From 43b94a6ada83454c3404bda019ec114f97379c82 Mon Sep 17 00:00:00 2001
From: "Pavel V. Shatov" <meisterpaul1@yandex.ru>
Date: Thu, 27 Aug 2015 00:01:24 +0400
Subject: Initial version of FMC driver for STM32.

---
 Src/main.c              | 283 ++++++++++++++++++++++++++++++++++++++++++++
 Src/stm-fmc.c           | 303 ++++++++++++++++++++++++++++++++++++++++++++++++
 Src/stm-fmc.h           |  46 ++++++++
 Src/stm32f4xx_hal_msp.c | 107 +++++++++++++++++
 Src/stm32f4xx_it.c      |  73 ++++++++++++
 5 files changed, 812 insertions(+)
 create mode 100644 Src/main.c
 create mode 100644 Src/stm-fmc.c
 create mode 100644 Src/stm-fmc.h
 create mode 100644 Src/stm32f4xx_hal_msp.c
 create mode 100644 Src/stm32f4xx_it.c

(limited to 'Src')

diff --git a/Src/main.c b/Src/main.c
new file mode 100644
index 0000000..705a04f
--- /dev/null
+++ b/Src/main.c
@@ -0,0 +1,283 @@
+//------------------------------------------------------------------------------
+// main.c
+//------------------------------------------------------------------------------
+
+
+//------------------------------------------------------------------------------
+// Headers
+//------------------------------------------------------------------------------
+#include "stm32f4xx_hal.h"
+#include "stm-fmc.h"
+
+
+//------------------------------------------------------------------------------
+// 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
+
+
+//------------------------------------------------------------------------------
+// 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)
+
+
+//------------------------------------------------------------------------------
+// Variables
+//------------------------------------------------------------------------------
+RNG_HandleTypeDef rng_inst;
+
+
+
+//------------------------------------------------------------------------------
+// Prototypes
+//------------------------------------------------------------------------------
+void SystemClock_Config(void);
+
+static void MX_RNG_Init(void);
+static void MX_GPIO_Init(void);
+
+int test_fpga_data_bus(void);
+int test_fpga_address_bus(void);
+
+
+//------------------------------------------------------------------------------
+// Defines
+//------------------------------------------------------------------------------
+#define TEST_NUM_ROUNDS		100000
+
+
+//------------------------------------------------------------------------------
+int main(void)
+//------------------------------------------------------------------------------
+{
+		// initialize hal
+  HAL_Init();
+
+		// configure system clock
+  SystemClock_Config();
+
+		// initialize gpio
+	MX_GPIO_Init();
+	
+		// initialize rng
+	MX_RNG_Init();
+	
+		// prepare fmc interface
+	fmc_init();
+
+		// turn on green led, turn off other leds
+	led_on(GPIO_PIN_LED_GREEN);
+	led_off(GPIO_PIN_LED_YELLOW);
+	led_off(GPIO_PIN_LED_RED);
+	led_off(GPIO_PIN_LED_BLUE);
+	
+		// vars
+	int test_ok;
+
+		// main loop (test, until an error is detected)
+  while (1)
+  {
+			// test data bus
+		test_ok = test_fpga_data_bus();
+		
+			// check for errors (abort testing in case of error)
+		if (test_ok < TEST_NUM_ROUNDS) /*break*/;
+			
+		
+			// test address bus
+		test_ok = test_fpga_address_bus();
+		
+			// check for errors (abort testing in case of error)
+		if (test_ok < TEST_NUM_ROUNDS) /*break*/;
+		
+			// toggle yellow led to indicate, that we are alive
+		led_toggle(GPIO_PIN_LED_YELLOW);
+  }
+
+		// error handler
+	while (1)
+	{
+			// turn on red led, turn off other leds
+		led_on(GPIO_PIN_LED_RED);
+		led_off(GPIO_PIN_LED_GREEN);
+		led_off(GPIO_PIN_LED_YELLOW);
+		led_off(GPIO_PIN_LED_BLUE);		
+	}
+
+		// should never reach this line
+}
+
+
+//------------------------------------------------------------------------------
+int test_fpga_data_bus(void)
+//------------------------------------------------------------------------------
+{
+	int c, ok;
