Lots of cleanup.

Clean up and simplify(?) Makefile.
Add copyrights as needed.
Add include guard to stm-fmc.h.
Move MX_USART2_UART_Init back to stm-init.c for possible copyright reasons.
Move libc, src, and include files to top level.

5 files changed, 0 insertions, 806 deletions

diff --git a/src/stm-fmc.c b/src/stm-fmc.c
deleted file mode 100644
index 19b7fdc..0000000
--- a/src/stm-fmc.c
+++ /dev/null
@@ -1,325 +0,0 @@
-//------------------------------------------------------------------------------
-// stm-fmc.c
-//------------------------------------------------------------------------------
-
-
-//------------------------------------------------------------------------------
-// Headers
-//------------------------------------------------------------------------------
-#include "stm-fmc.h"
-#include "stm32f4xx_hal.h"
-
-
-//------------------------------------------------------------------------------
-// Defined Values
-//------------------------------------------------------------------------------
-#define FMC_FPGA_BASE_ADDR              0x60000000
-#define FMC_FPGA_ADDR_MASK              0x00FFFFFC
-#define FMC_FPGA_NWAIT_MAX_POLL_TICKS   10
-
-#define FMC_GPIO_PORT_NWAIT             GPIOD
-#define FMC_GPIO_PIN_NWAIT              GPIO_PIN_6
-
-#define FMC_NWAIT_IDLE                  GPIO_PIN_SET
-
-
-//------------------------------------------------------------------------------
-// Variables
-//------------------------------------------------------------------------------
-static SRAM_HandleTypeDef _fmc_fpga_inst;
-
-
-//------------------------------------------------------------------------------
-// Prototypes
-//------------------------------------------------------------------------------
-static void _fmc_init_gpio(void);
-static void _fmc_init_params(void);
-static int _fmc_nwait_idle(void);
-
-
-//------------------------------------------------------------------------------
-void fmc_init(void)
-//------------------------------------------------------------------------------
-{
-  // configure fmc pins
-  _fmc_init_gpio();
-
-  // configure fmc registers
-  _fmc_init_params();
-}
-
-
-//------------------------------------------------------------------------------
-int fmc_write_32(uint32_t addr, uint32_t *data)
-//------------------------------------------------------------------------------
-{
-  // calculate target fpga address
-  uint32_t ptr = FMC_FPGA_BASE_ADDR + (addr & FMC_FPGA_ADDR_MASK);
-
-  // write data to fpga
-  HAL_StatusTypeDef ok = HAL_SRAM_Write_32b(&_fmc_fpga_inst, (uint32_t *)ptr, data, 1);
-
-  // check for error
-  if (ok != HAL_OK) return -1;
-
-  // wait for transaction to complete
-  int wait = _fmc_nwait_idle();
-
-  // check for timeout
-  if (wait != 0) return -1;
-
-  // everything went ok
-  return 0;
-}
-
-
-//------------------------------------------------------------------------------
-int fmc_read_32(uint32_t addr, uint32_t *data)
-//------------------------------------------------------------------------------
-{
-  // calculate target fpga address
-  uint32_t ptr = FMC_FPGA_BASE_ADDR + (addr & FMC_FPGA_ADDR_MASK);
-
-  // perform dummy read transaction
-  HAL_StatusTypeDef ok = HAL_SRAM_Read_32b(&_fmc_fpga_inst, (uint32_t *)ptr, data, 1);
-
-  // check for error
-  if (ok != HAL_OK) return -1;
-
-  // wait for dummy transaction to complete
-  int wait = _fmc_nwait_idle();
-
-  // check for timeout
-  if (wait != 0) return -1;
