David Jung / Mbed OS DS7505_Temperature_Sensor_Low_Power

Example main.c code for the Maxim Integrated DS7505 low voltage high accurate temperature sensor. Hosted on the MAX32630FTHR. C and C++ sample source code provided.

Dependencies:   DS7505_Low_Voltage_Temperature_Sensor max32630fthr USBDevice

Files at this revision

API Documentation at this revision

Revision 2:2236f57e3547, committed 2019-04-27

Comitter:
phonemacro
Date:
Sat Apr 27 19:45:57 2019 +0000
Parent:
1:0efc9f52dfdf
Commit message:
Updated for shutdown mode

Changed in this revision

main.cpp Show annotated file Show diff for this revision Revisions of this file 
diff -r 0efc9f52dfdf -r 2236f57e3547 main.cpp
--- a/main.cpp	Sat Apr 27 09:58:16 2019 +0000
+++ b/main.cpp	Sat Apr 27 19:45:57 2019 +0000
@@ -97,7 +97,7 @@
     uint8_t i2c_addr = DS7505_I2C_SLAVE_ADR_00;
     DS7505 temp_sensor(i2cBus, i2c_addr);
     i2cBus.frequency(400000);
-    /* Configure for time out enabled, normal format, fault filter 6,
+    /* Configure for 9 bit, fault filter 6,
        active low polarity, comparator mode, continuous
      */
     temp_sensor.write_cfg_reg(uint8_t(
@@ -128,19 +128,20 @@
 #endif
 
     pc.printf("\r\n");
-    temp_sensor.write_cfg_reg(uint8_t(
-        DS7505_CFG_RESOLUTION_12BIT | DS7505_CFG_FAULT_FILTER_4 |
-        DS7505_CFG_OS_POLARITY_ACT_LOW | DS7505_CFG_INTERRUPT_MODE |
-        DS7505_CFG_SHUTDOWN));
     for (i = 0; i < 8; i++) {
+        /* Configure to shutdown mode */
+        temp_sensor.write_cfg_reg(uint8_t(
+            DS7505_CFG_RESOLUTION_12BIT | DS7505_CFG_FAULT_FILTER_4 |
+            DS7505_CFG_OS_POLARITY_ACT_LOW | DS7505_CFG_INTERRUPT_MODE |
+            DS7505_CFG_SHUTDOWN));
         wait_sec_prompt(WAIT_TIME); /*  leave it in shutdown mode for a while */
-        /* Configure for one shot, time out disabled, extended format, fault filter 4,
-           active low polarity, comparator mode, shutdown
+        /* Configure for 12 BIT, fault filter 4,
+           active low polarity, interrupt mode, continuous
          */
         temp_sensor.write_cfg_reg(uint8_t(
             DS7505_CFG_RESOLUTION_12BIT | DS7505_CFG_FAULT_FILTER_4 |
             DS7505_CFG_OS_POLARITY_ACT_LOW | DS7505_CFG_INTERRUPT_MODE |
-            DS7505_CFG_SHUTDOWN));
+            DS7505_CFG_CONTINUOUS));
         wait(DS7505_WAIT_CONV_TIME_12BIT);
         temperature =
             temp_sensor.read_reg_as_temperature(DS7505_REG_TEMPERATURE);
@@ -173,7 +174,7 @@
 #include "ds7505_c.h"
     pc.printf("C implementation of the code\r\n");
     ds7505_init(i2c_addr);
-    /* Configure for time out enabled, normal format, fault filter 6,
+    /* Configure for 9 bit, fault filter 6,
        active low polarity, comparator mode, continuous
      */
     ds7505_write_cfg_reg(uint8_t(
@@ -206,19 +207,20 @@
 #endif
 
     pc.printf("\r\n");
-    ds7505_write_cfg_reg(uint8_t(
-        DS7505_CFG_RESOLUTION_12BIT | DS7505_CFG_FAULT_FILTER_4 |
-        DS7505_CFG_OS_POLARITY_ACT_LOW | DS7505_CFG_INTERRUPT_MODE |
-        DS7505_CFG_SHUTDOWN), i2cBus);
     for (i = 0; i < 8; i++) {
+        /* Configure for shutdown mode */
+        ds7505_write_cfg_reg(uint8_t(
+            DS7505_CFG_RESOLUTION_12BIT | DS7505_CFG_FAULT_FILTER_4 |
+            DS7505_CFG_OS_POLARITY_ACT_LOW | DS7505_CFG_INTERRUPT_MODE |
+            DS7505_CFG_SHUTDOWN), i2cBus);
         wait_sec_prompt(WAIT_TIME); /*  leave it in shutdown mode for a while */
-        /* Configure for one shot, time out disabled, extended format, fault filter 4,
-           active low polarity, comparator mode, shutdown
+        /* Configure for 12 bits, fault filter 4,
+           active low polarity, interrupt mode, continuous
          */
         ds7505_write_cfg_reg(uint8_t(
             DS7505_CFG_RESOLUTION_12BIT | DS7505_CFG_FAULT_FILTER_4 |
             DS7505_CFG_OS_POLARITY_ACT_LOW | DS7505_CFG_INTERRUPT_MODE |
-            DS7505_CFG_SHUTDOWN), i2cBus);
+            DS7505_CFG_CONTINUOUS), i2cBus);
         wait(DS7505_WAIT_CONV_TIME_12BIT);
         temperature = ds7505_read_reg_as_temperature(DS7505_REG_TEMPERATURE,
             i2cBus);