28004x内部温度采样无法找到相关.c文件

您可以参考下

C:\ti\c2000\C2000Ware_2_00_00_02\driverlib\f28004x\examples\adc

内的例程

//#############################################################################
//
// FILE:   adc_ex3_temp_sensor.c
//
// TITLE:  Sample temperature sensor and convert to temperature
//
//! \addtogroup driver_example_list
//! <h1>ADC Temperature Sensor Conversion</h1>
//!
//! This example sets up the ePWM to periodically trigger the ADC.  The
//! ADC converts the internal connection to the temperature sensor,
//! which is then interpreted as a temperature by calling the
//! ADC_getTemperatureC() function.
//!
//! \b External \b Connections \n
//!  - Connect VREFHI and VREFLO to desired reference voltage. If not 3.3V,
//!    make sure to adjust the argument to ADC_getTemperatureC() below.
//!
//! \b Watch \b Variables \n
//! - \b sensorSample - The raw reading from the temperature sensor
//! - \b sensorTemp   - The interpretation of the sensor sample as a temperature
//!                     in degrees Celsius.
//
//#############################################################################
// $TI Release: F28004x Support Library v1.06.00.00 $
// $Release Date: Mon May 27 06:42:25 CDT 2019 $
// $Copyright:
// Copyright (C) 2019 Texas Instruments Incorporated - http://www.ti.com/
//
// Redistribution and use in source and binary forms, with or without 
// modification, are permitted provided that the following conditions 
// are met:
// 
//   Redistributions of source code must retain the above copyright 
//   notice, this list of conditions and the following disclaimer.
// 
//   Redistributions in binary form must reproduce the above copyright
//   notice, this list of conditions and the following disclaimer in the 
//   documentation and/or other materials provided with the   
//   distribution.
// 
//   Neither the name of Texas Instruments Incorporated nor the names of
//   its contributors may be used to endorse or promote products derived
//   from this software without specific prior written permission.
// 
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
// $
//#############################################################################

//
// Included Files
//
#include "driverlib.h"
#include "device.h"

//
// Globals
//
uint16_t sensorSample;
int16_t sensorTemp;

//
// Function Prototypes
//
void initADC(void);
void initEPWM(void);
void initADCSOC(void);
__interrupt void adcB1ISR(void);

//
// Main
//
void main(void)
{
    //
    // Initialize device clock and peripherals
    //
    Device_init();

    //
    // Disable pin locks and enable internal pullups.
    //
    Device_initGPIO();

    //
    // Initialize PIE and clear PIE registers. Disables CPU interrupts.
    //
    Interrupt_initModule();

    //
    // Initialize the PIE vector table with pointers to the shell Interrupt
    // Service Routines (ISR).
    //
    Interrupt_initVectorTable();

    //
    // Interrupts that are used in this example are re-mapped to ISR functions
    // found within this file.
    //
    Interrupt_register(INT_ADCB1, &adcB1ISR);

    //
    // Set up the ADC and the ePWM and initialize the SOC
    //
    initADC();
    initEPWM();
    initADCSOC();

    //
    // Enable the temperature sensor and give it 500 us to power up
    //
    ASysCtl_enableTemperatureSensor();
    DEVICE_DELAY_US(500);

    //
    // Enable ADC interrupt
    //
    Interrupt_enable(INT_ADCB1);

    //
    // Enable Global Interrupt (INTM) and realtime interrupt (DBGM)
    //
    EINT;
    ERTM;

    //
    // Start ePWM1, enabling SOCA and putting the counter in up-count mode
    //
    EPWM_enableADCTrigger(EPWM1_BASE, EPWM_SOC_A);
    EPWM_setTimeBaseCounterMode(EPWM1_BASE, EPWM_COUNTER_MODE_UP);

    //
    // Loop indefinitely
    //
    while(1)
    {
        ;
    }
}

//
// initADC - Function to configure and power up ADCB.
//
void initADC(void)
{
    //
    // Setup VREF as external as required by the temperature sensor. Note that
    // the refVoltage parameter has no effect in this case.
    //
    ADC_setVREF(ADCB_BASE, ADC_REFERENCE_EXTERNAL, ADC_REFERENCE_3_3V);

    //
    // Set ADCCLK divider to /4
    //
    ADC_setPrescaler(ADCB_BASE, ADC_CLK_DIV_4_0);

    //
    // Set pulse positions to late
    //
    ADC_setInterruptPulseMode(ADCB_BASE, ADC_PULSE_END_OF_CONV);

