c - Reading EEPROM AVR -

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i have problem when receive data eeprom.

first made following code :

#include <avr/io.h> #include <avr/eeprom.h>  char     name[5]   eemem   = "a001"; char     unit[2]   eemem   = "c"; uint16_t cyclicity eemem   = 2000;  int main(void) {     while(1)     {         //todo:: please write application code      } }

and have extracted .hex , .eep files. wrote files avrdude. first write wrong because put .hex file on eerpom:w , destroy bytes, not important. after write using correct command , see part of data in next print screen.

dumpeeprom

i saving number , c , a001 . see in first row there ..c.a001. 9 bytes wrote.

now in program! try this:

char     eemem name[5]  ;   char     eemem unit[2]  ; uint16_t eemem cyclicity;   void _vreadeeprom(char *au8name,char *au8unit,uint16_t *u16cyclicity) {   eeprom_read_block((void *)&au8name,(const void *)name,5);   eeprom_read_block((void *)&au8unit,(const void *)unit,2);   *u16cyclicity = eeprom_read_word(&cyclicity); }

the parametres in global struct :

typedef struct  {     uint16_t u16cyclicity;     uint16_t u16value;     char     pu8name[5];     char     pu8unit[2]; }eeh_layout;

in while of main sent on "broken uart"(i have topic on that). until code usart sent value , garbage..but when put usart not sending anything, , beleive cause because of 0(null) reading eeprom. cpu working because have 1 sec timer interupts blink led. working, probelm got 0 eeporm.

also not sure uderstand how write eeprom because everywhere lot of tutorials on eeprom telling how config eeprom , read. not want have params in code, want them eeprom write alone!

edit: uint16 parameter ok, manage read on uart , 2000; chars not ok, null.

edit: test ok, problem params of function not use ok. change function pau8name[] instead of *pau8name, because pointer bad initialized!!

always aware of pointers!

the problem uninitialized pointer. see edit in post!


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