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mikroSDK Library

SQI Flash click

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Author: MikroElektronika Team

Last Updated: 2018-03-07

Category: FLASH

Downloaded: 1703 times

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License: MIT license  

SQI FLASH click is based upon the SST26VF064B, 64 Mbit Serial Quad I/O flash device from Microchip. The chip utilizes 4-bit multiplexed I/O serial interface to boost performance. The click is a very fast solid-state, non-volatile data storage medium, that can be electrically erased and reprogrammed.

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mikroSDK Library Blog

SQI Flash Click

SQI Flash Click

Native view of the SQI Flash Click board.

View full image
SQI Flash click

SQI Flash click

Front and back view of the SQI Flash click.

View full image

Library carries all the necessary functions for the SQI Flash click.

Key functions

void SQIFLASH_WriteArray(uint32_t address, uint8_t* pData, uint16_t number) - Writes array of data to the address specified

void SQIFLASH_ReadArray(uint32_t address, uint8_t* pData, uint16_t num) - Reads array of data from the address specified

void SQIFLASH_SectorErase(uint32_t address) - Erases sector where provided address belong to

Examples Description

The application is composed of three sections :

  • System initialization - Initializes pins, SPI peripheral, UART used for logging.
  • Application initialization - Initializes driver and configures module but also checks the communication by reading the chip ID.
  • Application task - (Code snippet) Sequentially writes and reads data from the SQI FLASH click. Written and read data must match because both of them are at the same address. Information about the current reading and writing will be logged to UART.

The example uses the SQIFLASH_WriteByte function to write the value to a 32bit address, forwarded as the parameter to the write function. Both the value and the address are derived from the same variable - counter, which is increased at the end of the application task function. This value is printed at the UART terminal. 
After that, SQIFLASH_ReadByte function is used to read from the address of the SQI Flash module and it is stored in a separate variable, labeled - result. This value gets converted and it gets printed at the UART terminal. The application task function is executed inside the while loop

void applicationTask()
{
    SQIFLASH_WriteByte(counter, counter);
    UART1_Write_Text( "rnValue Written : " );
    ByteToStr( counter, txt );
    UART1_Write_Text( txt );
    Delay_ms( 100 ); 

    result = SQIFLASH_ReadByte(counter);
    UART1_Write_Text( "rnValue Read : " );
    ByteToStr( result, txt );
    UART1_Write_Text( txt );
    Delay_ms( 100 ); 

    counter++;

    if (counter == 256) 
    {
        counter = 0;
    }
    Delay_ms( 2000 );
}

Other mikroE Libraries used in the example:

  • UART Conversions

Additional notes and information

Depending on the development board you are using, you may need USB UART clickUSB UART 2 clickor RS232 click to connect to your PC, for development systems with no UART to USB interface available on the board. The terminal available in all MikroElektronika compilers, or any other terminal application of your choice, can be used to read the message.

 

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