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/**
******************************************************************************
* @file DMA/DMA_FLASHToRAM/Src/main.c
* @author MCD Application Team
* @version V1.4.0
* @date 29-April-2016
* @brief This example provides a description of how to use a DMA channel
* to transfer a word data buffer from FLASH memory to embedded
* SRAM memory through the STM32F1xx HAL API.
******************************************************************************
* @attention
*
* <h2><center>© COPYRIGHT(c) 2016 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.
*
******************************************************************************
*/
/* Includes ------------------------------------------------------------------*/
#include "main.h"
/** @addtogroup STM32F1xx_HAL_Examples
* @{
*/
/** @addtogroup DMA_FLASHToRAM
* @{
*/
/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* DMA Handle declaration */
DMA_HandleTypeDef DmaHandle;
static const uint32_t aSRC_Const_Buffer[BUFFER_SIZE] =
{
0x01020304, 0x05060708, 0x090A0B0C, 0x0D0E0F10,
0x11121314, 0x15161718, 0x191A1B1C, 0x1D1E1F20,
0x21222324, 0x25262728, 0x292A2B2C, 0x2D2E2F30,
0x31323334, 0x35363738, 0x393A3B3C, 0x3D3E3F40,
0x41424344, 0x45464748, 0x494A4B4C, 0x4D4E4F50,
0x51525354, 0x55565758, 0x595A5B5C, 0x5D5E5F60,
0x61626364, 0x65666768, 0x696A6B6C, 0x6D6E6F70,
0x71727374, 0x75767778, 0x797A7B7C, 0x7D7E7F80
};
uint32_t aDST_Buffer[BUFFER_SIZE];
static __IO uint32_t transferErrorDetected; /* Set to 1 if an error transfer is detected */
static __IO uint32_t transferCompleteDetected; /* Set to 1 if transfer is correctly completed */
/* Private function prototypes -----------------------------------------------*/
static void DMA_Config(void);
void SystemClock_Config(void);
static void Error_Handler(void);
static void TransferComplete(DMA_HandleTypeDef *DmaHandle);
static void TransferError(DMA_HandleTypeDef *DmaHandle);
/* Private functions ---------------------------------------------------------*/
/**
* @brief Main program
* @param None
* @retval None
*/
int main(void)
{
/* STM32F103xG HAL library initialization:
- Configure the Flash prefetch
- Systick timer is configured by default as source of time base, but user
can eventually implement his proper time base source (a general purpose
timer for example or other time source), keeping in mind that Time base
duration should be kept 1ms since PPP_TIMEOUT_VALUEs are defined and
handled in milliseconds basis.
- Set NVIC Group Priority to 4
- Low Level Initialization
*/
HAL_Init();
/* Configure the system clock to 72 MHz */
SystemClock_Config();
/* Initialize LEDs */
BSP_LED_Init(LED1);
BSP_LED_Init(LED2);
BSP_LED_Init(LED3);
/* Set to 1 if an transfer error is detected */
transferErrorDetected = 0;
transferCompleteDetected = 0;
/* Configure and enable the DMA channel for Memory to Memory transfer */
DMA_Config();
/* Infinite loop */
while (1)
{
if (transferErrorDetected == 1)
{
/* Turn LED2 on*/
BSP_LED_On(LED2);
transferErrorDetected = 0;
}
if (transferCompleteDetected == 1)
{
/* Turn LED1 on*/
BSP_LED_On(LED1);
transferCompleteDetected = 0;
}
}
}
/**
* @brief Configure the DMA controller according to the Stream parameters
* defined in main.h file
* @note This function is used to :
* -1- Enable DMA1 clock
* -2- Select the DMA functional Parameters
* -3- Select the DMA instance to be used for the transfer
* -4- Select Callbacks functions called after Transfer complete and
Transfer error interrupt detection
* -5- Initialize the DMA channel
* -6- Configure NVIC for DMA transfer complete/error interrupts
* -7- Start the DMA transfer using the interrupt mode
* @param None
* @retval None
*/
static void DMA_Config(void)
{
/*## -1- Enable DMA1 clock #################################################*/
__HAL_RCC_DMA1_CLK_ENABLE();
/*##-2- Select the DMA functional Parameters ###############################*/
DmaHandle.Init.Direction = DMA_MEMORY_TO_MEMORY; /* M2M transfer mode */
