X-Git-Url: https://codewiz.org/gitweb?a=blobdiff_plain;f=bertos%2Fdrv%2Flm75.c;h=fd44202492b2c0fe67ae1a2091a0eb26d3a23c0c;hb=e25abecb6a6ff52917d44d1331e5af831aeceb9c;hp=449a4dd2e1f541643be1bd7c0bc0c3a505704bce;hpb=80fef33198b667b00c49bc2f0b32a2aa0258d8a0;p=bertos.git

diff --git a/bertos/drv/lm75.c b/bertos/drv/lm75.c
index 449a4dd2..fd442024 100644
--- a/bertos/drv/lm75.c
+++ b/bertos/drv/lm75.c
@@ -52,33 +52,43 @@
 #include <cfg/log.h>
 
 #include <drv/i2c.h>
+#include <drv/ntc.h> // Macro and data type to manage celsius degree
 
 #define SELECT_ADDRESS(addr)   LM75_ADDRESS_BYTE | (addr << 1)
+#define LM75_ADDRESS_BYTE    0x91
+#define LM75_PAD_BYTE        0x0
 
-deci_celsius_t lm75_read(addr_t sens_addr)
+
+#if !CONFIG_I2C_DISABLE_OLD_API
+
+deg_t lm75_read_1(uint8_t sens_addr)
+{
+	return lm75_read_2(&local_i2c_old_api, sens_addr);
+}
+#endif /* !CONFIG_I2C_DISABLE_OLD_API */
+
+
+/*
+ * New API
+ */
+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(SELECT_ADDRESS(sens_addr));
-	i2c_put(LM75_PAD_BYTE);
-	i2c_start_r(SELECT_ADDRESS(sens_addr));
-	i2c_recv(data, sizeof(data));
+	i2c_start_w(i2c, SELECT_ADDRESS(sens_addr), 1, I2C_NOSTOP);
+	i2c_putc(i2c, LM75_PAD_BYTE);
+	i2c_start_r(i2c, SELECT_ADDRESS(sens_addr), sizeof(data), I2C_STOP);
+	i2c_read(i2c, data, sizeof(data));
 
-	degree = (int16_t)data[0];
-	deci_degree = (int16_t)(((data[1] >> 7) & 1 ) * 5);
+	if (i2c_error(i2c))
+		return EOF;
 
-	LOG_INFO("[%d.%d C]\n", degree, deci_degree);
+	deci_degree = ((data[0] << 8) | data[1]);
+	deci_degree >>= 7;
+	deci_degree *= 5;
 
-	return degree * 10 + deci_degree;
-}
+	LOG_INFO("[%d.%d C]\n", deci_degree / 10, ABS(deci_degree % 10));
 
-void lm75_init(void)
-{
-	// Check dependence
-	MOD_CHECK(i2c);
-	LM75_HW_INIT();
+	return deci_degree;
 }
-
-