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