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Firmware: SuperCIC detection support

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This commit is contained in:
Maximilian Rehkopf 2011-08-17 00:08:40 +02:00
parent 50bca22b6a
commit 8647a252c4
2 changed files with 14 additions and 9 deletions
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17
src/cic.c
View File

@ -4,7 +4,7 @@
#include "uart.h"
#include "cic.h"
char *cicstatenames[3] = { "CIC_OK", "CIC_FAIL", "CIC_PAIR" };
char *cicstatenames[4] = { "CIC_OK", "CIC_FAIL", "CIC_PAIR", "CIC_SCIC" };
void print_cic_state() {
printf("CIC state: %s\n", get_cic_statename(get_cic_state()));
@ -21,21 +21,22 @@ enum cicstates get_cic_state() {
state_old = BITBAND(SNES_CIC_STATUS_REG->FIOPIN, SNES_CIC_STATUS_BIT);
/* this loop samples at ~10MHz */
for(count=0; count<1000; count++) {
for(count=0; count<CIC_SAMPLECOUNT; count++) {
state = BITBAND(SNES_CIC_STATUS_REG->FIOPIN, SNES_CIC_STATUS_BIT);
if(state != state_old) {
togglecount++;
}
state_old = state;
}
if(togglecount > 20) {
printf("%ld\n", togglecount);
printf("%ld\n", togglecount);
/* CIC_TOGGLE_THRESH_PAIR > CIC_TOGGLE_THRESH_SCIC */
if(togglecount > CIC_TOGGLE_THRESH_PAIR) {
return CIC_PAIR;
}
if(state) {
} else if(togglecount > CIC_TOGGLE_THRESH_SCIC) {
return CIC_SCIC;
} else if(state) {
return CIC_OK;
}
return CIC_FAIL;
} else return CIC_FAIL;
}
void cic_init(int allow_pairmode) {

6
src/cic.h
View File

@ -1,10 +1,14 @@
#ifndef _CIC_H
#define _CIC_H
#define CIC_SAMPLECOUNT (100000)
#define CIC_TOGGLE_THRESH_PAIR (2500)
#define CIC_TOGGLE_THRESH_SCIC (10)
#include <arm/NXP/LPC17xx/LPC17xx.h>
#include "bits.h"
enum cicstates { CIC_OK = 0, CIC_FAIL, CIC_PAIR };
enum cicstates { CIC_OK = 0, CIC_FAIL, CIC_PAIR, CIC_SCIC };
enum cic_region { CIC_NTSC = 0, CIC_PAL };
void print_cic_state(void);