DmaHandle.Init.PeriphInc = DMA_PINC_ENABLE; /* Peripheral increment mode Enable */
DmaHandle.Init.MemInc = DMA_MINC_ENABLE; /* Memory increment mode Enable */
DmaHandle.Init.PeriphDataAlignment = DMA_PDATAALIGN_WORD; /* Peripheral data alignment : Word */
DmaHandle.Init.MemDataAlignment = DMA_MDATAALIGN_WORD; /* memory data alignment : Word */
DmaHandle.Init.Mode = DMA_NORMAL; /* Normal DMA mode */
DmaHandle.Init.Priority = DMA_PRIORITY_HIGH; /* priority level : high */
/*##-3- Select the DMA instance to be used for the transfer : DMA1_Channel1 #*/
DmaHandle.Instance = DMA_INSTANCE;
/*##-4- Select Callbacks functions called after Transfer complete and Transfer error */
DmaHandle.XferCpltCallback = TransferComplete;
DmaHandle.XferErrorCallback = TransferError;
/*##-5- Initialize the DMA channel ##########################################*/
if (HAL_DMA_Init(&DmaHandle) != HAL_OK)
{
/* Initialization Error */
Error_Handler();
}
/*##-6- Configure NVIC for DMA transfer complete/error interrupts ##########*/
/* Set Interrupt Group Priority */
HAL_NVIC_SetPriority(DMA_INSTANCE_IRQ, 0, 0);
/* Enable the DMA STREAM global Interrupt */
HAL_NVIC_EnableIRQ(DMA_INSTANCE_IRQ);
/*##-7- Start the DMA transfer using the interrupt mode ####################*/
/* Configure the source, destination and buffer size DMA fields and Start DMA Channel transfer */
/* Enable All the DMA interrupts */
if (HAL_DMA_Start_IT(&DmaHandle, (uint32_t)&aSRC_Const_Buffer, (uint32_t)&aDST_Buffer, BUFFER_SIZE) != HAL_OK)
{
/* Transfer Error */
Error_Handler();
}
}
/**
* @brief DMA conversion complete callback
* @note This function is executed when the transfer complete interrupt
* is generated
* @retval None
*/
static void TransferComplete(DMA_HandleTypeDef *DmaHandle)
{
transferCompleteDetected = 1;
}
/**
* @brief DMA conversion error callback
* @note This function is executed when the transfer error interrupt
* is generated during DMA transfer
* @retval None
*/
static void TransferError(DMA_HandleTypeDef *DmaHandle)
{
transferErrorDetected = 1;
}
/**
* @brief System Clock Configuration
* The system Clock is configured as follow :
* System Clock source = PLL (HSE)
* SYSCLK(Hz) = 72000000
* HCLK(Hz) = 72000000
* AHB Prescaler = 1
* APB1 Prescaler = 2
* APB2 Prescaler = 1
* HSE Frequency(Hz) = 8000000
* HSE PREDIV1 = 1
* PLLMUL = 9
* Flash Latency(WS) = 2
* @param None
* @retval None
*/
void SystemClock_Config(void)
{
RCC_ClkInitTypeDef clkinitstruct = {0};
RCC_OscInitTypeDef oscinitstruct = {0};
/* Enable HSE Oscillator and activate PLL with HSE as source */
oscinitstruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
oscinitstruct.HSEState = RCC_HSE_ON;
oscinitstruct.HSEPredivValue = RCC_HSE_PREDIV_DIV1;
oscinitstruct.PLL.PLLState = RCC_PLL_ON;
oscinitstruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
oscinitstruct.PLL.PLLMUL = RCC_PLL_MUL9;
if (HAL_RCC_OscConfig(&oscinitstruct)!= HAL_OK)
{
/* Initialization Error */
while(1);
}
/* Select PLL as system clock source and configure the HCLK, PCLK1 and PCLK2
clocks dividers */
clkinitstruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2);
clkinitstruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
clkinitstruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
clkinitstruct.APB2CLKDivider = RCC_HCLK_DIV1;
clkinitstruct.APB1CLKDivider = RCC_HCLK_DIV2;
if (HAL_RCC_ClockConfig(&clkinitstruct, FLASH_LATENCY_2)!= HAL_OK)
{
/* Initialization Error */
while(1);
}
}
/**
* @brief This function is executed in case of error occurrence.
* @param None
* @retval None
*/
static void Error_Handler(void)
{
/* Turn LED3 on: Transfer Error */
BSP_LED_On(LED3);
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 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) */
/* Infinite loop */
while (1)
{
}
}
#endif
/**
* @}
*/
/**
* @}
*/
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
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