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samples: bme280: update to new DT API

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Use instance zero of the compatible to get the device instead of
fixing a label. Print the used label for help debugging, and the
results of finding the device (or not), with a hint about what might
have gone wrong in case of failure.

Signed-off-by: Martí Bolívar <marti.bolivar@nordicsemi.no>
This commit is contained in:
Martí Bolívar 2020-04-06 16:22:39 -07:00 • committed by Kumar Gala
commit 1d1ed154da
1 changed files with 15 additions and 4 deletions
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19
samples/sensor/bme280/src/main.c
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@ -6,19 +6,30 @@
#include <zephyr.h> #include <zephyr.h>
#include <device.h> #include <device.h>
#include <devicetree.h>
#include <drivers/sensor.h> #include <drivers/sensor.h>
#define BME280 DT_INST(0, bosch_bme280)
#if DT_HAS_NODE(BME280)
#define BME280_LABEL DT_LABEL(BME280)
#else
#error Your devicetree has no enabled nodes with compatible "bosch,bme280"
#define BME280_LABEL "<none>"
#endif
void main(void) void main(void)
{ {
struct device *dev = device_get_binding("BME280"); struct device *dev = device_get_binding(BME280_LABEL);
if (dev == NULL) { if (dev == NULL) {
printk("Could not get BME280 device\n"); printk("No device \"%s\" found; did initialization fail?\n",
BME280_LABEL);
return; return;
} else {
printk("Found device \"%s\"\n", BME280_LABEL);
} }
printk("dev %p name %s\n", dev, dev->config->name);
while (1) { while (1) {
struct sensor_value temp, press, humidity; struct sensor_value temp, press, humidity;