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// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
// + Copyright (c) 04.2007 Holger Buss
// + only for non-profit use
// + www.MikroKopter.com
// + see the File "License.txt" for further Informations
// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
#include <avr/io.h>
#include <avr/interrupt.h>
#include <avr/wdt.h>
#include "eeprom.h"
#include "main.h"
#include "menu.h"
#include "timer0.h"
#include "uart.h"
#include "fc.h"
#include "_Settings.h"
#include "rc.h"
#define FALSE 0
#define TRUE 1
//int8_t test __attribute__ ((section (".noinit")));
uint8_t DebugGetRequest = 0, DebugDisplayRequest = 0, DebugDataRequest = 0, GetVersionRequest = 0;
volatile uint8_t txd_buffer[TXD_BUFFER_LEN];
volatile uint8_t rxd_buffer_locked = FALSE;
volatile uint8_t rxd_buffer[RXD_BUFFER_LEN];
volatile uint8_t txd_complete = TRUE;
volatile uint8_t ReceivedBytes = 0;
uint8_t RemotePollDisplayLine = 0;
uint8_t NurKanalAnforderung = 0;
uint8_t DebugTextAnforderung = 255;
uint8_t PcAccess = 100;
uint8_t MotorTest[4] = {0,0,0,0};
uint8_t DubWiseKeys[4] = {0,0,0,0};
uint8_t MySlaveAddr = 0;
uint8_t ConfirmFrame;
DebugOut_t DebugOut;
ExternControl_t ExternControl;
VersionInfo_t VersionInfo;
const uint8_t ANALOG_TEXT[32][16] =
{
//1234567890123456
"IntegralPitch ", //0
"IntegralRoll ",
"AccPitch ",
"AccRoll ",
"GyroYaw ",
"ReadingHight ", //5
"AccZ ",
"Thrust ",
"CompassHeading ",
"Voltage ",
"Receiver Level ", //10
"Analog11 ",
"GPSDevNorth ",
"GPSDevEast ",
"GPS_Pitch ",
"GPS_Roll ", //15
"Acc_Z ",
"MeanAccPitch ",
"MeanAccRoll ",
"IntegralErrPitch",
"IntegralErrRoll ", //20
"MeanIntPitch ",
"MeanIntRoll ",
"NeutralPitch ",
"RollOffset ",
"IntRoll*Factor ", //25
"ReadingGyroPitch",
"DirectCorrRoll ",
"ReadingGyroRoll ",
"CorrectionRoll ",
"I-AttRoll ", //30
"StickRoll "
};
/****************************************************************/
/* Initialization of the USART0 */
/****************************************************************/
void USART0_Init (void)
{
uint8_t sreg = SREG;
uint16_t ubrr = (uint16_t) ((uint32_t) SYSCLK/(8 * USART0_BAUD) - 1);
// disable all interrupts before configuration
cli();
// disable RX-Interrupt
UCSR0B &= ~(1 << RXCIE0);
// disable TX-Interrupt
UCSR0B &= ~(1 << TXCIE0);
// set direction of RXD0 and TXD0 pins
// set RXD0 (PD0) as an input pin
PORTD |= (1 << PORTD0);
DDRD &= ~(1 << DDD0);
// set TXD0 (PD1) as an output pin
PORTD |= (1 << PORTD1);
DDRD |= (1 << DDD1);
// USART0 Baud Rate Register
// set clock divider
UBRR0H = (uint8_t)(ubrr >> 8);
UBRR0L = (uint8_t)ubrr;
// USART0 Control and Status Register A, B, C
// enable double speed operation in
UCSR0A |= (1 << U2X0);
// enable receiver and transmitter in
UCSR0B = (1 << TXEN0) | (1 << RXEN0);
// set asynchronous mode
UCSR0C &= ~(1 << UMSEL01);
UCSR0C &= ~(1 << UMSEL00);
// no parity
UCSR0C &= ~(1 << UPM01);
UCSR0C &= ~(1 << UPM00);
// 1 stop bit
UCSR0C &= ~(1 << USBS0);
// 8-bit
UCSR0B &= ~(1 << UCSZ02);
UCSR0C |= (1 << UCSZ01);
UCSR0C |= (1 << UCSZ00);
// flush receive buffer
while ( UCSR0A & (1<<RXC0) ) UDR0;
// enable interrupts at the end
// enable RX-Interrupt
UCSR0B |= (1 << RXCIE0);
// enable TX-Interrupt
UCSR0B |= (1 << TXCIE0);
rxd_buffer_locked = FALSE;
// restore global interrupt flags
SREG = sreg;
}
