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Code Issues Releases Activity

gathdlc: Support transmit ACCM

This commit is contained in:
Denis Kenzior 2010-04-27 23:25:28 -05:00
parent e088f3c2bb
commit 7c6c72f558
2 changed files with 27 additions and 2 deletions
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26
gatchat/gathdlc.c
View File

@ -53,6 +53,7 @@ struct _GAtHDLC {
guint decode_offset;
guint16 decode_fcs;
gboolean decode_escape;
guint32 xmit_accm[8];
GAtReceiveFunc receive_func;
gpointer receive_data;
GAtDebugFunc debugf;
@ -176,6 +177,9 @@ GAtHDLC *g_at_hdlc_new(GIOChannel *channel)
hdlc->decode_escape = FALSE;
hdlc->max_read_attempts = 8;
hdlc->xmit_accm[0] = ~0U;
hdlc->xmit_accm[3] = 0x60000000; /* 0x7d, 0x7e */
hdlc->read_buffer = ring_buffer_new(BUFFER_SIZE);
if (!hdlc->read_buffer)
goto error;
@ -321,6 +325,24 @@ static void wakeup_write(GAtHDLC *hdlc)
can_write_data, hdlc, write_watch_destroy);
}
void g_at_hdlc_set_xmit_accm(GAtHDLC *hdlc, guint32 accm)
{
if (hdlc == NULL)
return;
hdlc->xmit_accm[0] = accm;
}
guint32 g_at_hdlc_get_xmit_accm(GAtHDLC *hdlc)
{
if (hdlc == NULL)
return 0;
return hdlc->xmit_accm[0];
}
#define NEED_ESCAPE(xmit_accm, c) xmit_accm[c >> 5] & (1 << (c & 0x1f))
gboolean g_at_hdlc_send(GAtHDLC *hdlc, const unsigned char *data, gsize size)
{
unsigned int avail = ring_buffer_avail(hdlc->write_buffer);
@ -342,7 +364,7 @@ gboolean g_at_hdlc_send(GAtHDLC *hdlc, const unsigned char *data, gsize size)
fcs = HDLC_FCS(fcs, data[i]);
*buf = data[i++] ^ HDLC_TRANS;
escape = FALSE;
} else if (data[i] == HDLC_FLAG || data[i] == HDLC_ESCAPE) {
} else if (NEED_ESCAPE(hdlc->xmit_accm, data[i])) {
*buf = HDLC_ESCAPE;
escape = TRUE;
} else {
@ -370,7 +392,7 @@ gboolean g_at_hdlc_send(GAtHDLC *hdlc, const unsigned char *data, gsize size)
if (escape == TRUE) {
*buf = tail[i++] ^ HDLC_TRANS;
escape = FALSE;
} else if (tail[i] == HDLC_FLAG || tail[i] == HDLC_ESCAPE) {
} else if (NEED_ESCAPE(hdlc->xmit_accm, tail[i])) {
*buf = HDLC_ESCAPE;
escape = TRUE;
} else {

3
gatchat/gathdlc.h
View File

@ -39,6 +39,9 @@ void g_at_hdlc_unref(GAtHDLC *hdlc);
void g_at_hdlc_set_debug(GAtHDLC *hdlc, GAtDebugFunc func, gpointer user_data);
void g_at_hdlc_set_xmit_accm(GAtHDLC *hdlc, guint32 accm);
guint32 g_at_hdlc_get_xmit_accm(GAtHDLC *hdlc);
void g_at_hdlc_set_receive(GAtHDLC *hdlc, GAtReceiveFunc func,
gpointer user_data);
gboolean g_at_hdlc_send(GAtHDLC *hdlc, const unsigned char *data, gsize size);