/* receive file */
static rt_err_t zrec_file(rt_uint8_t *rxbuf, struct zfile *zf)
{
rt_err_t res = - RT_ERROR;
rt_uint16_t err_cnt = 0;
do {
zput_pos(zf->bytes_received);
zsend_hex_header(ZRPOS, tx_header);
again:
res = zget_header(rx_header);
switch (res) {
case ZDATA:
zget_pos(Rxpos);
if (Rxpos != zf->bytes_received) {
zsend_break(Attn);
continue;
}
err_cnt = 0;
res = zrec_file_data(rxbuf,zf);
if (res == -RT_ERROR) {
zsend_break(Attn);
continue;
} else if (res == GOTCAN) return res;
else goto again;
case ZRPOS:
zget_pos(Rxpos);
continue;
case ZEOF:
err_cnt = 0;
zget_pos(Rxpos);
if (Rxpos != zf->bytes_received || Rxpos != zf->bytes_total) {
continue;
}
return (zrec_init(rxbuf,zf)); /* resend ZRINIT packet,ready to receive next file */
case ZFIN:
zrec_ack_bibi();
return ZCOMPL;
case ZCAN:
#if 1==ZDEBUG
rt_kprintf("error code: sender cancelled \r\n");
#endif
zf->bytes_received = 0L; /* throw the received data */
return res;
case ZSKIP:
return res;
case -RT_ERROR:
zsend_break(Attn);
continue;
case ZNAK:
case TIMEOUT:
default:
continue;
}
} while(++err_cnt < 100);
return res;
}
/* 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;
}
/* receive file data,continously, no ack */
static rt_err_t zrec_file_data(rt_uint8_t *buf, struct zfile *zf)
{
rt_err_t res = -RT_ERROR;
more_data:
res = zget_data(buf,RX_BUFFER_SIZE);
switch(res)
{
case GOTCRCW: /* zack received */
zwrite_file(buf,Rxcount,zf);
zf->bytes_received += Rxcount;
zput_pos(zf->bytes_received);
zsend_line(XON);
zsend_hex_header(ZACK, tx_header);
return RT_EOK;
case GOTCRCQ:
zwrite_file(buf,Rxcount,zf);
zf->bytes_received += Rxcount;
zput_pos(zf->bytes_received);
zsend_hex_header(ZACK, tx_header);
goto more_data;
case GOTCRCG:
zwrite_file(buf,Rxcount,zf);
zf->bytes_received += Rxcount;
goto more_data;
case GOTCRCE:
zwrite_file(buf,Rxcount,zf);
zf->bytes_received += Rxcount;
return RT_EOK;
case GOTCAN:
#ifdef ZDEBUG
rt_kprintf("error code : ZCAN \r\n");
#endif
return res;
case TIMEOUT:
return res;
case -RT_ERROR:
zsend_break(Attn);
return res;
default:
return res;
}
}