-
-  // read data from fpga
-  ok = HAL_SRAM_Read_32b(&_fmc_fpga_inst, (uint32_t *)ptr, data, 1);
-
-  // check for error
-  if (ok != HAL_OK) return -1;
-
-  // wait for read transaction to complete
-  wait = _fmc_nwait_idle();
-
-  // check for timeout
-  if (wait != 0) return -1;
-
-  // everything went ok
-  return 0;
-}
-
-
-//------------------------------------------------------------------------------
-static int _fmc_nwait_idle()
-//------------------------------------------------------------------------------
-{
-  int cnt; // counter
-
-  // poll NWAIT (number of iterations is limited)
-  for (cnt=0; cnt<FMC_FPGA_NWAIT_MAX_POLL_TICKS; cnt++)
-    {
-      // read pin state
-      GPIO_PinState nwait = HAL_GPIO_ReadPin(FMC_GPIO_PORT_NWAIT, FMC_GPIO_PIN_NWAIT);
-
-      // stop waiting if fpga is ready
-      if (nwait == FMC_NWAIT_IDLE) break;
-    }
-
-  // check for timeout
-  if (cnt >= FMC_FPGA_NWAIT_MAX_POLL_TICKS) return -1;
-
-  // ok
-  return 0;
-}
-
-//------------------------------------------------------------------------------
-static void _fmc_init_gpio(void)
-//------------------------------------------------------------------------------
-{
-  // 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();
-
-  // enable fmc clock
-  __FMC_CLK_ENABLE();
-
-  // structure
-  GPIO_InitTypeDef GPIO_InitStruct;
-
-  // Port B
-  GPIO_InitStruct.Pin = GPIO_PIN_7;
-  GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
-  GPIO_InitStruct.Pull = GPIO_NOPULL;
-  GPIO_InitStruct.Speed = GPIO_SPEED_HIGH;
-  GPIO_InitStruct.Alternate = GPIO_AF12_FMC;
-  HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
-
-  // Port D
-  GPIO_InitStruct.Pin = 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_7;
-  GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
-  GPIO_InitStruct.Pull = GPIO_NOPULL;
-  GPIO_InitStruct.Speed = GPIO_SPEED_HIGH;
-  GPIO_InitStruct.Alternate = GPIO_AF12_FMC;
-  HAL_GPIO_Init(GPIOD, &GPIO_InitStruct);
-
-  /*
-   * When FMC is working with fixed latency, NWAIT pin must not be
-   * configured in AF mode, according to STM32F429 errata.
-   */
-
-  // Port D (GPIO!)
-  GPIO_InitStruct.Pin = GPIO_PIN_6;
-  GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
-  GPIO_InitStruct.Pull = GPIO_PULLUP;
-  HAL_GPIO_Init(GPIOD, &GPIO_InitStruct);
-
-  // Port E
-  GPIO_InitStruct.Pin = 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;
-  GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
-  GPIO_InitStruct.Pull = GPIO_NOPULL;
-  GPIO_InitStruct.Speed = GPIO_SPEED_HIGH;
-  GPIO_InitStruct.Alternate = GPIO_AF12_FMC;
-  HAL_GPIO_Init(GPIOE, &GPIO_InitStruct);
-
-  // Port F
-  GPIO_InitStruct.Pin = 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;
-  GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
-  GPIO_InitStruct.Pull = GPIO_NOPULL;
-  GPIO_InitStruct.Speed = GPIO_SPEED_HIGH;
-  GPIO_InitStruct.Alternate = GPIO_AF12_FMC;
-  HAL_GPIO_Init(GPIOF, &GPIO_InitStruct);
-
-  // Port G
-  GPIO_InitStruct.Pin = GPIO_PIN_0|GPIO_PIN_1|GPIO_PIN_2|GPIO_PIN_3
-    |GPIO_PIN_4|GPIO_PIN_5;
-  GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
-  GPIO_InitStruct.Pull = GPIO_NOPULL;
-  GPIO_InitStruct.Speed = GPIO_SPEED_HIGH;
-  GPIO_InitStruct.Alternate = GPIO_AF12_FMC;
-  HAL_GPIO_Init(GPIOG, &GPIO_InitStruct);
-
-  // Port H
-  GPIO_InitStruct.Pin = 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_InitStruct.Mode = GPIO_MODE_AF_PP;
