Diff: main.cpp

Revision:

0:77036686489d

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Sun Feb 03 23:56:45 2019 +0000
@@ -0,0 +1,132 @@
+/*******************************************************************************
+* Copyright (C) 2019 Maxim Integrated Products, Inc., All Rights Reserved.
+*
+* Permission is hereby granted, free of charge, to any person obtaining a
+* copy of this software and associated documentation files (the "Software"),
+* to deal in the Software without restriction, including without limitation
+* the rights to use, copy, modify, merge, publish, distribute, sublicense,
+* and/or sell copies of the Software, and to permit persons to whom the
+* Software is furnished to do so, subject to the following conditions:
+*
+* The above copyright notice and this permission notice shall be included
+* in all copies or substantial portions of the Software.
+*
+* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+* IN NO EVENT SHALL MAXIM INTEGRATED BE LIABLE FOR ANY CLAIM, DAMAGES
+* OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+* OTHER DEALINGS IN THE SOFTWARE.
+*
+* Except as contained in this notice, the name of Maxim Integrated
+* Products, Inc. shall not be used except as stated in the Maxim Integrated
+* Products, Inc. Branding Policy.
+*
+* The mere transfer of this software does not imply any licenses
+* of trade secrets, proprietary technology, copyrights, patents,
+* trademarks, maskwork rights, or any other form of intellectual
+* property whatsoever. Maxim Integrated Products, Inc. retains all
+* ownership rights.
+*******************************************************************************
+*/
+#include "mbed.h"
+#include "max32630fthr.h"
+#include "max31875.h"
+#include "USBSerial.h"
+ 
+MAX32630FTHR pegasus(MAX32630FTHR::VIO_1V8); 
+ 
+DigitalOut rLED(LED1);
+DigitalOut gLED(LED2);
+DigitalOut bLED(LED3);
+ 
+I2C i2cBus(P3_4, P3_5);
+
+// main() runs in its own thread in the OS
+// (note the calls to Thread::wait below for delays)
+/**
+* @brief Sample main program for MAX31875
+* @version 1.0000.0000
+*
+* @details Sample main program for MAX31875
+* The prints are sent to the terminal window (9600, 8n1).
+* The program sets the GPIOs to 1.8V and the program
+* configures the chip and reads temperatures.
+* To run the program, drag and drop the .bin file into the 
+* DAPLINK folder. After it finishes flashing, cycle the power or 
+* reset the Pegasus (MAX32630FTHR) after flashing by pressing the button on
+* the Pegasus next to the battery connector or the button
+* on the MAXREFDES100HDK.
+*/
+int main()
+{
+    uint32_t i;
+    float temperature;
+    uint16_t cfg;
+    DigitalOut rLED(LED1, LED_OFF);
+    DigitalOut gLED(LED2, LED_OFF);
+    DigitalOut bLED(LED3, LED_OFF);
+    gLED = LED_ON;
+    printf("MAX31875 Small Package Temperature Sensor example source code.\r\n");
+    printf("\r\n");
+
+    MAX31875 temp_sensor(i2cBus, MAX31875_I2C_SLAVE_ADR_R0);
+    i2cBus.frequency(1000000);
+   
+    /* Configure for fault filter 1, comparator, continuous,
+     * normal format, 8 sps, 12 bit resolution
+     */
+    temp_sensor.write_cfg(uint16_t(MAX31875_CFG_FAULT_FILTER_1 | 
+        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);
+        printf("Temperature = %3.4f Celsius, %3.4f Fahrenheit\r\n", 
+            temperature, temp_sensor.celsius_to_fahrenheit(temperature));
+    }
+    temp_sensor.read_reg(&cfg, MAX31875_REG_CONFIGURATION);
+    printf("Configuration Register = 0x%04Xh \r\n", cfg);
+
+    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++) {
+        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 | 
+            MAX31875_CFG_RESOLUTION_10BIT | MAX31875_CFG_ONE_SHOT_START));
+        wait(MAX31875_WAIT_CONV_RATE_0_25);
+        temperature = temp_sensor.read_reg_as_temperature(MAX31875_REG_TEMPERATURE);
+        printf("Temperature = %3.4f Celsius, %3.4f Fahrenheit\r\n", 
+            temperature, temp_sensor.celsius_to_fahrenheit(temperature));
+    }
+    temp_sensor.read_reg(&cfg, MAX31875_REG_CONFIGURATION);
+    printf("Configuration Register = 0x%04Xh \r\n", cfg);
+
+    printf("\r\n\r\n");
+#if 0
+    temp_sensor.write_trip_low(3.0625f);
+    temp_sensor.read_reg(&cfg, MAX31875_REG_CONFIGURATION);
+    temperature = temp_sensor.read_reg_as_temperature(MAX31875_REG_THYST);
+    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);
+    printf("TOS Temperature = %3.4f Celsius, %3.4f Fahrenheit\r\n", 
+            temperature, temp_sensor.celsius_to_fahrenheit(temperature));
+    printf("\r\n\r\n");
+#endif
+    while (true) {  // Blink the green LED 
+        gLED = !gLED;
+        wait(0.5);
+    }
+}
+ 
+ 
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