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Added check for maxlen

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root 2021-03-08 23:20:57 -06:00
parent a4dda3a5ba
commit 3db0fec267
1 changed files with 3 additions and 4 deletions
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7
ports/raspberrypi/common-hal/pulseio/PulseIn.c
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@ -152,20 +152,19 @@ void common_hal_pulseio_pulsein_interrupt() {
last_level = level; last_level = level;
level_count = 1; level_count = 1;
// ignore pulses that are too long and too short // ignore pulses that are too long and too short
if (result < 2000 && result > 10) { if (result < 4000 && result > 10) {
self->buffer[buf_index] = result; self->buffer[buf_index] = result;
buf_index++; buf_index++;
self->len++; self->len++;
} }
} }
} }
gpio_put(pin_GPIO15.number, true);
// clear interrupt // clear interrupt
irq_clear(self->pio_interrupt); irq_clear(self->pio_interrupt);
hw_clear_bits(&self->state_machine.pio->inte0, 1u << self->state_machine.state_machine); hw_clear_bits(&self->state_machine.pio->inte0, 1u << self->state_machine.state_machine);
self->state_machine.pio->irq = 1u << self->state_machine.state_machine; self->state_machine.pio->irq = 1u << self->state_machine.state_machine;
// check for a pulse thats too long (2000 us) and reset // check for a pulse thats too long (2000 us) or maxlen reached, and reset
if ( level_count > 2000 ) { if (( level_count > 4000 ) || (buf_index >= self->maxlen)) {
pio_sm_set_enabled(self->state_machine.pio, self->state_machine.state_machine, false); pio_sm_set_enabled(self->state_machine.pio, self->state_machine.state_machine, false);
pio_sm_init(self->state_machine.pio, self->state_machine.state_machine, self->state_machine.offset, &self->state_machine.sm_config); pio_sm_init(self->state_machine.pio, self->state_machine.state_machine, self->state_machine.offset, &self->state_machine.sm_config);
pio_sm_restart(self->state_machine.pio,self->state_machine.state_machine); pio_sm_restart(self->state_machine.pio,self->state_machine.state_machine);