TI中文支持网大家好：
我们购买了M430F5438A几套开发板，希望进行FFT的开发！
我们将正弦信号接入开发板的P6.7端口，幅值1.2V.
驱动程序主要的修改如下：
“ ADC12CTL0 |= ADC12ENC;
P6SEL |= 0x01; // P6.0 ADC option select
P1DIR |= BIT0; // P1.0 output ”
修改为：
“ ADC12CTL0 |= ADC12ENC;
P6SEL |= = BIT0 + BIT1 + BIT2; // P6.7 ADC option select
P1DIR |= BIT0; // P1.0 output ”
源程序地址如下：
dev.ti.com/…/node
Susan Yang：
我会在测试后给您回复
user5274273：
回复 Susan Yang:
谢谢！
更新一下，我们采用恒定的正弦信号（频率：1500HZ；幅值MAX=2.24V, 幅值MIN=190mV)
可以达到0x7ff以上(0.5AVcc)吧？
我们更关注的是输出数值，还是应当将幅值向上调一些？
user5274273：
回复 Susan Yang:
抱歉！
仍然没有结果！请参考截图
Susan Yang：
回复 user5274273:
我是使用CCS 10试的，0-2V的正弦波，代码如下
/* --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--*/ //****************************************************************************** //MSP430F543xA Demo - ADC12_A, Sample A0, Set P1.0 if A0 > 0.5*AVcc // //Description: A single sample is made on A0 with reference to AVcc. //Software sets ADC12SC to start sample and conversion - ADC12SC //automatically cleared at EOC. ADC12 internal oscillator times sample (16x) //and conversion. In mainloopwaits in LPM0 to save power until ADC12 //conversion complete, ADC12_ISR will force exit from LPM0 in Mainloop on //reti. If A0 > 0.5*AVcc, P1.0 set, else reset. // //MSP430F5438A //----------------- ///|\|| //| || //--|RST| //|| //Vin -->|P6.0/A0P1.0|--> LED // //M Morales //Texas Instruments Inc. //June 2009 //Built with CCE Version: 3.2.2 and IAR Embedded Workbench Version: 4.2 //******************************************************************************#include <msp430.h> int temp; int main(void) {WDTCTL = WDTPW + WDTHOLD;// Stop WDTADC12CTL0 = ADC12SHT02 + ADC12ON;// Sampling time, ADC12 onADC12CTL1 = ADC12SHP;// Use sampling timerADC12IE = 0x01;// Enable interruptADC12CTL0 |= ADC12ENC;P6SEL |= 0x80;// P6.0 ADC option select P6.7P1DIR |= BIT0;// P1.0 output__delay_cycles(10000);while (1){ADC12CTL0 |= ADC12SC;// Start sampling/conversion__bis_SR_register(LPM0_bits + GIE);// LPM0, ADC12_ISR will force exit__no_operation();// For debugger} }#if defined(__TI_COMPILER_VERSION__) || defined(__IAR_SYSTEMS_ICC__) #pragma vector = ADC12_VECTOR __interrupt void ADC12_ISR(void) #elif defined(__GNUC__) void __attribute__ ((interrupt(ADC12_VECTOR))) ADC12_ISR (void) #else #error Compiler not supported! #endif {switch(__even_in_range(ADC12IV,34)){case0: break;// Vector0:No interruptcase2: break;// Vector2:ADC overflowcase4: break;// Vector4:ADC timing overflowcase6:// Vector6:ADC12IFG0temp = ADC12MEM0;if (ADC12MEM0 >= 0x7ff)// ADC12MEM = A0 > 0.5AVcc?P1OUT |= BIT0;// P1.0 = 1elseP1OUT &= ~BIT0;// P1.0 = 0__bic_SR_register_on_exit(LPM0_bits);// Exit active CPUbreak;case8: break;// Vector8:ADC12IFG1case 10: break;// Vector 10:ADC12IFG2case 12: break;// Vector 12:ADC12IFG3case 14: break;// Vector 14:ADC12IFG4case 16: break;// Vector 16:ADC12IFG5case 18: break;// Vector 18:ADC12IFG6case 20: break;// Vector 20:ADC12IFG7case 22: break;// Vector 22:ADC12IFG8case 24: break;// Vector 24:ADC12IFG9case 26: break;// Vector 26:ADC12IFG10case 28: break;// Vector 28:ADC12IFG11case 30: break;// Vector 30:ADC12IFG12case 32: break;// Vector 32:ADC12IFG13case 34: break;// Vector 34:ADC12IFG14default: break;} }
user5274273：
回复 Susan Yang:
谢谢！
请参考我们的环境！
