Experimental implementation of the Olimex AVR-MT128 development board

- Board simulation supports LCD and buttons. - Two example firmware: Olimex's display example and a Mini Tetris game - Extended LCD part with support for CGRAM TODOs: - Improve LCD part - add all character patterns (from ROM Code A00) - get rid of binary integer literals - Add LED - Add UART
akosthekiss · Oct 13, 2020 · 734c24f · 734c24f
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diff --git a/examples/board_olimex_avr_mt128/Makefile b/examples/board_olimex_avr_mt128/Makefile
@@ -0,0 +1,53 @@
+#
+# 	Copyright 2008-2011 Michel Pollet <buserror@gmail.com>
+#
+#	This file is part of simavr.
+#
+#	simavr is free software: you can redistribute it and/or modify
+#	it under the terms of the GNU General Public License as published by
+#	the Free Software Foundation, either version 3 of the License, or
+#	(at your option) any later version.
+#
+#	simavr is distributed in the hope that it will be useful,
+#	but WITHOUT ANY WARRANTY; without even the implied warranty of
+#	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#	GNU General Public License for more details.
+#
+#	You should have received a copy of the GNU General Public License
+#	along with simavr.  If not, see <http://www.gnu.org/licenses/>.
+
+target = mt128
+firmware_srcs = ${wildcard at*.c}
+
+simavr = ../../
+
+IPATH = .
+IPATH += ../parts
+IPATH += ${simavr}/include
+IPATH += ${simavr}/simavr/sim
+
+VPATH = .
+VPATH += ../parts
+
+LDFLAGS += -lpthread
+
+include ../Makefile.opengl
+
+all: obj axf ${target}
+
+axf: ${firmware_srcs:.c=.axf}
+
+include ${simavr}/Makefile.common
+
+board = ${OBJ}/${target}.elf
+
+${board} : ${OBJ}/button.o
+${board} : ${OBJ}/hd44780.o
+${board} : ${OBJ}/hd44780_glut.o
+${board} : ${OBJ}/${target}.o
+
+${target}: ${board}
+	@echo $@ done
+
+clean: clean-${OBJ}
+	rm -rf *.hex *.a *.axf *.vcd .*.swo .*.swp .*.swm .*.swn
diff --git a/examples/board_olimex_avr_mt128/README b/examples/board_olimex_avr_mt128/README
@@ -0,0 +1,8 @@
+board_olimex_avr_mt128
+
+(C) 2020 Akos Kiss <akiss@inf.u-szeged.hu>
+
+Experimental Olimex AVR-MT128 development board simulation.
+Based on works of and sample code from
+- Michel Pollet <buserror@gmail.com> and
+- Luki <humbell@ethz.ch>.
diff --git a/examples/board_olimex_avr_mt128/atmega128_display.c b/examples/board_olimex_avr_mt128/atmega128_display.c
@@ -0,0 +1,292 @@
+// NOTE: lines below added to allow compilation in simavr's build system
+#undef F_CPU
+#define F_CPU 16000000
+#include "avr_mcu_section.h"
+AVR_MCU(F_CPU, "atmega128");
+
+/*	Sample program for Olimex AVR-MT-128 with ATMega-128 processor
+ *	Button 1 (Up)		- Turn ON the display
+ *	Button 2 (Left)		- Set Text1 on the upline
+ *	Button 3 (Middle)	- Hold to slide Text
+ *	Button 4 (Right)	- Set Text2 on the downline
+ *	Button 5 (Down)		- Turn OFF the display
+ *	Compile with AVRStudio+WinAVR (gcc version 3.4.6)
+ */
+
+ #define Text1	"Conflux"
+ #define Text2	"Rampard"
+
+
+
+#include "avr/io.h"
+#include "avr_lcd.h" // NOTE: changed header name to better fit in simavr's file naming conventions
+
+#define	__AVR_ATMEGA128__	1
+
+unsigned char data, Line = 0;
+char Text[16], Ch;
+unsigned int Bl = 1, LCD_State = 0, i, j;
+
+void Delay(unsigned int b)
+{
+  volatile unsigned int a = b;  // NOTE: volatile added to prevent the compiler to optimization the loop away
+  while (a)
+	{
+		a--;
+	}
+}
+
