char TWI_SendAddress ( char Address, char TWI_RW )
{
char twst;
int timer;
TWCR = (1<<TWINT)|(1<<TWSTA)|(1<<TWEN);
timer = CLOCK_RegisterCoundowntimer();
if( timer == CLOCK_FAILED )
return FALSE;
CLOCK_SetCountdownTimer( timer , TWITIMEOUT, MSECOUND );
while (!(TWCR & (1<<TWINT)))
{
if ( CLOCK_GetCountdownTimer( timer ) == 0 )
{
CLOCK_ReleaseCountdownTimer( timer );
return FALSE;
}
}
CLOCK_ReleaseCountdownTimer( timer );
twst = TWSR & 0xF8;
if ((twst != TWI_START) && (twst != TWI_REP_START)) return FALSE;
TWDR = (Address<<1) + TWI_RW;
TWCR = (1<<TWINT)|(1<<TWEN);
timer = CLOCK_RegisterCoundowntimer();
if( timer == CLOCK_FAILED )
return FALSE;
CLOCK_SetCountdownTimer( timer , TWITIMEOUT, MSECOUND );
while (!(TWCR & (1<<TWINT)))
{
if ( CLOCK_GetCountdownTimer( timer ) == 0 )
{
CLOCK_ReleaseCountdownTimer( timer );
return FALSE;
}
}
CLOCK_ReleaseCountdownTimer( timer );
twst = TWSR & 0xF8;
if ((twst != TWI_MTX_ADR_ACK) && (twst != TWI_MRX_ADR_ACK)) return FALSE;
return TRUE;
}
char TWI_Write ( char Data )
{
int timer;
char twst;
TWDR = Data;
TWCR = (1<<TWINT)|(1<<TWEN);
timer = CLOCK_RegisterCoundowntimer();
if( timer == CLOCK_FAILED )
return FALSE;
CLOCK_SetCountdownTimer( timer , TWITIMEOUT, MSECOUND );
while (!(TWCR & (1<<TWINT)))
{
if ( CLOCK_GetCountdownTimer( timer ) == 0 )
{
CLOCK_ReleaseCountdownTimer( timer );
return FALSE;
}
}
CLOCK_ReleaseCountdownTimer( timer );
twst = TWSR & 0xF8;
if (twst != TWI_MTX_DATA_ACK) return 1;
return 0;
}
void TWI_SendStart(void)
{
int timer;
TWCR = (1<<TWINT)|(1<<TWSTA)|(1<<TWEN); //make start
timer = CLOCK_RegisterCoundowntimer();
if( timer == CLOCK_FAILED )
return;
CLOCK_SetCountdownTimer( timer , TWITIMEOUT, MSECOUND );
while (!(TWCR & (1<<TWINT)))
{
if ( CLOCK_GetCountdownTimer( timer ) == 0 )
{
CLOCK_ReleaseCountdownTimer( timer );
return;
}
}
CLOCK_ReleaseCountdownTimer( timer );
if (( TWSR != TWI_START) && ( TWSR != TWI_REP_START))
return;
return;
}
/*------------------------------------------------------------------------------------------------------------*/
void mp3client_init( void )
{
MP3_SOCKET = NO_SOCKET_USED;
mp3timer = CLOCK_RegisterCoundowntimer();
MP3_FIFO = Get_FIFO ( mp3_buffer, mp3_buffer_size );
timer0_init( 25 );
timer0_RegisterCallbackFunction( mp3client_stream );
printf_P( PSTR("Tsumani v0.1.3 MP3-streamingengine gestartet \r\n$Id: mp3-streaming.c 67 2008-09-07 11:43:32Z sharan $.\r\n"));
}
void TWI_SendStop ( void )
{
int timer;
TWCR = (1<<TWINT)|(1<<TWEN)|(1<<TWSTO);
timer = CLOCK_RegisterCoundowntimer();
if( timer == CLOCK_FAILED )
return;
CLOCK_SetCountdownTimer( timer , TWITIMEOUT, MSECOUND );
while (!(TWCR & (1<<TWINT)))
{
if ( CLOCK_GetCountdownTimer( timer ) == 0 )
{
CLOCK_ReleaseCountdownTimer( timer );
return;
}
}
CLOCK_ReleaseCountdownTimer( timer );
}
char TWI_ReadNack ( void )
{
int timer;
TWCR = (1<<TWINT)|(1<<TWEN);
timer = CLOCK_RegisterCoundowntimer();
if( timer == CLOCK_FAILED )
return FALSE;
CLOCK_SetCountdownTimer( timer , TWITIMEOUT, MSECOUND );
while (!(TWCR & (1<<TWINT)))
{
if ( CLOCK_GetCountdownTimer( timer ) == 0 )
{
CLOCK_ReleaseCountdownTimer( timer );
return FALSE;
}
}
CLOCK_ReleaseCountdownTimer( timer );
return TWDR;
}
/* Download CEPT-Hypertext Page from Ulm */
int applicationBtxHttpGet(char *url, unsigned long ulmIp ,char *data, int *status)
{
volatile unsigned int httpServerSocket = NO_SOCKET_USED;
char dataByte;
char *dataPointer = data;
unsigned char timeoutTimerHandle;
int dataCount = 0; /* Counter to prevent buffer overflows */
/* Pass 1: Establish server connection */
httpServerSocket = Connect2IP(ulmIp,BTX_ULM_PORT); /* Connect http-server (Ulm) */
if(httpServerSocket == NO_SOCKET_USED)
return -1; /* Connection failed */
/* Pass 2: Perform HTTP-Request */
STDOUT_Set_TCP_Socket(httpServerSocket);
printf_P(PSTR("GET %s HTTP/1.0\r\nHost: " BTX_ULM_HOST "\r\n\r\n"),url);
STDOUT_Flush();
if(httpServerSocket == NO_SOCKET_USED)
return -1; /* Connection closed unexpectetly */