-  GPIO_InitStruct.Pull = GPIO_NOPULL;
-  GPIO_InitStruct.Speed = GPIO_SPEED_HIGH;
-  GPIO_InitStruct.Alternate = GPIO_AF12_FMC;
-  HAL_GPIO_Init(GPIOH, &GPIO_InitStruct);
-
-  // Port I
-  GPIO_InitStruct.Pin = GPIO_PIN_9|GPIO_PIN_10|GPIO_PIN_0|GPIO_PIN_1
-    |GPIO_PIN_2|GPIO_PIN_3|GPIO_PIN_6|GPIO_PIN_7;
-  GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
-  GPIO_InitStruct.Pull = GPIO_NOPULL;
-  GPIO_InitStruct.Speed = GPIO_SPEED_HIGH;
-  GPIO_InitStruct.Alternate = GPIO_AF12_FMC;
-  HAL_GPIO_Init(GPIOI, &GPIO_InitStruct);
-}
-
-
-//------------------------------------------------------------------------------
-static void _fmc_init_params(void)
-//------------------------------------------------------------------------------
-{
-  /*
-   * fill internal fields
-   */
-  _fmc_fpga_inst.Instance = FMC_NORSRAM_DEVICE;
-  _fmc_fpga_inst.Extended = FMC_NORSRAM_EXTENDED_DEVICE;
-
-
-  /*
-   * configure fmc interface settings
-   */
-
-  // use the first bank and corresponding chip select
-  _fmc_fpga_inst.Init.NSBank = FMC_NORSRAM_BANK1;
-
-  // data and address buses are separate
-  _fmc_fpga_inst.Init.DataAddressMux = FMC_DATA_ADDRESS_MUX_DISABLE;
-
-  // fpga mimics psram-type memory
-  _fmc_fpga_inst.Init.MemoryType = FMC_MEMORY_TYPE_PSRAM;
-
-  // data bus is 32-bit
-  _fmc_fpga_inst.Init.MemoryDataWidth = FMC_NORSRAM_MEM_BUS_WIDTH_32;
-
-  // read transaction is sync
-  _fmc_fpga_inst.Init.BurstAccessMode = FMC_BURST_ACCESS_MODE_ENABLE;
-
-  // this _must_ be configured to high, according to errata, otherwise
-  // the processor may hang after trying to access fpga via fmc
-  _fmc_fpga_inst.Init.WaitSignalPolarity = FMC_WAIT_SIGNAL_POLARITY_HIGH;
-
-  // wrap mode is not supported
-  _fmc_fpga_inst.Init.WrapMode = FMC_WRAP_MODE_DISABLE;
-
-  // don't care in fixed latency mode
-  _fmc_fpga_inst.Init.WaitSignalActive = FMC_WAIT_TIMING_DURING_WS;
-
-  // allow write access to fpga
-  _fmc_fpga_inst.Init.WriteOperation = FMC_WRITE_OPERATION_ENABLE;
-
-  // use fixed latency mode (ignore wait signal)
-  _fmc_fpga_inst.Init.WaitSignal = FMC_WAIT_SIGNAL_DISABLE;
-
-  // write and read have same timing
-  _fmc_fpga_inst.Init.ExtendedMode = FMC_EXTENDED_MODE_DISABLE;
-
-  // don't care in sync mode
-  _fmc_fpga_inst.Init.AsynchronousWait = FMC_ASYNCHRONOUS_WAIT_DISABLE;
-
-  // write transaction is sync
-  _fmc_fpga_inst.Init.WriteBurst = FMC_WRITE_BURST_ENABLE;
-
-  // keep clock always active
-  _fmc_fpga_inst.Init.ContinuousClock = FMC_CONTINUOUS_CLOCK_SYNC_ASYNC;
-
-  /*
-   * configure fmc timing parameters
-   */
-  FMC_NORSRAM_TimingTypeDef fmc_timing;
-
-  // don't care in sync mode
-  fmc_timing.AddressSetupTime = 15;
-
-  // don't care in sync mode
-  fmc_timing.AddressHoldTime = 15;
-
-  // don't care in sync mode
-  fmc_timing.DataSetupTime = 255;
-
-  // not needed, since nwait will be polled manually
-  fmc_timing.BusTurnAroundDuration = 0;
-
-  // use smallest allowed divisor for best performance
-  fmc_timing.CLKDivision = 2;
-
-  // stm is too slow to work with min allowed 2-cycle latency
-  fmc_timing.DataLatency = 3;
-
-  // don't care in sync mode
-  fmc_timing.AccessMode = FMC_ACCESS_MODE_A;
-
-  // initialize fmc
-  HAL_SRAM_Init(&_fmc_fpga_inst, &fmc_timing, NULL);
-}
-
-
-//------------------------------------------------------------------------------
-// EOF
-//------------------------------------------------------------------------------
