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Decoder must not write more bit than requested

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This commit is contained in:
Henry Gabryjelski 2024-03-13 23:23:31 -07:00
commit c7d7680cd6
1 changed files with 12 additions and 4 deletions
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8
armsrc/em4x70.c
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@ -687,11 +687,15 @@ static int em4x70_receive(uint8_t *bits, size_t length) {
// pulse length 1.5 -> 2 bits + flip edge detection // pulse length 1.5 -> 2 bits + flip edge detection
if (edge == FALLING_EDGE) { if (edge == FALLING_EDGE) {
bits[bit_pos++] = 0; bits[bit_pos++] = 0;
if (bit_pos < length) {
bits[bit_pos++] = 0; bits[bit_pos++] = 0;
}
edge = RISING_EDGE; edge = RISING_EDGE;
} else { } else {
bits[bit_pos++] = 1; bits[bit_pos++] = 1;
if (bit_pos < length) {
bits[bit_pos++] = 1; bits[bit_pos++] = 1;
}
edge = FALLING_EDGE; edge = FALLING_EDGE;
} }
@ -700,11 +704,15 @@ static int em4x70_receive(uint8_t *bits, size_t length) {
// pulse length of 2 -> two bits // pulse length of 2 -> two bits
if (edge == FALLING_EDGE) { if (edge == FALLING_EDGE) {
bits[bit_pos++] = 0; bits[bit_pos++] = 0;
if (bit_pos < length) {
bits[bit_pos++] = 1; bits[bit_pos++] = 1;
}
} else { } else {
bits[bit_pos++] = 1; bits[bit_pos++] = 1;
if (bit_pos < length) {
bits[bit_pos++] = 0; bits[bit_pos++] = 0;
} }
}
} else { } else {
// Listen Window, or invalid bit // Listen Window, or invalid bit