Cameron/pico-examples
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

fixup examples based on default pin #define-s and also support them being undefined

Browse Source
This commit is contained in:
graham sanderson
2021-02-28 09:00:36 -06:00
committed by Graham Sanderson
parent 82c7a506de
commit 3c82d8aa2b
10 changed files with 101 additions and 43 deletions
Download Patch File Download Diff File Expand all files Collapse all files

13
gpio/dht_sensor/dht.c
View File

@@ -9,7 +9,10 @@
#include "pico/stdlib.h"
#include "hardware/gpio.h"
const uint LED_PIN = PICO_DEFAULT_LED_PIN;
#ifdef PICO_DEFAULT_LED_PIN
#define LED_PIN PICO_DEFAULT_LED_PIN
#endif
const uint DHT_PIN = 15;
const uint MAX_TIMINGS = 85;
@@ -22,9 +25,11 @@ void read_from_dht(dht_reading *result);
int main() {
stdio_init_all();
gpio_init(LED_PIN);
gpio_init(DHT_PIN);
#ifdef LED_PIN
gpio_init(LED_PIN);
gpio_set_dir(LED_PIN, GPIO_OUT);
#endif
while (1) {
dht_reading reading;
read_from_dht(&reading);
@@ -46,7 +51,9 @@ void read_from_dht(dht_reading *result) {
sleep_ms(20);
gpio_set_dir(DHT_PIN, GPIO_IN);
#ifdef LED_PIN
gpio_put(LED_PIN, 1);
#endif
for (uint i = 0; i < MAX_TIMINGS; i++) {
uint count = 0;
while (gpio_get(DHT_PIN) == last) {
@@ -63,7 +70,9 @@ void read_from_dht(dht_reading *result) {
j++;
}
}
#ifdef LED_PIN
gpio_put(LED_PIN, 0);
#endif
if ((j >= 40) && (data[4] == ((data[0] + data[1] + data[2] + data[3]) & 0xFF))) {
result->humidity = (float) ((data[0] << 8) + data[1]) / 10;