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improved error output

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byteneumann 2019-07-31 19:01:48 +00:00
parent 64356f5f7e
commit 47256731aa
1 changed files with 20 additions and 10 deletions
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30
examples/linux_userspace.c
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@ -4,7 +4,7 @@
tested: Raspberry Pi. tested: Raspberry Pi.
Use like: ./bme280 /dev/i2c-0 Use like: ./bme280 /dev/i2c-0
*/ */
#include "bme280.h"
#include <string.h> #include <string.h>
#include <stdio.h> #include <stdio.h>
#include <stdlib.h> #include <stdlib.h>
@ -13,14 +13,17 @@
#include <sys/ioctl.h> #include <sys/ioctl.h>
#include <sys/types.h> #include <sys/types.h>
#include <fcntl.h> #include <fcntl.h>
#include "bme280.h"
int fd; int fd;
int8_t user_i2c_read(uint8_t id, uint8_t reg_addr, uint8_t *data, uint16_t len) int8_t user_i2c_read(uint8_t id, uint8_t reg_addr, uint8_t *data, uint16_t len)
{ {
write(fd, &reg_addr, 1); if (write(fd, &reg_addr, sizeof(reg_addr)) < sizeof(reg_addr))
read(fd, data, len); return BME280_E_COMM_FAIL;
return 0; if (read(fd, data, len) < len)
return BME280_E_COMM_FAIL;
return BME280_OK;
} }
void user_delay_ms(uint32_t period) void user_delay_ms(uint32_t period)
@ -31,12 +34,13 @@ void user_delay_ms(uint32_t period)
int8_t user_i2c_write(uint8_t id, uint8_t reg_addr, uint8_t *data, uint16_t len) int8_t user_i2c_write(uint8_t id, uint8_t reg_addr, uint8_t *data, uint16_t len)
{ {
int8_t *buf; int8_t *buf;
buf = malloc(len +1); buf = malloc(len + 1);
buf[0] = reg_addr; buf[0] = reg_addr;
memcpy(buf + 1, data, len); memcpy(buf + 1, data, len);
write(fd, buf, len + 1); if (write(fd, buf, len + 1) < len)
return BME280_E_COMM_FAIL;
free(buf); free(buf);
return 0; return BME280_OK;
} }
void print_sensor_data(struct bme280_data *comp_data) void print_sensor_data(struct bme280_data *comp_data)
@ -65,7 +69,7 @@ int8_t stream_sensor_data_forced_mode(struct bme280_dev *dev)
rslt = bme280_set_sensor_settings(settings_sel, dev); rslt = bme280_set_sensor_settings(settings_sel, dev);
if (rslt != BME280_OK) if (rslt != BME280_OK)
{ {
fprintf(stderr, "Failed to set sensor settings."); fprintf(stderr, "Failed to set sensor settings (code %+d).", rslt);
return rslt; return rslt;
} }
@ -75,12 +79,18 @@ int8_t stream_sensor_data_forced_mode(struct bme280_dev *dev)
{ {
rslt = bme280_set_sensor_mode(BME280_FORCED_MODE, dev); rslt = bme280_set_sensor_mode(BME280_FORCED_MODE, dev);
if (rslt != BME280_OK) if (rslt != BME280_OK)
{
fprintf(stderr, "Failed to set sensor mode (code %+d).", rslt);
break; break;
}
/* Wait for the measurement to complete and print data @25Hz */ /* Wait for the measurement to complete and print data @25Hz */
dev->delay_ms(40); dev->delay_ms(40);
rslt = bme280_get_sensor_data(BME280_ALL, &comp_data, dev); rslt = bme280_get_sensor_data(BME280_ALL, &comp_data, dev);
if (rslt != BME280_OK) if (rslt != BME280_OK)
{
fprintf(stderr, "Failed to get sensor data (code %+d).", rslt);
break; break;
}
print_sensor_data(&comp_data); print_sensor_data(&comp_data);
} }
return rslt; return rslt;
@ -126,13 +136,13 @@ int main(int argc, char* argv[])
rslt = bme280_init(&dev); rslt = bme280_init(&dev);
if (rslt != BME280_OK) if (rslt != BME280_OK)
{ {
fprintf(stderr, "Failed to initialize the device.\n"); fprintf(stderr, "Failed to initialize the device (code %+d).\n", rslt);
exit(1); exit(1);
} }
rslt = stream_sensor_data_forced_mode(&dev); rslt = stream_sensor_data_forced_mode(&dev);
if (rslt != BME280_OK) if (rslt != BME280_OK)
{ {
fprintf(stderr, "Failed to stream sensor data.\n"); fprintf(stderr, "Failed to stream sensor data (code %+d).\n", rslt);
exit(1); exit(1);
} }
return 0; return 0;