EmbeddedArtists AB / Mbed 2 deprecated lpc812_exp_solution_spi-e2prom

Solutions for the SPI E2PROM experiments for LPC812 MAX

Dependencies:   mbed

main.cpp@1:819f21483c01, 2013-11-28 (annotated)

Committer:
embeddedartists
Date:
Thu Nov 28 12:17:45 2013 +0000
Revision:
1:819f21483c01
Parent:
0:aa38ad0bf51d 
Renamed the SPI24LC080 class to SPI25LC080 as it is an interface to the 25LC080 chip.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
embeddedartists 0:aa38ad0bf51d 1 #include "mbed.h"
embeddedartists 1:819f21483c01 2 #include "SPI25LC080.h"
embeddedartists 0:aa38ad0bf51d 3
embeddedartists 0:aa38ad0bf51d 4 Serial pc(USBTX, USBRX);
embeddedartists 0:aa38ad0bf51d 5
embeddedartists 1:819f21483c01 6 SPI25LC080 e2prom;
embeddedartists 0:aa38ad0bf51d 7
embeddedartists 0:aa38ad0bf51d 8 #define E2PROM_START_ADDR 0
embeddedartists 0:aa38ad0bf51d 9 #define BUF_SIZE 20
embeddedartists 0:aa38ad0bf51d 10
embeddedartists 0:aa38ad0bf51d 11 static void experiment2()
embeddedartists 0:aa38ad0bf51d 12 {
embeddedartists 0:aa38ad0bf51d 13 uint8_t buf[BUF_SIZE];
embeddedartists 0:aa38ad0bf51d 14 char* magic = "Magic text - 654321";
embeddedartists 0:aa38ad0bf51d 15
embeddedartists 0:aa38ad0bf51d 16 pc.printf("Starting E2PROM test...\n");
embeddedartists 0:aa38ad0bf51d 17
embeddedartists 0:aa38ad0bf51d 18 memset(buf, 0, BUF_SIZE);
embeddedartists 0:aa38ad0bf51d 19
embeddedartists 0:aa38ad0bf51d 20 //read from spi e2prom
embeddedartists 0:aa38ad0bf51d 21 e2prom.read(E2PROM_START_ADDR, buf, BUF_SIZE);
embeddedartists 0:aa38ad0bf51d 22
embeddedartists 0:aa38ad0bf51d 23 //write read bytes on console
embeddedartists 0:aa38ad0bf51d 24 buf[19] = 0; //null terminate string in case it is missing
embeddedartists 0:aa38ad0bf51d 25 pc.printf("String in memory: '%s'\n", buf);
embeddedartists 0:aa38ad0bf51d 26
embeddedartists 0:aa38ad0bf51d 27 //check if expected string
embeddedartists 0:aa38ad0bf51d 28 if (memcmp(buf, magic, strlen(magic)) != 0) {
embeddedartists 0:aa38ad0bf51d 29 memcpy(buf, magic, strlen(magic));
embeddedartists 0:aa38ad0bf51d 30
embeddedartists 0:aa38ad0bf51d 31 //write the correct string in memory
embeddedartists 0:aa38ad0bf51d 32 e2prom.write(E2PROM_START_ADDR, buf, 20);
embeddedartists 0:aa38ad0bf51d 33
embeddedartists 0:aa38ad0bf51d 34 pc.printf("String has been written!");
embeddedartists 0:aa38ad0bf51d 35 }
embeddedartists 0:aa38ad0bf51d 36
embeddedartists 0:aa38ad0bf51d 37 printf("\nDone!");
embeddedartists 0:aa38ad0bf51d 38 while(1)
embeddedartists 0:aa38ad0bf51d 39 ;
embeddedartists 0:aa38ad0bf51d 40 }
embeddedartists 0:aa38ad0bf51d 41
embeddedartists 0:aa38ad0bf51d 42 int main()
embeddedartists 0:aa38ad0bf51d 43 {
embeddedartists 0:aa38ad0bf51d 44 experiment2(); // E2PROM
embeddedartists 0:aa38ad0bf51d 45 }