hungdt-geeky/ktmt-luyentap

Các bài tập lập trình môn học kiến trúc máy tính (HUS)

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/*

• Bai_1.c
• Created: 24-Sep-20 8:56:40 AM
• Author: quockhanh
  */

// Viet chuong trinh dieu khien den LED
/*
Trong schematic, den LED duoc noi vao chan 7 <-> PE5(den LED duoc noi vao PORT E, bit so 5)
Muon duoc dieu khien duoc den LED thi bit ket noi den LED phai la OUTPUT.
/
/
Trong AVR co 3 thanh ghi tac dong vao bit
Thanh ghi DDR = Data DiRection: thanh ghi chi huong du lieu (INPUT/OUTPUT)

    DDR = 0: bit do nhan du lieu tu device (INPUT)    DDR = 1: bit do dua du lieu tu MCU ra ngoai device (OUTPUT)
Thanh ghi PORT: thanh ghi du lieu
    PORT = 1 + OUTPUT: ghi du lieu loi ra len CVV(5V hoac 3.3V)
    PORT = 1 + INPUT: treo bit do len VCC (PULL UP)
    PORT = 0: ghi du lieu OUTPUT ve GND (0V)
Thanh ghi PIN: thanh ghi doc du lieu (INPUT)
    Neu doc du lieu co logic la 5V (VCC) -> PIN = 1
    Neu doc du lieu co logic la 0V (GND) -> PIN = 0

*/

/*
De den lED co the dieu khien duoc, thanh ghi DDR tac dong vao PORT E, bit phai bang 1
DDRE.5 = 1; // Thanh ghi DDR tac dong PORT 5, bit 5 = 1
Muon den LED sang, tuy thuoc vao cach tac dong vao den LED
Neu noi theo kieu K, LED sang khi PORT = 1
Neu noi theo kieu A, LED sang khi PORT = 0
"Kieu noi trong mach dien thuc hanh la kieu noi A"
Vay de den LED sang, thanh ghi PORT tac dong vao PORT E, bit 5 = 0
PORTE.5 = 0
*/

#include <io.h>

void main(void) {
DDRE.5 = 1;
PORTE.5 = 0;

}

Note ADC

https://sangtaoclub.net/bai-viet/181-bai-5-lap-trinh-adc---do-nhiet-do-dung-lm35-hien-thi-lcd-voi-avr.html