djsundog/circuitpython
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Increased possible pulsein length to 32 ms.

Browse Source
This commit is contained in:
root 2021-04-25 21:38:57 -05:00
parent d5768c5338
commit 5bd1da21a2
1 changed files with 6 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
ports/raspberrypi/common-hal/pulseio/PulseIn.c
View File

@ -39,6 +39,8 @@
pulseio_pulsein_obj_t *save_self;
#define NO_PIN 0xff
#define MAX_PULSE 32678
#define MIN_PULSE 10
volatile bool last_level;
volatile uint16_t level_count = 0;
volatile uint16_t result = 0;
@ -139,15 +141,15 @@ void common_hal_pulseio_pulsein_interrupt() {
last_level = level;
level_count = 1;
// ignore pulses that are too long and too short
if (result < 4000 && result > 10) {
if (result < MAX_PULSE && result > MIN_PULSE) {
self->buffer[buf_index] = result;
buf_index++;
self->len++;
}
}
}
// check for a pulse thats too long (4000 us) or maxlen reached, and reset
if ((level_count > 4000) || (buf_index >= self->maxlen)) {
// 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);
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);
@ -180,6 +182,7 @@ void common_hal_pulseio_pulsein_resume(pulseio_pulsein_obj_t *self,
void common_hal_pulseio_pulsein_clear(pulseio_pulsein_obj_t *self) {
self->start = 0;
self->len = 0;
buf_index = 0;
}
uint16_t common_hal_pulseio_pulsein_popleft(pulseio_pulsein_obj_t *self) {