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dump codes when booting

This commit is contained in:
King Kévin 2014-08-02 16:10:04 -07:00
parent 5a32c0c9a4
commit 9f35b7a8ef
1 changed files with 40 additions and 0 deletions
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40
pic/MDR/MDR.c
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@ -266,6 +266,45 @@ void clear_memory(void)
}
}
/* read all codes from memory */
void dump_codes(void)
{
uint16_t address;
uint8_t stored[3];
/* start at begining of the memory */
send_start();
if (send_byte(0xa0)) { /* write address to eeprom at 0xA0/0x50 */
send_stop();
return;
}
if (send_byte(0x00)) { /* go to address 0x0000 */
send_stop();
return;
}
if (send_byte(0x00)) { /* go to address 0x0000 */
send_stop();
return;
}
/* start reading */
send_start();
if (send_byte(0xa1)) { /* read eeprom at 0xA0/0x50 */
send_stop();
return;
}
/* go through memory */
for (address=0; address<0x7FFF-2; address+=3) {
/* read stored code */
stored[0] = read_byte(1);
stored[1] = read_byte(1);
stored[2] = read_byte(1);
if ((stored[0]&0x80)==0) { /* code always have the MSb to 1 */
read_byte(0); /* send nack */
send_stop(); /* end transaction */
return; /* all codes have been read */
}
}
}
/* funcion called on interrupts */
/* interrupt 0 is only one on PIC16 */
static void interrupt(void) __interrupt 0
@ -308,6 +347,7 @@ void main (void)
uint16_t new = 0; /* is the code new */
init(); /* configure micro-controller */
dump_codes(); /* dump codes when powering up so a logic analyzer can get them */
while (1) { /* a microcontroller runs forever */
/* I can't go to sleep to safe power