Добавил:
Upload
Опубликованный материал нарушает ваши авторские права? Сообщите нам.
Вуз:
Предмет:
Файл:Микропроцессорная техника / MSP430G2xx2_Code_Examples / msp430g2x32_adc10_03
.c/* --COPYRIGHT--,BSD_EX
* Copyright (c) 2012, Texas Instruments Incorporated
* All rights reserved.
*
* 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.
*
*******************************************************************************
*
* MSP430 CODE EXAMPLE DISCLAIMER
*
* MSP430 code examples are self-contained low-level programs that typically
* demonstrate a single peripheral function or device feature in a highly
* concise manner. For this the code may rely on the device's power-on default
* register values and settings such as the clock configuration and care must
* be taken when combining code from several examples to avoid potential side
* effects. Also see www.ti.com/grace for a GUI- and www.ti.com/msp430ware
* for an API functional library-approach to peripheral configuration.
*
* --/COPYRIGHT--*/
//******************************************************************************
// MSP430G2x32/G2x52 Demo - ADC10, Sample A10 Temp, Set P1.0 if Temp ++ ~2C
//
// Description: se ADC10 and the integrated temperature sensor to detect
// temperature gradients. The temperature sensor output voltage is sampled
// ~ every 120ms and compared with the defined delta values using an ISR.
// (ADC10OSC/4)/64 determines sample time which needs to be greater than
// 30us for temperature sensor.
// ADC10 is operated in repeat-single channel mode with the sample and
// convert trigger sourced from Timer_A CCR1. The ADC10IFG at the end
// of each converstion will trigger an ISR.
// ACLK = n/a, MCLK = SMCLK = default DCO ~ 1.2MHz, ADC10CLK = ADC10OSC
//
// MSP430G2x32/G2x52
// -----------------
// /|\| XIN|-
// | | |
// --|RST XOUT|-
// | |
// |A10 P1.0|-->LED
//
// D. Dang
// Texas Instruments Inc.
// December 2010
// Built with CCS Version 4.2.0 and IAR Embedded Workbench Version: 5.10
//******************************************************************************
#include <msp430.h>
static unsigned int FirstADCVal; // holds 1st ADC result
#define ADCDeltaOn 3 // ~ 2 Deg C delta for LED on
int main(void)
{
WDTCTL = WDTPW + WDTHOLD; // Stop watchdog
ADC10CTL1 = ADC10DIV_3 + INCH_10 + SHS_1 + CONSEQ_2; // TA trig., rpt, A10
ADC10CTL0 = SREF_1 + ADC10SHT_3 + REF2_5V + ADC10IE + REFON + ADC10ON;
__enable_interrupt(); // Enable interrupts.
TACCR0 = 30; // Delay to allow Ref to settle
TACCTL0 |= CCIE; // Compare-mode interrupt.
TACTL = TASSEL_2 | MC_1; // TACLK = SMCLK, Up mode.
LPM0; // Wait for delay.
TACCTL0 &= ~CCIE; // Disable timer Interrupt
__disable_interrupt();
ADC10CTL0 |= ENC;
TACCTL1 = OUTMOD_4; // Toggle on EQU1 (TAR = 0)
TACTL = TASSEL_2 + MC_2; // SMCLK, cont-mode
while (!(ADC10IFG & ADC10CTL0)); // First conversion?
FirstADCVal = ADC10MEM; // Read out 1st ADC value
P1OUT = 0x00; // Clear P1
P1DIR = 0x01; // P1.0 as output
__bis_SR_register(LPM0_bits + GIE); // Enter LPM0 w/ interrupt
}
#pragma vector=ADC10_VECTOR
__interrupt void ADC10_ISR (void)
{
if (ADC10MEM >= FirstADCVal + ADCDeltaOn)
P1OUT |= 0x01; // LED on
else
P1OUT &= ~0x01; // LED off
}
#pragma vector=TIMER0_A0_VECTOR
__interrupt void ta0_isr(void)
{
TACTL = 0;
LPM0_EXIT; // Exit LPM0 on return
}
Соседние файлы в папке MSP430G2xx2_Code_Examples