bme680/main.c
2023-11-04 03:42:14 +00:00

96 lines
1.9 KiB
C

/* usleep() */
#define _DEFAULT_SOURCE
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include "bme680.h"
#include "i2c.h"
#define DEVICE "/dev/i2c-1"
#define ADDRESS 0x77
int i2c_dev_fd;
int linux_i2c_init (void);
int linux_i2c_read (uint8_t reg, uint8_t *dst, uint32_t size);
int linux_i2c_write (uint8_t reg, uint8_t *src, uint32_t size);
int linux_i2c_deinit (void);
int main(){
bme680_t bme680;
/* 1. Assign functions for interacting with the device */
bme680.dev.init = linux_i2c_init;
bme680.dev.read = linux_i2c_read;
bme680.dev.write = linux_i2c_write;
bme680.dev.deinit = linux_i2c_deinit;
bme680.dev.xfer = NULL;
/* 2. set the device mode */
bme680.mode = BME680_MODE_FLOAT | BME680_I2C;
/* BME680_MODE_INT | BME680_SPI; */
/* 3. initialise device, and check its id */
if (bme680_init(&bme680) != 0) {
fprintf(stderr, "bme680_init()\n");
exit(EXIT_FAILURE);
}
/* 4. read calibration parameters from the device and store in memory */
if (bme680_calibrate(&bme680) != 0) {
fprintf(stderr, "bme680_calibrate()\n");
bme680.dev.deinit();
exit(EXIT_FAILURE);
}
/* 5. set up device config */
bme680.cfg.osrs_t = BME680_OVERSAMPLE_16X;
bme680.cfg.osrs_p = BME680_OVERSAMPLE_8X;
bme680.cfg.osrs_h = BME680_OVERSAMPLE_4X;
return 0;
}
// STUBS
int linux_i2c_init (void) {
puts("linux_i2c_init");
int ret = i2c_init(DEVICE, ADDRESS);
if (ret > 0) {
i2c_dev_fd = ret;
return 0;
}
return 1;
}
int linux_i2c_read (uint8_t reg, uint8_t *dst, uint32_t size) {
puts("linux_i2c_read");
if (i2c_read_reg(i2c_dev_fd, reg, (uint8_t)size, dst) != 0) {
printf("panic read: %d %p %d\n", reg, dst, size);
return 1;
}
return 0;
}
int linux_i2c_write (uint8_t reg, uint8_t *src, uint32_t size) {
puts("linux_i2c_write");
if (i2c_write_reg(i2c_dev_fd, reg, *src) != 0) {
puts("panic!");
return 1;
}
return 0;
}
int linux_i2c_deinit (void) {
close(i2c_dev_fd);
return 0;
}