Reading current date and time using RTC on STM32F407VET6

In STM32F407VET6 board we can calculate current date and time using following steps:

1. Go to Pinout & Configuration> Timers> RTC in RTC mode and Configuration.

2. Activate Clock Source & Activate Calendar should be enabled.

3. Alarm A should be selected as Internal Alarm.

4. Go to parameter configuration of RTC, set date and time to marked configuration below:

5. Enable interrupt in NVIC Settings

6. To read the date and time following code needs to be called in main.c file.

  RTC_TimeTypeDef sTime1;

  RTC_DateTypeDef sDate1;

  uint8_t buffer[20];

/* USER CODE BEGIN WHILE */

while (1)

{

        HAL_RTC_GetTime(&hrtc, &sTime1, RTC_FORMAT_BCD);

HAL_RTC_GetDate(&hrtc, &sDate1, RTC_FORMAT_BCD);

buffer[0] = (sDate1.Date / 16) + 48;

buffer[1] = (sDate1.Date % 16) + 48;

buffer[2] = '.';

buffer[3] = (sDate1.Month / 16) + 48;

buffer[4] = (sDate1.Month % 16) + 48;

buffer[5] = '.';

buffer[6] = '2';

buffer[7] = '0';

buffer[8] = (sDate1.Year / 16) + 48;

buffer[9] = (sDate1.Year % 16) + 48;

buffer[10] ='@';

buffer[11] = (sTime1.Hours / 16) + 48;

buffer[12] = (sTime1.Hours % 16) + 48;

buffer[13] = ':';

buffer[14] = (sTime1.Minutes / 16) + 48;

buffer[15] = (sTime1.Minutes % 16) + 48;

buffer[16] = ':';

buffer[17] = (sTime1.Seconds / 16) + 48;

buffer[18] = (sTime1.Seconds % 16) + 48;

}

/* USER CODE END 3 */

6. After building and flashing the code we will see result as shown below:

Decoded as 18.02.2024@20:20:46

CRC calculation in STM32F407VET6

 In STM32F407VET6 board we can calculate CRC-32/MPEG-2 using following steps:

1. Enable CRC engine at Pinout & Configuration> Computing> CRC mode and Configuration should be activated

2. Save project and generate the project

3. Define data buffer on which we wants to calculate CRC

uint32_t crcArray[4] = {0x00001111, 0x00002222, 0x00003333, 0x00004444};

4. Function call for crc needs to be called in main function as:

crcVal = HAL_CRC_Calculate(&hcrc, crcArray, 4);

Where, uint32 of CRC will be returned.

5. After running the code we will get CRC as shown below:

6. Verify CRC using Online calculator 

CRC value calculated on STM32 and online calculator are matching.

Blinky project for Arduino UNO Board

Steps to Blink LED present on Arduino UNO board.

1. Open Arduino UNO software.

2. Go to File> Examples> 01.Basic> Blink (It will open new window)

3. Connect Arduino UNO board with PC

4. Select board if not done to Arduino UNO\

5. Verify the Blink Code, in Output window it will show as below:

6. Upload code to board using Right Arrow key button (after upload pop will comes as done uploading)

7. LED present on Arduino UNO board will start blinking with delay of 1 sec specified in code.