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WIP: telemetrie

rtos
Olaf Rempel 12 years ago
parent
5d47c871fa
commit
1d216bc4c5
3 changed files with 325 additions and 2 deletions
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  1. +118
    -0
      include/telemetrie.h
  2. +7
    -2
      ldscript.ld
  3. +200
    -0
      src/telemetrie.c

+ 118
- 0
include/telemetrie.h View File

@@ -0,0 +1,118 @@
#ifndef TELEMETRIE_H_
#define TELEMETRIE_H_

/*
* 0: this is a request (host -> board)
* 1: this is a reply (board -> host)
*/
#define TDC_DIR 0x80
#define TDC_REPLY TDC_DIR

/*
* TDC_DIR = 0: destination address
* TDC_DIR = 1: source address
*/
#define TDC_ADDRMASK 0x70
#define TDC_ADDR0 0x00 // host (dynamic!, sends to interface of last hello)
#define TDC_ADDR1 0x10 // flightcontrol
#define TDC_ADDR2 0x20 // missioncontrol
#define TDC_ADDR3 0x30 // videocontrol
#define TDC_ADDR4 0x40
#define TDC_ADDR5 0x50
#define TDC_ADDR6 0x60
#define TDC_ADDR7 0x70

#define TDC_OPCODEMASK 0x0F
#define TDC_HELLO 0x00 // sets the path/interface to the host, reply is a info string
#define TDC_GETVARS 0x01 // request variable names, many replies
#define TDC_GETVALUE 0x02 // get one value, one reply
#define TDC_SETVALUE 0x03 // set one value, no reply
#define TDC_REQVALUES 0x04 // registers a periodic update, timed replies
#define TDC_TERMINAL 0x05 // stdout data

#define TDC_USERDATA 0x0F // user-defined data e.g. between boards

struct tdc_pkt_header {
uint8_t cmd; // TDC_*
uint8_t size; // bytes after size
} __attribute__ ((packed));

struct tdc_hello_reply {
uint8_t cmd;
uint8_t size;
char name[32]; // name of device, version string
} __attribute__ ((packed));

struct tdc_getvars_reply {
uint8_t cmd;
uint8_t size;
uint8_t id; // variable ID (max 256 vars / board)
uint32_t flags; // variable parameters (type, size, ro/rw)
uint8_t name[0]; // variable name, excluding '\0'
} __attribute__ ((packed));

struct tdc_getvalue_request {
uint8_t cmd;
uint8_t size;
uint8_t id; // variable ID (max 256 vars / board)
} __attribute__ ((packed));

struct tdc_getvalue_reply {
uint8_t cmd;
uint8_t size;
uint8_t id; // variable ID (max 256 vars / board)
uint8_t data[0]; // variable data 1-8 bytes
} __attribute__ ((packed));

struct tdc_setvalue_request {
uint8_t cmd;
uint8_t size;
uint8_t id; // variable ID (max 256 vars / board)
uint8_t data[0]; // variable data 1-8 bytes
} __attribute__ ((packed));

struct tdc_reqvalues_request {
uint8_t cmd;
uint8_t size;
uint16_t interval; // interval in ms
uint32_t varmap[8]; // bitmap of variables (32 * 8 = 256)
} __attribute__ ((packed));

struct tdc_reqvalues_reply {
uint8_t cmd;
uint8_t size;
uint32_t timestamp; // internal jiffie count
uint8_t cnt; // number of variables
} __attribute__ ((packed));


struct tdc_value {
const void *ptr;
const uint8_t *name;
uint32_t flags;
};

#define TDC_SIZEMASK 0x0F
#define TDC_UNSIGNED 0x00
#define TDC_SIGNED 0x10
#define TDC_FP 0x20

#define TDC_VALUE(var, desc, type, flags) \
type * tdc_check_##var(void) { return (&var); } \
static struct tdc_value __attribute__((used, section(".tdc_value"))) \
tdc_value_##var = { &var, desc, sizeof(type) | flags }; \
tdc_value_##var = tdc_value_##var;

#define TDC_UINT8(var, desc) TDC_VALUE(var, desc, uint8_t, TDC_UNSIGNED)
#define TDC_UINT16(var, desc) TDC_VALUE(var, desc, uint16_t, TDC_UNSIGNED)
#define TDC_UINT32(var, desc) TDC_VALUE(var, desc, uint32_t, TDC_UNSIGNED)
#define TDC_UINT64(var, desc) TDC_VALUE(var, desc, uint64_t, TDC_UNSIGNED)
#define TDC_INT8(var, desc) TDC_VALUE(var, desc, int8_t, TDC_SIGNED)
#define TDC_INT16(var, desc) TDC_VALUE(var, desc, int16_t, TDC_SIGNED)
#define TDC_INT32(var, desc) TDC_VALUE(var, desc, int32_t, TDC_SIGNED)
#define TDC_INT64(var, desc) TDC_VALUE(var, desc, int64_t, TDC_SIGNED)
#define TDC_FLOAT(var, desc) TDC_VALUE(var, desc, float, TDC_FP)
#define TDC_DOUBLE(var, desc) TDC_VALUE(var, desc, double, TDC_FP)


#endif /*TELEMETRIE_H_*/

+ 7
- 2
ldscript.ld View File

@@ -19,6 +19,11 @@ SECTIONS
*(.pio_isr)
_pio_isr_table_end = .;

. = ALIGN(4);
_tdc_value_table = .;
*(.tdc_value)
_tdc_value_table_end = .;

