[求助] MSP430F5529 ADC12代码疑问

haiqibian 2013-11-4 19:58 楼主

参照各种官方示例程序之后编写了一段ADC12的转换程序。程序实现的功能是：通过I/O端口P6.6获取输入模拟信号，通过TA0获取取样频率10μs/sample，并触发ADC转换。时钟源取SMCLK，用DCO配置0.7MHz，采用Up-Mode和Repeat single-channel conversion，中断时将ADC12MEM0的值存入ADC_Results[index]。

为了验证程序是否正确运行，用了示例程序里的HAL_Dogs102x6.h（为了显示在LCD屏上）和HAL_Board.h（为了点亮或熄灭LED灯），但没法运行。所以问题就是：

1. ADC12这部分是不是能实现10μs/sample的功能

2.如何验证此程序按预期正确运行了

主程序附件添加了

麻烦各位了，我找不出程序的错又没有办法验证它是否正确运行

[ 本帖最后由 haiqibian 于 2013-11-4 20:02 编辑 ]

main.c (2013-11-4 20:01 上传)

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回复评论（4）

沙发 wstt

这段代码结构上既然使能了定时器中断就应该有中断服务函数

《MCU工程师炼成记》作者之一

点赞 2013-11-4 21:15

板凳 wstt

//******************************************************************************
// MSP430G2x33/G2x53 Demo - ADC10, Sample A1, 1.5V, TA1 Trig, Set P1.0 if > 0.5V
//
// Description: A1 is sampled 16/second (ACLK/2048) with reference to 1.5V.
// Timer_A is run in upmode and TA1 is used to automatically trigger
// ADC10 conversion, TA0 defines the period. Internal oscillator times sample
// (16x) and conversion (13x). Inside ADC10_ISR if A1 > 0.5Vcc, P1.0 is set,
// else reset. Normal mode is LPM3.
// //* An external watch crystal on XIN XOUT is required for ACLK *//
//
// MSP430G2x33/G2x53
// -----------------
// /|\| XIN|-
// | | | 32kHz
// --|RST XOUT|-
// | |
// >---|P1.1/A1 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 "msp430g2553.h"
void main(void)
{
WDTCTL = WDTPW + WDTHOLD; // Stop WDT
ADC10CTL1 = SHS_1 + CONSEQ_2 + INCH_1; // TA1 trigger sample start
ADC10CTL0 = SREF_1 + ADC10SHT_2 + REFON + ADC10ON + ADC10IE;
__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; // ADC10 Enable
ADC10AE0 |= 0x02; // P1.1 ADC10 option select
P1DIR |= 0x01; // Set P1.0 output
TACCR0 = 2048-1; // PWM Period
TACCTL1 = OUTMOD_3; // TACCR1 set/reset
TACCR1 = 2047; // TACCR1 PWM Duty Cycle
TACTL = TASSEL_1 + MC_1; // ACLK, up mode
__bis_SR_register(LPM3_bits + GIE); // Enter LPM3 w/ interrupts
}
// ADC10 interrupt service routine
#pragma vector=ADC10_VECTOR
__interrupt void ADC10_ISR(void)
{
if (ADC10MEM < 0x155) // ADC10MEM = A1 > 0.5V?
P1OUT &= ~0x01; // Clear P1.0 LED off
else
P1OUT |= 0x01; // Set P1.0 LED on
}
#pragma vector=TIMER0_A0_VECTOR
__interrupt void ta0_isr(void)
{
TACTL = 0;
LPM0_EXIT; // Exit LPM0 on return
}