Hotboards MX / Mbed 2 deprecated Hotboards_eeprom_write_array

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@0:1caeae863b7f, 2016-02-05 (annotated)

Committer:
Hotboards
Date:
Fri Feb 05 21:35:42 2016 +0000
Revision:
0:1caeae863b7f
first Release: Hotboards_eeprom_write_array

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Hotboards 0:1caeae863b7f 1 /*
Hotboards 0:1caeae863b7f 2 Hotboards eeprom Library - write_array
Hotboards 0:1caeae863b7f 3 Demonstrates the use a spi eeprom. The Hotboards_eeprom
Hotboards 0:1caeae863b7f 4 library works with all Microchip 25xxx serial memory series
Hotboards 0:1caeae863b7f 5 like the one presented eeprom board (http://www.hotboards.org).
Hotboards 0:1caeae863b7f 6 This sketch write an array into a memory, then, read back the data
Hotboards 0:1caeae863b7f 7 and print them to a serial port.
Hotboards 0:1caeae863b7f 8
Hotboards 0:1caeae863b7f 9 The circuit:
Hotboards 0:1caeae863b7f 10 * VDD --> 3.3v
Hotboards 0:1caeae863b7f 11 * SO --> PB_14
Hotboards 0:1caeae863b7f 12 * SI --> PB_15
Hotboards 0:1caeae863b7f 13 * SCK --> PB_13
Hotboards 0:1caeae863b7f 14 * CS --> PC_4
Hotboards 0:1caeae863b7f 15 * GND --> GND
Hotboards 0:1caeae863b7f 16
Hotboards 0:1caeae863b7f 17 Library created by Diego from Hotboards
Hotboards 0:1caeae863b7f 18 example added by Pedro from Hotboards
Hotboards 0:1caeae863b7f 19 */
Hotboards 0:1caeae863b7f 20 #include "mbed.h"
Hotboards 0:1caeae863b7f 21 #include "Hotboards_eeprom.h"
Hotboards 0:1caeae863b7f 22 /*Open an instance of serial port*/
Hotboards 0:1caeae863b7f 23 Serial pc(USBTX,USBRX);
Hotboards 0:1caeae863b7f 24 /* initialize an instance of SPI bus,setting the SPI pins*/
Hotboards 0:1caeae863b7f 25 SPI device(PB_15,PB_14,PB_13); /* SO, SI, SCK*/
Hotboards 0:1caeae863b7f 26 /*initialize the library with the numbers of the interface pins*/
Hotboards 0:1caeae863b7f 27 Hotboards_eeprom eeprom(device,PC_4,HT_EEPROM25xx_32Kb); /* (spi,Cs,Density) */
Hotboards 0:1caeae863b7f 28
Hotboards 0:1caeae863b7f 29 int main()
Hotboards 0:1caeae863b7f 30 {
Hotboards 0:1caeae863b7f 31 /*SPI transfer at 8 bits, MODE = 3*/
Hotboards 0:1caeae863b7f 32 device.format(8,3);
Hotboards 0:1caeae863b7f 33 /* set the spi frequency to 5MHz */
Hotboards 0:1caeae863b7f 34 device.frequency(5000000);
Hotboards 0:1caeae863b7f 35 /*initialize CS pin*/
Hotboards 0:1caeae863b7f 36 eeprom.init();
Hotboards 0:1caeae863b7f 37 /*array to be write*/
Hotboards 0:1caeae863b7f 38 uint8_t write_array[]= "[25AA320-EXAMPLE]\n";
Hotboards 0:1caeae863b7f 39 /*array for read */
Hotboards 0:1caeae863b7f 40 uint8_t read_array[20];
Hotboards 0:1caeae863b7f 41
Hotboards 0:1caeae863b7f 42 /*write the entire array starting at 0 adress*/
Hotboards 0:1caeae863b7f 43 eeprom.write(0,write_array,sizeof(write_array));
Hotboards 0:1caeae863b7f 44
Hotboards 0:1caeae863b7f 45 /*read back to "read_array"*/
Hotboards 0:1caeae863b7f 46 eeprom.read(0,(uint8_t*)read_array,20);
Hotboards 0:1caeae863b7f 47
Hotboards 0:1caeae863b7f 48 /*print adress and data to serial port*/
Hotboards 0:1caeae863b7f 49 printf("ADRESS|DATA \n");
Hotboards 0:1caeae863b7f 50 for(int j=0;j<17;j++)
Hotboards 0:1caeae863b7f 51 {
Hotboards 0:1caeae863b7f 52 printf("%2d %c \n",j,read_array[j]);
Hotboards 0:1caeae863b7f 53 }
Hotboards 0:1caeae863b7f 54
Hotboards 0:1caeae863b7f 55 while(1)
Hotboards 0:1caeae863b7f 56 {
Hotboards 0:1caeae863b7f 57 /*loop*/
Hotboards 0:1caeae863b7f 58 }
Hotboards 0:1caeae863b7f 59 }