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Update glitch.c

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rehius 2023-05-26 22:54:08 +00:00 committed by GitHub
parent 25d9389924
commit 1a39e9b46d
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1 changed files with 5 additions and 6 deletions
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glitch.c
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@ -145,13 +145,12 @@ void inc_tries()
} }
// random() for glitch offset array generation // random() for glitch offset array generation
static uint32_t get_random_word() { static uint32_t get_random_word(int cycles) {
uint32_t byte; uint32_t byte;
int cycles = 32;
assert(rosc_hw->status & ROSC_STATUS_ENABLED_BITS); assert(rosc_hw->status & ROSC_STATUS_ENABLED_BITS);
for(int i=0; i < cycles; i++) { for(int i=0; i < cycles; i++) {
byte = ((byte << 1) | rosc_hw->randombit);
busy_wait_at_least_cycles(100); busy_wait_at_least_cycles(100);
byte = ((byte << 1) | rosc_hw->randombit);
} }
return byte; return byte;
} }
@ -162,7 +161,7 @@ void prepare_random_array()
for(int i = 0; i < OFFSET_CNT; i++) for(int i = 0; i < OFFSET_CNT; i++)
offsets_array[i] = OFFSET_MIN + OFFSET_DIV*i; offsets_array[i] = OFFSET_MIN + OFFSET_DIV*i;
for (int i = OFFSET_CNT - 1; i > 0; i--) { for (int i = OFFSET_CNT - 1; i > 0; i--) {
size_t j = get_random_word() % (i+1); size_t j = get_random_word(32) % (i+1);
int t = offsets_array[j]; int t = offsets_array[j];
offsets_array[j] = offsets_array[i]; offsets_array[j] = offsets_array[i];
offsets_array[i] = t; offsets_array[i] = t;
@ -178,7 +177,7 @@ bool glitch_try_offset(int offset, int * width, int edge_limit) {
inc_tries(); inc_tries();
while (1) { while (1) {
reset_cpu(); reset_cpu();
int gres = do_glitch(offset, *width, 300, 6); int gres = do_glitch(offset + get_random_word(3), *width, 300, 6);
if (gres == GLITCH_RESULT_MISSING) if (gres == GLITCH_RESULT_MISSING)
missing_count +=1; // MMC has failed to initialize missing_count +=1; // MMC has failed to initialize
else else