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art
Joined: 21 May 2015
Posts: 181
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| Write EEPROM |
 Posted: Sun May 28, 2017 11:40 pm |
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Hi
I would like to write an eeprom starting from address 00 to 0B, but
I found out, only address 00 until 03 were written into the eeprom.
How to make it write all this 12 addresses ?
Here is my code.
| Code: |
#include <18F4550.h>
#DEVICE ADC=10
#fuses HSPLL,NOWDT,PROTECT,NOLVP,NODEBUG,USBDIV,PLL5,CPUDIV1,VREGEN
#use delay(clock=48000000)
#use rs232(baud=9600, xmit=PIN_C6, rcv=PIN_C7,ERRORS)
#include <string.h>
#include <input.c>
#include <stdio.h>
#include <stdlib.h>
#include <usb_cdc.h>
#include "24256.c"
void read_string_eeprom(char *buffer, int16 start_addr, int8 no_chars)
{
int8 count;
for (count=0;count<no_chars;count++)
{
buffer[count]=read_ext_eeprom(start_addr++);
}
buffer[count]='\0';
}
void main()
{
char c;
int8 i ;
unsigned char d;
unsigned char key;
int8 buffer[100];
char m="A";
char n="Z";
char o="S";
char p="K";
usb_init_cs();
while (TRUE)
{
usb_task();
if (usb_cdc_kbhit())
{
c=usb_cdc_getc();
if (c=='\n') {putc('\r'); putc('\n');}
if (c=='\r') {putc('\r'); putc('\n');}
while(true)
{
ART:
d = usb_cdc_getc();
if(d=='W') // push A
{
while (key!=32) // push SPACE BAR to stop
{
if(usb_cdc_kbhit())
{key=usb_cdc_getc();}
{
init_ext_eeprom();
printf(usb_cdc_putc, "\n");
for(i = 0; i<3; i=i+4)
{
write_ext_eeprom(i, m);
write_ext_eeprom(i+1, n);
write_ext_eeprom(i+2, o);
write_ext_eeprom(i+3,p);
}
for(i = 0; i < 12; i=i+4 )
{
read_string_eeprom(buffer, i, 4);
printf(usb_cdc_putc,buffer);
printf(usb_cdc_putc,"\r");
}
}
} key=0; // to initialize 'key' not as SPACE BAR
}
}
}
}
}
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alan
Joined: 12 Nov 2012
Posts: 357
Location: South Africa
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| Posted: Mon May 29, 2017 12:21 am |
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When do you think this will exit the for loop:
| Code: | | for(i = 0; i<3; i=i+4) |
Try
| Code: | | for(i = 0; i<12; i=i+4) |
Regards |
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art
Joined: 21 May 2015
Posts: 181
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| Posted: Mon May 29, 2017 12:52 am |
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Hi alan,
Thanks it work!
Last edited by art on Mon May 29, 2017 1:00 am; edited 1 time in total |
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alan
Joined: 12 Nov 2012
Posts: 357
Location: South Africa
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| Posted: Mon May 29, 2017 12:55 am |
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You really think so?
for starts with i=0;
next round i=0+4 thus i= 4. Is this less than 3 or not? |
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