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/**
******************************************************************************
* @file BSP/Src/eeprom.c
* @author MCD Application Team
* @brief This example code shows how to manage an I2C M24LR64
* EEPROM memory
* ===================================================================
* Notes:
* - This driver is intended for STM32F4xx families devices only.
* - The I2C EEPROM memory (M24LR64) is available on separate daughter
* board ANT7-M24LR-A, which is not provided with the STM32F429I
* DISCOVERY board.
* To use this driver you have to connect the ANT7-M24LR-A to CN3
* connector of STM32F429I DISCOVERY board.
* Switch EE_M24LR64 needs to be enabled in your project.
* ===================================================================
******************************************************************************
* @attention
*
* Copyright (c) 2017 STMicroelectronics.
* All rights reserved.
*
* This software is licensed under terms that can be found in the LICENSE file
* in the root directory of this software component.
* If no LICENSE file comes with this software, it is provided AS-IS.
*
******************************************************************************
*/
/* Includes ------------------------------------------------------------------*/
#include "main.h"
/** @addtogroup STM32F4xx_HAL_Examples
* @{
*/
/** @addtogroup BSP
* @{
*/
/* Private typedef -----------------------------------------------------------*/
typedef enum {FAILED = 0, PASSED = !FAILED} TestStatus;
/* Private define ------------------------------------------------------------*/
#define EEPROM_FEATURES_NUM 2
#define BUFFER_SIZE1 (countof(Tx1Buffer)-1 + 10)
#define EEPROM_WRITE_ADDRESS1 0x50
#define EEPROM_READ_ADDRESS1 0x50
/* Private macro -------------------------------------------------------------*/
#define countof(a) (sizeof(a) / sizeof(*(a)))
/* Private variables ---------------------------------------------------------*/
extern uint8_t NbLoop;
static uint8_t EEPROMFeature = 0;
uint8_t EEPROMConnected =1;
/* Private function prototypes -----------------------------------------------*/
static void EEPROM_SetHint(void);
static void EEPROM_Show_Feature(uint8_t feature);
static TestStatus Buffercmp(uint8_t* pBuffer1, uint8_t* pBuffer2, uint16_t BufferLength);
/* Private functions ---------------------------------------------------------*/
/**
* @brief EEPROM Demo
* @param None
* @retval None
*/
void EEPROM_demo(void)
{
EEPROM_SetHint();
EEPROMFeature = 0;
EEPROM_Show_Feature(EEPROMFeature);
while (1)
{
if(CheckForUserInput() > 0)
{
if(++EEPROMFeature < EEPROM_FEATURES_NUM)
{
EEPROM_Show_Feature(EEPROMFeature);
}
else
{
return;
}
}
HAL_Delay(100);
}
}
/**
* @brief Display EEPROM Demo Hint
* @param None
* @retval None
*/
static void EEPROM_SetHint(void)
{
/* Clear the LCD */
