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--- archive:nmk322 [2024/12/19 11:54] – [Lecture Slides] azman
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-====== NMK32203 - Microcontroller ======
-//**Note20241017** This page is being updated - work in progress...//
-This course is //Microcontroller//, offered by the Faculty of Electronics Engineering & Technology.
-===== Announcements =====
-[20241017] Updating this for 202425s1 Academic Session.
-===== Lecture Slides =====
-  * Lecture 1 - {{:archive:nmk322:lecture01_overview.pdf|Overview}}
-  * Lecture 2 - {{:archive:nmk322:lecture02_arch8051.pdf|Architecture}}
-  * Lecture 3 - {{:archive:nmk322:lecture03_c8051.pdf|C for 8051}}
-  * Lecture 4 - {{:archive:nmk322:lecture04_gpio.pdf|8051 I/O}}
-  * Lecture 5 - {{:archive:nmk322:lecture05_timer.pdf|8051 Timer}}
-  * Lecture 6 - {{:archive:nmk322:lecture06_serial.pdf|8051 Serial Interface}}
-===== Library Codes =====
-Introduction to using 'library' code. Single header include file(s) meant for single source compilation. These are meant to be compiled using Keil 8051 compiler.
-I recommend to use my include file (mcu51.h) rather than the regular (reg51.h) because it would be easier for you to use my example codes and library. I wrote and tested them using my own syntax that can be used on both Keil and SDCC compilers. Simply extract this {{:archive:nmk322:my1code51inc-20241210.zip|zip file}} and setup the include path. Ask me during lab session if you do not know how to do that.
-==== Library: Serial (UART) ====
-<file c uart.h>
-#ifndef __MY1UART_H__
-#define __MY1UART_H__
-/* note: this is NOT compatible with keil's printf */
-void uart_init(void) {
-	SCON = 0x50;
-	TMOD &= 0x0F;
-	TMOD |= 0x20;
-	TH1 = 253;
-	TR1 = 1;
-}
-void uart_send(unsigned char sdat) {
-	SBUF = sdat;
-	while (TI==0);
-	TI = 0;
-}
-unsigned char uart_read(void) {
-	unsigned char rdat;
-	while (RI==0);
-	rdat = SBUF;
-	RI = 0;
-	return rdat;
-}
-void uart_puts(char* text) {
-	while (*text) {
-		uart_send(*text);
-		text++;
-	}
-}
-#endif /* __MY1UART_H__ */
-</file>
-==== Library: Text LCD ====
-<file c tlcd.h>
-#ifndef __MY1TLCD_H__
-#define __MY1TLCD_H__
-#define LCD_DATA P2
-sbit LCD_RS = P0^7;
-sbit LCD_RW = P0^6;
-sbit LCD_EN = P0^5;
-void tlcd_delay(unsigned char step) {
-	unsigned int loop;
-	do {
-		loop = 1000; while (--loop);
-	} while (--step);
-}
-void tlcd_write(unsigned char cdat) {
-	LCD_RS = 1;
-	LCD_RW = 0;
-	LCD_DATA = cdat;
-	LCD_EN = 1;
-	LCD_EN = 0;
-	tlcd_delay(1);
-}
-void tlcd_cmd(unsigned char ccmd) {
-	LCD_RS = 0;
-	LCD_RW = 0;
-	LCD_DATA = ccmd;
-	LCD_EN = 1;
-	LCD_EN = 0;
-	tlcd_delay(2);
-}
-void tlcd_init(void) {
-	tlcd_cmd(0x38); /* 8 bit mode, 1/16 duty, 5x8 font */
-	tlcd_cmd(0x38);
-	tlcd_cmd(0x38);
-	tlcd_cmd(0x06); /* display off */
-	tlcd_cmd(0x0c); /* display on, blink cursor on */
-	tlcd_cmd(0x01); /* clear display */
-}
-void tlcd_puts(char* text) {
-	while (*text) {
-		tlcd_write(*text);
-		text++;
-	}
-}
-#endif /* __MY1TLCD_H__ */
-</file>
-==== Library: Timer ====
-<file c timer.h>
-#ifndef __MY1TIMER_H__
-#define __MY1TIMER_H__
-// useful macro!
