flm01/mote/v2/avr/ctrl.c

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//
// ctrl.c : AVR uC code for ctrl buffer initialisation and put/get ops
//
// Copyright (c) 2010 flukso.net
//
// 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; either version 2
// of the License, or (at your option) any later version.
//
// 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
//
// $Id$
#include "global.h"
#include "buffer.h"
#include "ctrl.h"
#include "encode.h"
cBuffer ctrlRxBuffer; // ctrl receive buffer
cBuffer ctrlTxBuffer; // ctrl transmit buffer
static char ctrlRxData[CTRL_RX_BUFFER_SIZE];
static char ctrlTxData[CTRL_TX_BUFFER_SIZE];
extern uint8_t phy_to_log[];
void ctrlInit(void)
{
// initialize the CTRL receive buffer
bufferInit(&ctrlRxBuffer, (u08*) ctrlRxData, CTRL_RX_BUFFER_SIZE);
// initialize the CTRL transmit buffer
bufferInit(&ctrlTxBuffer, (u08*) ctrlTxData, CTRL_TX_BUFFER_SIZE);
}
uint8_t ctrlTxBufferIsEmpty(void)
{
if(ctrlTxBuffer.datalength == 0) {
return TRUE;
}
else {
return FALSE;
}
}
uint8_t ctrlAddToTxBuffer(uint8_t data)
{
return bufferAddToEnd(&ctrlTxBuffer, data);
}
uint8_t ctrlGetFromTxBuffer(uint8_t* data) {
// make sure we have data in the Tx buffer
if(ctrlTxBuffer.datalength) {
// get byte from beginning of buffer
*data = bufferGetFromFront(&ctrlTxBuffer);
return TRUE;
}
else {
// no data
return FALSE;
}
}
uint8_t ctrlRxBufferIsEmpty(void)
{
if(ctrlRxBuffer.datalength == 0) {
return TRUE;
}
else {
return FALSE;
}
}
uint8_t ctrlAddToRxBuffer(uint8_t data)
{
return bufferAddToEnd(&ctrlRxBuffer, data);
}
uint8_t ctrlGetFromRxBuffer(uint8_t* data)
{
// make sure we have data in the Rx buffer
if(ctrlRxBuffer.datalength) {
// get byte from beginning of buffer
*data = bufferGetFromFront(&ctrlRxBuffer);
return TRUE;
}
else {
// no data
return FALSE;
}
}
void ctrlFlushReceiveBuffer(void)
{
ctrlRxBuffer.datalength = 0;
}
void ctrlRxToTxLoop(void)
{
uint8_t data;
while (ctrlGetFromRxBuffer(&data)) {
ctrlAddToTxBuffer(data);
}
}
void ctrlDecode(void)
{
uint8_t cmd[2];
if (ctrlGetFromRxBuffer(cmd) && ctrlGetFromRxBuffer(cmd+1)) {
ctrlAddToTxBuffer(cmd[0]);
ctrlAddToTxBuffer(cmd[1]);
switch (cmd[0]) {
case 'g':
ctrlCmdGet(cmd[1]);
break;
case 's':
ctrlCmdSet(cmd[1]);
break;
case 'c':
if (cmd[1] == 't') ctrlCmdCommit();
break;
}
ctrlAddToTxBuffer('.');
}
ctrlFlushReceiveBuffer();
}
void ctrlCmdGet(uint8_t cmd)
{
uint8_t i;
uint16_t hex;
switch (cmd) {
case 'p':
for (i = 0 ; i < MAX_SENSORS; i++) {
hex = btoh(phy_to_log[i]);
ctrlAddToTxBuffer((uint8_t)(hex >> 8));
ctrlAddToTxBuffer((uint8_t)hex);
}
break;
}
}
void ctrlCmdSet(uint8_t cmd)
{
/* TODO */
}
void ctrlCmdCommit(void)
{
/* TODO */
}