rt-thread-official/components/utilities/zmodem/zdevice.c

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/*
* File : zdevice.c
* the implemention of zmodem protocol.
* Change Logs:
* Date Author Notes
* 2011-03-29 itspy
*/
#include <rtthread.h>
#include <finsh.h>
#include <shell.h>
#include <rtdef.h>
#include <dfs.h>
#include <dfs_file.h>
#include <dfs_posix.h>
#include "zdef.h"
rt_uint32_t Line_left = 0; /* left number of data in the read line buffer*/
rt_uint32_t Left_sizes = 0; /* left file sizes */
rt_uint32_t Baudrate = BITRATE; /* console baudrate */
rt_uint32_t get_device_baud(void)
{
return(Baudrate);
}
rt_uint32_t get_sys_time(void)
{
return(0L);
}
void zsend_byte(rt_uint16_t ch)
{
rt_device_write(zmodem.device, 0, &ch,1);
return;
}
void zsend_line(rt_uint16_t c)
{
rt_uint16_t ch;
ch = (c & 0377);
rt_device_write(zmodem.device, 0, &ch, 1);
return;
}
rt_int16_t zread_line(rt_uint16_t timeout)
{
char *str;
static char buf[10];
if (Line_left > 0)
{
Line_left -= 1;
return (*str++ & 0377);
}
Line_left = 0;
timeout/=5;
while (1)
{
Line_left = rt_device_read(shell->device, 0, buf, 1);
if (Line_left)
{
Line_left = Line_left;
str = buf;
break;
}
}
if (Line_left < 1) return TIMEOUT;
Line_left -=1;
return (*str++ & 0377);
}
/*
* send a string to the modem, processing for \336 (sleep 1 sec)
* and \335 (break signal)
*/
void zsend_break(char *cmd)
{
while (*cmd++)
{
switch (*cmd)
{
case '\336':
continue;
case '\335':
rt_thread_delay(RT_TICK_PER_SECOND);
continue;
default:
zsend_line(*cmd);
break;
}
}
}
/* send cancel string to get the other end to shut up */
void zsend_can(void)
{
static char cmd[] = {24,24,24,24,24,24,24,24,24,24,0};
zsend_break(cmd);
rt_kprintf("\x0d");
Line_left=0; /* clear Line_left */
return;
}
/* end of zdevice.c */