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/* (c) 2001-2003 by Marcin Wiacek */
/* based on some work from MyGnokii (www.mwiacek.com) */
#include "../../gsmstate.h"
#ifdef GSM_ENABLE_MBUS2
#include <stdio.h>
#include <string.h>
#include "../../gsmcomon.h"
#include "mbus2.h"
static GSM_Error MBUS2_WriteMessage (GSM_StateMachine *s,
unsigned char *MsgBuffer,
int MsgLength,
unsigned char MsgType)
{
unsigned char *buffer2, checksum = 0;
GSM_Protocol_MBUS2Data *d = &s->Protocol.Data.MBUS2;
int i, sent, len;
GSM_DumpMessageLevel3(s, MsgBuffer, MsgLength, MsgType);
buffer2 = (unsigned char *)malloc(MsgLength + 8);
buffer2[0] = MBUS2_FRAME_ID;
buffer2[1] = MBUS2_DEVICE_PHONE; // destination
buffer2[2] = MBUS2_DEVICE_PC; // source
buffer2[3] = MsgType;
buffer2[4] = MsgLength / 256;
buffer2[5] = MsgLength % 256;
memcpy(buffer2 + 6, MsgBuffer, MsgLength);
len = 6 + MsgLength;
/* According to http://www.flosys.com/tdma/n5160.html some phones
* can have problems with checksum equal 0x1F. Phones can recognize
* received frame, but won't send ACK for it. When checksum is 0x1F,
* we increment the sequence number
*/
do {
d->MsgSequenceNumber++;
buffer2[len] = d->MsgSequenceNumber;
/* Calculating checksum */
checksum = 0;
for (i = 0; i < len + 1; i++) checksum ^= buffer2[i];
} while (checksum == 0x1f);
buffer2[len++] = d->MsgSequenceNumber;
buffer2[len++] = checksum;
GSM_DumpMessageLevel2(s, buffer2+6, MsgLength, MsgType);
/* Sending to phone */
my_sleep(10);
sent=s->Device.Functions->WriteDevice(s,buffer2,len);
free(buffer2);
if (sent!=len) return ERR_DEVICEWRITEERROR;
return ERR_NONE;
}
static GSM_Error MBUS2_SendAck(GSM_StateMachine *s,
unsigned char type,
unsigned char sequence)
{
GSM_Device_Functions *Device = s->Device.Functions;
unsigned char buffer2[6];
int i;
buffer2[0] = MBUS2_FRAME_ID;
buffer2[1] = MBUS2_DEVICE_PHONE; //destination
buffer2[2] = MBUS2_DEVICE_PC; //source
buffer2[3] = MBUS2_ACK_BYTE;
buffer2[4] = sequence;
buffer2[5] = 0;
/* Calculating checksum */
for (i = 0; i < 5; i++) buffer2[5] ^= buffer2[i];
if (s->di.dl==DL_TEXT || s->di.dl==DL_TEXTALL ||
s->di.dl==DL_TEXTDATE || s->di.dl==DL_TEXTALLDATE) {
smprintf(s,"[Sending Ack of type %02x, seq: %x]\n",type,sequence);
}
/* Sending to phone */
my_sleep(10);
if (Device->WriteDevice(s,buffer2,6)!=6) return ERR_DEVICEWRITEERROR;
return ERR_NONE;
}
static GSM_Error MBUS2_StateMachine(GSM_StateMachine *s, unsigned char rx_char)
{
GSM_Phone_Functions *Phone = s->Phone.Functions;
GSM_Protocol_MBUS2Data *d = &s->Protocol.Data.MBUS2;
d->Msg.CheckSum[0] = d->Msg.CheckSum[1];
d->Msg.CheckSum[1] ^= rx_char;
if (d->MsgRXState == RX_GetMessage) {
d->Msg.Buffer[d->Msg.Count] = rx_char;
d->Msg.Count++;
/* This is not last byte in frame */
if (d->Msg.Count != d->Msg.Length+2) return ERR_NONE;
/* Checksum is incorrect */
if (d->Msg.CheckSum[0] != rx_char) {
if (s->di.dl==DL_TEXT || s->di.dl==DL_TEXTALL || s->di.dl==DL_TEXTERROR ||
s->di.dl==DL_TEXTDATE || s->di.dl==DL_TEXTALLDATE || s->di.dl==DL_TEXTERRORDATE) {
smprintf(s,"[ERROR: checksum]\n");
}
d->MsgRXState = RX_Sync;
return ERR_NONE;
}
if (d->Msg.Destination != MBUS2_DEVICE_PHONE) {
MBUS2_SendAck(s, d->Msg.Type, d->Msg.Buffer[d->Msg.Count-2]);
s->Phone.Data.RequestMsg = &d->Msg;
