RasPi-ExtBoard

main.c

#include <avr/io.h>
#include <avr/interrupt.h>
#include <avr/pgmspace.h>
#include <string.h>
#include "uart.h"

#define UART_BAUD_RATE 9600
#define CMD_BUFFER_LEN 32
#define PROMPT "Raspi-ExtBoard> "

void main_loop(void);
void wait_for_cmd(char*);
void exec_cmd(char*);

int main(void)
{
  uart_init(UART_BAUD_SELECT(UART_BAUD_RATE, F_CPU)); 
  sei();

  main_loop();

  return 0;
}

inline void main_loop()
{
  char buf[CMD_BUFFER_LEN];
  for(;;)
  {
    wait_for_cmd(buf);
    exec_cmd(buf);
  }
}

inline void wait_for_cmd(char* buf)
{
  uint16_t c;
  uint8_t buf_idx;

  buf[0] = '\0';
  buf_idx = 0;
  uart_puts_P(PROMPT);

  for(;;)
  {
    c = uart_getc();
    if(c & UART_NO_DATA){ continue; }

    if( c == '\n' || c == '\r' )
    {
      uart_puts_P("\r\n");
      if( buf_idx > 0 )
      {
        buf[buf_idx] = '\0';
        return;
      }
      else
      {
        uart_puts_P(PROMPT);
      }
    }
    else if( c == '\b' || c == '\x7f')
    {
      if(buf_idx > 0)
      {
        buf[buf_idx] = '\0';
        buf_idx--;
        uart_puts_P("\b \b");
      }
      else
      {
        uart_putc('\a');
      }

    }
    else if( 32 <= c && c <=126 )
    {
      if(buf_idx < CMD_BUFFER_LEN-1)
      {
        uart_putc((char)c);
        buf[buf_idx] = (char)c;
        buf_idx++;
      }
      else
      {
        uart_putc('\a');
      }
    }
  }
}

inline void exec_cmd(char* str)
{
  /* いまからここ書く！！！！ */
}