msp430xg46x_mpy_07.c

来自「TI提供的MSP430开发例程,适合初学者练习各个功能模块的使用」· C语言 代码 · 共 39 行

//******************************************************************************
//   MSP430xG46x Demo - 16x16 Signed 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 extended sign of
//   the result.
//
//   ACLK = 32.768kHz, MCLK = SMCLK = default DCO
//
//                 MSP430xG461x
//             -----------------
//         /|\|                 |
//          | |                 |
//          --|RST              |
//            |                 |
//            |                 |
//
//   K. Quiring/ M. Mitchell
//   Texas Instruments Inc.
//   October 2006
//   Built with IAR Embedded Workbench Version: 3.41A
//******************************************************************************
#include  <msp430xG46x.h>

void main(void)
{
  WDTCTL = WDTPW+WDTHOLD;                   // Stop WDT
  FLL_CTL0 |= XCAP14PF;                     // Configure load caps
  MPY = 0x1234;                             // Load first operand -unsigned mult
  OP2 = 0x5678;                             // Load second operand

  MACS = 0x1234;                            // Load first operand -signed MAC
  OP2 = 0x5678;                             // Load second operand

  _BIS_SR(LPM4_bits);                       // LPM4
}