Question

nrf24l01硬件接口和msp430IO设置，的？430 IO口应该怎么设置，我下面配置的对不对？

//==================CE===========
#define RF24L01_CE_0 P2OUT &=~BIT1
#define RF24L01_CE_1 P2OUT |= BIT1
//===========RF24L01_CSN端口=====
#define RF24L01_CSN_0 P2OUT &=~BIT2
#define RF24L01_CSN_1 P2OUT |= BIT2
//==========RF24L01_SCK========
#define RF24L01_SCK_0 P3OUT &=~BIT0
#define RF24L01_SCK_1 P3OUT |= BIT0
//=============MISO端口=========
#define RF24L01_MISO_0 P3OUT &=~BIT2
#define RF24L01_MISO_1 P3OUT |= BIT2
//============MOSI端口==========
#define RF24L01_MOSI_0 P3OUT &=~BIT1
#define RF24L01_MOSI_1 P3OUT |= BIT1
//===========IRQ状态=========
#define RF24L01_IRQ_0 P3OUT &=~BIT3
#define RF24L01_IRQ_1 P3OUT |= BIT3
配置：：P2DIR |= BIT1; P2DIR |= BIT2; P3DIR |= BIT0;
P3DIR |= BIT1; P3DIR |= BIT2; P3DIR |= BIT3;P1IE&=~BIT1
顺便问下P1IE&=~BIT1什么意思

Answer 1

P1IE&=~BIT1 左边寄存器第1位取反，x&=~y 展开 x= x&(~y)
nrf24l01是spi接口，可以IO口软件模拟，也可以在硬件支持spi情况下用硬件spi获取更高效率，具体配置要参考具体单片机的型号手册