s->Phone.Data.DispatchError = Phone->DispatchMessage(s);
}
d->MsgRXState = RX_Sync;
return ERR_NONE;
}
if (d->MsgRXState == RX_GetLength2) {
if (d->Msg.Type == MBUS2_ACK_BYTE) {
if (s->di.dl==DL_TEXT || s->di.dl==DL_TEXTALL ||
s->di.dl==DL_TEXTDATE || s->di.dl==DL_TEXTALLDATE) {
smprintf(s,"[Received Ack]\n");
}
d->MsgRXState = RX_Sync;
return ERR_NONE;
}
d->Msg.Length = d->Msg.Length + rx_char;
if (d->Msg.BufferUsed < d->Msg.Length+2) {
d->Msg.BufferUsed = d->Msg.Length+2;
d->Msg.Buffer = (unsigned char *)realloc(d->Msg.Buffer,d->Msg.BufferUsed);
}
d->MsgRXState = RX_GetMessage;
return ERR_NONE;
}
if (d->MsgRXState == RX_GetLength1) {
d->Msg.Length = rx_char * 256;
d->MsgRXState = RX_GetLength2;
return ERR_NONE;
}
if (d->MsgRXState == RX_GetType) {
d->Msg.Type = rx_char;
d->MsgRXState = RX_GetLength1;
return ERR_NONE;
}
if (d->MsgRXState == RX_GetSource) {
if (rx_char != MBUS2_DEVICE_PHONE && rx_char != MBUS2_DEVICE_PC) {
if (s->di.dl==DL_TEXT || s->di.dl==DL_TEXTALL || s->di.dl==DL_TEXTERROR ||
s->di.dl==DL_TEXTDATE || s->di.dl==DL_TEXTALLDATE || s->di.dl==DL_TEXTERRORDATE) {
smprintf(s,"[ERROR: incorrect char - %02x, not %02x and %02x]\n", rx_char, MBUS2_DEVICE_PHONE, MBUS2_DEVICE_PC);
}
d->MsgRXState = RX_Sync;
return ERR_NONE;
}
d->Msg.Source = rx_char;
d->MsgRXState = RX_GetType;
return ERR_NONE;
}
if (d->MsgRXState == RX_GetDestination) {
if (rx_char != MBUS2_DEVICE_PC && rx_char != MBUS2_DEVICE_PHONE) {
if (s->di.dl==DL_TEXT || s->di.dl==DL_TEXTALL || s->di.dl==DL_TEXTERROR ||
s->di.dl==DL_TEXTDATE || s->di.dl==DL_TEXTALLDATE || s->di.dl==DL_TEXTERRORDATE) {
smprintf(s,"[ERROR: incorrect char - %02x, not %02x and %02x]\n", rx_char, MBUS2_DEVICE_PHONE, MBUS2_DEVICE_PC);
}
d->MsgRXState = RX_Sync;
return ERR_NONE;
}
d->Msg.Destination = rx_char;
d->MsgRXState = RX_GetSource;
return ERR_NONE;
}
if (d->MsgRXState == RX_Sync) {
if (rx_char != MBUS2_FRAME_ID) {
if (s->di.dl==DL_TEXT || s->di.dl==DL_TEXTALL || s->di.dl==DL_TEXTERROR ||
s->di.dl==DL_TEXTDATE || s->di.dl==DL_TEXTALLDATE || s->di.dl==DL_TEXTERRORDATE) {
smprintf(s,"[ERROR: incorrect char - %02x, not %02x]\n", rx_char, MBUS2_FRAME_ID);
}
return ERR_NONE;
}
d->Msg.CheckSum[1] = MBUS2_FRAME_ID;
d->Msg.Count = 0;
d->MsgRXState = RX_GetDestination;
return ERR_NONE;
}
return ERR_NONE;
}
static GSM_Error MBUS2_Initialise(GSM_StateMachine *s)
{
GSM_Device_Functions *Device = s->Device.Functions;
GSM_Protocol_MBUS2Data *d = &s->Protocol.Data.MBUS2;
GSM_Error error;
d->Msg.Length = 0;
d->Msg.BufferUsed = 0;
d->Msg.Buffer = NULL;
d->MsgSequenceNumber = 0;
d->MsgRXState = RX_Sync;
error=Device->DeviceSetSpeed(s,9600);
if (error!=ERR_NONE) return error;
error=Device->DeviceSetParity(s,true);
if (error!=ERR_NONE) return error;
error=Device->DeviceSetDtrRts(s,false,true); /*DTR low,RTS high*/
if (error!=ERR_NONE) return error;
my_sleep(200);
return ERR_NONE;
}
static GSM_Error MBUS2_Terminate(GSM_StateMachine *s)
{
free(s->Protocol.Data.MBUS2.Msg.Buffer);
return ERR_NONE;
}
GSM_Protocol_Functions MBUS2Protocol = {
MBUS2_WriteMessage,
MBUS2_StateMachine,
MBUS2_Initialise,
MBUS2_Terminate
};
#endif
/* How should editor hadle tabs in this file? Add editor commands here.
* vim: noexpandtab sw=8 ts=8 sts=8:
*/
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