+	uint32_t rnd, buf;
+	HAL_StatusTypeDef hal_result;
+	
+		// run some rounds of data bus test
+	for (c=0; c<TEST_NUM_ROUNDS; c++)
+	{
+			// try to generate "random" number
+		hal_result = HAL_RNG_GenerateRandomNumber(&rng_inst, &rnd);
+		if (hal_result != HAL_OK) break;
+		
+			// write value to fpga at address 0
+		ok = fmc_write_32(0, &rnd);
+		if (ok != 0) break;
+		
+			// read value from fpga
+		ok = fmc_read_32(0, &buf);
+		if (ok != 0) break;
+		
+			// compare (abort testing in case of error)
+		if (buf != rnd)
+		{
+			uint32_t diff = buf;
+			diff ^= rnd;
+			diff = 0;	// place breakpoint here if needed
+			break;
+		}
+	}
+
+		// return number of successful tests
+	return c;
+}
+
+
+//------------------------------------------------------------------------------
+int test_fpga_address_bus(void)
+//------------------------------------------------------------------------------
+{
+	int c, ok;
+  uint32_t rnd, buf;
+  HAL_StatusTypeDef hal_result;
+
+		// run some rounds of address bus test
+  for (c=0; c<TEST_NUM_ROUNDS; c++)
+  {
+			// try to generate "random" number
+    hal_result = HAL_RNG_GenerateRandomNumber(&rng_inst, &rnd);
+    if (hal_result != HAL_OK) break;
+    
+			// we only have 2^22 32-bit words
+		rnd &= 0x00FFFFFC;
+    
+			// don't test zero addresses (fpga will store data, not address)
+    if (rnd == 0) continue;
+    
+			// write dummy value to fpga at some non-zero address
+    ok = fmc_write_32(rnd, &buf);
+    if (ok != 0) break;
+		
+			// read value from fpga
+    ok = fmc_read_32(0, &buf);
+    if (ok != 0) break;
+    
+			// fpga receives address of 32-bit word, while we need
+			// byte address here to compare
+    buf <<= 2;
+    
+			// compare (abort testing in case of error)
+    if (buf != rnd)
+		{
+			uint32_t diff = buf;
+			diff ^= rnd;
+			diff = 0;	// place breakpoint here if needed
+			break;
+		}
+  }
+  
+  return c;
+}
+
+
+//------------------------------------------------------------------------------
+void SystemClock_Config(void)
+//------------------------------------------------------------------------------
+{
+
+  RCC_OscInitTypeDef RCC_OscInitStruct;
+  RCC_ClkInitTypeDef RCC_ClkInitStruct;
+
+  __PWR_CLK_ENABLE();
+
+  __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);
+
+  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;
+  RCC_OscInitStruct.HSIState = RCC_HSI_ON;
+  RCC_OscInitStruct.HSICalibrationValue = 16;
+  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
+  RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI;
+  RCC_OscInitStruct.PLL.PLLM = 12;
+  RCC_OscInitStruct.PLL.PLLN = 270;
+  RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
+  RCC_OscInitStruct.PLL.PLLQ = 8;
+  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);
+
+  HAL_SYSTICK_Config(HAL_RCC_GetHCLKFreq()/1000);
+
+  HAL_SYSTICK_CLKSourceConfig(SYSTICK_CLKSOURCE_HCLK);
+
+}
+
+
+//------------------------------------------------------------------------------
+void MX_RNG_Init(void)
+//------------------------------------------------------------------------------
+{
+  rng_inst.Instance = RNG;
+  HAL_RNG_Init(&rng_inst);
+}
+
+
+//------------------------------------------------------------------------------
+void MX_GPIO_Init(void)
+//------------------------------------------------------------------------------
+{
+	GPIO_InitTypeDef GPIO_InitStruct;
+
+  __GPIOJ_CLK_ENABLE();
+
+  GPIO_InitStruct.Pin = GPIO_PIN_1 | GPIO_PIN_2 | GPIO_PIN_3 | GPIO_PIN_4;
+  GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
+  GPIO_InitStruct.Pull = GPIO_NOPULL;
+	GPIO_InitStruct.Speed = GPIO_SPEED_LOW;
+  HAL_GPIO_Init(GPIOJ, &GPIO_InitStruct);
+}
+
+
+//------------------------------------------------------------------------------
+#ifdef USE_FULL_ASSERT
+//------------------------------------------------------------------------------
+void assert_failed(uint8_t* file, uint32_t line)
