bla

Makefile

@@ -8,6 +8,7 @@ CC = avr-gcc
 OBJCOPY = avr-objcopy
 AVRDUDE = avrdude
 CODE_FORMATTER = tooling/format-code.sh
+AVRSIZE = avr-size
 
 BOARD = atmega2560
 
@@ -42,13 +43,19 @@ CFLAGS =	-Wall \
 			-Werror \
 			-Wfatal-errors \
 			-Os \
+			-flto \
+			-fdata-sections \
+			-ffunction-sections \
 			-mmcu=$(BOARD) \
 			-DF_CPU=16000000UL \
 			-DGIT_DESCR=\"$(shell git describe --abbrev=6 --dirty --always --tags --long)\" \
+			-ffreestanding \
 			-std=c11
 
 # Linker flags
-LDFLAGS = -mmcu=$(BOARD)
+LDFLAGS =	-mmcu=$(BOARD) \
+			-flto \
+			-Wl,-gc-sections
 
 OBJCOPYARGS =	-O ihex \
 				-R .eeprom
@@ -62,6 +69,9 @@ AVRDUDEARGS =	-p $(BOARD) \
 				-V \
 				-D
 
+AVRSIZEARGS =	-C \
+				--mcu=$(BOARD)
+
 all: $(ELF) $(TARGET)
 
 %.o : %.c
@@ -83,6 +93,9 @@ install:
 	$(AVRDUDE) $(AVRDUDEARGS) -U flash:w:$(TARGET)
 
 format:
-	$(CODE_FORMATTER) $(SRC)
+	$(CODE_FORMATTER) $(SRCDIR)/*.c
 
-.PHONY: clean install format
+size:
+	$(AVRSIZE) $(AVRSIZEARGS) $(ELF)
+
+.PHONY: clean install format size

README.md

@@ -1,41 +0,0 @@
-# I237 Hardware Programming
-
-This here is my repository for hardware programming course at
-Estonian IT College that is based around a
-[Arduino Mega 2560](https://www.arduino.cc/en/Main/ArduinoBoardMega2560).
-
-This code us usualy updated once every two weeks when a new excersice is put up
-by Silver Kits.
-
-# How to install
-
-Currently to test this code you have to clone the repository
-
-```bash
-git clone https://git.wut.ee/arti/i237.git hardware
-cd hardware
-```
-
-And export a enviroment variable that points to a Arduino Mega board. The
-real path will depend on the OS and Computer that you are using. For me it is
-usualy `/dev/ttyACM0`.
-
-```bash
-export ARDUINO=/dev/ttyACM0
-```
-
-After that you can `make` the project.
-
-```bash
-make clean
-make
-make install
-```
-
-You can also chekcout previous labs using `git checkout <lab name>`. For example
-
-```bash
-git checkout lab02
-```
-
-Don't forget to `make clean` after each checkout!

src/hmi_msg.h

@@ -1,18 +1,26 @@
-#include <avr/pgmspace.h>
 #ifndef _HMI_MSG_H_
 #define _HMI_MSG_H_
 
-const char PROG_VERSION[]  PROGMEM = "Version: %s built on: %s %s\n";
+#define VER_FW "Version: %S built on: %S %S\n"
-const char LIBC_VERSION[]  PROGMEM = "avr-libc version: %s\n";
+#define VER_LIBC "avr-libc version: %S\n"
-const char STUD_NAME[]     PROGMEM = "Arti Zirk";
+#define UI_GET_MONTH_LETTER "Enter Month name first letter >"
-const char GET_MONTH_MSG[] PROGMEM = "Enter Month name first letter >";
+
-const char ENG_MONTH[6][9] PROGMEM = {
+#define STUD_NAME "Arti Zirk"
-                                        "January",
+const char string_1[] PROGMEM = "January";
-                                        "February",
+const char string_2[] PROGMEM = "February";
-                                        "March",
+const char string_3[] PROGMEM = "March";
-                                        "April",
+const char string_4[] PROGMEM = "April";
-                                        "May",
+const char string_5[] PROGMEM = "May";
-                                        "June",
+const char string_6[] PROGMEM = "June";
+
+PGM_P const months_table[] PROGMEM = 
+{
+    string_1,
+    string_2,
+    string_3,
+    string_4,
+    string_5,
+    string_6
 };
 
