msp430g2231用内部晶振 io ad 求程序！IAR

建议先参考mspware里的例程。

你好，

我看了一下你的代码，如果只是单纯的点一个led灯，我建议你这样来处理：

#include "msp430g2231.h"

int main( void )
{

WDTCTL = WDTPW + WDTHOLD;


P1DIR |= 0xff; 
while(1)
{
volatile unsigned int i;
P1OUT ^= 0xff; 
i = 5000; 
while (i--);
} 
}

第一加载正确的头文件msp430g2311，while循环的时间加大，你设置的时间太小了，小到无法分辨led是亮还是暗。

第二，我贴出来一个adc相关的例子，希望对你有帮助：

/* --COPYRIGHT--,BSD_EX
* Copyright (c) 2012, Texas Instruments Incorporated
* All rights reserved.
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* modification, are permitted provided that the following conditions
* are met:
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* its contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
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* 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,
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* 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--*/
//******************************************************************************
// MSP430G2x31 Demo - ADC10, Sample A11, Lo_Batt, Set P1.0 if < 2.3V
//
// Description: A single sample is made on A11 (AVcc/2) with reference to
// internal 1.5V Vref. Software sets ADC10SC to start sample and conversion
// - ADC10SC automatically cleared at EOC. ADC10 internal oscillator times
// sample (16x) and conversion. ADC10BUSY flag is polled for EOC. If A11
// (AVcc/2) < 0311h (0.65V) indicating AVcc is less 2.3V, P1.0 set indicating
// a lo_Batt condition, else reset.
//
// MSP430G2x31
// -----------------
// /|\| XIN|-
// | | |
// --|RST XOUT|-
// | |
// |A11 P1.0|-->LED
//
// D. Dang
// Texas Instruments Inc.
// October 2010
// Built with CCS Version 4.2.0 and IAR Embedded Workbench Version: 5.10
//******************************************************************************
#include <msp430.h>

int main(void)
{
WDTCTL = WDTPW + WDTHOLD; // Stop WDT
ADC10CTL1 = INCH_11; // AVcc/2
ADC10CTL0 = SREF_1 + ADC10SHT_2 + REFON + ADC10ON;
P1DIR |= 0x01; // Set P1.0 to output direction

for (;;)
{
ADC10CTL0 |= ENC + ADC10SC; // Sampling and conversion start
while (ADC10CTL1 & ADC10BUSY); // ADC10BUSY?
if (ADC10MEM < 0x311) // ADC10MEM = A11 > 0.65?
P1OUT |= 0x01; // Set P1.0 LED on
else
P1OUT &= ~0x01; // Clear P1.0 LED off
}
}

你把这两个工程嵌入到一个工程里面，就可以得到你想要的功能啦。

看看后续有什么问题，我们再来帮你解决。

建议参考 code examples， 官网下载MSPWARE