Diff: main.cpp

Revision:

2:32c0d11d8c0d

Parent:

1:c5ac6967b6bf

Child:

3:587c7c740902

--- a/main.cpp	Mon Feb 04 23:39:11 2019 +0000
+++ b/main.cpp	Wed Feb 13 05:02:26 2019 +0000
@@ -48,7 +48,7 @@
 // (note the calls to Thread::wait below for delays)
 /**
 * @brief Sample main program for MAX31875
-* @version 1.0000.0001
+* @version 1.0000.0002
 *
 * @details Sample main program for MAX31875
 * The prints are sent to the terminal window (9600, 8n1).
@@ -82,6 +82,7 @@
         MAX31875_CFG_COMPARATOR_MODE | MAX31875_CFG_CONTINUOUS | 
         MAX31875_CFG_NORMAL_FORMAT | MAX31875_CFG_CONV_RATE_8 | 
         MAX31875_CFG_RESOLUTION_12BIT));
+
     for (i = 0; i < 10; i++) {
         wait(MAX31875_WAIT_CONV_RATE_8);
         temperature = temp_sensor.read_reg_as_temperature(MAX31875_REG_TEMPERATURE);
@@ -90,14 +91,27 @@
     }
     temp_sensor.read_reg(&cfg, MAX31875_REG_CONFIGURATION);
     printf("Configuration Register = 0x%04Xh \r\n", cfg);
+#if 0
+    temp_sensor.write_trip_low(-63.9375);
+    wait(0.03);
+    temperature = temp_sensor.read_reg_as_temperature(MAX31875_REG_THYST_LOW_TRIP);
+    printf("Thyst Temperature = %3.4f Celsius, %3.4f Fahrenheit\r\n", 
+            temperature, temp_sensor.celsius_to_fahrenheit(temperature));
+
+    temp_sensor.write_trip_high(64.0625f);
+    wait(0.03);
+    temperature = temp_sensor.read_reg_as_temperature(MAX31875_REG_TOS_HIGH_TRIP);
+    printf("TOS Temperature = %3.4f Celsius, %3.4f Fahrenheit\r\n", 
+            temperature, temp_sensor.celsius_to_fahrenheit(temperature));
+    printf("\r\n\r\n");
+#endif
 
     printf("\r\n");
 
-
     /* Configure for fault filter 4, interrupt, shutdown,
      * extended format, 0.25 sps, 10 bit resolution, start one-shot
      */
-    for (i = 0; i < 5; i++) {
+    for (i = 0; i < 2; i++) {
         temp_sensor.write_cfg(uint16_t(MAX31875_CFG_FAULT_FILTER_4 | 
             MAX31875_CFG_INTERRUPT_MODE | MAX31875_CFG_SHUTDOWN |
             MAX31875_CFG_EXTENDED_FORMAT| MAX31875_CFG_CONV_RATE_0_25 | 
@@ -111,15 +125,18 @@
     printf("Configuration Register = 0x%04Xh \r\n", cfg);
 
     printf("\r\n\r\n");
+
 #if 0
-    temp_sensor.write_trip_low(3.0625f);
+    temp_sensor.write_trip_low(-127.9375);
+    wait(0.03);
     temp_sensor.read_reg(&cfg, MAX31875_REG_CONFIGURATION);
-    temperature = temp_sensor.read_reg_as_temperature(MAX31875_REG_THYST);
+    temperature = temp_sensor.read_reg_as_temperature(MAX31875_REG_THYST_LOW_TRIP);
     printf("Thyst Temperature = %3.4f Celsius, %3.4f Fahrenheit\r\n", 
             temperature, temp_sensor.celsius_to_fahrenheit(temperature));
 
     temp_sensor.write_trip_high(129.0625f);
-    temperature = temp_sensor.read_reg_as_temperature(MAX31875_REG_TOS);
+    wait(0.03);
+    temperature = temp_sensor.read_reg_as_temperature(MAX31875_REG_TOS_HIGH_TRIP);
     printf("TOS Temperature = %3.4f Celsius, %3.4f Fahrenheit\r\n", 
             temperature, temp_sensor.celsius_to_fahrenheit(temperature));
     printf("\r\n\r\n");
@@ -130,6 +147,7 @@
      ***************************************************************************
      */
 #include "max31875_c.h"
+    printf("C implementation of the code\r\n");
     max31875_init(MAX31875_I2C_SLAVE_ADR_R0);
     /* Configure for fault filter 1, comparator, continuous,
      * normal format, 8 sps, 12 bit resolution
@@ -148,6 +166,52 @@
     max31875_read_reg(&cfg, MAX31875_REG_CONFIGURATION, i2cBus);
     printf("Configuration Register = 0x%04Xh \r\n", cfg);
 
+#if 0
+    max31875_write_trip_low(-63.9375, i2cBus);
+    wait(0.03);
+    temperature = max31875_read_reg_as_temperature(MAX31875_REG_THYST_LOW_TRIP, i2cBus);
+    printf("Thyst Temperature = %3.4f Celsius, %3.4f Fahrenheit\r\n", 
+            temperature, max31875_celsius_to_fahrenheit(temperature));
+
+    max31875_write_trip_high(64.0625f, i2cBus);
+    wait(0.03);
+    temperature = max31875_read_reg_as_temperature(MAX31875_REG_TOS_HIGH_TRIP, i2cBus);
+    printf("TOS Temperature = %3.4f Celsius, %3.4f Fahrenheit\r\n", 
+            temperature, max31875_celsius_to_fahrenheit(temperature));
+#endif
+
+    printf("\r\n");
+    for (i = 0; i < 2; i++) {
+        max31875_write_cfg(uint16_t(MAX31875_CFG_FAULT_FILTER_4 | 
+            MAX31875_CFG_INTERRUPT_MODE | MAX31875_CFG_SHUTDOWN |
+            MAX31875_CFG_EXTENDED_FORMAT| MAX31875_CFG_CONV_RATE_0_25 | 
+            MAX31875_CFG_RESOLUTION_10BIT | MAX31875_CFG_ONE_SHOT_START),
+            i2cBus);
+        wait(MAX31875_WAIT_CONV_RATE_0_25);
+        temperature = max31875_read_reg_as_temperature(MAX31875_REG_TEMPERATURE,
+            i2cBus);
+        printf("Temperature = %3.4f Celsius, %3.4f Fahrenheit\r\n", 
+            temperature, temp_sensor.celsius_to_fahrenheit(temperature));
+    }
+    max31875_read_reg(&cfg, MAX31875_REG_CONFIGURATION, i2cBus);
+    printf("Configuration Register = 0x%04Xh \r\n", cfg);
+
+#if 0
+    temp_sensor.write_trip_low(-127.9375);
+    max31875_write_trip_low(-127.9375, i2cBus);
+    wait(0.03);
+    temperature = max31875_read_reg_as_temperature(MAX31875_REG_THYST_LOW_TRIP, i2cBus);
+    printf("Thyst Temperature = %3.4f Celsius, %3.4f Fahrenheit\r\n", 
+            temperature, max31875_celsius_to_fahrenheit(temperature));
+
+    max31875_write_trip_high(129.0625f, i2cBus);
+    wait(0.03);
+    temperature = max31875_read_reg_as_temperature(MAX31875_REG_TOS_HIGH_TRIP, i2cBus);
+    printf("TOS Temperature = %3.4f Celsius, %3.4f Fahrenheit\r\n", 
+            temperature, max31875_celsius_to_fahrenheit(temperature));
+#endif
+    printf("\r\n\r\n\r\n");
+
 
     while (true) {  // Blink the green LED 
         gLED = !gLED;