msp430f149控制ADXL345的程序
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发布时间：2022-04-22 09:54
共1个回答
热心网友
时间：2023-06-30 21:59
ADXL345使用5v电源 SPI方式可以参考ti例子因为初始化是固定的呀
比如
//******************************************************************************
// MSP-FET430P140 Demo - USART0, SPI Full-Duplex 3-Wire Slave P1.x Exchange
//
// Description: SPI Master communicates at fast as possible, full-plex with
// SPI Slave using 3-wire mode. The level on P1.4/5 is TX'ed and RX'ed to P1.0
// and P1.1. Master will pulse slave Reset on init to insure synch start.
// Slave normal mode is LPM4.
// ACLK = n/a, MCLK = SMCLK = DCO ~ 800kHz, ULCK = external
//
// fet140_slav0 fet140_mstr0
// MSP430F169 Slave MSP430F169 Master
// ----------------- -----------------
// | XIN|- /|\| XIN|-
// | | | | |
// | XOUT|- --|RST XOUT|-
// | | /|\ | |
// | RST|--+<----|P3.0 |
// LED <-|P1.0 | | P1.4|<-
// LED <-|P1.1 | | P1.5|<-
// ->|P1.4 | | P1.0|-> LED
// ->|P1.5 | | P1.1|-> LED
// | SIMO0/P3.1|<-------|P3.1 |
// | SOMI0/P3.2|------->|P3.2 |
// | UCLK/P3.3|<-------|P3.3 |
//
// M. Buccini
// Texas Instruments Inc.
// Feb 2005
// Built with IAR Embedded Workbench Version: 3.21A
//******************************************************************************
#include <msp430x14x.h>
void main(void)
{
WDTCTL = WDTPW + WDTHOLD; // Stop watchdog
P1OUT = 0x00; // P1.0 setup for LED output
P1DIR |= 0x03;
P3SEL |= 0x0E; // P3.1,2,3 SPI option select
U0CTL = CHAR + SYNC + SWRST; // 8-bit, SPI
U0TCTL = CKPL + STC; // Polarity, 3-wire
U0BR0 = 0x02; // SPICLK = SMCLK/2
U0BR1 = 0x00;
U0MCTL = 0x00;
ME1 |= USPIE0; // Mole enable
U0CTL &= ~SWRST; // SPI enable
IE1 |= URXIE0 + UTXIE0; // RX and TX interrupt enable
_BIS_SR(LPM4_bits + GIE); // Enter LPM4 w/ interrupt
}
#pragma vector=USART0RX_VECTOR
__interrupt void SPI0_rx (void)
{
P1OUT = RXBUF0; // RXBUF0 to TXBUF0
}
#pragma vector=USART0TX_VECTOR
__interrupt void SPI0_tx (void)
{
unsigned int i;
i = P1IN;
i = i >> 4;
TXBUF0 = i; // Transmit character
}
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