diff --git a/src/stm-init.c b/src/stm-init.c
deleted file mode 100644
index f8610cd..0000000
--- a/src/stm-init.c
+++ /dev/null
@@ -1,189 +0,0 @@
-/**
-  ******************************************************************************
-  * 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 "stm32f4xx_hal.h"
-#include "stm-init.h"
-#include "stm-led.h"
-#include "stm-fmc.h"
-#include "stm-uart.h"
-
-/* Private variables ---------------------------------------------------------*/
-static GPIO_InitTypeDef  GPIO_InitStruct;
-
-/* Private function prototypes -----------------------------------------------*/
-static void SystemClock_Config(void);
-static void MX_GPIO_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.
- */
-static 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);
-}
-
-#if 0
-/** System Clock Configuration
- *
- * HSI source, end result is 16 MHz SYSCLK
- *
-*/
-static 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);
-
-  /* XXX Does this need HAL_PWREx_ActivateOverDrive() and
-   * HAL_RCC_ClockConfig() to function properly??
-   */
-}
-#endif
-
-/** Configure pins as
-        * Analog
-        * Input
-        * Output
-        * EVENT_OUT
-        * EXTI
-*/
-static 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****/
diff --git a/src/stm-uart.c b/src/stm-uart.c
deleted file mode 100644
index 7676645..0000000
--- a/src/stm-uart.c
+++ /dev/null
@@ -1,76 +0,0 @@
-/* Includes ------------------------------------------------------------------*/
-#include "stm32f4xx_hal.h"
-#include "stm-uart.h"
-
-#include <string.h>
-
-static UART_HandleTypeDef huart2;
-
-extern void Error_Handler();
-
-
-/* Private variables ---------------------------------------------------------*/
-
-/* Private function prototypes -----------------------------------------------*/
-
-/* 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();
-  }
-}
-
-void uart_send_char(uint8_t ch)
-{
-  HAL_UART_Transmit(&huart2, &ch, 1, 0x1);
-}
-
-void uart_send_string(char *s)
-{
-  HAL_UART_Transmit(&huart2, (uint8_t *) s, strlen(s), 0x1);
-}
-
-/* Generalized routine to send binary, decimal, and hex integers.
- * This code is adapted from Chris Giese's printf.c
- */
-void uart_send_number(uint32_t num, uint8_t digits, uint8_t radix)
-{
-    #define BUFSIZE 32
-    char buf[BUFSIZE];
-    char *where = buf + BUFSIZE;
-
-    /* initialize buf so we can add leading 0 by adjusting the pointer */
-    memset(buf, '0', BUFSIZE);
-
-    /* build the string backwards, starting with the least significant digit */
-    do {
-	uint32_t temp;
-	temp = num % radix;
-	where--;
-	if (temp < 10)
-	    *where = temp + '0';
-	else
-	    *where = temp - 10 + 'A';
-	num = num / radix;
-    } while (num != 0);
-
-    if (where > buf + BUFSIZE - digits)
-	/* pad with leading 0 */
-	where = buf + BUFSIZE - digits;
-    else
-	/* number is larger than the specified number of digits */
-	digits = buf + BUFSIZE - where;
-
-    HAL_UART_Transmit(&huart2, (uint8_t *) where, digits, 0x1);
-}
diff --git a/src/stm32f4xx_hal_msp.c b/src/stm32f4xx_hal_msp.c
deleted file mode 100644
index ee2cb7e..0000000
--- a/src/stm32f4xx_hal_msp.c
+++ /dev/null
@@ -1,143 +0,0 @@
-/**
-******************************************************************************
-* File Name          : stm32f4xx_hal_msp.c
-* 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"
-
-/* USER CODE BEGIN 0 */
-
-/* USER CODE END 0 */
-
-/**
- * Initializes the Global MSP.