-#define timer0_init() { TMOD &= 0xF0; TMOD |= 0x01; }
-#define timer0_prep(hi,lo) { TH0 = hi; TL0 = lo; }
-#define timer0_stop() { TR0 = 0; TF0 = 0; }
-#define timer0_exec() { TR0 = 1; }
-#define timer0_flag() { timer0_exec(); while (!TF0); }
-#define timer0_wait(hi,lo) { timer0_prep(hi,lo); timer0_flag(); timer0_stop(); }
-#define timer0_null() { TH0 = 0; TL0 = 0; }
-#define timer0_read() ((unsigned int)TH0<<8)|TL0
-void timer0_delayms(unsigned int step) {
-	do {
-		timer0_wait(0xfc,0x66); // 1 ms delay
-	} while (--step);
-}
-#endif /* __MY1TIMER_H__ */
-</file>
-==== Library: Utilities (str-int conversions) ====
-<file c utils.h>
-#ifndef __MY1UTILS_H__
-#define __MY1UTILS_H__
-unsigned char uint8_2cstr(char* cstr, unsigned char that) {
-	unsigned char size, temp;
-	size = 0;
-	temp = that/100;
-	if (temp) {
-		that %= 100;
-		cstr[size++] = temp + 0x30;
-	}
-	temp = that/10;
-	if (temp) {
-		that %= 10;
-		cstr[size++] = temp + 0x30;
-	} else if (size)
-		cstr[size++] = 0x30;
-	cstr[size++] = that + 0x30;
-	cstr[size] = 0x0;
-	return size;
-}
-unsigned char int8_2cstr(char* cstr, signed char that) {
-	if (that<0) {
-		that = -that;
-		*cstr = '-';
-		cstr++;
-	}
-	return uint8_2cstr(cstr,(unsigned char)that);
-}
-unsigned char uint16_2cstr(char* cstr, unsigned int that) {
-	unsigned char size, temp;
-	unsigned int idiv;
-	size = 0; idiv = 10000;
-	while (idiv>=10) {
-		temp = (unsigned char)(that/idiv);
-		if (temp) {
-			that %= idiv;
-			cstr[size++] = temp + 0x30;
-		} else if (size)
-			cstr[size++] = 0x30;
-		idiv /= 10;
-	}
-	cstr[size++] = that + 0x30;
-	cstr[size] = 0x0;
-	return size;
-}
-unsigned char int16_2cstr(char* cstr, int that) {
-	if (that<0) {
-		that = -that;
-		*cstr = '-';
-		cstr++;
-	}
-	return uint16_2cstr(cstr,(unsigned int)that);
-}
-unsigned char cstr_2uint8(char* pstr, unsigned char* pval) {
-	unsigned char loop;
-	*pval = 0; loop = 0;
-	while (pstr[loop]) {
-		if (pstr[loop]<0x30||pstr[loop]>0x39) {
-			loop = 0;
-			break;
-		}
-		*pval = (*pval*10) + (pstr[loop]-0x30);
-		loop++;
-	}
-	return loop;
-}
-unsigned char cstr_2uint16(char* pstr, unsigned int* pval) {
-	unsigned char loop;
-	*pval = 0; loop = 0;
-	while (pstr[loop]) {
-		if (pstr[loop]<0x30||pstr[loop]>0x39) {
-			loop = 0;
-			break;
-		}
-		*pval = (*pval*10) + (pstr[loop]-0x30);
-		loop++;
-	}
-	return loop;
-}
-unsigned char cstr_2int16(char* pstr, int* pval) {
-	unsigned char loop, skip;
-	skip = (pstr[0]=='-') ? 1 : 0;
-	loop = cstr_2uint16(&pstr[skip],(unsigned int*)pval);
-	if (skip) *pval = -(*pval);
-	return loop;
-}
-#endif /** __MY1UTILS_H__ */
-</file>
-==== Library: Keypad ====
-<file c kpad.h>
-#ifndef __MY1KPAD_H__
-#define __MY1KPAD_H__
-/* 4x4 keypad interface {R0,R1,R2,R3,C0,C1,C2,C3} */
-/* 4x3 keypad interface {C1,R0,C0,R3,C2,R2,R1} */
-/** DefaultPins: C0-C3 => P1.4-P1.7, R0-R3 => P1.0-P1.3 */
-#ifndef KEY_DATA
-#define KEY_DATA P1
-#endif
-#ifndef _ROWS_AT_UPPER_
-#define ROWS_FLAG 0x01
-#define COLS_FLAG 0x10
-#else
-#define ROWS_FLAG 0x10
-#define COLS_FLAG 0x01
-#endif
-/** no-key indicator for keypad */
-#define KEY_NOT_CODE 0x10
-unsigned char key_scan(void) {
-	/** scan for key press */
-	unsigned char irow, icol, mask, test;
-	mask = ROWS_FLAG;
-	for (irow=0;irow<4;irow++) {
-		KEY_DATA = ~mask; test = COLS_FLAG;
-		for (icol=0;icol<4;icol++) {
-			if ((KEY_DATA&test)==0) {
-				while ((KEY_DATA&test)==0);
-				if (icol==3) return irow+0x0A;
-				if (irow==0) return icol+1;
-				if (irow==1) return icol+4;
-				if (irow==2) return icol+7;
-				if (icol==1) return 0;
-				return (icol>>1)+0x0e;
-			}
-			test <<= 1;
-		}
-		mask <<= 1;
-	}
-	return KEY_NOT_CODE;
-}
-unsigned char key_wait(void) {
-	/** wait for key press */
-	unsigned char scan;
-	while ((scan=key_scan())==KEY_NOT_CODE);
-	return scan;
-}
-</file>