/* Function:
bool SYS_CMD_Tasks( void )
Summary:
Maintains the Command Processor System Service's internal state machine.
Description:
This function is used to maintain the Command Processor System Service
internal state machine.
Precondition:
SYS_CMD_Initialize was successfully run once.
Parameters:
None.
Returns:
If successfully, returns true.
If there is an error, returns false.
Remarks:
None.
*/
bool SYS_CMD_Tasks(void)
{
short i;
SYS_CMD_DEVICE_NODE* pCmdIO;
for (i=0; i<cmdIODevList.num; i++)
{
pCmdIO = SYS_CMDIO_GET_HANDLE(i);
if(pCmdIO)
{
//Check if this command IO is ready
if(!(*pCmdIO->pCmdApi->isRdy)(pCmdIO) &&
pCmdIO->cmdIoType != SYS_CMD_TELNET_COMMAND_READ_CONSOLE_IO_PARAM)
{
continue;
}
switch(pCmdIO->cmdState)
{
case SYS_CMD_STATE_DISABLE:
//App layer is not ready to process commands yet
break;
case SYS_CMD_STATE_SETUP_READ:
{
readBuff[0] = '\0';
if ( pCmdIO->cmdIoType != SYS_CMD_TELNET_COMMAND_READ_CONSOLE_IO_PARAM)
{
_cmdAppData.bytesRead = (*pCmdIO->pCmdApi->readc)(pCmdIO); /* Read data from console. */
_cmdAppData.seqBuff[0] = '\0';
if (pCmdIO->cmdIoParam == NULL || *(uint8_t*)pCmdIO->cmdIoParam == SYS_CMD_SINGLE_CHARACTER_READ_CONSOLE_IO_PARAM)
{
pCmdIO->cmdState = SYS_CMD_STATE_WAIT_FOR_READ_DONE;
}
else if (*(uint8_t*)pCmdIO->cmdIoParam == SYS_CMD_FULL_COMMAND_READ_CONSOLE_IO_PARAM)
{
pCmdIO->cmdState = SYS_CMD_STATE_PROCESS_FULL_READ;
}
}
else /* cmdIoParm is an I/O Socket, such as telnet */
{
readBuff[0] = (*pCmdIO->pCmdApi->getc)(pCmdIO->cmdIoParam); /* Read data from console. */
pCmdIO->cmdState = SYS_CMD_STATE_WAIT_FOR_READ_DONE;
}
}
break;
case SYS_CMD_STATE_WAIT_FOR_READ_DONE:
{
if((readBuff[0] == '\r') || (readBuff[0] == '\n'))
{
pCmdIO->cmdState = SYS_CMD_STATE_SETUP_READ;
// new command assembled
if(pCmdIO->cmdPnt == pCmdIO->cmdBuff)
{ // just an extra \n or \r
(*pCmdIO->pCmdApi->msg)(pCmdIO->cmdIoParam, LINE_TERM _promptStr);
return true;
}
(*pCmdIO->pCmdApi->msg)(pCmdIO->cmdIoParam, LINE_TERM);
*pCmdIO->cmdPnt = 0;
pCmdIO->cmdPnt = pCmdIO->cmdEnd = pCmdIO->cmdBuff;
if(!ParseCmdBuffer(pCmdIO))
{
//Command not processed, show prompt
(*pCmdIO->pCmdApi->msg)(pCmdIO->cmdIoParam, _promptStr);
}
else
{
//Command being processed, temporarily disable prompt until command completes
pCmdIO->cmdState = SYS_CMD_STATE_DISABLE;
}
return true;
}
else if(readBuff[0] == '\b')
{
pCmdIO->cmdState = SYS_CMD_STATE_SETUP_READ;
if(pCmdIO->cmdPnt > pCmdIO->cmdBuff)
{
(*pCmdIO->pCmdApi->msg)(pCmdIO->cmdIoParam, "\b \b");
pCmdIO->cmdPnt--; pCmdIO->cmdEnd--;
}
}
else if(readBuff[0] == 0x1b)
{
_cmdAppData.seqBuff[0] = readBuff[1];