/****************************************************************/
/* USART0 transmitter ISR */
/****************************************************************/
ISR(USART0_TX_vect)
{
static uint16_t ptr_txd_buffer = 0;
uint8_t tmp_tx;
if(!txd_complete) // transmission not completed
{
ptr_txd_buffer++; // die [0] wurde schon gesendet
tmp_tx = txd_buffer[ptr_txd_buffer];
// if terminating character or end of txd buffer was reached
if((tmp_tx == '\r') || (ptr_txd_buffer == TXD_BUFFER_LEN))
{
ptr_txd_buffer = 0; // reset txd pointer
txd_complete = 1; // stop transmission
}
UDR0 = tmp_tx; // send current byte will trigger this ISR again
}
// transmission completed
else ptr_txd_buffer = 0;
}
/****************************************************************/
/* USART0 receiver ISR */
/****************************************************************/
ISR(USART0_RX_vect)
{
static uint16_t crc;
static uint8_t ptr_rxd_buffer = 0;
uint8_t crc1, crc2;
uint8_t c;
c = UDR0; // catch the received byte
if(rxd_buffer_locked) return; // if txd buffer is locked immediately return
// the rxd buffer is unlocked
if((ptr_rxd_buffer == 0) && (c == '#')) // if rxd buffer is empty and syncronisation character is received
{
rxd_buffer[ptr_rxd_buffer++] = c; // copy 1st byte to buffer
crc = c; // init crc
}
#if 0
else if (ptr_rxd_buffer == 1) // handle address
{
rxd_buffer[ptr_rxd_buffer++] = c; // copy byte to rxd buffer
crc += c; // update crc
}
#endif
else if (ptr_rxd_buffer < RXD_BUFFER_LEN) // collect incomming bytes
{
if(c != '\r') // no termination character
{
rxd_buffer[ptr_rxd_buffer++] = c; // copy byte to rxd buffer
crc += c; // update crc
}
else // termination character was received
{
// the last 2 bytes are no subject for checksum calculation
// they are the checksum itself
crc -= rxd_buffer[ptr_rxd_buffer-2];
crc -= rxd_buffer[ptr_rxd_buffer-1];
// calculate checksum from transmitted data
crc %= 4096;
crc1 = '=' + crc / 64;
crc2 = '=' + crc % 64;
// compare checksum to transmitted checksum bytes
if((crc1 == rxd_buffer[ptr_rxd_buffer-2]) && (crc2 == rxd_buffer[ptr_rxd_buffer-1]))
{ // checksum valid
rxd_buffer_locked = TRUE; // lock the rxd buffer
ReceivedBytes = ptr_rxd_buffer; // store number of received bytes
rxd_buffer[ptr_rxd_buffer] = '\r'; // set termination character
// if 2nd byte is an 'R' enable watchdog that will result in an reset
if(rxd_buffer[2] == 'R') {wdt_enable(WDTO_250MS);} // Reset-Commando
}
else
{ // checksum invalid
rxd_buffer_locked = FALSE; // unlock rxd buffer
}
ptr_rxd_buffer = 0; // reset txd buffer
}
} // buffer overrun
else
{
ptr_rxd_buffer = 0; // reset rxd buffer
rxd_buffer_locked = FALSE; // unlock rxd buffer
}
}
// --------------------------------------------------------------------------
void AddCRC(uint16_t datalen)
{
uint16_t tmpCRC = 0,i;
for(i = 0; i < datalen;i++)
{
tmpCRC += txd_buffer[i];
}
tmpCRC %= 4096;
txd_buffer[i++] = '=' + tmpCRC / 64;
txd_buffer[i++] = '=' + tmpCRC % 64;
txd_buffer[i++] = '\r';
txd_complete = 0;
UDR0 = txd_buffer[0]; // initiates the transmittion
}
// --------------------------------------------------------------------------
void SendOutData(uint8_t cmd,uint8_t module, uint8_t *snd, uint8_t len)
{
uint16_t pt = 0;
uint8_t a,b,c;
uint8_t ptr = 0;
txd_buffer[pt++] = '#'; // Start character
txd_buffer[pt++] = module; // Address (a=0; b=1,...)
