msp430g2553控制1602
时间: 2023-09-20 21:03:33 浏览: 38
要使用MSP430G2553控制1602液晶显示屏,您需要连接MSP430G2553和1602液晶,并编写代码来控制它。
以下是一些步骤:
1.连接液晶显示屏:将MSP430G2553的VSS引脚连接到1602的VSS引脚,将MSP430G2553的VDD引脚连接到1602的VDD引脚,将MSP430G2553的P1.0引脚连接到1602的RS引脚,将MSP430G2553的P1.1引脚连接到1602的EN引脚,将MSP430G2553的P1.4-P1.7引脚连接到1602的D4-D7引脚。
2.编写代码:使用MSP430G2553的GPIO库和延时函数来编写代码。您需要初始化GPIO引脚并将它们设置为输出模式,然后使用延时函数来等待液晶显示屏完成操作。
以下是一个示例代码:
```
#include <msp430g2553.h>
#define LCD_RS BIT0
#define LCD_EN BIT1
#define LCD_D4 BIT4
#define LCD_D5 BIT5
#define LCD_D6 BIT6
#define LCD_D7 BIT7
void LCD_init(void);
void LCD_sendCommand(unsigned char command);
void LCD_sendData(unsigned char data);
void LCD_sendString(char *string);
void LCD_gotoXY(unsigned char row, unsigned char col);
void main(void) {
WDTCTL = WDTPW + WDTHOLD; // stop watchdog timer
BCSCTL1 = CALBC1_1MHZ; // set DCO to 1MHz
DCOCTL = CALDCO_1MHZ;
P1DIR |= LCD_RS + LCD_EN + LCD_D4 + LCD_D5 + LCD_D6 + LCD_D7; // set pins as outputs
LCD_init();
LCD_sendString("Hello, world!");
LCD_gotoXY(2, 1);
LCD_sendString("MSP430G2553");
while(1);
}
void LCD_init(void) {
__delay_cycles(50000);
LCD_sendCommand(0x02);
LCD_sendCommand(0x28);
LCD_sendCommand(0x0C);
LCD_sendCommand(0x06);
LCD_sendCommand(0x01);
__delay_cycles(50000);
}
void LCD_sendCommand(unsigned char command) {
P1OUT &= ~LCD_RS; // set RS to 0 for command mode
P1OUT &= ~LCD_EN; // set EN to 0
P1OUT = (P1OUT & 0x0F) | (command & 0xF0); // send high nibble
P1OUT |= LCD_EN; // set EN to 1
__delay_cycles(2000); // wait
P1OUT &= ~LCD_EN; // set EN to 0
P1OUT = (P1OUT & 0x0F) | ((command << 4) & 0xF0); // send low nibble
P1OUT |= LCD_EN; // set EN to 1
__delay_cycles(2000); // wait
P1OUT &= ~LCD_EN; // set EN to 0
}
void LCD_sendData(unsigned char data) {
P1OUT |= LCD_RS; // set RS to 1 for data mode
P1OUT &= ~LCD_EN; // set EN to 0
P1OUT = (P1OUT & 0x0F) | (data & 0xF0); // send high nibble
P1OUT |= LCD_EN; // set EN to 1
__delay_cycles(2000); // wait
P1OUT &= ~LCD_EN; // set EN to 0
P1OUT = (P1OUT & 0x0F) | ((data << 4) & 0xF0); // send low nibble
P1OUT |= LCD_EN; // set EN to 1
__delay_cycles(2000); // wait
P1OUT &= ~LCD_EN; // set EN to 0
}
void LCD_sendString(char *string) {
while(*string) {
LCD_sendData(*string++);
}
}
void LCD_gotoXY(unsigned char row, unsigned char col) {
unsigned char address;
if(row == 1) {
address = 0x80 + col - 1;
} else {
address = 0xC0 + col - 1;
}
LCD_sendCommand(address);
}
```
此代码将在1602液晶显示屏上显示“Hello, world!”和“MSP430G2553”。您可以在此基础上进行修改和扩展,以满足您的需求。