Mac Lobdell / Mbed OS AT45_spi_flash_example

Very simple example application for using AT45 SPI Flash

Dependencies:   AT45

main.cpp@0:cb29c01320b1, 2017-11-14 (annotated)

Committer:
maclobdell
Date:
Tue Nov 14 14:58:48 2017 +0000
Revision:
0:cb29c01320b1
Very simple example application that extracts details from AT45 SPI Flash and writes/reads a string to it.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
maclobdell 0:cb29c01320b1 1 #include "mbed.h"
maclobdell 0:cb29c01320b1 2
maclobdell 0:cb29c01320b1 3 #include "AT45.h"
maclobdell 0:cb29c01320b1 4
maclobdell 0:cb29c01320b1 5 /* Tested on FRDM-KW24D512 */
maclobdell 0:cb29c01320b1 6
maclobdell 0:cb29c01320b1 7 SPI spi(D11, D12, D13);
maclobdell 0:cb29c01320b1 8 AT45 spif(&spi, D10);
maclobdell 0:cb29c01320b1 9
maclobdell 0:cb29c01320b1 10 DigitalOut myled(LED1);
maclobdell 0:cb29c01320b1 11
maclobdell 0:cb29c01320b1 12 int main() {
maclobdell 0:cb29c01320b1 13
maclobdell 0:cb29c01320b1 14 printf("spif test\n\r");
maclobdell 0:cb29c01320b1 15
maclobdell 0:cb29c01320b1 16 printf("spif size: %d bytes\n\r", spif.device_size());
maclobdell 0:cb29c01320b1 17 printf("spif page erase size: %d bytes\n\r", spif.pagesize());
maclobdell 0:cb29c01320b1 18 printf("spif pages: %d\n\r", spif.pages());
maclobdell 0:cb29c01320b1 19 printf("spif block erase size: 4096 bytes\n\r");
maclobdell 0:cb29c01320b1 20 printf("spif blocks: %d\n\r", spif.blocks());
maclobdell 0:cb29c01320b1 21 printf("id: %d\n\r", spif.id());
maclobdell 0:cb29c01320b1 22
maclobdell 0:cb29c01320b1 23 int pagesize = spif.pagesize();
maclobdell 0:cb29c01320b1 24
maclobdell 0:cb29c01320b1 25 // Write "Hello World!" to a block
maclobdell 0:cb29c01320b1 26 char *buffer = (char*) malloc(pagesize);
maclobdell 0:cb29c01320b1 27 sprintf(buffer, "Hello World!\n");
maclobdell 0:cb29c01320b1 28 spif.page_erase(3);
maclobdell 0:cb29c01320b1 29 spif.write_page(buffer, 3);
maclobdell 0:cb29c01320b1 30
maclobdell 0:cb29c01320b1 31 char *buffer2 = (char*) malloc(pagesize);
maclobdell 0:cb29c01320b1 32 // Read back what was stored
maclobdell 0:cb29c01320b1 33 spif.read_page(buffer2, 3);
maclobdell 0:cb29c01320b1 34
maclobdell 0:cb29c01320b1 35 printf("%s", buffer2);
maclobdell 0:cb29c01320b1 36
maclobdell 0:cb29c01320b1 37 while(1) {
maclobdell 0:cb29c01320b1 38 myled = 1;
maclobdell 0:cb29c01320b1 39 wait(0.2);
maclobdell 0:cb29c01320b1 40 myled = 0;
maclobdell 0:cb29c01320b1 41 wait(0.2);
maclobdell 0:cb29c01320b1 42
maclobdell 0:cb29c01320b1 43 }
maclobdell 0:cb29c01320b1 44 }