txd_buffer[pt++] = cmd; // Command
while(len)
{
if(len) { a = snd[ptr++]; len--;} else a = 0;
if(len) { b = snd[ptr++]; len--;} else b = 0;
if(len) { c = snd[ptr++]; len--;} else c = 0;
txd_buffer[pt++] = '=' + (a >> 2);
txd_buffer[pt++] = '=' + (((a & 0x03) << 4) | ((b & 0xf0) >> 4));
txd_buffer[pt++] = '=' + (((b & 0x0f) << 2) | ((c & 0xc0) >> 6));
txd_buffer[pt++] = '=' + ( c & 0x3f);
}
AddCRC(pt); // add checksum after data block and initates the transmission
}
// --------------------------------------------------------------------------
void Decode64(uint8_t *ptrOut, uint8_t len, uint8_t ptrIn, uint8_t max)
{
uint8_t a,b,c,d;
uint8_t ptr = 0;
uint8_t x,y,z;
while(len)
{
a = rxd_buffer[ptrIn++] - '=';
b = rxd_buffer[ptrIn++] - '=';
c = rxd_buffer[ptrIn++] - '=';
d = rxd_buffer[ptrIn++] - '=';
if(ptrIn > max - 2) break;
x = (a << 2) | (b >> 4);
y = ((b & 0x0f) << 4) | (c >> 2);
z = ((c & 0x03) << 6) | d;
if(len--) ptrOut[ptr++] = x; else break;
if(len--) ptrOut[ptr++] = y; else break;
if(len--) ptrOut[ptr++] = z; else break;
}
}
// --------------------------------------------------------------------------
void ProcessRxData(void)
{
// if data in the rxd buffer are not locked immediately return
if(!rxd_buffer_locked) return;
uint8_t tmp_char_arr2[2]; // local buffer
PcAccess = 255;
switch(rxd_buffer[2])
{
case 'a':// Labels of the Analog Deboug outputs
Decode64((uint8_t *) &tmp_char_arr2[0], sizeof(tmp_char_arr2), 3, ReceivedBytes);
DebugTextAnforderung = tmp_char_arr2[0];
break;
case 'b': // extern control
Decode64((uint8_t *) &ExternControl,sizeof(ExternControl), 3, ReceivedBytes);
RemoteButtons |= ExternControl.RemoteButtons;
ConfirmFrame = ExternControl.Frame;
break;
case 'c': // extern control with debug request
Decode64((uint8_t *) &ExternControl,sizeof(ExternControl),3,ReceivedBytes);
RemoteButtons |= ExternControl.RemoteButtons;
ConfirmFrame = ExternControl.Frame;
DebugDataRequest = 1;
break;
case 'h':// x-1 display columns
Decode64((uint8_t *) &tmp_char_arr2[0],sizeof(tmp_char_arr2),3,ReceivedBytes);
RemoteButtons |= tmp_char_arr2[0];
if(tmp_char_arr2[1] == 255) NurKanalAnforderung = 1;
else NurKanalAnforderung = 0; // keine Displaydaten
DebugDisplayRequest = 1;
break;
case 't':// motor test
Decode64((uint8_t *) &MotorTest[0],sizeof(MotorTest),3,ReceivedBytes);
break;
case 'k':// keys from DubWise
Decode64((uint8_t *) &DubWiseKeys[0],sizeof(DubWiseKeys),3,ReceivedBytes);
ConfirmFrame = DubWiseKeys[3];
break;
case 'v': // get version and board release
GetVersionRequest = 1;
break;
case 'g':// get debug data
DebugGetRequest = 1;
break;
case 'q':// get settings
Decode64((uint8_t *) &tmp_char_arr2[0],sizeof(tmp_char_arr2),3,ReceivedBytes);
if(tmp_char_arr2[0] != 0xff)
{