+/*****************************L C D**************************/
+
+void E_Pulse()
+{
+	PORTC = PORTC | 0b00000100;	//set E to high
+	Delay(1400); 				//delay ~110ms
+	PORTC = PORTC & 0b11111011;	//set E to low
+}
+
+void LCD_Init()
+{
+	//LCD initialization
+	//step by step (from Gosho) - from DATASHEET
+
+	PORTC = PORTC & 0b11111110;
+
+	Delay(10000);
+
+
+	PORTC = 0b00110000;						//set D4, D5 port to 1
+	E_Pulse();								//high->low to E port (pulse)
+	Delay(1000);
+
+	PORTC = 0b00110000;						//set D4, D5 port to 1
+	E_Pulse();								//high->low to E port (pulse)
+	Delay(1000);
+
+	PORTC = 0b00110000;						//set D4, D5 port to 1
+	E_Pulse();								//high->low to E port (pulse)
+	Delay(1000);
+
+	PORTC = 0b00100000;						//set D4 to 0, D5 port to 1
+	E_Pulse();								//high->low to E port (pulse)
+}
+
+void LCDSendCommand(unsigned char a)
+{
+	data = 0b00001111 | a;					//get high 4 bits
+	PORTC = (PORTC | 0b11110000) & data;	//set D4-D7
+	PORTC = PORTC & 0b11111110;				//set RS port to 0
+	E_Pulse();                              //pulse to set D4-D7 bits
+
+	data = a<<4;							//get low 4 bits
+	PORTC = (PORTC & 0b00001111) | data;	//set D4-D7
+	PORTC = PORTC & 0b11111110;				//set RS port to 0 -> display set to command mode
+	E_Pulse();                              //pulse to set d4-d7 bits
+
+}
+
+void LCDSendChar(unsigned char a)
+{
+	data = 0b00001111 | a;					//get high 4 bits
+	PORTC = (PORTC | 0b11110000) & data;	//set D4-D7
+	PORTC = PORTC | 0b00000001;				//set RS port to 1
+	E_Pulse();                              //pulse to set D4-D7 bits
+
+	data = a<<4;							//get low 4 bits
+	PORTC = (PORTC & 0b00001111) | data;	//clear D4-D7
+	PORTC = PORTC | 0b00000001;				//set RS port to 1 -> display set to command mode
+	E_Pulse();                              //pulse to set d4-d7 bits
+}
+
+void LCDSendTxt(char* a)
+{
+	int Temp;
+	for(Temp=0; Temp<strlen(a); Temp++)
+  {
+    LCDSendChar(a[Temp]);
+  }
+}
+
+void LCDSendInt(long a)
+{
+	int C[20];
+	unsigned char Temp=0, NumLen = 0;
+	if (a < 0)
+	{
+		LCDSendChar('-');
+		a = -a;
+	}
+	do
+	{
+		Temp++;
+		C[Temp] = a % 10;
+		a = a/10;
+	}
+	while (a);
+	NumLen = Temp;
+	for (Temp = NumLen; Temp>0; Temp--) LCDSendChar(C[Temp] + 48);
+}
+
+void LCDSendInt_Old(int a)
+{
+  int h = 0;
+  int l = 0;
+
+  l = a%10;
+  h = a/10;
+
+  LCDSendChar(h+48);
+  LCDSendChar(l+48);
+}
+
+void SmartUp(void)
+{
+	int Temp;
+	for(Temp=0; Temp<1; Temp++) LCDSendCommand(CUR_UP);
+}
+
+void SmartDown(void)
+{
+	int Temp;
+	for(Temp=0; Temp<40; Temp++) LCDSendCommand(CUR_DOWN);
+}
+
+void Light(short a)
+{
+  if(a == 1)
+  {
+	PORTC = PORTC | 0b00100000;
+	DDRC = PORTC | 0b00100000;
+
+    //IO0SET_bit.P0_25 = 1;
+    //IO0DIR_bit.P0_25 = 1;
+  }
+  if(a == 0)
+  {
+    PORTC = PORTC & 0b11011111;
+    DDRC = DDRC & 0b11011111;
+
+    //IO0SET_bit.P0_25 = 0;
+    //IO0DIR_bit.P0_25 = 0;
+  }
+
+}
+
+/*****************************L C D**************************/
+
+void Port_Init()
+{
+	PORTA = 0b00011111;		DDRA = 0b01000000; // NOTE: set A4-0 to initialize buttons to unpressed state
+	PORTB = 0b00000000;		DDRB = 0b00000000;
+	PORTC = 0b00000000;		DDRC = 0b11110111;
+	PORTD = 0b11000000;		DDRD = 0b00001000;
+	PORTE = 0b00000000;		DDRE = 0b00110000;
+	PORTF = 0b00000000;		DDRF = 0b00000000;
+	PORTG = 0b00000000;		DDRG = 0b00000000;
+}
+
+int main()
+{
+	Port_Init();
+	LCD_Init();
+	// NOTE: added missing initialization steps
+	LCDSendCommand(0x28); // function set: 4 bits interface, 2 display lines, 5x8 font
