mirror of
https://github.com/STMicroelectronics/STM32CubeF4.git
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297 lines
9.2 KiB
C
297 lines
9.2 KiB
C
/**
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******************************************************************************
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* @file FSMC/FSMC_SRAM/Src/main.c
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* @author MCD Application Team
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* @brief This sample code shows how to use STM32F4xx FSMC HAL API to access
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* by read and write operation the SRAM external memory device.
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******************************************************************************
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* @attention
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*
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* Copyright (c) 2017 STMicroelectronics.
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* All rights reserved.
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*
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* This software is licensed under terms that can be found in the LICENSE file
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* in the root directory of this software component.
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* If no LICENSE file comes with this software, it is provided AS-IS.
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*
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******************************************************************************
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*/
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/* Includes ------------------------------------------------------------------*/
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#include "main.h"
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/** @addtogroup STM32F4xx_HAL_Examples
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* @{
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*/
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/** @addtogroup FSMC_SRAM
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* @{
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*/
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/* Private typedef -----------------------------------------------------------*/
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/* Private define ------------------------------------------------------------*/
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#define BUFFER_SIZE ((uint32_t)0x0100)
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#define WRITE_READ_ADDR ((uint32_t)0x0800)
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/* Private macro -------------------------------------------------------------*/
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/* Private variables ---------------------------------------------------------*/
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SRAM_HandleTypeDef hsram;
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FSMC_NORSRAM_TimingTypeDef SRAM_Timing;
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/* Read/Write Buffers */
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uint16_t aTxBuffer[BUFFER_SIZE];
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uint16_t aRxBuffer[BUFFER_SIZE];
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/* Status variables */
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__IO uint32_t uwWriteReadStatus = 0;
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/* Counter index */
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uint32_t uwIndex = 0;
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/* Private function prototypes -----------------------------------------------*/
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static void SystemClock_Config(void);
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static void Error_Handler(void);
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static void Fill_Buffer(uint16_t *pBuffer, uint32_t uwBufferLenght, uint16_t uwOffset);
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static TestStatus Buffercmp(uint16_t *pBuffer1, uint16_t *pBuffer2, uint16_t BufferLength);
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/* Private functions ---------------------------------------------------------*/
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/**
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* @brief Main program
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* @param None
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* @retval None
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*/
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int main(void)
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{
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/* STM32F4xx HAL library initialization:
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- Configure the Flash prefetch, instruction and Data caches
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- Configure the Systick to generate an interrupt each 1 msec
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- Set NVIC Group Priority to 4
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- Global MSP (MCU Support Package) initialization
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*/
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HAL_Init();
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/* Configure the system clock to 168 MHz */
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SystemClock_Config();
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/* Configure LED1, LED2 and LED3 */
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BSP_LED_Init(LED1);
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BSP_LED_Init(LED2);
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BSP_LED_Init(LED3);
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/*##-1- Configure the SRAM device ##########################################*/
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/* SRAM device configuration */
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hsram.Instance = FSMC_NORSRAM_DEVICE;
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hsram.Extended = FSMC_NORSRAM_EXTENDED_DEVICE;
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SRAM_Timing.AddressSetupTime = 2;
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SRAM_Timing.AddressHoldTime = 1;
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SRAM_Timing.DataSetupTime = 2;
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SRAM_Timing.BusTurnAroundDuration = 1;
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SRAM_Timing.CLKDivision = 2;
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SRAM_Timing.DataLatency = 2;
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SRAM_Timing.AccessMode = FSMC_ACCESS_MODE_A;
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hsram.Init.NSBank = FSMC_NORSRAM_BANK2;
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hsram.Init.DataAddressMux = FSMC_DATA_ADDRESS_MUX_DISABLE;
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hsram.Init.MemoryType = FSMC_MEMORY_TYPE_SRAM;
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hsram.Init.MemoryDataWidth = SRAM_MEMORY_WIDTH;
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hsram.Init.BurstAccessMode = FSMC_BURST_ACCESS_MODE_DISABLE;
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hsram.Init.WaitSignalPolarity = FSMC_WAIT_SIGNAL_POLARITY_LOW;
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hsram.Init.WrapMode = FSMC_WRAP_MODE_DISABLE;
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hsram.Init.WaitSignalActive = FSMC_WAIT_TIMING_BEFORE_WS;
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hsram.Init.WriteOperation = FSMC_WRITE_OPERATION_ENABLE;
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hsram.Init.WaitSignal = FSMC_WAIT_SIGNAL_DISABLE;
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hsram.Init.ExtendedMode = FSMC_EXTENDED_MODE_DISABLE;
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hsram.Init.AsynchronousWait = FSMC_ASYNCHRONOUS_WAIT_DISABLE;
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hsram.Init.WriteBurst = FSMC_WRITE_BURST_DISABLE;
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/* Initialize the SRAM controller */
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if(HAL_SRAM_Init(&hsram, &SRAM_Timing, &SRAM_Timing) != HAL_OK)
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{
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/* Initialization Error */
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Error_Handler();
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}
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/*##-2- SRAM memory read/write access ######################################*/
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/* Fill the buffer to write */
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Fill_Buffer(aTxBuffer, BUFFER_SIZE, 0xC20F);
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/* Write data to the SRAM memory */
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for (uwIndex = 0; uwIndex < BUFFER_SIZE; uwIndex++)
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{
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*(__IO uint16_t*) (SRAM_BANK_ADDR + WRITE_READ_ADDR + 2*uwIndex) = aTxBuffer[uwIndex];
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}
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/* Read back data from the SRAM memory */
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for (uwIndex = 0; uwIndex < BUFFER_SIZE; uwIndex++)
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{
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aRxBuffer[uwIndex] = *(__IO uint16_t*) (SRAM_BANK_ADDR + WRITE_READ_ADDR + 2*uwIndex);
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}
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/*##-3- Checking data integrity ############################################*/
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uwWriteReadStatus = Buffercmp(aTxBuffer, aRxBuffer, BUFFER_SIZE);
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if (uwWriteReadStatus != PASSED)
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{
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/* KO */
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/* Turn on LED2 */
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BSP_LED_On(LED2);
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}
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else
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{
