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MRAM click
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Author: MikroElektronika Team
Last Updated: 2017-12-28
Category: Storage
Downloaded: 1211 times
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MRAM click is a memory storage device with 32KB of memory space. The used memory module can withstand an unlimited number of write cycles, it has data retention period greater than 20 years and it can read and write to random addresses with no delay.
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Library Description
Initializes and defines SPI bus driver and driver functions which are used for storing data to memory and for reading memory.
Library also communicates with the Status register. For more details check the documentation.
Key functions
uint8_t mram_checkStatusBit(uint8_t status_bit) - The function checks one bit from the Status register determined by the function parameter.
void mram_readDataBytes(const uint16_t address, uint8_t *buffer, const uint16_t nBytes) - The function reads a number of bytes determined by the nBytes parameter from the memory to the buffer with start address determined by the address parameter.
void mram_writeDataBytes(const uint16_t address, uint8_t *buffer, const uint16_t nBytes) - The function writes a number of bytes determined by the nBytes parameter from the buffer to memory with start address determined by address parameter.
void mram_enableHoldMode(uint8_t state) - A low on the Hold pin interrupts a memory operation for another task.
Examples Description
The application is composed of three sections :
- System Initialization - Initializes peripherals and pins.
- Application Initialization - Initializes click driver.
- Application Task - Writes 6 bytes of buffer data in the memory with start address 0x0000. Then reads 3 bytes from the memory with start address 0x0002 and shows the result on USB UART.
void applicationTask()
{
uint8_t numberBytesWrite;
uint8_t numberBytesRead;
char txt[20] = {0};
uint16_t i;
numberBytesWrite = 6;
numberBytesRead = 3;
mram_writeDataBytes(0x0000, &data_write[0], numberBytesWrite);
mram_readDataBytes(0x0002, &data_read[0], numberBytesRead);
for(i = 0; i < numberBytesRead; i++)
{
WordToStr(data_read[i], txt);
mikrobus_logWrite(txt, _LOG_LINE);
}
Delay_ms(2000);
}
Additional notes and information
Depending on the development board you are using, you may need USB UART click, USB UART 2 click or 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.