msp430x24x_mpy_06.c

来自「这是关于430单片机的一些应用示例程序」· C语言 代码 · 共 36 行

//******************************************************************************
//   MSP430x24x Demo - 8x8 Unsigned Multiply Accumulate
//
//   Description: Hardware multiplier is used to multiply two numbers.
//   The calculation is automatically initiated after the second operand is
//   loaded. A second multiply accumulate operation is performed after that.
//   Results are stored in RESLO and RESHI. SUMEXT contains the carry of the
//   result.
//                 MSP430F249
//             -----------------
//         /|\|                 |
//          | |                 |
//          --|RST              |
//            |                 |
//            |                 |
//
//  B. Nisarga
//  Texas Instruments Inc.
//  September 2007
//  Built with CCE Version: 3.2.0 and IAR Embedded Workbench Version: 3.42A
//******************************************************************************
#include  <msp430x24x.h>

void main(void)
{
  WDTCTL = WDTPW+WDTHOLD;                   // Stop WDT

  MPY = 0x12;                               // Load first operand -unsigned mult
  OP2 = 0x56;                               // Load second operand

  MAC = 0x12;                               // Load first operand -unsigned MAC
  OP2 = 0x56;                               // Load second operand

  _BIS_SR(LPM4_bits);                       // LPM4
}