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////////////////////////////////////////////////////////////////////////////////
/*! @file CommandParser.c MSDN command parser.
- Part of the MSDN firmware.
- Part of the Research Assistant project.
- Copyright(C) 2016, Viktor E. Bursian, St.Petersburg, Russia.
Viktor.Bursian@mail.ioffe.ru
*///////////////////////////////////////////////////////////////////////////////
#include "CommandParser.h"
#include "Microsin_USB_IO.h"
#include "zakavych.h"
const char * const DeviceName = ZAKAVYCH(MSDN_SHORTNAME);
const char * const BuildDate = __DATE__;
void ProcessReceivedByte (const int16_t received_byte)
{
static uint8_t ParserStage = 0;
//!< Parser stages:
//!< - 0 - command char expected;
//!< - 1 to 8 - argument digit or [CR]LF expected;
//!< - 9 - got command and 8 digits,
//!< [CR]LF expected;
//!< - 0xD0 - got command and CR, LF expected;
//!< - 0xDn - got command, n digits and CR,
//!< LF expected;
//!< - 0xEn - got command, n digits and [CR]LF,
//!< to be executed;
//!< - 0xF0 - sintax error encounted, LF expected.
//!< - 0xFF - sintax error encounted, got LF,
//!< now, error to be reported.
static char Command = ' ';
static uint8_t Argument8 = 0;
static uint16_t Argument16 = 0;
static uint32_t Argument32 = 0;
int8_t ErrNo;
switch( ParserStage ){
case 0:
if( (0x21 <= received_byte) && (received_byte <= 0x7F) ){
Command = received_byte;
Argument8 = 0;
ParserStage = 1;
}else if( received_byte == 0x0A ){
ParserStage = 0xFF;
}else{
ParserStage = 0xF0;
}
break;
case 1:
case 2:
if( received_byte == 0x0D ){
ParserStage += 0xCF; // -1 + 0xD0
}else if( received_byte == 0x0A ){
ParserStage += 0xDF; // -1 + 0xE0
}else{
ParserStage++;
if ((received_byte >= 0x41) && (received_byte <= 0x46) ){
Argument8 = (Argument8 << 4) + (received_byte - 0x40 + 0x09);
}else if( (received_byte >= 0x61) && (received_byte <= 0x66) ){
Argument8 = (Argument8 << 4) + (received_byte - 0x60 + 0x09);
}else if( (received_byte >= 0x30) && (received_byte <= 0x39) ){
Argument8 = (Argument8 << 4) + (received_byte - 0x30);
}else{
ParserStage = 0xF0;
}
}
break;
case 3:
Argument16 = Argument8;
case 4:
if( received_byte == 0x0D ){
ParserStage += 0xCF; // -1 + 0xD0
}else if( received_byte == 0x0A ){
ParserStage += 0xDF; // -1 + 0xE0
}else{
ParserStage++;
if ((received_byte >= 0x41) && (received_byte <= 0x46) ){
Argument16 = (Argument16 << 4) + (received_byte - 0x40 + 0x09);
}else if( (received_byte >= 0x61) && (received_byte <= 0x66) ){
Argument16 = (Argument16 << 4) + (received_byte - 0x60 + 0x09);
}else if( (received_byte >= 0x30) && (received_byte <= 0x39) ){
Argument16 = (Argument16 << 4) + (received_byte - 0x30);
}else{
ParserStage = 0xF0;
}
}
break;
case 5:
Argument32 = Argument16;
case 6:
case 7:
case 8:
if( received_byte == 0x0D ){
ParserStage += 0xCF; // -1 + 0xD0
}else if( received_byte == 0x0A ){
ParserStage += 0xDF; // -1 + 0xE0
}else{
ParserStage++;
if ((received_byte >= 0x41) && (received_byte <= 0x46) ){
Argument32 = (Argument32 << 4) + (received_byte - 0x40 + 0x09);
}else if( (received_byte >= 0x61) && (received_byte <= 0x66) ){
Argument32 = (Argument32 << 4) + (received_byte - 0x60 + 0x09);
}else if( (received_byte >= 0x30) && (received_byte <= 0x39) ){
Argument32 = (Argument32 << 4) + (received_byte - 0x30);
}else{
ParserStage = 0xF0;
}
}
break;
case 9:
if( received_byte == 0x0D ){
ParserStage = 0xD8;
}else if( received_byte == 0x0A ){
ParserStage = 0xE8;
}else{
ParserStage = 0xF0;
}
break;
case 0xD0:
case 0xD1:
case 0xD2:
case 0xD3:
case 0xD4:
case 0xD5:
case 0xD6:
case 0xD7:
case 0xD8:
if( received_byte == 0x0A ){
ParserStage += 0x10;
}else{
ParserStage = 0xF0;
}
break;
case 0xF0:
if( received_byte == 0x0A ){
ParserStage = 0xFF;
}
break;
}
switch( ParserStage ){
case 0xE0:
if( Command == '?' ){
SendCharToUSB('@');
SendStringToUSB(DeviceName);
Send_EOL_ToUSB();
}else if( Command == ':' ){
SendCharToUSB(':');
SendStringToUSB(BuildDate);
Send_EOL_ToUSB();
}else if( (ErrNo = ExecuteCommand0(Command)) ){
SendCharToUSB('#');
SendCharToUSB(0x30+ErrNo);
Send_EOL_ToUSB();
}
ParserStage = 0;
break;
case 0xE1:
case 0xE2:
if( (ErrNo = ExecuteCommand2(Command,Argument8)) ){
SendCharToUSB('#');
SendCharToUSB(0x30+ErrNo);
Send_EOL_ToUSB();
}
ParserStage = 0;
break;
case 0xE3:
case 0xE4:
if( (ErrNo = ExecuteCommand4(Command,Argument16)) ){
SendCharToUSB('#');
SendCharToUSB(0x30+ErrNo);
Send_EOL_ToUSB();
}
ParserStage = 0;
break;
case 0xE5:
case 0xE6:
case 0xE7:
case 0xE8:
if( (ErrNo = ExecuteCommand8(Command,Argument32)) ){
SendCharToUSB('#');
SendCharToUSB(0x30+ErrNo);
Send_EOL_ToUSB();
}
ParserStage = 0;
break;
case 0xFF:
SendCharToUSB('#');
Send_EOL_ToUSB();
ParserStage = 0;
break;
}
}
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