART2_TX
+       PA3     ------> USART2_RX
+    */
+    HAL_GPIO_DeInit(GPIOA, GPIO_PIN_2 | GPIO_PIN_3);
+  }
+}
+
+/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
diff --git a/src/short-test/src/stm32f4xx_it.c b/src/short-test/src/stm32f4xx_it.c
new file mode 100644
index 0000000..b816d0d
--- /dev/null
+++ b/src/short-test/src/stm32f4xx_it.c
@@ -0,0 +1,54 @@
+/**
+  ******************************************************************************
+  * @file    stm32f4xx_it.c
+  * @date    08/07/2015 17:45:59
+  * @brief   Interrupt Service Routines.
+  ******************************************************************************
+  *
+  * COPYRIGHT(c) 2015 STMicroelectronics
+  *
+  * 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.
+  *
+  ******************************************************************************
+  */
+/* Includes ------------------------------------------------------------------*/
+#include "stm32f4xx_hal.h"
+#include "stm32f4xx.h"
+#include "stm32f4xx_it.h"
+
+/* External variables --------------------------------------------------------*/
+
+/******************************************************************************/
+/*            Cortex-M4 Processor Interruption and Exception Handlers         */
+/******************************************************************************/
+
+/**
+* @brief This function handles System tick timer.
+*/
+void SysTick_Handler(void)
+{
+  HAL_IncTick();
+  HAL_SYSTICK_IRQHandler();
+}
+
+/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
diff --git a/src/short-test/src/stm_init.c b/src/short-test/src/stm_init.c
new file mode 100644
index 0000000..b6edf3f
--- /dev/null
+++ b/src/short-test/src/stm_init.c
@@ -0,0 +1,202 @@
+/**
+  ******************************************************************************
+  * File Name          : main.c
+  * Date               : 08/07/2015 17:46:00
+  * Description        : Main program body
+  ******************************************************************************
+  *
+  * COPYRIGHT(c) 2015 STMicroelectronics
+  *
+  * 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.
+  *
+  ******************************************************************************
+  */
+
+/* Includes ------------------------------------------------------------------*/
+#include "stm_init.h"
+#include "stm32f4xx_hal.h"
+
+UART_HandleTypeDef huart2;
+
+/* Private variables ---------------------------------------------------------*/
+static GPIO_InitTypeDef  GPIO_InitStruct;
+
+/* Private function prototypes -----------------------------------------------*/
+void SystemClock_Config(void);
+static void MX_GPIO_Init(void);
+static void MX_USART2_UART_Init(void);
+
+void stm_init(void)
+{
+
+  /* MCU Configuration----------------------------------------------------------*/
+
+  /* Reset of all peripherals, Initializes the Flash interface and the Systick. */
+  HAL_Init();
+
+  /* Configure the system clock */
+  SystemClock_Config();
+
+  /* System interrupt init*/
+  /* Sets the priority grouping field */
+  HAL_NVIC_SetPriorityGrouping(NVIC_PRIORITYGROUP_0);
+  HAL_NVIC_SetPriority(SysTick_IRQn, 0, 0);
+
+  /* Initialize all configured peripherals */
+  MX_GPIO_Init();
+  MX_USART2_UART_Init();
+}
+
+/** System Clock Configuration
+ *
+ * HSE crystal at 25 MHz, end result is 180 MHz clock.
+ */
+void SystemClock_Config(void)
+{
+  RCC_ClkInitTypeDef RCC_ClkInitStruct;
+  RCC_OscInitTypeDef RCC_OscInitStruct;
+
+  __PWR_CLK_ENABLE();
+
+  __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);
+
+  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
+  RCC_OscInitStruct.HSEState = RCC_HSE_ON;
+  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
+  RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
+  RCC_OscInitStruct.PLL.PLLM = 25;
+  RCC_OscInitStruct.PLL.PLLN = 360;
+  RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
+  RCC_OscInitStruct.PLL.PLLQ = 4;
+  HAL_RCC_OscConfig(&RCC_OscInitStruct);
+
+  HAL_PWREx_ActivateOverDrive();
+
+  RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2;
+  RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
+  RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
+  RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV4;
+  RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV2;
+  HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_5);
+}
+
+/** System Clock Configuration
+ *
+ * HSI source, end result is 16 MHz SYSCLK
+ *
+*/
+void old_SystemClock_Config(void)
+{
+
+  RCC_OscInitTypeDef RCC_OscInitStruct;
+
+  __PWR_CLK_ENABLE();
+
+  __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE3);
+
+  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;
+  RCC_OscInitStruct.HSIState = RCC_HSI_ON;
+  RCC_OscInitStruct.HSICalibrationValue = 6;
+  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
+  HAL_RCC_OscConfig(&RCC_OscInitStruct);
+
+}
+
+/* USART2 init function */
+void MX_USART2_UART_Init(void)
+{
+  huart2.Instance = USART2;
+  huart2.Init.BaudRate = USART2_BAUD_RATE;
+  huart2.Init.WordLength = UART_WORDLENGTH_8B;
+  huart2.Init.StopBits = UART_STOPBITS_1;
+  huart2.Init.Parity = UART_PARITY_NONE;
+  huart2.Init.Mode = UART_MODE_TX_RX;
+  huart2.Init.HwFlowCtl = UART_HWCONTROL_NONE;
+  huart2.Init.OverSampling = UART_OVERSAMPLING_16;
+
+  if (HAL_UART_Init(&huart2) != HAL_OK) {
+    /* Initialization Error */
+    Error_Handler();
+  }
+}
+
+/** Configure pins as
+        * Analog
+        * Input
+        * Output
+        * EVENT_OUT
+        * EXTI
+*/
+void MX_GPIO_Init(void)
+{
+  /* GPIO Ports Clock Enable */
+  __GPIOJ_CLK_ENABLE();
+
+  /* Configure LED GPIO pins PJ1==red, PJ2==yellow, PJ3==green, PJ4==blue */
+  GPIO_InitStruct.Pin = LED_RED | LED_YELLOW | LED_GREEN | LED_BLUE;
+  GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
+  GPIO_InitStruct.Pull = GPIO_NOPULL;
+  GPIO_InitStruct.Speed = GPIO_SPEED_LOW;
+  HAL_GPIO_Init(LED_PORT, &GPIO_InitStruct);
+}
+
+/**
+ * @brief  This function is executed in case of error occurrence.
+ * @param  None
+ * @retval None
+ */
+void Error_Handler(void)
+{
+  HAL_GPIO_WritePin(LED_PORT, LED_RED, GPIO_PIN_SET);
+  while (1) { ; }
+}
+
+#ifdef USE_FULL_ASSERT
+
+/**
+   * @brief Reports the name of the source file and the source line number
+   * where the assert_param error has occurred.
+   * @param file: pointer to the source file name
+   * @param line: assert_param error line source number
+   * @retval None
+   */
+void assert_failed(uint8_t* file, uint32_t line)
+{
+  /* USER CODE BEGIN 6 */
+  /* User can add his own implementation to report the file name and line number,
+    ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
+  /* USER CODE END 6 */
+
+}
+
+#endif
+
+/**
+  * @}
+  */
+
+/**
+  * @}
+*/
+
+/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/