main.cpp

00001 /*******************************************************************************
00002 * Copyright (C) 2019 Maxim Integrated Products, Inc., All Rights Reserved.
00003 *
00004 * Permission is hereby granted, free of charge, to any person obtaining a
00005 * copy of this software and associated documentation files (the "Software"),
00006 * to deal in the Software without restriction, including without limitation
00007 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
00008 * and/or sell copies of the Software, and to permit persons to whom the
00009 * Software is furnished to do so, subject to the following conditions:
00010 *
00011 * The above copyright notice and this permission notice shall be included
00012 * in all copies or substantial portions of the Software.
00013 *
00014 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
00015 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
00016 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
00017 * IN NO EVENT SHALL MAXIM INTEGRATED BE LIABLE FOR ANY CLAIM, DAMAGES
00018 * OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
00019 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
00020 * OTHER DEALINGS IN THE SOFTWARE.
00021 *
00022 * Except as contained in this notice, the name of Maxim Integrated
00023 * Products, Inc. shall not be used except as stated in the Maxim Integrated
00024 * Products, Inc. Branding Policy.
00025 *
00026 * The mere transfer of this software does not imply any licenses
00027 * of trade secrets, proprietary technology, copyrights, patents,
00028 * trademarks, maskwork rights, or any other form of intellectual
00029 * property whatsoever. Maxim Integrated Products, Inc. retains all
00030 * ownership rights.
00031 *******************************************************************************
00032 */
00033 #include "mbed.h"
00034 #include "max32630fthr.h"
00035 #include "max31875.h"
00036 #include "USBSerial.h"
00037  
00038 MAX32630FTHR pegasus(MAX32630FTHR::VIO_1V8); 
00039  
00040 DigitalOut rLED(LED1);
00041 DigitalOut gLED(LED2);
00042 DigitalOut bLED(LED3);
00043  
00044 I2C i2cBus(P3_4, P3_5);
00045 
00046 // main() runs in its own thread in the OS
00047 // (note the calls to Thread::wait below for delays)
00048 /**
00049 * @brief Sample main program for MAX31875
00050 * @version 1.0000.0000
00051 *
00052 * @details Sample main program for MAX31875
00053 * The prints are sent to the terminal window (9600, 8n1).
00054 * The program sets the GPIOs to 1.8V and the program
00055 * configures the chip and reads temperatures.
00056 * To run the program, drag and drop the .bin file into the 
00057 * DAPLINK folder. After it finishes flashing, cycle the power or 
00058 * reset the Pegasus (MAX32630FTHR) after flashing by pressing the button on
00059 * the Pegasus next to the battery connector or the button
00060 * on the MAXREFDES100HDK.
00061 */
00062 int main()
00063 {
00064     uint32_t i;
00065     float temperature;
00066     uint16_t cfg;
00067     DigitalOut rLED(LED1, LED_OFF);
00068     DigitalOut gLED(LED2, LED_OFF);
00069     DigitalOut bLED(LED3, LED_OFF);
00070     gLED = LED_ON;
00071     printf("MAX31875 Small Package Temperature Sensor example source code.\r\n");
00072     printf("\r\n");
00073 
00074     MAX31875 temp_sensor(i2cBus, MAX31875_I2C_SLAVE_ADR_R0);
00075     i2cBus.frequency(1000000);
00076    
00077     /* Configure for fault filter 1, comparator, continuous,
00078      * normal format, 8 sps, 12 bit resolution
00079      */
00080     temp_sensor.write_cfg(uint16_t(MAX31875_CFG_FAULT_FILTER_1 | 
00081         MAX31875_CFG_COMPARATOR_MODE | MAX31875_CFG_CONTINUOUS | 
00082         MAX31875_CFG_NORMAL_FORMAT | MAX31875_CFG_CONV_RATE_8 | 
00083         MAX31875_CFG_RESOLUTION_12BIT));
00084     for (i = 0; i < 10; i++) {
00085         wait(MAX31875_WAIT_CONV_RATE_8);
00086         temperature = temp_sensor.read_reg_as_temperature(MAX31875_REG_TEMPERATURE);
00087         printf("Temperature = %3.4f Celsius, %3.4f Fahrenheit\r\n", 
00088             temperature, temp_sensor.celsius_to_fahrenheit(temperature));
00089     }
00090     temp_sensor.read_reg(&cfg, MAX31875_REG_CONFIGURATION);
00091     printf("Configuration Register = 0x%04Xh \r\n", cfg);
00092 
00093     printf("\r\n");
00094 
00095 
00096     /* Configure for fault filter 4, interrupt, shutdown,
00097      * extended format, 0.25 sps, 10 bit resolution, start one-shot
00098      */
00099     for (i = 0; i < 5; i++) {
00100         temp_sensor.write_cfg(uint16_t(MAX31875_CFG_FAULT_FILTER_4 | 
00101             MAX31875_CFG_INTERRUPT_MODE | MAX31875_CFG_SHUTDOWN |
00102             MAX31875_CFG_EXTENDED_FORMAT| MAX31875_CFG_CONV_RATE_0_25 | 
00103             MAX31875_CFG_RESOLUTION_10BIT | MAX31875_CFG_ONE_SHOT_START));
00104         wait(MAX31875_WAIT_CONV_RATE_0_25);
00105         temperature = temp_sensor.read_reg_as_temperature(MAX31875_REG_TEMPERATURE);
00106         printf("Temperature = %3.4f Celsius, %3.4f Fahrenheit\r\n", 
00107             temperature, temp_sensor.celsius_to_fahrenheit(temperature));
00108     }
00109     temp_sensor.read_reg(&cfg, MAX31875_REG_CONFIGURATION);
00110     printf("Configuration Register = 0x%04Xh \r\n", cfg);
00111 
00112     printf("\r\n\r\n");
00113 #if 0
00114     temp_sensor.write_trip_low(3.0625f);
00115     temp_sensor.read_reg(&cfg, MAX31875_REG_CONFIGURATION);
00116     temperature = temp_sensor.read_reg_as_temperature(MAX31875_REG_THYST);
00117     printf("Thyst Temperature = %3.4f Celsius, %3.4f Fahrenheit\r\n", 
00118             temperature, temp_sensor.celsius_to_fahrenheit(temperature));
00119 
00120     temp_sensor.write_trip_high(129.0625f);
00121     temperature = temp_sensor.read_reg_as_temperature(MAX31875_REG_TOS);
00122     printf("TOS Temperature = %3.4f Celsius, %3.4f Fahrenheit\r\n", 
00123             temperature, temp_sensor.celsius_to_fahrenheit(temperature));
00124     printf("\r\n\r\n");
00125 #endif
00126     while (true) {  // Blink the green LED 
00127         gLED = !gLED;
00128         wait(0.5);
00129     }
00130 }
00131  
00132