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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
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# | ||
# 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/>. | ||
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target = mt128 | ||
firmware_srcs = ${wildcard at*.c} | ||
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simavr = ../../ | ||
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IPATH = . | ||
IPATH += ../parts | ||
IPATH += ${simavr}/include | ||
IPATH += ${simavr}/simavr/sim | ||
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VPATH = . | ||
VPATH += ../parts | ||
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LDFLAGS += -lpthread | ||
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include ../Makefile.opengl | ||
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all: obj axf ${target} | ||
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axf: ${firmware_srcs:.c=.axf} | ||
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include ${simavr}/Makefile.common | ||
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board = ${OBJ}/${target}.elf | ||
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${board} : ${OBJ}/button.o | ||
${board} : ${OBJ}/hd44780.o | ||
${board} : ${OBJ}/hd44780_glut.o | ||
${board} : ${OBJ}/${target}.o | ||
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${target}: ${board} | ||
@echo $@ done | ||
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clean: clean-${OBJ} | ||
rm -rf *.hex *.a *.axf *.vcd .*.swo .*.swp .*.swm .*.swn |
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board_olimex_avr_mt128 | ||
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(C) 2020 Akos Kiss <akiss@inf.u-szeged.hu> | ||
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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>. |
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// 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"); | ||
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/* 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) | ||
*/ | ||
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#define Text1 "Conflux" | ||
#define Text2 "Rampard" | ||
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#include "avr/io.h" | ||
#include "avr_lcd.h" // NOTE: changed header name to better fit in simavr's file naming conventions | ||
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#define __AVR_ATMEGA128__ 1 | ||
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unsigned char data, Line = 0; | ||
char Text[16], Ch; | ||
unsigned int Bl = 1, LCD_State = 0, i, j; | ||
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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--; | ||
} | ||
} | ||
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/*****************************L C D**************************/ | ||
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void E_Pulse() | ||
{ | ||
PORTC = PORTC | 0b00000100; //set E to high | ||
Delay(1400); //delay ~110ms | ||
PORTC = PORTC & 0b11111011; //set E to low | ||
} | ||
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void LCD_Init() | ||
{ | ||
//LCD initialization | ||
//step by step (from Gosho) - from DATASHEET | ||
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PORTC = PORTC & 0b11111110; | ||
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Delay(10000); | ||
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PORTC = 0b00110000; //set D4, D5 port to 1 | ||
E_Pulse(); //high->low to E port (pulse) | ||
Delay(1000); | ||
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PORTC = 0b00110000; //set D4, D5 port to 1 | ||
E_Pulse(); //high->low to E port (pulse) | ||
Delay(1000); | ||
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PORTC = 0b00110000; //set D4, D5 port to 1 | ||
E_Pulse(); //high->low to E port (pulse) | ||
Delay(1000); | ||
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PORTC = 0b00100000; //set D4 to 0, D5 port to 1 | ||
E_Pulse(); //high->low to E port (pulse) | ||
} | ||
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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 | ||
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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 | ||
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} | ||
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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 | ||
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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 | ||
} | ||
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void LCDSendTxt(char* a) | ||
{ | ||
int Temp; | ||
for(Temp=0; Temp<strlen(a); Temp++) | ||
{ | ||
LCDSendChar(a[Temp]); | ||
} | ||
} | ||
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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); | ||
} | ||
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void LCDSendInt_Old(int a) | ||
{ | ||
int h = 0; | ||
int l = 0; | ||
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l = a%10; | ||
h = a/10; | ||
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LCDSendChar(h+48); | ||
LCDSendChar(l+48); | ||
} | ||
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void SmartUp(void) | ||
{ | ||
int Temp; | ||
for(Temp=0; Temp<1; Temp++) LCDSendCommand(CUR_UP); | ||
} | ||
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void SmartDown(void) | ||
{ | ||
int Temp; | ||
for(Temp=0; Temp<40; Temp++) LCDSendCommand(CUR_DOWN); | ||
} | ||
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void Light(short a) | ||
{ | ||
if(a == 1) | ||
{ | ||
PORTC = PORTC | 0b00100000; | ||
DDRC = PORTC | 0b00100000; | ||
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//IO0SET_bit.P0_25 = 1; | ||
//IO0DIR_bit.P0_25 = 1; | ||
} | ||
if(a == 0) | ||
{ | ||
PORTC = PORTC & 0b11011111; | ||
DDRC = DDRC & 0b11011111; | ||
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//IO0SET_bit.P0_25 = 0; | ||
//IO0DIR_bit.P0_25 = 0; | ||
} | ||
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} | ||
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/*****************************L C D**************************/ | ||
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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; | ||
} | ||
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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 | ||
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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 | ||
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//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) | ||
} | ||
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//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 | ||
} | ||
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//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; | ||
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//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]); | ||
} | ||
} | ||
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//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 | ||
} | ||
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//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; | ||
} | ||
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//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 | ||
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} | ||
return 0; | ||
} |
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