File content as of revision 18:0e25544cb810:

/*******************************************************************************
* 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 "ds1775.h"
#include "ds1775_cpp.h"
#include "USBSerial.h"

MAX32630FTHR pegasus(MAX32630FTHR::VIO_3V3); 
 
DigitalOut rLED(LED1);
DigitalOut gLED(LED2);
DigitalOut bLED(LED3);
 
I2C i2cBus(P3_4, P3_5);

Serial pc(USBTX, USBRX);    /* Use USB debug probe for serial link */
Serial uart(P2_1, P2_0);
uint32_t blink_cnt;         /* counter for blinking the colors */       
void wait_blink_colors(uint8_t dly) {
    uint32_t i;
    for (i = 0; i < dly; i++) {
        wait(.5);
        if (blink_cnt & 1)
            gLED = !gLED;
        if (blink_cnt & 2)
            bLED = !bLED;
        if (blink_cnt & 4)
            rLED = !rLED;
        blink_cnt++;
            wait(.5);
    }
}

void wait_sec_prompt(uint8_t time)
{
   // Ports and serial connections
    uint32_t i;
    for (i = 0; i < time; i++) {
        pc.printf(".");
        wait_blink_colors(1);
    }
    pc.printf("\r\n");
}


// main() runs in its own thread in the OS
// (note the calls to Thread::wait below for delays)
/**
* @brief Sample main program for DS1775
* @version 1.0000.0003
*
* @details Sample main program for DS1775
* The prints are sent to the terminal window (9600, 8n1).
* The program sets the GPIOs to 3.3V 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;
    uint8_t cfg;
    uint8_t delay = 30;  /* shutdown wait time */
    DigitalOut rLED(LED1, LED_OFF);
    DigitalOut gLED(LED2, LED_OFF);
    DigitalOut bLED(LED3, LED_OFF);
    gLED = LED_ON;
    pc.baud(9600);                    // Baud rate = 115200
    pc.printf("DS1775 DS75 Digital Thermometer and "
        "Thermostat example source code.\r\n");
    pc.printf("\r\n");

    DS1775 temp_sensor(i2cBus, DS1775_I2C_SLAVE_ADR_R0);
    i2cBus.frequency(400000);
    /* Configure for 9 bit resolution, fault filter 1, 
       active low, comparator, continuous,
     */
    temp_sensor.write_cfg_reg(uint8_t(DS1775_CFG_RESOLUTION_9BIT |
        DS1775_CFG_FAULT_FILTER_6 | DS1775_CFG_OS_POLARITY_ACT_LOW |
        DS1775_CFG_COMPARATOR_MODE | DS1775_CFG_CONTINUOUS));
    for (i = 0; i < 10; i++) {
        wait(DS1775_WAIT_CONV_TIME_9BIT);
        temperature =
            temp_sensor.read_reg_as_temperature(DS1775_REG_TEMPERATURE);
        pc.printf("Temperature = %3.4f Celsius, %3.4f Fahrenheit\r\n", 
            temperature, temp_sensor.celsius_to_fahrenheit(temperature));
    }
    temp_sensor.read_cfg_reg(&cfg);
    pc.printf("Configuration Register = 0x%02Xh \r\n", cfg);
    
#if 0
    temp_sensor.write_trip_low_thyst(-63.9375);
    temperature =
        temp_sensor.read_reg_as_temperature(DS1775_REG_THYST_LOW_TRIP);
    pc.printf("Thyst Temperature = %3.4f Celsius, %3.4f Fahrenheit\r\n", 
            temperature, temp_sensor.celsius_to_fahrenheit(temperature));

    temp_sensor.write_trip_high_tos(64.0625f);
    temperature = temp_sensor.read_reg_as_temperature(DS1775_REG_TOS_HIGH_TRIP);
    pc.printf("TOS Temperature = %3.4f Celsius, %3.4f Fahrenheit\r\n", 
            temperature, temp_sensor.celsius_to_fahrenheit(temperature));
    pc.printf("\r\n\r\n");
#endif

    pc.printf("\r\n");

    for (i = 0; i < 8; i++) {
        temp_sensor.write_cfg_reg(uint8_t(DS1775_CFG_RESOLUTION_12BIT |
            DS1775_CFG_FAULT_FILTER_6 | DS1775_CFG_OS_POLARITY_ACT_LOW |
            DS1775_CFG_INTERRUPT_MODE | DS1775_CFG_SHUTDOWN));
        wait_sec_prompt(delay); /*  leave it in shutdown mode for a while */
        /* Configure for 12 bit resolution, fault filter 6, 
           active low, interrupt, continous,
        */
        temp_sensor.write_cfg_reg(uint8_t(DS1775_CFG_RESOLUTION_12BIT |
            DS1775_CFG_FAULT_FILTER_6 | DS1775_CFG_OS_POLARITY_ACT_LOW |
            DS1775_CFG_INTERRUPT_MODE | DS1775_CFG_CONTINUOUS));
        wait(DS1775_WAIT_CONV_TIME_12BIT);
        temperature =
            temp_sensor.read_reg_as_temperature(DS1775_REG_TEMPERATURE);
        pc.printf("Temperature = %3.4f Celsius, %3.4f Fahrenheit\r\n", 
            temperature, temp_sensor.celsius_to_fahrenheit(temperature));
    }
    temp_sensor.write_cfg_reg(uint8_t(DS1775_CFG_RESOLUTION_12BIT |
        DS1775_CFG_FAULT_FILTER_6 | DS1775_CFG_OS_POLARITY_ACT_LOW |
        DS1775_CFG_INTERRUPT_MODE | DS1775_CFG_SHUTDOWN));
    temp_sensor.read_cfg_reg(&cfg);
    pc.printf("Configuration Register = 0x%02Xh \r\n", cfg);

    pc.printf("\r\n\r\n");