+//------------------------------------------------------------------------------
+{
+}
+//------------------------------------------------------------------------------
+#endif
+//------------------------------------------------------------------------------
+
+
+//------------------------------------------------------------------------------
+// EOF
+//------------------------------------------------------------------------------
diff --git a/Src/stm-fmc.c b/Src/stm-fmc.c
new file mode 100644
index 0000000..980c8bf
--- /dev/null
+++ b/Src/stm-fmc.c
@@ -0,0 +1,303 @@
+//------------------------------------------------------------------------------
+// stm-fmc.c
+//------------------------------------------------------------------------------
+
+
+//------------------------------------------------------------------------------
+// Headers
+//------------------------------------------------------------------------------
+#include "stm-fmc.h"
+
+
+//------------------------------------------------------------------------------
+// Variables
+//------------------------------------------------------------------------------
+SRAM_HandleTypeDef _fmc_fpga_inst;
+
+
+//------------------------------------------------------------------------------
+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;
+}
+
+
+//------------------------------------------------------------------------------
+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;
+}
+
+//------------------------------------------------------------------------------
+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);
+}
+
+
+//------------------------------------------------------------------------------
+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-fmc.h b/Src/stm-fmc.h
new file mode 100644
index 0000000..05b91be
--- /dev/null
+++ b/Src/stm-fmc.h
@@ -0,0 +1,46 @@
+//------------------------------------------------------------------------------
+// stm-fmc.h
+//------------------------------------------------------------------------------
+
+
+//------------------------------------------------------------------------------
+// Headers
+//------------------------------------------------------------------------------
+#include "stm32f4xx_hal.h"
+
+
+//------------------------------------------------------------------------------
+// External Variables
+//------------------------------------------------------------------------------
+extern SRAM_HandleTypeDef _fmc_fpga_inst;
+
+
+//------------------------------------------------------------------------------
+// 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
+
+
+//------------------------------------------------------------------------------
+// Prototypes
+//------------------------------------------------------------------------------
+void fmc_init(void);
+
+int fmc_write_32(uint32_t addr, uint32_t *data);
+int fmc_read_32(uint32_t addr, uint32_t *data);
+	
+void _fmc_init_gpio(void);
+void _fmc_init_params(void);
+int _fmc_nwait_idle(void);
+
+
+//------------------------------------------------------------------------------
+// EOF
+//------------------------------------------------------------------------------
diff --git a/Src/stm32f4xx_hal_msp.c b/Src/stm32f4xx_hal_msp.c
new file mode 100644
index 0000000..a70dcf5
--- /dev/null
+++ b/Src/stm32f4xx_hal_msp.c
@@ -0,0 +1,107 @@
+/**
+  ******************************************************************************
+  * 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)
+{
+}
+
+
+/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
diff --git a/Src/stm32f4xx_it.c b/Src/stm32f4xx_it.c
new file mode 100644
index 0000000..6b45801
--- /dev/null
+++ b/Src/stm32f4xx_it.c
@@ -0,0 +1,73 @@
+/**
+  ******************************************************************************
+  * @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****/
-- 
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