This sketch write an array into a memory, then, read back the data and print them to a serial port.
Dependencies: Hotboards_eeprom mbed
main.cpp
- Committer:
- Hotboards
- Date:
- 2016-02-05
- Revision:
- 0:1caeae863b7f
File content as of revision 0:1caeae863b7f:
/* Hotboards eeprom Library - write_array Demonstrates the use a spi eeprom. The Hotboards_eeprom library works with all Microchip 25xxx serial memory series like the one presented eeprom board (http://www.hotboards.org). This sketch write an array into a memory, then, read back the data and print them to a serial port. The circuit: * VDD --> 3.3v * SO --> PB_14 * SI --> PB_15 * SCK --> PB_13 * CS --> PC_4 * GND --> GND Library created by Diego from Hotboards example added by Pedro from Hotboards */ #include "mbed.h" #include "Hotboards_eeprom.h" /*Open an instance of serial port*/ Serial pc(USBTX,USBRX); /* initialize an instance of SPI bus,setting the SPI pins*/ SPI device(PB_15,PB_14,PB_13); /* SO, SI, SCK*/ /*initialize the library with the numbers of the interface pins*/ Hotboards_eeprom eeprom(device,PC_4,HT_EEPROM25xx_32Kb); /* (spi,Cs,Density) */ int main() { /*SPI transfer at 8 bits, MODE = 3*/ device.format(8,3); /* set the spi frequency to 5MHz */ device.frequency(5000000); /*initialize CS pin*/ eeprom.init(); /*array to be write*/ uint8_t write_array[]= "[25AA320-EXAMPLE]\n"; /*array for read */ uint8_t read_array[20]; /*write the entire array starting at 0 adress*/ eeprom.write(0,write_array,sizeof(write_array)); /*read back to "read_array"*/ eeprom.read(0,(uint8_t*)read_array,20); /*print adress and data to serial port*/ printf("ADRESS|DATA \n"); for(int j=0;j<17;j++) { printf("%2d %c \n",j,read_array[j]); } while(1) { /*loop*/ } }