    //
    // Power up the ADC and then delay for 1 ms
    //
    ADC_enableConverter(ADCB_BASE);
    DEVICE_DELAY_US(1000);
}

//
// initEPWM - Function to configure ePWM1 to generate the SOC.
//
void initEPWM(void)
{
    //
    // Disable SOCA
    //
    EPWM_disableADCTrigger(EPWM1_BASE, EPWM_SOC_A);

    //
    // Configure the SOC to occur on the first up-count event
    //
    EPWM_setADCTriggerSource(EPWM1_BASE, EPWM_SOC_A, EPWM_SOC_TBCTR_U_CMPA);
    EPWM_setADCTriggerEventPrescale(EPWM1_BASE, EPWM_SOC_A, 1);

    //
    // Set the compare A value to 2048 and the period to 4096
    //
    EPWM_setCounterCompareValue(EPWM1_BASE, EPWM_COUNTER_COMPARE_A, 0x0800);
    EPWM_setTimeBasePeriod(EPWM1_BASE, 0x1000);

    //
    // Freeze the counter
    //
    EPWM_setTimeBaseCounterMode(EPWM1_BASE, EPWM_COUNTER_MODE_STOP_FREEZE);
}

//
// initADCSOC - Function to configure ADCB's SOC0 to be triggered by ePWM1.
//
void initADCSOC(void)
{
    //
    // Configure SOC0. The temperature sensor is internally connected to B14
    // and requires an acquisition time of at least 450 ns.
    //
    ADC_setupSOC(ADCB_BASE, ADC_SOC_NUMBER0, ADC_TRIGGER_EPWM1_SOCA,
                 ADC_CH_ADCIN14, 45);

    //
    // Set SOC0 to set the interrupt 1 flag. Enable the interrupt and make
    // sure its flag is cleared.
    //
    ADC_setInterruptSource(ADCB_BASE, ADC_INT_NUMBER1, ADC_SOC_NUMBER0);
    ADC_enableInterrupt(ADCB_BASE, ADC_INT_NUMBER1);
    ADC_clearInterruptStatus(ADCB_BASE, ADC_INT_NUMBER1);
}

//
// adcB1ISR - ADC B Interrupt 1 ISR
//
__interrupt void adcB1ISR(void)
{
    //
    // Read the raw result
    //
    sensorSample = ADC_readResult(ADCBRESULT_BASE, ADC_SOC_NUMBER0);

    //
    // Convert the result to a temperature in degrees C
    //
    sensorTemp = ADC_getTemperatureC(sensorSample, 3.3f);

    //
    // Clear the interrupt flag
    //
    ADC_clearInterruptStatus(ADCB_BASE, ADC_INT_NUMBER1);

    //
    // Check if overflow has occurred
    //
    if(true == ADC_getInterruptOverflowStatus(ADCB_BASE, ADC_INT_NUMBER1))
    {
        ADC_clearInterruptOverflowStatus(ADCB_BASE, ADC_INT_NUMBER1);
        ADC_clearInterruptStatus(ADCB_BASE, ADC_INT_NUMBER1);
    }

    //
    // Acknowledge the interrupt
    //
    Interrupt_clearACKGroup(INTERRUPT_ACK_GROUP1);
}

//*****************************************************************************
//
//! Converts temperature from sensor reading to degrees C
//!
//! \param tempResult is the raw ADC A conversion result from the temp sensor.
//! \param vref is the reference voltage being used (for example 3.3 for 3.3V).
//!
//! This function converts temperature from temp sensor reading to degrees C.
//! Temp sensor values in production test are derived with 2.5V reference.
//! The \b vref argument in the function is used to scale the temp sensor
//! reading accordingly if temp sensor value is read at a different VREF
//! setting.
//!
//! \note Only external reference mode is supported for the temperature sensor.
//! This function does not set the reference mode. Reference mode can be set
//! using ADC_setVREF(). using ADC_setVREF().
//!
//! \return Returns the temperature sensor reading converted to degrees C.
//
//*****************************************************************************
static inline int16_t
ADC_getTemperatureC(uint16_t tempResult, float32_t vref)
{
float32_t temp;

//
// Read temp sensor slope and offset locations from OTP and convert
//
temp = (float32_t)tempResult * (vref / 2.5F);
return((int16_t)((((int32_t)temp - ADC_EXT_REF_TSOFFSET) * 4096) /
ADC_EXT_REF_TSSLOPE));
}
\note Only external reference mode is supported for the temperature sensor.
是否可以理解为必须外部给AD基准才可以使用这个温度采样？