diff options
| author | Damien George <damien.p.george@gmail.com> | 2019-01-22 00:23:05 +1100 |
|---|---|---|
| committer | Damien George <damien.p.george@gmail.com> | 2019-01-22 00:23:05 +1100 |
| commit | f102ac54e95ca23f266aea30f3de7fd9a39b18a3 (patch) | |
| tree | 01ce359ebbfeb4e744da41954a62b01c30d35871 | |
| parent | eb446ec2276baa7fa1d11056df39de1143487c06 (diff) | |
drivers/dht: Allow open-drain-high call to be DHT specific if needed.
Some ports (eg esp8266) need to have specific behaviour for driving a DHT
reliably.
| -rw-r--r-- | drivers/dht/dht.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/drivers/dht/dht.c b/drivers/dht/dht.c index 5d92ae39a..70371cc01 100644 --- a/drivers/dht/dht.c +++ b/drivers/dht/dht.c @@ -32,6 +32,11 @@ #include "extmod/machine_pulse.h" #include "drivers/dht/dht.h" +// Allow the open-drain-high call to be DHT specific for ports that need it +#ifndef mp_hal_pin_od_high_dht +#define mp_hal_pin_od_high_dht mp_hal_pin_od_high +#endif + STATIC mp_obj_t dht_readinto(mp_obj_t pin_in, mp_obj_t buf_in) { mp_hal_pin_obj_t pin = mp_hal_get_pin_obj(pin_in); mp_hal_pin_open_drain(pin); @@ -44,7 +49,7 @@ STATIC mp_obj_t dht_readinto(mp_obj_t pin_in, mp_obj_t buf_in) { } // issue start command - mp_hal_pin_od_high(pin); + mp_hal_pin_od_high_dht(pin); mp_hal_delay_ms(250); mp_hal_pin_od_low(pin); mp_hal_delay_ms(18); @@ -52,7 +57,7 @@ STATIC mp_obj_t dht_readinto(mp_obj_t pin_in, mp_obj_t buf_in) { mp_uint_t irq_state = mp_hal_quiet_timing_enter(); // release the line so the device can respond - mp_hal_pin_od_high(pin); + mp_hal_pin_od_high_dht(pin); mp_hal_delay_us_fast(10); // wait for device to respond |