- */
-void HAL_MspInit(void)
-{
-  /* USER CODE BEGIN MspInit 0 */
-
-  /* USER CODE END MspInit 0 */
-
-  HAL_NVIC_SetPriorityGrouping(NVIC_PRIORITYGROUP_4);
-
-  /* System interrupt init*/
-  /* SysTick_IRQn interrupt configuration */
-  HAL_NVIC_SetPriority(SysTick_IRQn, 0, 0);
-
-  /* USER CODE BEGIN MspInit 1 */
-
-  /* USER CODE END MspInit 1 */
-}
-
-void HAL_RNG_MspInit(RNG_HandleTypeDef* hrng)
-{
-
-  if(hrng->Instance==RNG)
-    {
-      /* USER CODE BEGIN RNG_MspInit 0 */
-
-      /* USER CODE END RNG_MspInit 0 */
-      /* Peripheral clock enable */
-      __RNG_CLK_ENABLE();
-      /* USER CODE BEGIN RNG_MspInit 1 */
-
-      /* USER CODE END RNG_MspInit 1 */
-    }
-
-}
-
-void HAL_RNG_MspDeInit(RNG_HandleTypeDef* hrng)
-{
-
-  if(hrng->Instance==RNG)
-    {
-      /* USER CODE BEGIN RNG_MspDeInit 0 */
-
-      /* USER CODE END RNG_MspDeInit 0 */
-      /* Peripheral clock disable */
-      __RNG_CLK_DISABLE();
-    }
-  /* USER CODE BEGIN RNG_MspDeInit 1 */
-
-  /* USER CODE END RNG_MspDeInit 1 */
-
-}
-
-
-
-void HAL_SRAM_MspInit(SRAM_HandleTypeDef* hsram)
-{
-}
-
-
-void HAL_SRAM_MspDeInit(SRAM_HandleTypeDef* hsram)
-{
-}
-
-void HAL_UART_MspInit(UART_HandleTypeDef* huart)
-{
-  GPIO_InitTypeDef GPIO_InitStruct;
-
-  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/stm32f4xx_it.c b/src/stm32f4xx_it.c
deleted file mode 100644
index b2b64bf..0000000
--- a/src/stm32f4xx_it.c
+++ /dev/null
@@ -1,73 +0,0 @@
-/**
-******************************************************************************
-* @file    stm32f4xx_it.c
-* @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"
-
-/* USER CODE BEGIN 0 */
-
-/* USER CODE END 0 */
-
-/* External variables --------------------------------------------------------*/
-
-/******************************************************************************/
-/*            Cortex-M4 Processor Interruption and Exception Handlers         */
-/******************************************************************************/
-
-/**
- * @brief This function handles System tick timer.
- */
-void SysTick_Handler(void)
-{
-  /* USER CODE BEGIN SysTick_IRQn 0 */
-
-  /* USER CODE END SysTick_IRQn 0 */
-  HAL_IncTick();
-  HAL_SYSTICK_IRQHandler();
-  /* USER CODE BEGIN SysTick_IRQn 1 */
-
-  /* USER CODE END SysTick_IRQn 1 */
-}
-
-/******************************************************************************/
-/* STM32F4xx Peripheral Interrupt Handlers                                    */
-/* Add here the Interrupt Handlers for the used peripherals.                  */
-/* For the available peripheral interrupt handler names,                      */
-/* please refer to the startup file (startup_stm32f4xx.s).                    */
-/******************************************************************************/
-
-/* USER CODE BEGIN 1 */
-
-/* USER CODE END 1 */
-/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/