2016金属物体探测定位器（B题含代码）报告(6)

P4OUT &= ~BIT0;

while (!(UCB1IFG&UCTXIFG)); UCB1TXBUF = txaddr;

while (!(UCB1IFG&UCTXIFG)); UCB1TXBUF = 0;

while (UCB1STAT & UCBUSY); * rxbuf = UCB1RXBUF; rxbuf++;

while (!(UCB1IFG&UCTXIFG)); UCB1TXBUF = 0;

while (UCB1STAT & UCBUSY); * rxbuf = UCB1RXBUF;

while (UCB1STAT & UCBUSY); P4OUT |= BIT0;

return 0; }

char spi_readBytes( char addr, char * buffer, unsigned char len) {

rxlen = len;

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rxbuf = buffer; txaddr = addr | 0x80; P4OUT &= ~BIT0;

while (!(UCB1IFG&UCTXIFG)); UCB1TXBUF = txaddr; while (rxlen > 0) {

while (!(UCB1IFG&UCTXIFG)); UCB1TXBUF = 0;

while (UCB1STAT & UCBUSY); * rxbuf = UCB1RXBUF; rxbuf++; rxlen--; }

while (UCB1STAT & UCBUSY); P4OUT |= BIT0; return 0; }

char spi_writeByte(char addr, char data) {

wordbuf[0] = data; // copy from stack to memory

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txlen = 1;

txbuf = &wordbuf[0]; txaddr = addr & ~0x80;

P4OUT &= ~BIT0;

while (!(UCB1IFG&UCTXIFG)); UCB1TXBUF = txaddr;

while (!(UCB1IFG&UCTXIFG)); UCB1TXBUF = *txbuf;

while (UCB1STAT & UCBUSY); P4OUT |= BIT0;

return 0; }

char spi_writeWord(char addr, unsigned int data) {

wordbuf[0] = data >> 8; // Big Endian wordbuf[1] = data & 0xFF; txlen = 2;

txbuf = &wordbuf[0];

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txaddr = addr & ~0x80; P4OUT &= ~BIT0;

while (!(UCB1IFG&UCTXIFG)); UCB1TXBUF = txaddr;

while (!(UCB1IFG&UCTXIFG)); UCB1TXBUF = *txbuf; txbuf++;

while (!(UCB1IFG&UCTXIFG)); UCB1TXBUF = *txbuf;

while (UCB1STAT & UCBUSY); P4OUT |= BIT0; return 0; }

char spi_writeBytes( char addr, char * buffer, unsigned char len) {

txlen = len; txbuf = buffer; txaddr = addr & ~0x80;

P4OUT &= ~BIT0;

while (!(UCB1IFG&UCTXIFG));

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UCB1TXBUF = txaddr;

while (txlen > 0) {

while (!(UCB1IFG&UCTXIFG)); UCB1TXBUF = *txbuf; txbuf++; txlen--; }

while (UCB1STAT & UCBUSY); P4OUT |= BIT0;

return 0; }

timer.h文件：

#include \

#ifndef TIMER_H #define TIMER_H

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