BSP_LCD_Clear(LCD_COLOR_WHITE);
/* Set LCD Demo description */
BSP_LCD_SetTextColor(LCD_COLOR_BLUE);
BSP_LCD_FillRect(0, 0, BSP_LCD_GetXSize(), 80);
BSP_LCD_SetTextColor(LCD_COLOR_WHITE);
BSP_LCD_SetBackColor(LCD_COLOR_BLUE);
BSP_LCD_SetFont(&Font24);
BSP_LCD_DisplayStringAt(0, 0, (uint8_t*)"EEPROM", CENTER_MODE);
BSP_LCD_SetFont(&Font12);
BSP_LCD_DisplayStringAt(0, 30, (uint8_t*)"This example shows the different", CENTER_MODE);
BSP_LCD_DisplayStringAt(0, 45, (uint8_t*)"EEPROM Features, use BUTTON", CENTER_MODE);
BSP_LCD_DisplayStringAt(0, 60, (uint8_t*)"to start EEPROM data transfer", CENTER_MODE);
/* Set the LCD Text Color */
BSP_LCD_SetTextColor(LCD_COLOR_BLUE);
BSP_LCD_DrawRect(10, 90, BSP_LCD_GetXSize() - 20, BSP_LCD_GetYSize()- 100);
BSP_LCD_DrawRect(11, 91, BSP_LCD_GetXSize() - 22, BSP_LCD_GetYSize()- 102);
}
/**
* @brief Show EEPROM Features
* @param feature: feature index
* @retval None
*/
static void EEPROM_Show_Feature(uint8_t feature)
{
uint8_t Tx1Buffer[] = "STM32F429I EEPROM Ex.";
uint8_t Rx1Buffer[BUFFER_SIZE1] = {0};
uint8_t Tx2Buffer[BUFFER_SIZE1] = {0};
__IO TestStatus TransferStatus1 = FAILED;
__IO uint16_t NumDataRead = 0;
BSP_LCD_SetBackColor(LCD_COLOR_WHITE);
BSP_LCD_SetTextColor(LCD_COLOR_WHITE);
BSP_LCD_FillRect(12, 92, BSP_LCD_GetXSize() - 24, BSP_LCD_GetYSize()- 104);
BSP_LCD_SetTextColor(LCD_COLOR_BLACK);
/* Initialize the I2C EEPROM driver ----------------------------------------*/
if (BSP_EEPROM_Init() != EEPROM_OK)
{
BSP_LCD_SetTextColor(LCD_COLOR_RED);
BSP_LCD_DisplayStringAt(0, 115, (uint8_t*)"Initialization problem", CENTER_MODE);
BSP_LCD_DisplayStringAt(0, 130, (uint8_t*)"Check if HW connected or", CENTER_MODE);
BSP_LCD_DisplayStringAt(0, 145, (uint8_t*)"HW version not supported", CENTER_MODE);
return;
}
EEPROMConnected = 1;
/* Wait for EEPROM standby state */
BSP_EEPROM_WaitEepromStandbyState();
switch (feature)
{
case 0:
/* Read old parameter in EEPROM */
if (EEPROMConnected == 1)
{
/* Set the Number of data to be read */
NumDataRead = BUFFER_SIZE1;
/* Read from I2C EEPROM from EEPROM_READ_ADDRESS1 */
if (BSP_EEPROM_ReadBuffer(Rx1Buffer, EEPROM_READ_ADDRESS1, (uint16_t *)(&NumDataRead)) != EEPROM_OK)
{
BSP_LCD_SetTextColor(LCD_COLOR_RED);
BSP_LCD_DisplayStringAt(0, 115, (uint8_t*)"Init issue at read old data", CENTER_MODE);
BSP_LCD_SetTextColor(LCD_COLOR_BLACK);
BSP_LCD_DisplayStringAt(0, 145, (uint8_t*)"Press again USER key", CENTER_MODE);
BSP_LCD_DisplayStringAt(0, 160, (uint8_t*)"To write new data", CENTER_MODE);
return;
}
BSP_LCD_DisplayStringAt(0, 115, (uint8_t*)"String read", CENTER_MODE);
BSP_LCD_DisplayStringAt(0, 130, (uint8_t*)"in EEPROM:", CENTER_MODE);
BSP_LCD_SetTextColor(LCD_COLOR_BLUE);
BSP_LCD_DisplayStringAt(0, 160, Rx1Buffer, CENTER_MODE);
BSP_LCD_SetTextColor(LCD_COLOR_BLACK);
BSP_LCD_DisplayStringAt(0, 190, (uint8_t*)"Press USER key", CENTER_MODE);
