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drivers: sensor: dht: Fix fetch fail when config hw cycles=32768

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When config hw cycles=32768 max_wait_cycles maybe small than 60us.
The fix change the condition,make sure the wait time exceeds 80us.

Fixed #9816

Signed-off-by: Frank Li <lgl88911@163.com>
This commit is contained in:
Frank Li 2018-09-06 21:49:10 +08:00 • committed by Maureen Helm
commit 70efac6e90
1 changed files with 1 additions and 1 deletions
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drivers/sensor/dht/dht.c
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@ -39,7 +39,7 @@ static s8_t dht_measure_signal_duration(struct dht_data *drv_data,
gpio_pin_read(drv_data->gpio, CONFIG_DHT_GPIO_PIN_NUM, &val); gpio_pin_read(drv_data->gpio, CONFIG_DHT_GPIO_PIN_NUM, &val);
elapsed_cycles = k_cycle_get_32() - start_cycles; elapsed_cycles = k_cycle_get_32() - start_cycles;
if (elapsed_cycles >= max_wait_cycles) { if (elapsed_cycles > max_wait_cycles) {
return -1; return -1;
} }
} while (val == signal_val); } while (val == signal_val);