fet430_oa_05.c

来自「MSP430FG437各模块实现的典型程序」· C语言 代码 · 共 36 行

//*****************************************************************************
//  MSP-FET430P430 Demo - OA0, Non-Inverting PGA Mode
//
//  Description: Configure OA0 for Non-Inverting PGA mode. In this mode,
//  the "-" terminal is connected to the R ladder tap and the OAFBRx bits
//  select the gain.
//  ACLK = n/a, MCLK = SMCLK = default DCO
//
//                 MSP430FG439
//              -------------------
//          /|\|                XIN|-
//           | |                   |
//           --|RST            XOUT|-
//             |                   |
//      "+" -->|P6.0/OA0I0         |
//             |                   |
//             |          P6.1/OA0O|--> OA0 Output
//             |                   |    Gain is 8
//
//  M. Mitchell
//  Texas Instruments Inc.
//  Feb 2005
//  Built with IAR Embedded Workbench Version: 3.21A
//*****************************************************************************
#include  <msp430xG43x.h>

void main(void)
{
  WDTCTL = WDTPW + WDTHOLD;                 // Stop watchdog timer
  OA0CTL0 = OAPM_1 + OAADC1;                // Select inputs, power mode
  OA0CTL1 = OAFC_4 + OAFBR_6 + OARRIP;      // Mode, OAFBRx sets gain

  LPM3;                                     // LPM3
}