altos: Conditional byte swapping in mpu6000 driver

Only needed on LSB machines.

Signed-off-by: Keith Packard <keithp@keithp.com>

diff --git a/src/drivers/ao_mpu6000.c b/src/drivers/ao_mpu6000.c
index d27c42b04c83187bab6c0d5e0c8a1c8f3d3d5f4b..eb4044be225ebd257aa058eaaf7615fe193f560a 100644 (file)
--- a/src/drivers/ao_mpu6000.c
+++ b/src/drivers/ao_mpu6000.c
@@ -73,11 +73,13 @@ ao_mpu6000_sample(struct ao_mpu6000_sample *sample)
        int             i = sizeof (*sample) / 2;
 
        ao_mpu6000_read(MPU6000_ACCEL_XOUT_H, sample, sizeof (*sample));
-       /* byte swap (sigh) */
+#if __BYTE_ORDER == __LITTLE_ENDIAN
+       /* byte swap */
        while (i--) {
                uint16_t        t = *d;
                *d++ = (t >> 8) | (t << 8);
        }
+#endif
 }
 
 #define G      981     /* in cm/s² */