// Copyright 2006 Yamane Akira
// Test Soft-Uart : See Atmel Applicaton Note 305
// File: soft_testm8.c
// Target : m8
// Crystal: 4.0 Mhz
// Date 07/12/05
// Written/adapted by Dipl.Ing.J.Zastrow
// for Imagecraft ICCAVR Ver. 6.28c
// Modified by A.Yamane
// Usage : if you need more then one UART
// Tested with STK500 (Atmel)
// Customer settings : SEE soft_uartm8.s

#include <iom8v.h>
#include <macros.h>

//function prototypes for soft_uart.s
//one byte return value in R16 !!!
extern unsigned char getit(void);
//one byte argument in R16 
extern putit(register unsigned char key);
//initialise TxD,RxD port pins
extern void init_soft_uart(void);


void port_init(void)
{
 //default settings all inputs and pull up 
 PORTB = 0x00;
 DDRB  = 0xFF;
 PORTC = 0xFF;
 DDRC  = 0x00;
 PORTD = 0xFF;
 DDRD  = 0x00;
}

//call this routine to initialise all peripherals
void init_devices(void)
{
 //stop errant interrupts until set up
 CLI(); //disable all interrupts
 port_init();
 MCUCR = 0x00;
 GICR = 0x00;
 TIMSK = 0x00;
 SEI(); //re-enable interrupts
 //all peripherals are now initialised
}

//Simply connect RS232 SPARE to
//PC2 to receive and PC3 to transmitt
 
void main(void)
{
 unsigned char s;
 //default
 init_devices();
 
 //do custom settings in soft_uart.s !!!
 init_soft_uart();
  
 while(1){
 putit('T'); //T
 putit('E'); //E
 putit('S'); //S
 putit('T'); //T
 putit(':'); //:
 s = getit();
 putit(s);
 putit(0x0D);//CR
 putit(0x0A);//LF
 }//end while
 
}//end main