timeoutTimerHandle = CLOCK_RegisterCoundowntimer(); /* Register timer */
while(GetBytesInSocketData(httpServerSocket) == 0); /* Trigger on incoming data */
while(GetBytesInSocketData(httpServerSocket) > 0)
{
dataByte = GetByteFromSocketData(httpServerSocket);
if(dataCount < BTX_CEPT_HYPERTEXT_BUFFERSIZE-1)
{
*dataPointer = dataByte;
dataPointer++;
dataCount++;
}
/* Handle connection timeout (3 retrys) */
if(GetBytesInSocketData(httpServerSocket) == 0)
{
CLOCK_SetCountdownTimer (timeoutTimerHandle, 8, MSECOUND );
while(CLOCK_GetCountdownTimer(timeoutTimerHandle) > 0);
if(GetBytesInSocketData(httpServerSocket) == 0)
{
CLOCK_SetCountdownTimer (timeoutTimerHandle, 16, MSECOUND );
while(CLOCK_GetCountdownTimer(timeoutTimerHandle) > 0);
if(GetBytesInSocketData(httpServerSocket) == 0)
{
CLOCK_SetCountdownTimer (timeoutTimerHandle, 32, MSECOUND );
while(CLOCK_GetCountdownTimer(timeoutTimerHandle) > 0);
if(GetBytesInSocketData(httpServerSocket) == 0)
break;
}
}
}
}
CLOCK_ReleaseCountdownTimer(timeoutTimerHandle); /* Free timer */
*dataPointer = '\0'; /* Add a 0 to make the string functions happy */
*status = atoi(&data[8]); /* Calculate status code */
CloseTCPSocket (httpServerSocket); /* Close connection */
STDOUT_Set_RS232(); /* Set STDOUT to console */
return 0;
}
/*! \brief Holt von einen Hostname die IP-Adressen
* \warning Es ist drauf zu achten das genug Speicher vorgesehen ist fuer die Anworten und das auch Packete mit entsprechender groesse
* vom Ethernetmodul empfagen werden koennen und nicht verworfen werden. Siehe MAX_FRAMELEN in enc28j60.h .
* \param HOSTNAME Zeiger auf den Hostnamestring der mit 0 teminiert ist.
* \retval IP Die IP des Hostname, wenn IP = DNS_NO_ANSWER ist war die Anfrage nicht erfolgreich. Es sollte der DNSserver Eintrag ueberprueft werden
* oder die richtigkeit des Hostname.
*/
unsigned long DNS_ResolveName( char * HOSTNAME )
{
int i,UDP_socket;
int timer;
// udp-puffer anlegen
unsigned char * udpbuffer;
udpbuffer = (unsigned char*) __builtin_alloca (( size_t ) DNS_BUFFER_LENGHT );
// DNS-struct in udp-puffer anlegen
struct DNS_header * DNS_question;
DNS_question = ( struct DNS_header *) udpbuffer;
// DNS anfrage bauen
DNS_question->TransactionID = 0x1acd;
DNS_question->Flags = ChangeEndian16bit( 0x0100 );
DNS_question->Questions = ChangeEndian16bit( 1 );
DNS_question->Answer_RRs = 0;
DNS_question->Authority_RRs = 0;
DNS_question->Additional_RRs = 0;
// Hostename für DNS umwandeln, in i steht die länge des neuen strings
i = DNS_convertHostName( HOSTNAME, DNS_question->Queries );
DNS_question->Queries[i + 1] = '\0';
DNS_question->Queries[i + 2] = 1;
DNS_question->Queries[i + 3] = '\0';
DNS_question->Queries[i + 4] = 1;
i = i + 5;
// Antwortstruct anlegen
struct DNS_answer * DNS_ans;
DNS_ans = ( void * ) &DNS_question->Queries[i];
// UDP-Paccket senden
UDP_socket = UDP_RegisterSocket( DNSserver , DNS_SERVER_PORT, DNS_BUFFER_LENGHT , udpbuffer);
if ( UDP_socket == UDP_SOCKET_ERROR )
return( DNS_NO_ANSWER );
UDP_SendPacket( UDP_socket, DNS_HEADER_LENGHT + i , udpbuffer);
// empfang des der DNS-Atwort abwarten
timer = CLOCK_RegisterCoundowntimer();
if ( timer == CLOCK_FAILED ) return ( DNS_NO_ANSWER );
CLOCK_SetCountdownTimer ( timer, DNS_REQUEST_TIMEOUT, MSECOUND );
while ( 1 )
{
if ( UDP_GetSocketState( UDP_socket ) == UDP_SOCKET_BUSY )
{
CLOCK_ReleaseCountdownTimer( timer );
UDP_CloseSocket( UDP_socket );
if ( ( ChangeEndian16bit( DNS_question->Flags ) & 0x000f ) != 0 ) return ( DNS_NO_ANSWER );
break;
}
if ( CLOCK_GetCountdownTimer( timer ) == 0 )
{
CLOCK_ReleaseCountdownTimer( timer );
UDP_CloseSocket( UDP_socket );
return( DNS_NO_ANSWER );
}
}
// Antwortpacket auseinander nehmen
while ( 1 )
{
// Wenn noch nicht der Hosteintrag dann nächsten DNS-Answer Datensatz
if ( ChangeEndian16bit( DNS_ans->Type ) != A_HOSTNAME )
{
i = i + ChangeEndian16bit( DNS_ans->Datalenght ) + DNS_ANSWER_HEADER_LENGHT;
DNS_ans = ( void * ) &DNS_question->Queries[i];
}
else break;
}
return( DNS_ans->Adress );
}
