P1IE = 0x01
时间: 2023-08-23 17:16:45 浏览: 71
`P1IE = 0x01`是对P1IE寄存器进行赋值的操作。在MSP432F149微控制器中,P1IE寄存器用于配置P1端口的中断使能。每个位对应一个引脚的中断使能。
`P1IE = 0x01`将P1IE寄存器的最低位(第0位)设置为1,其他位保持不变。这意味着只有P1口第0引脚(P1.0)的中断使能被启用,其他引脚的中断使能被禁用。
通过将P1IE寄存器的特定位设置为1,可以启用相应引脚的中断。如果需要同时启用多个引脚的中断,可以将对应位置为1的位相加得到所需的值,并将其赋给P1IE寄存器。
需要注意的是,对P1IE寄存器的写入操作可能需要先禁用全局中断,以防止在写入期间发生中断。写入完成后,可以重新启用全局中断。
请注意,我是一个AI助手,无法直接执行代码。上述操作是为MSP432F149微控制器编写的示例代码。在实际使用时,请根据你的具体需求和硬件配置进行相应的设置。
相关问题
#include "reg51.h" #include "intrins.h" #define FOSC 11059200UL #define BRT (65536 - FOSC / 115200 / 4) sfr AUXR = 0x8e; sfr T2H = 0xd6; sfr T2L = 0xd7; sfr S2CON = 0x9a; sfr S2BUF = 0x9b; sfr IE2 = 0xaf; sfr P0M1 = 0x93; sfr P0M0 = 0x94; sfr P1M1 = 0x91; sfr P1M0 = 0x92; sfr P2M1 = 0x95; sfr P2M0 = 0x96; sfr P3M1 = 0xb1; sfr P3M0 = 0xb2; sfr P4M1 = 0xb3; sfr P4M0 = 0xb4; sfr P5M1 = 0xc9; sfr P5M0 = 0xca; bit busy; char wptr; char rptr; char buffer[16]; void Uart2Isr() interrupt 8 { if (S2CON & 0x02) { S2CON &= ~0x02; busy = 0; } if (S2CON & 0x01) { S2CON &= ~0x01; buffer[wptr++] = S2BUF; wptr &= 0x0f; } } void Uart2Init() { S2CON = 0x10; T2L = BRT; T2H = BRT >> 8; AUXR = 0x14; wptr = 0x00; rptr = 0x00; busy = 0; } void Uart2Send(char dat) { while (busy); busy = 1; S2BUF = dat; } void Uart2SendStr(char *p) { while (*p) { Uart2Send(*p++); } } void main() { P0M0 = 0x00; P0M1 = 0x00; P1M0 = 0x00; P1M1 = 0x00; P2M0 = 0x00; P2M1 = 0x00; P3M0 = 0x00; P3M1 = 0x00; P4M0 = 0x00; P4M1 = 0x00; P5M0 = 0x00; P5M1 = 0x00; Uart2Init(); IE2 = 0x01; EA = 1; Uart2SendStr("Uart Test !\r\n"); while (1) { if (rptr != wptr) { Uart2Send(buffer[rptr++]); rptr &= 0x0f; } } } 修改此程序使发送者发送字母o接收者连接的板子中端口P2.5灯开始亮其余灯灭
修改后的程序如下:
```c
#include "reg51.h"
#include "intrins.h"
#define FOSC 11059200UL
#define BRT (65536 - FOSC / 115200 / 4)
sfr AUXR = 0x8e;
sfr T2H = 0xd6;
sfr T2L = 0xd7;
sfr S2CON = 0x9a;
sfr S2BUF = 0x9b;
sfr IE2 = 0xaf;
sfr P0M1 = 0x93;
sfr P0M0 = 0x94;
sfr P1M1 = 0x91;
sfr P1M0 = 0x92;
sfr P2M1 = 0x95;
sfr P2M0 = 0x96;
sfr P3M1 = 0xb1;
sfr P3M0 = 0xb2;
sfr P4M1 = 0xb3;
sfr P4M0 = 0xb4;
sfr P5M1 = 0xc9;
sfr P5M0 = 0xca;
bit busy;
char wptr;
char rptr;
char buffer[16];
void Uart2Isr() interrupt 8 {
if (S2CON & 0x02) {
S2CON &= ~0x02;
busy = 0;
}
if (S2CON & 0x01) {
S2CON &= ~0x01;
buffer[wptr++] = S2BUF;
wptr &= 0x0f;
}
}
void Uart2Init() {
S2CON = 0x10;
T2L = BRT;
T2H = BRT >> 8;
AUXR = 0x14;
wptr = 0x00;
rptr = 0x00;
busy = 0;
}
void Uart2Send(char dat) {
while (busy);
busy = 1;
S2BUF = dat;
}
void Uart2SendStr(char *p) {
while (*p) {
Uart2Send(*p++);
}
}
void main() {
P0M0 = 0x00;
P0M1 = 0x00;
P1M0 = 0x00;
P1M1 = 0x00;
P2M0 = 0x00;
P2M1 = 0x00;
P3M0 = 0x00;
P3M1 = 0x00;
P4M0 = 0x00;
P4M1 = 0x00;
P5M0 = 0x00;
P5M1 = 0x00;
Uart2Init();
IE2 = 0x01;
EA = 1;
Uart2SendStr("Uart Test !\r\n");
while (1) {
if (rptr != wptr) {
char received = buffer[rptr++];
rptr &= 0x0f;
if (received == 'o') {
P2 = 0x20;
} else {
P2 = 0x00;
}
Uart2Send(received);
}
}
}
```
其中,修改的部分为:
```c
if (received == 'o') {
P2 = 0x20;
} else {
P2 = 0x00;
}
```
该部分代码会检测接收到的字符是否为字母'o',如果是,则点亮P2.5灯(二进制为0010 0000),否则将P2口置为0(灭灯)。
sfr P0 = 0x80;sfr P1 = 0x90;sfr P2 = 0xA0;sfr P3 = 0xB0;sfr PSW = 0xD0;sfr ACC = 0xE0;sfr B = 0xF0;sfr SP = 0x81;sfr DPL = 0x82;sfr DPH = 0x83;sfr PCON = 0x87;sfr TCON = 0x88;sfr TMOD = 0x89;sfr TL0 = 0x8A;sfr TL1 = 0x8B;sfr TH0 = 0x8C;sfr TH1 = 0x8D;sfr IE = 0xA8;sfr IP = 0xB8;sfr SCON = 0x98;sfr SBUF = 0x99; 英文缩写是什么
在这段代码中,各个缩写的英文全称如下:
- P0:Port 0
- P1:Port 1
- P2:Port 2
- P3:Port 3
- PSW:Program Status Word
- ACC:Accumulator
- B:B Register
- SP:Stack Pointer
- DPL:Data Pointer Low
- DPH:Data Pointer High
- PCON:Power Control
- TCON:Timer Control
- TMOD:Timer Mode
- TL0:Timer 0 Low
- TL1:Timer 1 Low
- TH0:Timer 0 High
- TH1:Timer 1 High
- IE:Interrupt Enable
- IP:Interrupt Priority
- SCON:Serial Control
- SBUF:Serial Buffer
这些缩写都是单片机中常见的寄存器或者外设,用于控制和处理各种输入输出以及状态信息。在进行单片机编程时,需要根据具体的应用场景和需求,选择合适的寄存器和外设,并对其进行相应的配置和控制。
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