/* 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;
}
/* wait sync(ack) from the receiver */
static rt_err_t zget_sync(void)
{
rt_err_t res = -RT_ERROR;
for (;;)
{
res = zget_header(rx_header);
switch (res)
{
case ZCAN:
case ZABORT:
case ZFIN:
case TIMEOUT:
return -RT_ERROR;
case ZRPOS: /* get pos, need to resend */
zget_pos(Rxpos);
Txpos = Rxpos;
return res;
case ZACK:
return res;
case ZRINIT: /* get ZRINIT indicate that the prev file send completed */
return res;
case ZSKIP:
return res;
case -RT_ERROR:
default:
zsend_bin_header(ZNAK, tx_header);
continue;
}
}
}
/* send file name and related info */
static rt_err_t zsend_file(struct zfile *zf, rt_uint8_t *buf, rt_uint16_t len)
{
rt_uint8_t cnt;
rt_err_t res = -RT_ERROR;
for (cnt=0;cnt<5;cnt++)
{
tx_header[ZF0] = ZF0_CMD; /* file conversion option */
tx_header[ZF1] = ZF1_CMD; /* file management option */
tx_header[ZF2] = (ZF3_CMD|ZF2_OP); /* file transfer option */
tx_header[ZF3] = ZF3_CMD;
zsend_bin_header(ZFILE, tx_header);
zsend_bin_data(buf, len, ZCRCW);
loop:
res = zget_header(rx_header);
switch (res)
{
case ZRINIT:
while ((res = zread_line(50)) > 0)
{
if (res == ZPAD)
{
goto loop;
}
}
break;
case ZCAN:
case TIMEOUT:
case ZABORT:
case ZFIN:
break;
case -RT_ERROR:
case ZNAK:
break;
case ZCRC: /* no CRC request */
goto loop;
case ZFERR:
case ZSKIP:
break;
case ZRPOS: /* here we want */
zget_pos(Rxpos);
Txpos = Rxpos;
return(zsend_file_data(zf));
default:
break;
}
}
return res;
}
