Differences

This shows you the differences between two versions of the page.

--- archive:nmk322 [2024/10/17 12:58] – [Library: Serial (UART)] azman
+++ archive:nmk322 [2024/12/19 11:56] (current) – [Lecture Slides] azman
@@ Line 13: / Line 13: @@
   * 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}}
+  * Lecture 7 - {{:archive:nmk322:lecture07_interrupt.pdf|8051 Interrupt}}
+  * Lecture 8 - {{:archive:nmk322:lecture08_system.pdf|8051 System Management}}
-===== Codes (discussed in class) =====
+===== 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) ====
@@ Line 136: / Line 145: @@
 </file>
-===== Test Codes =====
+==== Library: Utilities (str-int conversions) ====
-These are not meant for class - just something I use to test boards/modules.
+<file c utils.h>
+#ifndef __MY1UTILS_H__
+#define __MY1UTILS_H__
-==== Test Code for Base Kit ====
+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;
+}
-<file c basetest.c>
+unsigned char int8_2cstr(char* cstr, signed char that) {
-/*----------------------------------------------------------------------------*/
+	if (that<0) {
-/* override default tick values */
+		that = -that;
-#define TIMER_TICK_LEN TIMER_VAL50MS
+		*cstr = '-';
-#define TIMER_TICK_CNT TIMER_LOOP_1S
+		cstr++;
-/*----------------------------------------------------------------------------*/
+	}
-#include "my1stc51.h"
+	return uint8_2cstr(cstr,(unsigned char)that);
-#include "timer_tick.h"
+}
-#include "led7seg.h"
-/*----------------------------------------------------------------------------*/
+unsigned char uint16_2cstr(char* cstr, unsigned int that) {
-void main(void) {
+	unsigned char size, temp;
-	unsigned char loop, mask, seg7[] = { _7SEGNUM_CC_ };
+	unsigned int idiv;
-	P1MODE1(); // better pullup current
+	size = 0; idiv = 10000;
-	loop = 0; mask = (!P2_7)?0xff:0x00;
+	while (idiv>=10) {
-	P1 = seg7[loop] ^ mask;
+		temp = (unsigned char)(that/idiv);
-	timer_init();
+		if (temp) {
-	timer_tick_exec();
+			that %= idiv;
-	while (1) {
+			cstr[size++] = temp + 0x30;
-		P2_0 = !P3_7;
+		} else if (size)
-		P2_1 = !P3_6;
+			cstr[size++] = 0x30;
-		P2_2 = !P3_5;
+		idiv /= 10;
-		P2_3 = !P3_4;
+	}
-		if (timer_ticked()) {
+	cstr[size++] = that + 0x30;
-			loop++; if (loop==10) loop = 0;
+	cstr[size] = 0x0;
-			mask = (!P2_7)?0xff:0x00;
+	return size;
-			P1 = seg7[loop] ^ mask;
+}
-			timer_tick00();
+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>