if(tmp_char_arr2[0] > 5) tmp_char_arr2[0] = 5; // limit to 5
// load requested parameter set
ParamSet_ReadFromEEProm(tmp_char_arr2[0]);
SendOutData('L' + tmp_char_arr2[0] -1,MySlaveAddr,(uint8_t *) &ParamSet.ChannelAssignment[0],PARAMSET_STRUCT_LEN);
}
else // send active parameter set
SendOutData('L' + GetParamByte(PID_ACTIVE_SET)-1,MySlaveAddr,(uint8_t *) &ParamSet.ChannelAssignment[0],PARAMSET_STRUCT_LEN);
break;
case 'l':
case 'm':
case 'n':
case 'o':
case 'p': // save parameterset
Decode64((uint8_t *) &ParamSet.ChannelAssignment[0],PARAMSET_STRUCT_LEN,3,ReceivedBytes);
ParamSet_WriteToEEProm(rxd_buffer[2] - 'l' + 1);
TurnOver180Pitch = (int32_t) ParamSet.AngleTurnOverPitch * 2500L;
TurnOver180Roll = (int32_t) ParamSet.AngleTurnOverRoll * 2500L;
Beep(GetActiveParamSet());
break;
}
// unlock the rxd buffer after processing
rxd_buffer_locked = FALSE;
}
//############################################################################
//Routine für die Serielle Ausgabe
int16_t uart_putchar (int8_t c)
//############################################################################
{
if (c == '\n')
uart_putchar('\r');
// wait until previous character was send
loop_until_bit_is_set(UCSR0A, UDRE0);
//Ausgabe des Zeichens
UDR0 = c;
return (0);
}
//---------------------------------------------------------------------------------------------
void TransmitTxData(void)
{
static int16_t Debug_Timer = 0;
if(!txd_complete) return;
if(DebugGetRequest && txd_complete) // Bei Get werden die vom PC einstellbaren Werte vom PC zurückgelesen
{
SendOutData('G',MySlaveAddr,(uint8_t *) &ExternControl,sizeof(ExternControl));
DebugGetRequest = 0;
}
if((CheckDelay(Debug_Timer) || DebugDataRequest) && txd_complete)
{
SendOutData('D',MySlaveAddr,(uint8_t *) &DebugOut,sizeof(DebugOut));
DebugDataRequest = 0;
Debug_Timer = SetDelay(MIN_DEBUG_INTERVALL);
}
if(DebugTextAnforderung != 255) // Texte für die Analogdaten
{
SendOutData('A',DebugTextAnforderung + '0',(uint8_t *) ANALOG_TEXT[DebugTextAnforderung],16);
DebugTextAnforderung = 255;
}
if(ConfirmFrame && txd_complete) // Datensatz ohne CRC bestätigen
{
txd_buffer[0] = '#';
txd_buffer[1] = ConfirmFrame;
txd_buffer[2] = '\r';
txd_complete = 0;
ConfirmFrame = 0;
UDR0 = txd_buffer[0];
}
if(DebugDisplayRequest && txd_complete)
{
LCD_PrintMenu();
DebugDisplayRequest = 0;
if(++RemotePollDisplayLine == 4 || NurKanalAnforderung)
{
SendOutData('4',0,(uint8_t *)&PPM_in,sizeof(PPM_in)); // DisplayZeile übertragen
RemotePollDisplayLine = -1;
}
else SendOutData('0' + RemotePollDisplayLine,0,(uint8_t *)&DisplayBuff[20 * RemotePollDisplayLine],20); // DisplayZeile übertragen
}
if(GetVersionRequest && txd_complete)
{
SendOutData('V',MySlaveAddr,(uint8_t *) &VersionInfo,sizeof(VersionInfo));
GetVersionRequest = 0;
}
}