 #endif /* _HMI_MSG_H_ */

src/main.c

@@ -1,8 +1,8 @@
 #include <stdio.h>
 #include <string.h>
 #include <avr/io.h>
-#include <avr/pgmspace.h>
 #include <util/delay.h>
+#include <avr/pgmspace.h>
 #include "hmi_msg.h"
 #include "uart.h"
 #include "print_helper.h"
@@ -12,56 +12,53 @@
 
 int main (void)
 {
-    /* Init */
+    /* set pin 3 of PORTA for output*/
     DDRA |= _BV(DDA3);
+    /* Init stdio on UART0 and UART3 and print user code info */
     uart0_init();
     uart3_init();
-    stdout = stdin = &uart0_io;
-    stderr = &uart3_out;
     lcd_init();
     lcd_clrscr();
-    /* End init */
+    stdout = stdin = &uart0_io;
-
+    stderr = &uart3_out;
-    /* Print version info to stderr */
+    fprintf_P(stderr, PSTR(VER_FW),
-    fprintf_P(stderr, PROG_VERSION, GIT_DESCR, __DATE__, __TIME__);
+              PSTR(GIT_DESCR), PSTR(__DATE__), PSTR(__TIME__));
-    fprintf_P(stderr, LIBC_VERSION, __AVR_LIBC_VERSION_STRING__);
+    fprintf_P(stderr, PSTR(VER_LIBC), PSTR(__AVR_LIBC_VERSION_STRING__));
-    /* End version print */
+    /* End stdio init and info print */
-
+    fprintf_P(stdout, PSTR(STUD_NAME "\n"));
-    fprintf_P(stdout, STUD_NAME);
+    lcd_puts_P(PSTR(STUD_NAME));
-    fputc('\n', stdout); /* Add a new line to the uart printout */
-    lcd_puts_P(STUD_NAME);
-    lcd_goto(0x40); /* Got to the beginning of the next line */
-
     /* ASCII table print */
     print_ascii_tbl(stdout);
     unsigned char ascii[128] = {0};
+
     for (unsigned char i = 0; i < sizeof(ascii); i++) {
         ascii[i] = i;
     }
+
     print_for_human(stdout, ascii, sizeof(ascii));
 
     while (1) {
-        /* set pin 3 high to turn led on */
-        PORTA |= _BV(PORTA3);
-        _delay_ms(BLINK_DELAY_MS);
-
-        /* Month search and print */
         char month_first_leter;
-        fprintf_P(stdout, GET_MONTH_MSG);
+        fprintf_P(stdout, PSTR(UI_GET_MONTH_LETTER));
         fscanf(stdin, "%c", &month_first_leter);
         fprintf(stdout, "%c\n", month_first_leter);
+        lcd_goto(0x40);
+
         for (int i = 0; i < 6; i++) {
-            if (!strncmp_P(&month_first_leter, ENG_MONTH[i], 1)) {
+            if (!strncmp_P(&month_first_leter, (PGM_P)pgm_read_word(&months_table[i]), 1)) {
-                fprintf_P(stdout, ENG_MONTH[i]);
+                fprintf_P(stdout, PSTR("%S\n"), (PGM_P)pgm_read_word(&months_table[i]));
-                fputc('\n', stdout);
+                lcd_puts_P((PGM_P)pgm_read_word(&months_table[i]));
-                lcd_puts_P(ENG_MONTH[i]);
                 lcd_putc(' ');
             }
         }
-        lcd_puts_P(PSTR("                ")); /* Clear the end of the line */
-        lcd_goto(0x40); /* Got to the beginning of the next line */
 
+        for (int i = 0; i < 16; i++) {
+            lcd_putc(' ');
+        }
 
+        /* set pin 3 high to turn led on */
+        PORTA |= _BV(PORTA3);
+        _delay_ms(BLINK_DELAY_MS);
         /* set pin 3 low to turn led off */
         PORTA &= ~_BV(PORTA3);
         _delay_ms(BLINK_DELAY_MS);

src/print_helper.c

@@ -1,17 +1,20 @@
 #include <stdio.h>
 #include "print_helper.h"
 
-int print_ascii_tbl (FILE *stream) {
+int print_ascii_tbl (FILE *stream)
+{
     for (char c = ' '; c <= '~'; c++) {
         if (!fprintf(stream, "%c ", c)) {
             return 0;
         }
     }
+
     return fprintf(stream, "\n");
 }
 
 
-int print_for_human (FILE *stream, const unsigned char *array, const int len) {
+int print_for_human (FILE *stream, const unsigned char *array, const int len)
+{
     for (int i = 0; i < len; i++) {
         if (array[i] >= ' ' && array[i] <= '~') {
             if (!fprintf(stream, "%c", array[i])) {
@@ -23,5 +26,6 @@ int print_for_human (FILE *stream, const unsigned char *array, const int len) {
             }
         }
     }
+
     return fprintf(stream, "\n");;
 }