diff options
Diffstat (limited to 'apps/netutils/pppd/ahdlc.c')
| -rw-r--r-- | apps/netutils/pppd/ahdlc.c | 62 |
1 files changed, 32 insertions, 30 deletions
diff --git a/apps/netutils/pppd/ahdlc.c b/apps/netutils/pppd/ahdlc.c index 29287f89d..de593a8bb 100644 --- a/apps/netutils/pppd/ahdlc.c +++ b/apps/netutils/pppd/ahdlc.c @@ -57,9 +57,7 @@ # undef PACKET_TX_DEBUG #endif -/*--------------------------------------------------------------------------- - * ahdlc flags bit defins, for ahdlc_flags variable - ---------------------------------------------------------------------------*/ +/* ahdlc flags bit defins, for ahdlc_flags variable */ /* Escaped mode bit */ @@ -77,8 +75,9 @@ * Private Functions ****************************************************************************/ -/*---------------------------------------------------------------------------*/ -/* Simple and fast CRC16 routine for embedded processors. +/**************************************************************************** + * Simple and fast CRC16 routine for embedded processors. + * * Just slightly slower than the table lookup method but consumes * almost no space. Much faster and smaller than the loop and * shift method that is widely used in the embedded space. @@ -87,8 +86,8 @@ * data = (crcvalue ^ inputchar) & 0xff; * data = (data ^ (data << 4)) & 0xff; * crc = (crc >> 8) ^ ((data << 8) ^ (data <<3) ^ (data >> 4)) - */ -/*---------------------------------------------------------------------------*/ + * + ****************************************************************************/ static u16_t crcadd(u16_t crcvalue, u8_t c) { @@ -101,11 +100,15 @@ static u16_t crcadd(u16_t crcvalue, u8_t c) return ((crcvalue >> 8) ^ b); } -/*---------------------------------------------------------------------------*/ -/* ahdlc_init(buffer, buffersize) - this initializes the ahdlc engine to +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * ahdlc_init(buffer, buffersize) - this initializes the ahdlc engine to * allow for rx frames. - */ -/*---------------------------------------------------------------------------*/ + * + ****************************************************************************/ void ahdlc_init(struct ppp_context_s *ctx) { @@ -118,11 +121,11 @@ void ahdlc_init(struct ppp_context_s *ctx) #endif } -/*---------------------------------------------------------------------------*/ -/* ahdlc_rx_ready() - resets the ahdlc engine to the beginning of frame +/**************************************************************************** + * ahdlc_rx_ready() - resets the ahdlc engine to the beginning of frame * state. - */ -/*---------------------------------------------------------------------------*/ + * + ****************************************************************************/ void ahdlc_rx_ready(struct ppp_context_s *ctx) { @@ -131,15 +134,15 @@ void ahdlc_rx_ready(struct ppp_context_s *ctx) ctx->ahdlc_flags |= AHDLC_RX_READY; } -/*---------------------------------------------------------------------------*/ -/* ahdlc receive function - This routine processes incoming bytes and tries +/**************************************************************************** + * ahdlc receive function - This routine processes incoming bytes and tries * to build a PPP frame. * * Two possible reasons that ahdlc_rx will not process characters: * o Buffer is locked - in this case ahdlc_rx returns 1, char * sending routing should retry. - */ -/*---------------------------------------------------------------------------*/ + * + ****************************************************************************/ u8_t ahdlc_rx(struct ppp_context_s *ctx, u8_t c) { @@ -299,14 +302,14 @@ u8_t ahdlc_rx(struct ppp_context_s *ctx, u8_t c) return 0; } -/*---------------------------------------------------------------------------*/ -/* ahdlc_tx_char(char) - write a character to the serial device, +/**************************************************************************** + * ahdlc_tx_char(char) - write a character to the serial device, * escape if necessary. * - * Relies on local global vars : ahdlc_tx_crc, ahdlc_flags. + * Relies on local global vars : ahdlc_tx_crc, ahdlc_flags. * Modifies local global vars : ahdlc_tx_crc. - */ -/*---------------------------------------------------------------------------*/ + * + ****************************************************************************/ void ahdlc_tx_char(struct ppp_context_s *ctx, u16_t protocol, u8_t c) { @@ -332,15 +335,16 @@ void ahdlc_tx_char(struct ppp_context_s *ctx, u16_t protocol, u8_t c) ppp_arch_putchar(ctx, c); } -/*---------------------------------------------------------------------------*/ -/* ahdlc_tx(protocol,buffer,len) - Transmit a PPP frame. +/**************************************************************************** + * ahdlc_tx(protocol,buffer,len) - Transmit a PPP frame. + * * Buffer contains protocol data, ahdlc_tx addes address, control and * protocol data. * * Relies on local global vars : ahdlc_tx_crc, ahdlc_flags. * Modifies local global vars : ahdlc_tx_crc. - */ -/*---------------------------------------------------------------------------*/ + * + ****************************************************************************/ u8_t ahdlc_tx(struct ppp_context_s *ctx, u16_t protocol, u8_t *header, u8_t *buffer, u16_t headerlen, u16_t datalen) @@ -443,5 +447,3 @@ u8_t ahdlc_tx(struct ppp_context_s *ctx, u16_t protocol, u8_t *header, O return 0; } - -/*---------------------------------------------------------------------------*/ |