void shellPrompt()
{
while(1)
{
char order[ORDER_LEN];
printf("myshell$");//提示符
scanf("%s", order);
if (strcmp(order, "doit") == 0)
{
commandExecute();
}
else
{
if (strcmp(order, "exit") == 0)
{
return;
}
else
{
continue;
}
}
}
}
static void commandCharIn(unsigned char ch) {
switch (commandData.state) {
case COMMAND_WAIT_SYNC1:
if (ch == COMMAND_SYNC1)
commandData.state = COMMAND_WAIT_SYNC2;
break;
case COMMAND_WAIT_SYNC2:
if (ch == COMMAND_SYNC2)
commandData.state = COMMAND_WAIT_SYNC3;
else
commandData.state = COMMAND_WAIT_SYNC1;
break;
case COMMAND_WAIT_SYNC3:
if (ch == COMMAND_COMMAND) {
commandData.checkA = commandData.checkB = 0;
commandData.state = COMMAND_WAIT_RQID1;
}
else if (ch == COMMAND_FLOAT_DUMP) {
commandData.buf.commandId = COMMAND_ACC_IN;
commandData.bufPoint = 1;
commandData.checkA = commandData.checkB = 0;
commandData.state = COMMAND_WAIT_ROWS;
}
else
commandData.state = COMMAND_WAIT_SYNC1;
break;
case COMMAND_WAIT_RQID1:
commandChecksum(ch);
commandData.requestId[0] = ch;
commandData.state = COMMAND_WAIT_RQID2;
break;
case COMMAND_WAIT_RQID2:
commandChecksum(ch);
commandData.requestId[1] = ch;
commandData.state = COMMAND_WAIT_RQID3;
break;
case COMMAND_WAIT_RQID3:
commandChecksum(ch);
commandData.requestId[2] = ch;
commandData.state = COMMAND_WAIT_RQID4;
break;
case COMMAND_WAIT_RQID4:
commandChecksum(ch);
commandData.requestId[3] = ch;
commandData.state = COMMAND_WAIT_LEN;
break;
case COMMAND_WAIT_LEN:
commandChecksum(ch);
commandData.len = ch;
commandData.bufPoint = 0;
commandData.state = COMMAND_PAYLOAD;
break;
case COMMAND_WAIT_ROWS:
commandChecksum(ch);
*((char *)&commandData.buf + commandData.bufPoint++) = ch;
commandData.len = ch;
commandData.state = COMMAND_WAIT_FLOATS;
break;
case COMMAND_WAIT_FLOATS:
commandChecksum(ch);
*((char *)&commandData.buf + commandData.bufPoint++) = ch;
commandData.len = commandData.bufPoint + commandData.len * ch * sizeof(float);
commandData.state = COMMAND_PAYLOAD;
break;
case COMMAND_PAYLOAD:
commandChecksum(ch);
*((char *)&commandData.buf + commandData.bufPoint++) = ch;
if (commandData.bufPoint == commandData.len)
commandData.state = COMMAND_CHECK1;
break;
case COMMAND_CHECK1:
if (ch == commandData.checkA) {
commandData.state = COMMAND_CHECK2;
}
else {
commandData.state = COMMAND_WAIT_SYNC1;
commandData.checksumErrors++;
}
break;
case COMMAND_CHECK2:
commandData.state = COMMAND_WAIT_SYNC1;
if (ch == commandData.checkB)
commandExecute(&commandData.buf);
else
commandData.checksumErrors++;
break;
}
}