AVRFreaks.net

From Protocol.h
#define INIT   0
#define TXDATA 1
#define RXDATA 2


From Protocol.c
void (*Protocol[][Idx])() =
{
#if defined (UART)
    ProtocolInit[Idx] = UartInit();
    ProtocolTxData[Idx] = UartTxData();
    ProtocolRxData[Idx] = UartRxData();

#elif
    ProtocolInit[Idx] = SpiInit();
    ProtocolTxData[Idx] = SpiTxData();
    ProtocolRxData[Idx] = SpiRxData();
#endif
}

Protocol[INIT][Idx]

Protocol[TXDATA][Idx]

Protocol[RXDATA][Idx]

uint8_t checkSend;

extern uint8_t checkSend;

//In .h file
static BOOL SendCommand_SDC(uint8_t uchCommand, uint32_t uiArgument, uint8_t *puchResponse);

//In .c file
static BOOL SendCommand_SDC(uint8_t uchCommand, uint32_t uiArgument, uint8_t *puchResponse)
{
...code
}

# Name: Makefile
# Author: <insert your name here>
# Copyright: <insert your copyright message here>
# License: <insert your license reference here>

# This is a prototype Makefile. Modify it according to your needs.
# You should at least check the settings for
# DEVICE ....... The AVR device you compile for
# CLOCK ........ Target AVR clock rate in Hertz
# OBJECTS ...... The object files created from your source files. This list is
#                usually the same as the list of source files with suffix ".o".
# PROGRAMMER ... Options to avrdude which define the hardware you use for
#                uploading to the AVR and the interface where this hardware
#                is connected.
# FUSES ........ Parameters for avrdude to flash the fuses appropriately.

DEVICE     = atmega8
CLOCK      = 8000000
PROGRAMMER = -c stk500v2 -P /dev/tty.usbserial-A3000HDB
OBJECTS    = main.o
FUSES      = -U hfuse:w:0xd9:m -U lfuse:w:0x24:m
# ATMega8 fuse bits (fuse bits for other devices are different!):
# Example for 8 MHz internal oscillator
# Fuse high byte:
# 0xd9 = 1 1 0 1   1 0 0 1 <-- BOOTRST (boot reset vector at 0x0000)
#        ^ ^ ^ ^   ^ ^ ^------ BOOTSZ0
#        | | | |   | +-------- BOOTSZ1
#        | | | |   +---------- EESAVE (set to 0 to preserve EEPROM over chip erase)
#        | | | +-------------- CKOPT (clock option, depends on oscillator type)
#        | | +---------------- SPIEN (if set to 1, serial programming is disabled)
#        | +------------------ WDTON (if set to 0, watchdog is always on)
#        +-------------------- RSTDISBL (if set to 0, RESET pin is disabled)
# Fuse low byte:
# 0x24 = 0 0 1 0   0 1 0 0
#        ^ ^ \ /   \--+--/
#        | |  |       +------- CKSEL 3..0 (8M internal RC)
#        | |  +--------------- SUT 1..0 (slowly rising power)
#        | +------------------ BODEN (if 0, brown-out detector is enabled)
#        +-------------------- BODLEVEL (if 0: 4V, if 1: 2.7V)

# Example for 12 MHz external crystal:
# Fuse high byte:
# 0xc9 = 1 1 0 0   1 0 0 1 <-- BOOTRST (boot reset vector at 0x0000)
#        ^ ^ ^ ^   ^ ^ ^------ BOOTSZ0
#        | | | |   | +-------- BOOTSZ1
#        | | | |   +---------- EESAVE (set to 0 to preserve EEPROM over chip erase)
#        | | | +-------------- CKOPT (clock option, depends on oscillator type)
#        | | +---------------- SPIEN (if set to 1, serial programming is disabled)
#        | +------------------ WDTON (if set to 0, watchdog is always on)
#        +-------------------- RSTDISBL (if set to 0, RESET pin is disabled)
# Fuse low byte:
# 0x9f = 1 0 0 1   1 1 1 1
#        ^ ^ \ /   \--+--/
#        | |  |       +------- CKSEL 3..0 (external >8M crystal)
#        | |  +--------------- SUT 1..0 (crystal osc, BOD enabled)
#        | +------------------ BODEN (if 0, brown-out detector is enabled)
#        +-------------------- BODLEVEL (if 0: 4V, if 1: 2.7V)


# Tune the lines below only if you know what you are doing:

AVRDUDE = avrdude $(PROGRAMMER) -p $(DEVICE)
COMPILE = avr-gcc -Wall -Os -DF_CPU=$(CLOCK) -mmcu=$(DEVICE)

# symbolic targets:
all:   main.hex

.c.o:
   $(COMPILE) -c $< -o $@

.S.o:
   $(COMPILE) -x assembler-with-cpp -c $< -o $@
# "-x assembler-with-cpp" should not be necessary since this is the default
# file type for the .S (with capital S) extension. However, upper case
# characters are not always preserved on Windows. To ensure WinAVR
# compatibility define the file type manually.

.c.s:
   $(COMPILE) -S $< -o $@

flash:   all
   $(AVRDUDE) -U flash:w:main.hex:i

fuse:
   $(AVRDUDE) $(FUSES)

# Xcode uses the Makefile targets "", "clean" and "install"
install: flash fuse

# if you use a bootloader, change the command below appropriately:
load: all
   bootloadHID main.hex

clean:
   rm -f main.hex main.elf $(OBJECTS)

# file targets:
main.elf: $(OBJECTS)
   $(COMPILE) -o main.elf $(OBJECTS)

main.hex: main.elf
   rm -f main.hex
   avr-objcopy -j .text -j .data -O ihex main.elf main.hex
# If you have an EEPROM section, you must also create a hex file for the
# EEPROM and add it to the "flash" target.

# Targets for code debugging and analysis:
disasm:   main.elf
   avr-objdump -d main.elf

cpp:
   $(COMPILE) -E main.c

OBJECTS    = main.o uart.o

#ifndef USART_H
#define USART_H

#include <stdint.h>
#include <avr/io.h>

uint8_t uart_putchar (char data);
uint8_t uart_getchar (void);
void uart_putstring(char *s);

#endif

#include "uart.h"

uint8_t uart_putchar (char data)
{
   while ( !( UCSRA & (1<<UDRE)) ); // Wait for empty transmit buffer           
   UDR = data;  // Putting data into the buffer, forces transmission                               
   return 0;
}

uint8_t uart_getchar (void)
{
   while ( !(UCSRA & (1<<RXC)) );  // Wait for data to be received           
   return (UDR);        // Return Data                         
}

void uart_putstring(char *s)
{
   while(*s) uart_putchar(*s++);
   
}

#include <stdio.h>
#include <string.h>
#include <stdint.h>
#include <avr/io.h>
#include <avr/interrupt.h>
#include <util/delay.h>
#include "uart.h"