uint8_t *buf = ctx->buf;
DECODE_CALL(buf, msg.dst.call);
- ASSERT(!(*buf & 0x01));
msg.dst.ssid = (*buf++ >> 1) & 0x0F;
DECODE_CALL(buf, msg.src.call);
ctx->hook(&msg);
}
+
+/**
+ * Check if there are any AX25 messages to be processed.
+ * This function read available characters from the medium and search for
+ * any AX25 messages.
+ * If a message is found it is decoded and the linked callback executed.
+ * This function may be blocking if there are no available chars and the KFile
+ * used in \a ctx to access the medium is configured in blocking mode.
+ *
+ * \param ctx AX25 context to operate on.
+ */
void ax25_poll(AX25Ctx *ctx)
{
int c;
ax25_putchar(ctx, ' ' << 1);
}
+/**
+ * Send an AX25 frame on the channel.
+ * \param ctx AX25 context to operate on.
+ * \param dst the destination callsign for the frame, \see AX25_CALL
+ * for a handy way to create a callsign on the fly.
+ * \param src the source callsign for the frame, \see AX25_CALL
+ * for a handy way to create a callsign on the fly.
+ * \param _buf payload buffer.
+ * \param len length of the payload.
+ */
void ax25_send(AX25Ctx *ctx, const AX25Call *dst, const AX25Call *src, const void *_buf, size_t len)
{
const uint8_t *buf = (const uint8_t *)_buf;
kfile_putc(HDLC_FLAG, ctx->ch);
}
+
+/**
+ * Init the AX25 protocol decoder.
+ *
+ * \param ctx AX25 context to init.
+ * \param channel Used to gain access to the physical medium
+ * \param hook Callback function called when a message is received
+ */
void ax25_init(AX25Ctx *ctx, KFile *channel, ax25_callback_t hook)
{
ASSERT(ctx);