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Increased max pulse to 65535 us

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root 2021-04-26 18:52:15 -05:00
parent 5bd1da21a2
commit 91739de71a
1 changed files with 11 additions and 6 deletions
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17
ports/raspberrypi/common-hal/pulseio/PulseIn.c
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@ -39,11 +39,11 @@
pulseio_pulsein_obj_t *save_self;
#define NO_PIN 0xff
#define MAX_PULSE 32678
#define MAX_PULSE 65535
#define MIN_PULSE 10
volatile bool last_level;
volatile uint16_t level_count = 0;
volatile uint16_t result = 0;
volatile uint32_t level_count = 0;
volatile uint32_t result = 0;
volatile uint16_t buf_index = 0;
uint16_t pulsein_program[] = {
@ -140,14 +140,19 @@ void common_hal_pulseio_pulsein_interrupt() {
result = level_count;
last_level = level;
level_count = 1;
// ignore pulses that are too long and too short
if (result < MAX_PULSE && result > MIN_PULSE) {
self->buffer[buf_index] = result;
// Pulses that are londger than MAX_PULSE will return MAX_PULSE
if (result > MAX_PULSE ) {
result = MAX_PULSE;
}
// ignore pulses that are too short
if (result <= MAX_PULSE && result > MIN_PULSE) {
self->buffer[buf_index] = (uint16_t) result;
buf_index++;
self->len++;
}
}
}
// check for a pulse thats too long (MAX_PULSE us) or maxlen reached, and reset
if ((level_count > MAX_PULSE) || (buf_index >= self->maxlen)) {
pio_sm_set_enabled(self->state_machine.pio, self->state_machine.state_machine, false);