_cmdAppData.seqBuff[1] = readBuff[2];
// This is an escape sequence, start reading which cursor character
ProcessEscSequence(pCmdIO);
readBuff[0] = '\0';
readBuff[1] = '\0';
readBuff[2] = '\0';
pCmdIO->cmdState = SYS_CMD_STATE_SETUP_READ;
}
else if(pCmdIO->cmdEnd-pCmdIO->cmdBuff<SYS_CMD_MAX_LENGTH)
{
pCmdIO->cmdState = SYS_CMD_STATE_SETUP_READ;
if (readBuff[0]!='\0')
{
(*pCmdIO->pCmdApi->msg)(pCmdIO->cmdIoParam, readBuff);
*pCmdIO->cmdPnt++ = readBuff[0];
}
if(pCmdIO->cmdPnt > pCmdIO->cmdEnd)
{
pCmdIO->cmdEnd = pCmdIO->cmdPnt;
}
}
else
{
pCmdIO->cmdState = SYS_CMD_STATE_SETUP_READ;
(*pCmdIO->pCmdApi->msg)(pCmdIO->cmdIoParam, " *** Command Processor buffer exceeded. Retry. ***" LINE_TERM);
pCmdIO->cmdPnt = pCmdIO->cmdEnd = pCmdIO->cmdBuff;
(*pCmdIO->pCmdApi->msg)(pCmdIO->cmdIoParam, _promptStr);
}
}
break;
case SYS_CMD_STATE_PROCESS_FULL_READ:
{
if (readBuff[0]!='\0')
{
readBuff[strlen(readBuff)-1] = '\0';
strcpy(pCmdIO->cmdBuff, readBuff);
ParseCmdBuffer(pCmdIO);
pCmdIO->cmdState = SYS_CMD_STATE_SETUP_READ;
return true;
}
}
break;
}
}
}
return true;
}
// processing command received by the serial line
bool _SYS_COMMAND_TASK(void)
{
short i;
char data;
_CMDIO_DEV_NODE* pCmdIO;
const void* cmdIoParam;
if (_cmdAlive == false)
{
return false;
}
for (i=0; i<cmdIODevList.num; i++)
{
pCmdIO = _SYS_CMDIO_GET_HANDLE(i);
//DisplayPrompt();
if(pCmdIO)
{
cmdIoParam = pCmdIO->cmdIoParam;
if((*pCmdIO->pCmdApi->isRdy)(cmdIoParam))
{ // some data available
data = (*pCmdIO->pCmdApi->getc)(cmdIoParam); /* Read data from console. */
if((data == '\r') || (data == '\n'))
{
// new command assembled
if(pCmdIO->cmdPnt == pCmdIO->cmdBuff)
{ // just an extra \n or \r
(*pCmdIO->pCmdApi->msg)(cmdIoParam, LINE_TERM _promptStr);
return true;
}
(*pCmdIO->pCmdApi->msg)(cmdIoParam, LINE_TERM);
*pCmdIO->cmdPnt = 0;
pCmdIO->cmdPnt = pCmdIO->cmdEnd = pCmdIO->cmdBuff;
ParseCmdBuffer(pCmdIO);
(*pCmdIO->pCmdApi->msg)(cmdIoParam, _promptStr);
return true;
}
else if(data == '\b')
{
if(pCmdIO->cmdPnt > pCmdIO->cmdBuff)
{
(*pCmdIO->pCmdApi->msg)(cmdIoParam, "\b \b");
pCmdIO->cmdPnt--; pCmdIO->cmdEnd--;
}
}
else if(data == 0x1b)
{ // escape sequence
ProcessEscSequence(pCmdIO);
}
else if(pCmdIO->cmdEnd-pCmdIO->cmdBuff<_SYS_CMD_MAX_LENGTH)
{
(*pCmdIO->pCmdApi->putc)(cmdIoParam, data);
*pCmdIO->cmdPnt++ = data;
if(pCmdIO->cmdPnt > pCmdIO->cmdEnd)
{
pCmdIO->cmdEnd = pCmdIO->cmdPnt;
}
}
else
{
(*pCmdIO->pCmdApi->msg)(cmdIoParam, " *** Command Processor buffer exceeded. Retry. ***" LINE_TERM);
pCmdIO->cmdPnt = pCmdIO->cmdEnd = pCmdIO->cmdBuff;
(*pCmdIO->pCmdApi->msg)(cmdIoParam, _promptStr);
}
}
}
}
return true;
}
