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/* $Id: eeprom-1.c,v 1.2.2.3 2008/04/04 08:14:45 dmix Exp $ */
#include <avr/eeprom.h>
#include <stdlib.h>
#include <string.h>
/* Note: GCC permits arithmetic with 'void *'. */
int main ()
{
void *p;
#define MAXLEN (RAMEND > 0x15F ? 260 : (RAMEND - 0x60 - 30))
unsigned char s[E2END > MAXLEN ? MAXLEN : E2END];
/* Fill all EEPROM. */
for (p = 0; p <= (void *)E2END; p++)
eeprom_write_byte (p, ~(int)p);
/* Read bytes. */
for (p = 0; p <= (void *)E2END; p++)
if (eeprom_read_byte (p) != (~(int)p & 0xFF))
exit (__LINE__);
/* Read words. */
for (p = 0; p <= (void *)E2END - 1; p += 2) {
if (eeprom_read_word (p)
!= ((~(unsigned)p & 0xFF) | (~(unsigned)(p+1) & 0xFF) << 8))
{
exit (__LINE__);
}
}
/* Read double words. */
for (p = 0; p <= (void *)E2END - 3; p += 4) {
if (eeprom_read_dword (p)
!= ((~(unsigned)p & 0xFF)
| (~(unsigned)(p+1) & 0xFF) << 8
| (unsigned long)(~(unsigned)(p+2) & 0xFF) << 16
| (unsigned long)(~(unsigned)(p+3) & 0xFF) << 24))
{
exit (__LINE__);
}
}
/* Read blocks. */
for (p = 0; p <= (void *)E2END; ) {
size_t i, n;
if ( (n = E2END + 1 - (unsigned)p) > sizeof(s))
n = sizeof(s);
eeprom_read_block (s, p, n);
for (i = 0; i < n; i++) {
if (s[i] != (~(int)p & 0xFF))
exit (__LINE__);
p += 1;
}
}
/* Write only 1 byte. */
eeprom_write_byte ((unsigned char *)5, 1);
for (p = 0; p <= (void *)E2END; p++) {
if ((unsigned)p != 5
&& eeprom_read_byte (p) != (~(int)p & 0xFF))
{
exit (__LINE__);
}
}
if (eeprom_read_byte ((unsigned char *)5) != 1)
exit (__LINE__);
/* Write only 1 word. */
/* Avr-gcc 4.2.2 produces incorrect code: the comparison of address
with 5 and 6 values is omited. In result exit with error.
Versions 3.3.6, 3.4.6, 4.0.4, 4.1.2, 4.2.3, 4.3.0(pre) give
correct code and are simulated OK. */
eeprom_write_word ((unsigned *)5, 0x1234);
for (p = 0; p <= (void *)E2END; p++) {
if ((unsigned)p != 5
&& (unsigned)p != 6
&& eeprom_read_byte (p) != (~(int)p & 0xFF))
{
exit (__LINE__);
}
}
if (eeprom_read_word ((unsigned *)5) != 0x1234)
exit (__LINE__);
/* Write only 1 double word. */
eeprom_write_dword ((unsigned long *)5, 0x12345678);
for (p = 0; p <= (void *)E2END; p++) {
if (((unsigned)p < 5 || (unsigned)p > 8)
&& eeprom_read_byte (p) != (~(int)p & 0xFF))
{
exit (__LINE__);
}
}
if (eeprom_read_dword ((unsigned long *)5) != 0x12345678)
exit (__LINE__);
/* Write block. */
eeprom_write_block ("\x90\xAB\xCD\xEF\x01", (void *)5, 5);
for (p = 0; p <= (void *)E2END; p++) {
if (((unsigned)p < 5 || (unsigned)p > 9)
&& eeprom_read_byte (p) != (~(int)p & 0xFF))
{
exit (__LINE__);
}
}
eeprom_read_block (s, (const void *)5, 5);
if (memcmp (s, "\x90\xAB\xCD\xEF\x01", 3))
exit (__LINE__);
return 0;
}
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