#if 0
    temp_sensor.write_trip_low_thyst(-55.0f);
    temperature = 
        temp_sensor.read_reg_as_temperature(DS1775_REG_THYST_LOW_TRIP);
    pc.printf("Thyst Temperature = %3.4f Celsius, %3.4f Fahrenheit\r\n", 
            temperature, temp_sensor.celsius_to_fahrenheit(temperature));

    temp_sensor.write_trip_high_tos(125.0f);
    temperature = temp_sensor.read_reg_as_temperature(DS1775_REG_TOS_HIGH_TRIP);
    pc.printf("TOS Temperature = %3.4f Celsius, %3.4f Fahrenheit\r\n", 
            temperature, temp_sensor.celsius_to_fahrenheit(temperature));
    pc.printf("\r\n\r\n");
#endif

    /***************************************************************************
     * Call the C code version of the driver
     ***************************************************************************
     */
#include "ds1775_c.h"
    pc.printf("C implementation of the code\r\n");
    ds1775_init(DS1775_I2C_SLAVE_ADR_R0);
    /* Configure for 9 bit resolution, fault filter 1, 
       active low, comparator, continuous,
     */
    ds1775_write_cfg_reg(uint8_t(DS1775_CFG_RESOLUTION_9BIT |
        DS1775_CFG_FAULT_FILTER_6 | DS1775_CFG_OS_POLARITY_ACT_LOW |
        DS1775_CFG_COMPARATOR_MODE | DS1775_CFG_CONTINUOUS), i2cBus);
    for (i = 0; i < 10; i++) {
        wait(DS1775_WAIT_CONV_TIME_9BIT);
        temperature = ds1775_read_reg_as_temperature(DS1775_REG_TEMPERATURE,
            i2cBus);
        pc.printf("Temperature = %3.4f Celsius, %3.4f Fahrenheit\r\n", 
            temperature, temp_sensor.celsius_to_fahrenheit(temperature));
    }

    ds1775_read_cfg_reg(&cfg, i2cBus);
    pc.printf("Configuration Register = 0x%02Xh \r\n", cfg);

#if 0
    ds1775_write_trip_low_thyst(-63.9375, i2cBus);
    temperature = ds1775_read_reg_as_temperature(DS1775_REG_THYST_LOW_TRIP,
        i2cBus);
    pc.printf("Thyst Temperature = %3.4f Celsius, %3.4f Fahrenheit\r\n", 
            temperature, ds1775_celsius_to_fahrenheit(temperature));

    ds1775_write_trip_high_tos(64.0625f, i2cBus);
    temperature = ds1775_read_reg_as_temperature(DS1775_REG_TOS_HIGH_TRIP,
        i2cBus);
    pc.printf("TOS Temperature = %3.4f Celsius, %3.4f Fahrenheit\r\n", 
            temperature, ds1775_celsius_to_fahrenheit(temperature));
#endif

    pc.printf("\r\n");
    for (i = 0; i < 8; i++) {
        ds1775_write_cfg_reg(uint8_t(DS1775_CFG_RESOLUTION_12BIT |
            DS1775_CFG_FAULT_FILTER_6 | DS1775_CFG_OS_POLARITY_ACT_LOW |
            DS1775_CFG_INTERRUPT_MODE | DS1775_CFG_SHUTDOWN), i2cBus);
        wait_sec_prompt(delay); /*  leave it in shutdown mode for a while */
        /* Configure for 12 bit resolution, fault filter 6, 
           active low, interrupt, continous,
        */
        ds1775_write_cfg_reg(uint8_t(DS1775_CFG_RESOLUTION_12BIT |
            DS1775_CFG_FAULT_FILTER_6 | DS1775_CFG_OS_POLARITY_ACT_LOW |
            DS1775_CFG_INTERRUPT_MODE | DS1775_CFG_CONTINUOUS),
            i2cBus);
        wait(DS1775_WAIT_CONV_TIME_12BIT);
        temperature = ds1775_read_reg_as_temperature(DS1775_REG_TEMPERATURE,
            i2cBus);
        pc.printf("Temperature = %3.4f Celsius, %3.4f Fahrenheit\r\n", 
            temperature, temp_sensor.celsius_to_fahrenheit(temperature));
    }
    ds1775_write_cfg_reg(uint8_t(DS1775_CFG_RESOLUTION_12BIT |
        DS1775_CFG_FAULT_FILTER_6 | DS1775_CFG_OS_POLARITY_ACT_LOW |
        DS1775_CFG_INTERRUPT_MODE | DS1775_CFG_SHUTDOWN), i2cBus);
    ds1775_read_cfg_reg(&cfg, i2cBus);
    pc.printf("Configuration Register = 0x%02Xh \r\n", cfg);

#if 0
    ds1775_write_trip_low_thyst(-55, i2cBus);
    temperature = ds1775_read_reg_as_temperature(DS1775_REG_THYST_LOW_TRIP,
        i2cBus);
    pc.printf("Thyst Temperature = %3.4f Celsius, %3.4f Fahrenheit\r\n", 
            temperature, ds1775_celsius_to_fahrenheit(temperature));

    ds1775_write_trip_high_tos(125.0f, i2cBus);
    temperature = ds1775_read_reg_as_temperature(DS1775_REG_TOS_HIGH_TRIP,
        i2cBus);
    pc.printf("TOS Temperature = %3.4f Celsius, %3.4f Fahrenheit\r\n", 
            temperature, ds1775_celsius_to_fahrenheit(temperature));
#endif
    pc.printf("\r\n\r\n\r\n");


    while (true) {  // Blink the green LED 
        gLED = !gLED;
        wait(0.5);
    }
}