+	LCDSendCommand(DISP_OFF); // display off, cursor off, blinking off
+	LCDSendCommand(CLR_DISP); // clear display
+	LCDSendCommand(0x06); // entry mode set: cursor increments, display does not shift
+
+	LCDSendCommand(DISP_OFF);
+	while (1)
+	{
+		//Value of Bl prevents holding the buttons
+		//Bl = 0: One of the Buttons is pressed, release to press again
+		//LCD_State value is the state of LCD: 1 - LCD is ON; 0 - LCD is OFF
+
+		//Up Button (Button 1) : Turn ON Display
+ 		if (!(PINA & 0b00000001) & Bl & !(LCD_State))	//check state of button 1 and value of Bl and LCD_State
+		{
+			LCDSendCommand(DISP_ON);		//Turn ON Display
+			LCDSendCommand(CLR_DISP);		//Clear Display
+			LCDSendTxt("    Welcome     ");	//Print welcome screen
+			Bl = 0;							//Button is pressed
+			LCD_State = 1;					//Display is ON (LCD_State = 1)
+		}
+
+		//Left Button (Button 2) : Set Text1
+		if (!(PINA & 0b00000010) & Bl & LCD_State)		//check state of button 2 and value of Bl and LCD_State
+		{
+			LCDSendCommand(CLR_DISP);			//Clear Display
+			LCDSendCommand(DD_RAM_ADDR);		//set to Line 1
+			for (i=0; i<16; i++) Text[i] = 0;	//Clear Text
+			strcpy(Text, Text1);				//set Text
+			for (i=0; i<16; i++)
+				if (Text[i] == 0) Text[i] = ' ';//fill the Text with space
+			//LCDSendTxt(Text);					//Print the text
+			for (i=0; i<16; i++) LCDSendChar(Text[i]);
+			Bl = 0;								//Button is pressed
+			Line = 1;							//text must be print on up line
+		}
+
+		//Middle Button (Button 3) : Slide the text
+		if (!(PINA & 0b00000100) & Bl & LCD_State)
+		{
+			while (!(PINA & 0b00000100) & (Line != 0))
+			//check state of button 3 and value of Line (Line = 0 - no text selected)
+			{
+				//sliding the text
+				for(i=60000; i; i--);
+				Ch = Text[0];
+				for (i=0; i<15; i++) Text[i] = Text[i+1];
+				Text[15] = Ch;
+
+				//print the text in the correct line
+				if (Line == 1)
+					LCDSendCommand(DD_RAM_ADDR);
+				else
+					LCDSendCommand(DD_RAM_ADDR2);
+				//LCDSendTxt(Text);
+				for (i=0; i<16; i++) LCDSendChar(Text[i]);
+			}
+		}
+
+		//Right Button (Button 4) Set Text2
+		if (!(PINA & 0b00001000) & Bl & LCD_State)	//check state of button 4 and value of Bl and LCD_State
+		{
+			LCDSendCommand(CLR_DISP);			//Clear Display
+			LCDSendCommand(DD_RAM_ADDR2);		//set to Line 2
+			for (i=0; i<16; i++) Text[i] = 0;	//Clear Text
+			strcpy(Text, Text2);				//set Text
+			for (i=0; i<16; i++)
+				if (Text[i] == 0) Text[i] = ' ';//fill the Text with space
+			//LCDSendTxt(Text);					//Print the text
+			for (i=0; i<16; i++) LCDSendChar(Text[i]);
+			Bl = 0;								//Button is pressed
+			Line = 2;							//text must be print on down line
+		}
+
+		//Down Button (Button 5) Turn OFF Display
+		if (!(PINA & 0b00010000) & Bl & LCD_State)	//check state of button 5 and value of Bl and LCD_State
+		{
+			LCDSendCommand(CLR_DISP);			//Clear Display
+			LCDSendTxt("    Turn OFF    ");		//Print Turn OFF message
+			for (i=30; i; i--)
+			for (j=30000; j; j--);				//simple delay
+			Bl = 0;								//Button is pressed
+			LCDSendCommand(DISP_OFF);			//Display is OFF ==> LCD_State = 0, Line = 0
+			LCD_State = 0;
+			Line = 0;
+		}
+
+		//check state of all buttons
+		if (
+			((PINA & 0b00000001)
+			|(PINA & 0b00000010)
+			|(PINA & 0b00000100)
+			|(PINA & 0b00001000)
+			|(PINA & 0b00010000)) == 31)
+		Bl = 1;		//if all buttons are released Bl gets value 1
+
+
+	}
+	return 0;
+}