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srhoar
Joined: 17 Apr 2007
Posts: 3
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 Posted: Sat May 05, 2007 9:10 am |
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Here is the state machine and parser I use for most of my projects.
It is fairly simple to modify.
| Code: |
#include <string.h>
#include <stdlib.h>
typedef enum { FAULT = 0, STBY, ARMED, FIRE } State_Type;
const char state_text[4][6] = { "FAULT", "STBY", "ARMED", "FIRE" };
void state_table(void);
State_Type curr_state = FAULT;
char line[17]; /* variables for parser */
int i, c;
/* LIST ALL COMMAND TO RECOGNIZE HERE */
#define NUM_COMMANDS 10
#define EOL '\r'
const char commands[NUM_COMMANDS + 1][10] = {
"FIRE", "STBY", "STAT", "SHOTS",
"ARM", "PRF", "RED", "TEST",
"HELP","NOHV" };
/* function protoypes void */
void safe_system(void);
void state_stby(void);
void state_armed(void);
void state_fire(void);
void state_fault(void);
void debug_test(void);
void get_command(void);
void send_stat(void);
void delay_s(int);
void help(void);
int delay = 0; /* used for state delays */
/*
=======================================================================================================================
=======================================================================================================================
*/
void main()
{
/* CHIP SETUPS */
setup_adc_ports(NO_ANALOGS);
setup_adc(ADC_OFF);
setup_psp(PSP_DISABLED);
setup_spi(FALSE);
setup_timer_0(RTCC_INTERNAL | RTCC_DIV_1);
setup_timer_1(T1_DISABLED);
setup_timer_2(T2_DISABLED, 0, 1);
output_high(PIN_B6); /* prevent slave resets */
port_b_pullups(TRUE);
enable_interrupts(INT_RB);
enable_interrupts(GLOBAL);
safe_system();
while(1)
{
/* wait for command */
get_command();
printf("STATE=%d\n\r", curr_state);
state_table();
delay_ms(delay);
delay = 0;
}
}
/*
=======================================================================================================================
=======================================================================================================================
*/
void state_table()
{
switch(curr_state)
{
case FAULT: state_fault(); break;
case STBY: state_stby(); break;
case ARMED: state_armed(); break;
case FIRE: state_fire(); break;
}
}
/*
=======================================================================================================================
=======================================================================================================================
*/
void safe_system(void)
{
printf("SAFE ");
help();
}
/*
=======================================================================================================================
=======================================================================================================================
*/
void state_stby()
{
printf("STBY ");
}
/*
=======================================================================================================================
=======================================================================================================================
*/
void state_armed()
{
printf("ARMED ");
return;
}
/*
=======================================================================================================================
=======================================================================================================================
*/
void state_fire()
{
curr_state = ARMED;
return;
}
/*
=======================================================================================================================
=======================================================================================================================
*/
void state_fault()
{
printf("FAULT ");
}
/*
=======================================================================================================================
=======================================================================================================================
*/
void debug_test()
{
}
/*
=======================================================================================================================
=======================================================================================================================
*/
void get_command()
{
/*~~~~~~~~~~~~~~~~~~~*/
/* NEW PARSER */
char index, j;
char found = 0;
char command = 0;
char lookup_str[12];
char name[17];
char val[17];
/*~~~~~~~~~~~~~~~~~~~*/
/*
* printf("Parser\r\n");
*/
while(1)
{
state_table();
printf(">");
for(i = 0; i < 17; i++) line[i] = 0; /* clear the line buffer */
for(i = 0; i <= 16; i++)
{ /* get a whole line but limit it to buffer size */
if((c = getch()) == EOL) break;
line[i] = c; /* add the character to the line buffer */
} /* end for loop */
if(i < 3) continue; /* may be a blank line, just skip it, variables must be more than 3 */
line[i] = '\0';
for(i = 0; (line[i] != ' ') && (i < 10) && (line[i] != '\0'); i++)
{
name[i] = line[i]; /* extract the first word up to a space character */
}
name[i] = '\0'; /* terminate the string! */
if(line[i] != '\0')
{
i++; /* skip the space character */
j = 0;
for(; (i < 10) && (line[i] != '\0'); i++)
{
val[j++] = line[i]; /* now extract the rest of the line, the "value" */
}
val[j] = '\0';
}
/* LOOK UP COMMAND */
found = 0; /* set to not found to start */
command = 0;
for(index = 0; index < NUM_COMMANDS; index++)
{
sprintf(lookup_str, "%s", commands[index]);
if(strcmp(name, lookup_str) == 0)
{
found = 1; /* COMMAND IS IN TABLE */
command = index;
}
}
if(found == 1) /* COMMAND IS VALID */
{
printf("OK\r\n");
switch(command)
{
case 0: /* FIRE */if(curr_state == ARMED) curr_state = FIRE; break;
case 1: /* STBY */curr_state = STBY; break;
case 2: /* STAT */send_stat(); break;
case 3: /* SHOTS X */shots = atol(val); break;
case 4: /* ARM */if(curr_state == STBY) curr_state = ARMED; break;
case 5: /* PRF */prf = atol(val); break;
case 6: /* RED */red(); break;
case 7: /* TEST */debug_test(); break;
case 8: /* HELP */help(); break;
case 9: /* NOHV */nohv=1; break;
default: break;
}
}
else
printf("ERROR\r\n"); /* COMMAND NOT FOUND */
state_table();
}
}
/*
=======================================================================================================================
=======================================================================================================================
*/
void send_stat()
{
printf("\n\rSTAT\n\r");
}
/*
=======================================================================================================================
=======================================================================================================================
*/
void help()
{
printf("\nBlackjack controller V1.0\n\r");
printf("Commands:\n\r");
printf("STAT - Status of system\n\r");
printf("STBY - Put system in Standby\n\r");
printf("ARM - Arm the system and turn on the SSU\n\r");
printf("FIRE - Fire the system\n\r");
printf("SHOTS # - Set the number of shots to Fire\n\r");
printf("PRF # - Set the PRF of the System\n\r");
printf("\n\r");
printf("Written by Robert 'Red' Hoar for LMMFC - Dallas\n\r");
printf("\n\r");
}
|
_________________
===================
|Robert 'Red' Hoar
|
|Program Manager
|Directed Energy RF
=================== |
|
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MikeW
Joined: 15 Sep 2003
Posts: 184
Location: Warrington UK
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| Mark, can you help ? |
| Posted: Sat May 05, 2007 10:07 am |
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I do wish Mark would convert his code to CCS from microchip C.
I think his approach is very good, and would make the basis of a very flexible command line parser.
Unfortunately, I dont have the C skill to do it.
please Mark if V4.033 is now functional for pointer to rom etc, could you have a go
Mike |
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Steve H.
Guest
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| Posted: Tue May 08, 2007 3:05 pm |
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Future - While the parser presented is very, very good you might find a simpler one suitable for your needs. I designed a very simple one several years back. You can download it from the ARRL.org website at,
arrl.org/files/
search for PIC_DAS
It was written for PCM version 2.6XX but I think it should run under 4.XXX.
At any rate - it is a simpler - albeit not as functionally nice alternative, but it does work.
HTH - Steve H. |
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