?? msp430x22x4_clks_modified.c
字號:
//******************************************************************************
// MSP430F22xx Demo - Basic Clock, Output Buffered SMCLK, ACLK and MCLK/10
//
// Description: Buffer ACLK on P2.0, default SMCLK(DCO) on P2.1 and MCLK/10 on
// P1.0.
// ACLK = LFXT1 = VLO, MCLK = SMCLK = default DCO
// //* External watch crystal installed on XIN XOUT is required for ACLK *//
//
// MSP430F22x4
// -----------------
// /|\| XIN|-
// | | |
// --|RST XOUT|-
// | |
// | P2.0/ACLK|-->ACLK = VLO
// | P2.1/SMCLK|-->SMCLK = Default DCO
// | P1.0|-->MCLK/10 = DCO/10
// | |
//
// M. Buccini / L. Westlund
// Texas Instruments Inc.
// October 2005
// Built with IAR Embedded Workbench Version: 3.42F
//******************************************************************************
#include <msp430x22x4.h>
void main(void)
{
volatile unsigned int i;
WDTCTL = WDTPW +WDTHOLD; // Stop Watchdog Timer
BCSCTL3 |= LFXT1S_2; // LFXT1 = VLO
// DCOCTL = CALDCO_16MHZ;
// BCSCTL1 = CALBC1_16MHZ;
P1DIR |= BIT0; // P1.0 outputs
P2DIR |= 0x03;
P2SEL |= 0x03; // P2.0,1 ACLK, SMCLK output
while(1)
{
P1OUT |= BIT0; // P1.0 = 1
for(i=50000;i>0;i--); // Delay
P1OUT &= ~BIT0; // P1.0 = 0
for(i=50000;i>0;i--); // Delay
}
}
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