From 9931aaf299e3d8c1263cc7f1148bd1e6fe7314e8 Mon Sep 17 00:00:00 2001
From: Jimmy <me@jimmy.nz>
Date: Thu, 10 Dec 2020 14:58:46 +1300
Subject: [PATCH] Intial commit
---
.gitignore | 2 ++
makefile | 28 ++++++++++++++++++++++
src/main.cpp | 21 +++++++++++++++++
src/usart.cpp | 65 +++++++++++++++++++++++++++++++++++++++++++++++++++
src/usart.h | 14 +++++++++++
term.py | 13 +++++++++++
6 files changed, 143 insertions(+)
create mode 100644 .gitignore
create mode 100644 makefile
create mode 100644 src/main.cpp
create mode 100644 src/usart.cpp
create mode 100644 src/usart.h
create mode 100644 term.py
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..662f6d5
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+.vscode/
+bin/
diff --git a/makefile b/makefile
new file mode 100644
index 0000000..661d854
--- /dev/null
+++ b/makefile
@@ -0,0 +1,28 @@
+MCU=atmega32
+F_CPU=8000000
+PROG=dragon_jtag
+PORT?=/dev/ttyUSB0
+CC=avr-g++
+OBJCOPY=avr-objcopy
+CFLAGS=-Wall -g -mmcu=${MCU} -DF_CPU=${F_CPU} -I.
+TARGET=main
+SRCS= src/*.cpp
+
+all: build flash
+
+build:
+ ${CC} ${CFLAGS} -o bin/${TARGET}.bin ${SRCS}
+ ${CC} ${CFLAGS} -o bin/${TARGET}.elf ${SRCS}
+ ${OBJCOPY} -j .text -j .data -O ihex bin/${TARGET}.bin bin/${TARGET}.hex
+
+flash:
+ avrdude -p ${MCU} -c ${PROG} -U flash:w:bin/main.hex
+
+clean:
+ rm -f bin/*
+
+term:
+ python3 term.py
+
+avarice:
+ avarice --program --file bin/main.elf --part atmega32 --dragon :4242
diff --git a/src/main.cpp b/src/main.cpp
new file mode 100644
index 0000000..770521e
--- /dev/null
+++ b/src/main.cpp
@@ -0,0 +1,21 @@
+#include <avr/io.h>
+#include <avr/interrupt.h>
+#include "usart.h"
+#include <util/delay.h>
+
+
+
+
+
+int main (void) {
+ DDRD |= (1<<PD3)|(1<<PD4)|(1<<PD5);
+ usart::init(9600);
+ for (;;) {// Loop forever
+ usart::put('A');
+ //printf("Hello");
+ PORTD ^= (1<<PD3)|(1<<PD4)|(1<<PD5);
+ _delay_ms(1000);
+
+ }
+}
+
diff --git a/src/usart.cpp b/src/usart.cpp
new file mode 100644
index 0000000..4758601
--- /dev/null
+++ b/src/usart.cpp
@@ -0,0 +1,65 @@
+#include <avr/io.h>
+#include <avr/interrupt.h>
+#include "usart.h"
+
+namespace usart
+{
+ namespace {
+ static FILE mystdout;
+ }
+
+ void init( unsigned long baud) {
+ fdev_setup_stream(&mystdout, put_printf, NULL, _FDEV_SETUP_WRITE);
+ stdout = &mystdout;
+ const unsigned int ubrr = F_CPU/8/baud-1;
+
+ /*Set baud rate */
+
+
+ #if defined __AVR_ATmega328P__
+ UBRR0H = (unsigned char)(ubrr>>8);
+ UBRR0L = (unsigned char)ubrr;
+ UCSR0A |= (1<<U2X0);
+ //Enable receiver and transmitter
+ UCSR0B = (1<<RXEN0)|(1<<TXEN0);
+ //UCSRB |= (1<< RXCIE)|(1<<TXCIE);
+ /* Set frame format: 8data, 2stop bit */
+ UCSR0C = (1<<USBS0)|(3<<UCSZ00);
+ #elif defined __AVR_ATmega32__ || defined __AVR_ATmega16__
+ UBRRH = (unsigned char)(ubrr>>8);
+ UBRRL = (unsigned char)ubrr;
+ UCSRA |= (1<<U2X);
+ //Enable receiver and transmitter
+ UCSRB = (1<<RXEN)|(1<<TXEN);
+ //UCSRB |= (1<< RXCIE)|(1<<TXCIE);
+ /* Set frame format: 8data, 2stop bit */
+ UCSRC = (1 << URSEL)|(3<<UCSZ0);
+ #endif
+
+ }
+
+ void put(char data) {
+ #if defined __AVR_ATmega328P__
+ while ( !( UCSR0A & (1<<UDRE0)) ); UDR0 = data;
+ #elif defined __AVR_ATmega32__ || defined __AVR_ATmega16__
+ while ( !( UCSRA & (1<<UDRE)) ); UDR = data;
+ #endif
+
+
+ }
+
+ char get( void ) {
+ #if defined __AVR_ATmega328P__
+ while ( !(UCSR0A & (1<<RXC0)) ); return UDR0;
+ #elif defined __AVR_ATmega32__ || defined __AVR_ATmega16__
+ while ( !(UCSRA & (1<<RXC)) ); return UDR;
+ #endif
+ }
+
+ int put_printf(char var, FILE *stream) {
+ put(var);
+ return 0;
+ }
+} // namespace usart
+
+
diff --git a/src/usart.h b/src/usart.h
new file mode 100644
index 0000000..ffad848
--- /dev/null
+++ b/src/usart.h
@@ -0,0 +1,14 @@
+#pragma once
+
+#include <stdio.h>
+
+namespace usart
+{
+ void init(unsigned long baud);
+ void put(char data );
+ char get();
+ int put_printf(char var, FILE *stream);
+} // namespace usart
+
+
+
diff --git a/term.py b/term.py
new file mode 100644
index 0000000..a6c0b3d
--- /dev/null
+++ b/term.py
@@ -0,0 +1,13 @@
+import serial
+from time import sleep
+
+with serial.Serial('/dev/ttyUSB0', 9600, timeout=1) as ser:
+ ser.write(b'a')
+ while True:
+ x = ser.read() # read one byte
+ if x != b'':
+ pass
+ print(x.decode('utf'))
+ #ser.write(b'a')
+ #print(ser.read())
+ sleep(1)
\ No newline at end of file