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/* OK */
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/* Turn on LED1 */
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BSP_LED_On(LED1);
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}
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/* Infinite loop */
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while (1)
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{
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}
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}
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/**
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* @brief System Clock Configuration
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* The system Clock is configured as follow :
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* System Clock source = PLL (HSE)
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* SYSCLK(Hz) = 168000000
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* HCLK(Hz) = 168000000
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* AHB Prescaler = 1
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* APB1 Prescaler = 4
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* APB2 Prescaler = 2
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* HSE Frequency(Hz) = 25000000
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* PLL_M = 25
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* PLL_N = 360
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* PLL_P = 2
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* PLL_Q = 7
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* VDD(V) = 3.3
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* Main regulator output voltage = Scale1 mode
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* Flash Latency(WS) = 5
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* @param None
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* @retval None
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*/
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static void SystemClock_Config(void)
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{
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RCC_ClkInitTypeDef RCC_ClkInitStruct;
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RCC_OscInitTypeDef RCC_OscInitStruct;
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/* Enable Power Control clock */
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__HAL_RCC_PWR_CLK_ENABLE();
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/* The voltage scaling allows optimizing the power consumption when the device is
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clocked below the maximum system frequency, to update the voltage scaling value
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regarding system frequency refer to product datasheet. */
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__HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);
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/* Enable HSE Oscillator and activate PLL with HSE as source */
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RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
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RCC_OscInitStruct.HSEState = RCC_HSE_ON;
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RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
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RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
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RCC_OscInitStruct.PLL.PLLM = 25;
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RCC_OscInitStruct.PLL.PLLN = 336;
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RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
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RCC_OscInitStruct.PLL.PLLQ = 7;
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HAL_RCC_OscConfig(&RCC_OscInitStruct);
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/* Select PLL as system clock source and configure the HCLK, PCLK1 and PCLK2
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clocks dividers */
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RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2);
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RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
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RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
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RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV4;
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RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV2;
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HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_5);
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/* STM32F405x/407x/415x/417x Revision Z and upper devices: prefetch is supported */
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if (HAL_GetREVID() >= 0x1001)
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{
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/* Enable the Flash prefetch */
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__HAL_FLASH_PREFETCH_BUFFER_ENABLE();
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}
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}
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/**
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* @brief This function is executed in case of error occurrence.
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* @param None
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* @retval None
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*/
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static void Error_Handler(void)
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{
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/* Turn LED3 on */
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BSP_LED_On(LED3);
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while(1)
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{
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}
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}
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/**
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* @brief Fills buffer with user predefined data.
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* @param pBuffer: pointer on the buffer to fill
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* @param uwBufferLenght: size of the buffer to fill
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* @param uwOffset: first value to fill on the buffer
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* @retval None
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*/
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static void Fill_Buffer(uint16_t *pBuffer, uint32_t uwBufferLenght, uint16_t uwOffset)
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{
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uint16_t tmpIndex = 0;
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/* Put in global buffer different values */
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for (tmpIndex = 0; tmpIndex < uwBufferLenght; tmpIndex++ )
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{
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pBuffer[tmpIndex] = tmpIndex + uwOffset;
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}
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}
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/**
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* @brief Compares two buffers.
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* @param pBuffer1, pBuffer2: buffers to be compared.
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* @param BufferLength: buffer's length
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* @retval PASSED: pBuffer identical to pBuffer1
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* FAILED: pBuffer differs from pBuffer1
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*/
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static TestStatus Buffercmp(uint16_t* pBuffer1, uint16_t* pBuffer2, uint16_t BufferLength)
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{
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while (BufferLength--)
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{
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if (*pBuffer1 != *pBuffer2)
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{
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return FAILED;
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}
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pBuffer1++;
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pBuffer2++;
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}
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return PASSED;
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}
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#ifdef USE_FULL_ASSERT
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/**
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* @brief Reports the name of the source file and the source line number
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* where the assert_param error has occurred.
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* @param file: pointer to the source file name
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* @param line: assert_param error line source number
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* @retval None
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*/
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void assert_failed(uint8_t* file, uint32_t line)
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{
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/* User can add his own implementation to report the file name and line number,
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ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
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/* Infinite loop */
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while (1)
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{
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}
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}
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#endif
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/**
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* @}
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*/
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/**
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* @}
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*/
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