X-Git-Url: https://codewiz.org/gitweb?a=blobdiff_plain;f=bertos%2Fdrv%2Flm75.c;h=fd44202492b2c0fe67ae1a2091a0eb26d3a23c0c;hb=7911a6f01bc8a19f220f98e2fdc8595f65996853;hp=d1d0a257fc2f7e6b0b582ac44da716ffc0e0485e;hpb=26d999589c974fc163fdf7e91a439f11d69c3f7b;p=bertos.git

diff --git a/bertos/drv/lm75.c b/bertos/drv/lm75.c
index d1d0a257..fd442024 100644
--- a/bertos/drv/lm75.c
+++ b/bertos/drv/lm75.c
@@ -74,7 +74,6 @@ deg_t lm75_read_1(uint8_t sens_addr)
 deg_t lm75_read_2(I2c *i2c, uint8_t sens_addr)
 {
 	uint8_t data[2];
-	int16_t degree;
 	int16_t deci_degree;
 
 	i2c_start_w(i2c, SELECT_ADDRESS(sens_addr), 1, I2C_NOSTOP);
@@ -85,10 +84,11 @@ deg_t lm75_read_2(I2c *i2c, uint8_t sens_addr)
 	if (i2c_error(i2c))
 		return EOF;
 
-	degree = (int16_t)data[0];
-	deci_degree = (int16_t)(((data[1] >> 7) & 1 ) * 5);
+	deci_degree = ((data[0] << 8) | data[1]);
+	deci_degree >>= 7;
+	deci_degree *= 5;
 
-	LOG_INFO("[%d.%d C]\n", degree, deci_degree);
+	LOG_INFO("[%d.%d C]\n", deci_degree / 10, ABS(deci_degree % 10));
 
-	return degree * 10 + deci_degree;
+	return deci_degree;
 }