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Файл:Микропроцессорная техника / MSP430G2xx2_Code_Examples / msp430g2x12_ca_01
.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;
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*
*******************************************************************************
*
* 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--*/
//******************************************************************************
// MSP430G2x12/G2x52 Demo - Comp_A, Output Reference Voltages on P1.1
//
// Description: Output Comparator_A reference levels on P1.1. Program will
// cycle through the on-chip comparator_A reference voltages with output on
// P1.1. Normal mode is LPM0, TA0_ISR will interrupt LPM0.
// ACLK = n/a, MCLK = SMCLK = default DCO
//
// MSP430G2x12/G2x52
// -----------------
// /|\| XIN|-
// | | |
// --|RST XOUT|-
// | |
// | P1.1/CA1|--> Vref
// | |
//
// D. Dang
// Texas Instruments Inc.
// December 2010
// Built with CCS Version 4.2.0 and IAR Embedded Workbench Version: 5.10
//******************************************************************************
#include <msp430.h>
void delay(void); // Software delay
int main (void)
{
WDTCTL = WDTPW + WDTHOLD; // Stop WDT
CACTL2 = P2CA4; // CA1/P1.1 = +comp
CCTL0 = CCIE; // CCR0 interrupt enabled
TACTL = TASSEL_2 + ID_3 + MC_2; // SMCLK/8, cont-mode
_EINT(); // enable interrupts
while (1) // Loop
{
CACTL1 = 0x00; // No reference voltage
_BIS_SR(LPM0_bits); // Enter LPM0
CACTL1 = CAREF0 + CAON; // 0.25*Vcc, Comp. on
_BIS_SR(LPM0_bits); // Enter LPM0
CACTL1 = CAREF1 + CAON; // 0.5*Vcc, Comp. on
_BIS_SR(LPM0_bits); // Enter LPM0
CACTL1 = CAREF1 + CAREF0 + CAON; // 0.55V, Comp. on
_BIS_SR(LPM0_bits); // Enter LPM0
}
}
// Timer A0 interrupt service routine
#pragma vector=TIMER0_A0_VECTOR
__interrupt void Timer_A (void)
{
_BIC_SR_IRQ(LPM0_bits); // Clear LPM0 bits from 0(SR)
}
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