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drivers/bmp180: add a delay before accessing calibration registers

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This commit is contained in:
Alexandre Abadie 2016-07-25 15:30:39 +02:00
parent d3fb1d9883
commit 847e6c6494
1 changed files with 3 additions and 1 deletions
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4
drivers/bmp180/bmp180.c
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@ -74,9 +74,11 @@ int bmp180_init(bmp180_t *dev, i2c_t i2c, uint8_t mode)
return -1;
}
/* adding delay before reading calibration values to avoid timing issues */
xtimer_usleep(BMP180_ULTRALOWPOWER_DELAY);
char buffer[22] = {0};
/* Read calibration values, using contiguous register addresses */
i2c_write_byte(dev->i2c_dev, BMP180_ADDR, (char)BMP180_CALIBRATION_AC1);
if (i2c_read_regs(dev->i2c_dev, BMP180_ADDR, BMP180_CALIBRATION_AC1, buffer, 22) < 0) {
DEBUG("[Error] Cannot read calibration registers.\n");
i2c_release(dev->i2c_dev);