BSP_LCD_DisplayStringAt(0, 205, (uint8_t*)"To write new data", CENTER_MODE);
}
else
{
BSP_LCD_SetTextColor(LCD_COLOR_RED);
BSP_LCD_DisplayStringAt(0, 115, (uint8_t*)"Problem to communicate", CENTER_MODE);
BSP_LCD_DisplayStringAt(0, 130, (uint8_t*)"with EEPROM", CENTER_MODE);
BSP_LCD_DisplayStringAt(0, 145, (uint8_t*)"Press again USER key", CENTER_MODE);
}
break;
case 1:
/* Write new parameter in EEPROM */
if (EEPROMConnected == 1)
{
snprintf((char*)Tx2Buffer, BUFFER_SIZE1, "%s test %d", Tx1Buffer, NbLoop);
/* First write in the memory followed by a read of the written data --------*/
/* Write on I2C EEPROM to EEPROM_WRITE_ADDRESS1 */
if (BSP_EEPROM_WriteBuffer(Tx2Buffer, EEPROM_WRITE_ADDRESS1, BUFFER_SIZE1) != EEPROM_OK)
{
BSP_LCD_SetTextColor(LCD_COLOR_RED);
BSP_LCD_DisplayStringAt(0, 115, (uint8_t*)"Init issue at write", CENTER_MODE);
return;
}
/* Wait for EEPROM standby state */
BSP_EEPROM_WaitEepromStandbyState();
/* Set the Number of data to be read */
NumDataRead = BUFFER_SIZE1;
/* Read from I2C EEPROM from EEPROM_READ_ADDRESS1 */
if (BSP_EEPROM_ReadBuffer(Rx1Buffer, EEPROM_READ_ADDRESS1, (uint16_t *)(&NumDataRead)) != EEPROM_OK)
{
BSP_LCD_SetTextColor(LCD_COLOR_RED);
BSP_LCD_DisplayStringAt(0, 115, (uint8_t*)"Init issue at read", CENTER_MODE);
return;
}
/* Check if the data written to the memory is read correctly */
TransferStatus1 = Buffercmp(Tx2Buffer, Rx1Buffer, BUFFER_SIZE1);
if(TransferStatus1 != FAILED)
{
BSP_LCD_DisplayStringAt(0, 115, (uint8_t*)"String writes", CENTER_MODE);
BSP_LCD_DisplayStringAt(0, 130, (uint8_t*)"in EEPROM:", CENTER_MODE);
BSP_LCD_SetTextColor(LCD_COLOR_BLUE);
BSP_LCD_DisplayStringAt(0, 160, Tx2Buffer, CENTER_MODE);
}
else
{
BSP_LCD_SetTextColor(LCD_COLOR_RED);
BSP_LCD_DisplayStringAt(0, 115, (uint8_t*)"FAILED to write!", CENTER_MODE);
BSP_LCD_DisplayStringAt(0, 130, (uint8_t*)"Press USER key to end test", CENTER_MODE);
}
}
else
{
BSP_LCD_SetTextColor(LCD_COLOR_RED);
BSP_LCD_DisplayStringAt(0, 115, (uint8_t*)"Problem to communicate", CENTER_MODE);
BSP_LCD_DisplayStringAt(0, 130, (uint8_t*)"again with EEPROM", CENTER_MODE);
BSP_LCD_DisplayStringAt(0, 130, (uint8_t*)"Press USER key to end test", CENTER_MODE);
}
break;
}
}
/**
* @brief Basic management of the timeout situation.
* @param None
* @retval None
*/
void BSP_EEPROM_TIMEOUT_UserCallback(void)
{
EEPROMConnected = 0;
}
/**
* @brief Compares two buffers.
* @param pBuffer1, pBuffer2: buffers to be compared.
* @param BufferLength: buffer's length
* @retval PASSED: pBuffer1 identical to pBuffer2
* FAILED: pBuffer1 differs from pBuffer2
*/
static TestStatus Buffercmp(uint8_t* pBuffer1, uint8_t* pBuffer2, uint16_t BufferLength)
{
while(BufferLength--)
{
if(*pBuffer1 != *pBuffer2)
{
return FAILED;
}
pBuffer1++;
pBuffer2++;
}
return PASSED;
}
/**
* @}
*/
/**
* @}
*/
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