. = ALIGN(4);
*(.rodata)
*(.rodata.*)
@@ -51,11 +56,11 @@ SECTIONS
.stab.index 0 : { *(.stab.index) }
.stab.indexstr 0 : { *(.stab.indexstr) }
.comment 0 : { *(.comment) }
/* DWARF 1 */
.debug 0 : { *(.debug) }
.line 0 : { *(.line) }
/* GNU DWARF 1 extensions */
.debug_srcinfo 0 : { *(.debug_srcinfo) }
.debug_sfnames 0 : { *(.debug_sfnames) }


+ 200
- 0
src/telemetrie.c View File

@@ -0,0 +1,200 @@
/***************************************************************************
* Copyright (C) 02/2008 by Olaf Rempel *
* razzor@kopf-tisch.de *
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; version 2 of the License *
* *
* This program is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program; if not, write to the *
* Free Software Foundation, Inc., *
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
***************************************************************************/
#include <stdio.h>
#include <stdint.h>
#include <string.h>
#include "board.h" // ARRAY_SIZE()
#include "telemetrie.h"

/* extern symbols, defined in ldscript */
extern struct tdc_value _tdc_value_table;
extern struct tdc_value _tdc_value_table_end;

typedef uint32_t (txfunc_t)(const uint8_t *data, uint32_t size);

/* just eat the packet */
static uint32_t txdummy(const uint8_t *data, uint32_t size)
{
return -1;
}

/* table of txfuncs for routing/forwarding */
static txfunc_t *transmit_table[8] = {
&txdummy, &txdummy, &txdummy, &txdummy,
&txdummy, &txdummy, &txdummy, &txdummy,
};

static const struct tdc_hello_reply hello_reply = {
.cmd = TDC_REPLY | TDC_ADDR1 | TDC_HELLO,
.size = sizeof(struct tdc_hello_reply),
.name = "sam7fc-v0.01",
};

void tdc_register_txfunc(uint32_t addr, txfunc_t *txfunc)
{
if (addr <= ARRAY_SIZE(transmit_table))
transmit_table[addr] = txfunc;
}

int32_t tdc_transmit(uint32_t addr, const uint8_t *data, uint32_t size)
{
if (addr <= ARRAY_SIZE(transmit_table))
return transmit_table[addr](data, size);

return -1;
}


static void * alloc(uint32_t size)
{
return NULL;
}

static void free(void *p)
{
}

/*
void *blub = NULL;
func(&blub);
*/
int32_t tdc_get_vars(void **privdata)
{
struct tdc_value **value = (struct tdc_value **)privdata;

if (*value == NULL)
*value = &_tdc_value_table;

uint32_t id = (*value - &_tdc_value_table) / sizeof(struct tdc_value);

while (*value < &_tdc_value_table_end) {
uint32_t datalen = strlen((*value)->name);

struct tdc_getvars_reply *reply = alloc(sizeof(struct tdc_getvars_reply) + datalen);
reply->cmd = TDC_REPLY | TDC_ADDR1 | TDC_GETVARS;
reply->size = sizeof(struct tdc_getvars_reply) + datalen;
reply->id = id;
reply->flags = (*value)->flags;
memcpy(reply->name, (*value)->name, datalen);

int32_t ret = transmit_table[TDC_ADDR0]((const uint8_t *)reply, reply->size);
free(reply);

if (ret != reply->size)
return -1;

id++;
(*value)++;
}

/* TODO: all done */
(*value) = NULL;
return 0;
}

#if 0

static int32_t tdc_get_values(uint8_t *buf, uint32_t size, void **key)
{
if (*key == NULL)
*key = &_tdc_value_table;

uint32_t id = (*key - &_tdc_value_table) / sizeof(struct tdc_value);
uint32_t pos = 0;

while (*key < &_tdc_value_table_end) {
struct tdc_value *tmp = (struct tdc_value *)*key;
uint32_t datalen = (tmp->flags & TDC_SIZEMASK);

/* fits in buffer? */
if ((size - pos) < (2 + 1 + datalen))
return (pos > 0) ? pos : -1;

buf[pos++] = TDC_VALUEOP;
buf[pos++] = 1 + datalen;
buf[pos++] = id++;

memcpy(buf + pos, tmp->ptr, datalen);
pos += datalen;

*key += sizeof(struct tdc_value);
}
return pos;
}
#endif

/*
* parses tdc data
*/
int32_t tdc_parse_pkt(txfunc_t *txfunc, const uint8_t *data, uint32_t size)
{
struct tdc_pkt_header *head = (struct tdc_pkt_header *)data;

if (size < sizeof(struct tdc_pkt_header))
return -1;

/* if it's a hello-request, remember the txfunc as path to the host */
if ((head->cmd & (TDC_OPCODEMASK & TDC_DIR)) == TDC_HELLO)
transmit_table[TDC_ADDR0] = txfunc;

/* all replys go to the HOST */
if (head->cmd & TDC_REPLY) {
return transmit_table[TDC_ADDR0](data, head->size);
}

/* forward this packet? */
if ((head->cmd & TDC_ADDRMASK) != TDC_ADDR1) {
uint32_t addr = (head->cmd & TDC_ADDRMASK) >> 4;
return transmit_table[addr](data, head->size);
}

/* parse the packet */
switch (head->cmd & TDC_OPCODEMASK) {
/* HELLO from HOST */
case TDC_HELLO:
transmit_table[TDC_ADDR0]((const uint8_t *)&hello_reply, sizeof(hello_reply));
break;

case TDC_GETVARS:
// TODO: exec func
break;

case TDC_GETVALUE:
// TODO: exec func
break;

case TDC_SETVALUE:
// TODO: exec func
break;

case TDC_REQVALUES:
// TODO: exec func
break;

case TDC_TERMINAL:
// TODO: not possible?
break;

case TDC_USERDATA:
// TODO: currently not used
break;
};

return head->size;
}

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