TI中文支持网IO可以工作了，但是想问下为什么需要进行 PM5CTL0 &= ~LOCKLPM5; 设置。
还有，其他引脚在用IO功能时也需要做类似的操作吗 ？
我这样设置P4.6却得不到期望的输出，怎么解决
P1OUT &= ~0x01; // Clear P1.0 output latch for a defined power-on state
P1DIR |= 0x01; // Set P1.0 to output direction
P1REN |=0x01;
P1SEL1=0;
P1SEL0=0;
P4OUT &= ~0x06; // Clear P4.6 output latch for a defined power-on state
P4DIR |= 0x06; // Set P4.6 to output direction
P4REN |=0x06;
P4SEL1=0;
P4SEL0=0;
// to activate previously configured port settings
while(1)
{
P1OUT ^= BIT0; // Toggle LED
P4OUT ^= BIT6; // Toggle LED
__delay_cycles(1000000);
}
另外能不能再分别给个该单片机的SPI和Uart通信例程。
kqian0327：
你好，
一个一个解决你的问题：
1.PM5CTL0 &= ~LOCKLPM5
这个代码你可以去掉，因为这是用来解锁进入LPMx.5后GPIO状态的一句话，在超低功耗应用才用的到。这里加上这句话是怕你程序使能进入了LPMx.5模式。
2.去掉P4REN |= 0x06，这跳语句是使能上拉的意思。默认情况下PxSEL都是为0的，及都默认为GPIO模式。
P4OUT &= ~0x06; // Clear P4.6 output latch for a defined power-on state P4DIR |= 0x06; // Set P4.6 to output direction P4REN |=0x06; P4SEL1=0; P4SEL0=0; // to activate previously configured port settings
kqian0327：
UART 例程：
/* –COPYRIGHT–,BSD_EX * Copyright (c) 2012, Texas Instruments Incorporated * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * * Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * * Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * * Neither the name of Texas Instruments Incorporated nor the names of * its contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * ******************************************************************************* * * MSP430 CODE EXAMPLE DISCLAIMER * * MSP430 code examples are self-contained low-level programs that typically * demonstrate a single peripheral function or device feature in a highly * concise manner. For this the code may rely on the device's power-on default * register values and settings such as the clock configuration and care must * be taken when combining code from several examples to avoid potential side * effects. Also see www.ti.com/grace for a GUI- and www.ti.com/msp430ware * for an API functional library-approach to peripheral configuration. * * –/COPYRIGHT–*///******************************************************************************// MSP430FR59xx Demo – eUSCI_A0 UART echo at 9600 baud using BRCLK = 8MHz//// Description: This demo echoes back characters received via a PC serial port.// SMCLK/ DCO is used as a clock source and the device is put in LPM3// The auto-clock enable feature is used by the eUSCI and SMCLK is turned off// when the UART is idle and turned on when a receive edge is detected.// Note that level shifter hardware is needed to shift between RS232 and MSP// voltage levels.//// The example code shows proper initialization of registers// and interrupts to receive and transmit data.// To test code in LPM3, disconnect the debugger.//// ACLK = VLO, MCLK = DCO = SMCLK = 8MHz//// MSP430FR5969// —————–// RST -| P2.0/UCA0TXD|—-> PC (echo)// | |// | |// | P2.1/UCA0RXD|<—- PC// | |//// P. Thanigai// Texas Instruments Inc.// August 2012// Built with IAR Embedded Workbench V5.40 & Code Composer Studio V5.5//******************************************************************************#include "msp430.h"
int main(void){ WDTCTL = WDTPW | WDTHOLD; // Stop Watchdog
// Configure GPIO P2SEL1 |= BIT0 | BIT1; // USCI_A0 UART operation P2SEL0 &= ~(BIT0 | BIT1);
// Disable the GPIO power-on default high-impedance mode to activate // previously configured port settings PM5CTL0 &= ~LOCKLPM5;
// Startup clock system with max DCO setting ~8MHz CSCTL0_H = CSKEY >> 8; // Unlock clock registers CSCTL1 = DCOFSEL_3 | DCORSEL; // Set DCO to 8MHz CSCTL2 = SELA__VLOCLK | SELS__DCOCLK | SELM__DCOCLK; CSCTL3 = DIVA__1 | DIVS__1 | DIVM__1; // Set all dividers CSCTL0_H = 0; // Lock CS registers
// Configure USCI_A0 for UART mode UCA0CTLW0 = UCSWRST; // Put eUSCI in reset UCA0CTLW0 |= UCSSEL__SMCLK; // CLK = SMCLK // Baud Rate calculation // 8000000/(16*9600) = 52.083 // Fractional portion = 0.083 // User's Guide Table 21-4: UCBRSx = 0x04 // UCBRFx = int ( (52.083-52)*16) = 1 UCA0BR0 = 52; // 8000000/16/9600 UCA0BR1 = 0x00; UCA0MCTLW |= UCOS16 | UCBRF_1; UCA0CTLW0 &= ~UCSWRST; // Initialize eUSCI UCA0IE |= UCRXIE; // Enable USCI_A0 RX interrupt
__bis_SR_register(LPM3_bits | GIE); // Enter LPM3, interrupts enabled __no_operation(); // For debugger}
#if defined(__TI_COMPILER_VERSION__) || defined(__IAR_SYSTEMS_ICC__)#pragma vector=USCI_A0_VECTOR__interrupt void USCI_A0_ISR(void)#elif defined(__GNUC__)void __attribute__ ((interrupt(USCI_A0_VECTOR))) USCI_A0_ISR (void)#else#error Compiler not supported!#endif{ switch(__even_in_range(UCA0IV, USCI_UART_UCTXCPTIFG)) { case USCI_NONE: break; case USCI_UART_UCRXIFG: while(!(UCA0IFG&UCTXIFG)); UCA0TXBUF = UCA0RXBUF; __no_operation(); break; case USCI_UART_UCTXIFG: break; case USCI_UART_UCSTTIFG: break; case USCI_UART_UCTXCPTIFG: break; }}
