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return success of save_code

This commit is contained in:
King Kévin 2014-08-02 15:47:37 -07:00
parent 2ef68f1a1c
commit 6e68b14cc9
1 changed files with 17 additions and 12 deletions
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29
pic/MDR/MDR.c
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@ -186,8 +186,13 @@ void write_code(uint16_t address)
}
/* look in the memory for the code (global variable)
* if not present, write it a the next free memory space */
void save_code()
* if not present, write it a the next free memory space
* return 0 if the code is already in EEPROM
* return 1 if the code is new and saved
* return 2 if error occured
* return 3 if no space in memory
*/
uint8_t save_code(void)
{
uint16_t address;
uint8_t stored[3];
@ -195,21 +200,21 @@ void save_code()
send_start();
if (send_byte(0xa0)) { /* write address to eeprom at 0xA0/0x50 */
send_stop();
return;
return 2;
}
if (send_byte(0x00)) { /* go to address 0x0000 */
send_stop();
return;
return 2;
}
if (send_byte(0x00)) { /* go to address 0x0000 */
send_stop();
return;
return 2;
}
/* start reading */
send_start();
if (send_byte(0xa1)) { /* read eeprom at 0xA0/0x50 */
send_stop();
return;
return 2;
}
/* go through memory */
for (address=0; address<0x7FFF-2; address+=3) {
@ -221,13 +226,14 @@ void save_code()
read_byte(0); /* send a NACK to stop reading */
send_stop(); /* finish transaction */
write_code(address); /* write code at this space */
return;
return 1;
} else if (stored[0]==code[0] && stored[1]==code[1] && stored[2]==code[2]) { /* code already stored */
read_byte(0); /* send a NACK to stop reading */
send_stop(); /* finish transaction */
return;
return 0;
}
}
return 3;
}
void clear_memory(void)
@ -254,9 +260,7 @@ void clear_memory(void)
send_byte(0x00); /* clear byte */
if ((address%0x40)==0x3f) { /* end of page */
send_stop(); /* finish transaction */
for (wait=0; wait<1024; wait++) { /* wait for eeprom to be writen */
wait;
}
for (wait=0; wait<1024; wait++); /* wait for eeprom to be writen */
}
}
}
@ -300,6 +304,7 @@ void main (void)
uint8_t rx = 0; /* are we receiving a pulse */
uint8_t bit = 0; /* the current received bit */
uint8_t time = 0; /* time since previous bitframe start, in 0.256ms steps */
uint16_t new = 0; /* is the code new */
init(); /* configure micro-controller */
@ -335,7 +340,7 @@ void main (void)
}
if (bit==24) { /* received all 24 bits */
led_on();
save_code();
save_code(); /* save code in external EEPROM */
led_off();
}
}