//===============================================================================================
__inline AT91F_US_START_TRANSMITION(AT91PS_USART COM, uint8 *data, int size)
{
portENTER_CRITICAL();
{
AT91F_US_EnableTx(COM);
AT91F_US_EnableIt(COM,AT91C_US_TXEMPTY | AT91C_US_TXEN );
COM->US_TCR = 0;
COM->US_TNCR = 0;
COM->US_TPR = (unsigned int) data;
COM->US_TCR = size;
}
portEXIT_CRITICAL();
}
//===============================================================================================
__inline AT91F_US_START_RECEIVE(AT91PS_USART COM, uint8 *data, int size)
{
portENTER_CRITICAL();
{
AT91F_US_TIMEOUT(COM,0x40);
AT91F_US_EnableIt(COM,AT91C_US_RXBUFF | AT91C_US_TIMEOUT | AT91C_US_RXBUFF | AT91C_US_FRAME | AT91C_US_PARE |AT91C_US_OVRE);
AT91F_US_EnableRx(COM);
COM->US_RCR = 0;
COM->US_RNCR = 0;
COM->US_RPR = (unsigned int) data;
COM->US_RCR = size;
}
portEXIT_CRITICAL();
}
//===============================================================================================
inline void AT91F_US_START_RECEIVE(AT91PS_USART COM, uint8 *data, int size)
{
portENTER_CRITICAL();
{
AT91F_US_TIMEOUT_SET(COM,0x20);
AT91F_US_EnableIt(COM, AT91C_US_TIMEOUT | AT91C_US_RXBUFF);
COM->US_RNCR = 0;
COM->US_RNCR = 0;
COM->US_RPR = (unsigned int) data;
COM->US_RCR = size;
AT91F_US_EnableRx(COM);
}
portEXIT_CRITICAL();
}
/*
* See the serial2.h header file.
*/
xComPortHandle xSerialPortInitMinimal( unsigned long ulWantedBaud, unsigned portBASE_TYPE uxQueueLength )
{
xComPortHandle xReturn = serHANDLE;
extern void ( vUART_ISR )( void );
/* Create the queues used to hold Rx and Tx characters. */
xRxedChars = xQueueCreate( uxQueueLength, ( unsigned portBASE_TYPE ) sizeof( signed char ) );
xCharsForTx = xQueueCreate( uxQueueLength + 1, ( unsigned portBASE_TYPE ) sizeof( signed char ) );
/* If the queues were created correctly then setup the serial port
hardware. */
if( ( xRxedChars != serINVALID_QUEUE ) && ( xCharsForTx != serINVALID_QUEUE ) )
{
portENTER_CRITICAL();
{
/* Enable the USART clock. */
AT91F_PMC_EnablePeriphClock( AT91C_BASE_PMC, 1 << AT91C_ID_US0 );
AT91F_PIO_CfgPeriph( AT91C_BASE_PIOA, ( ( unsigned long ) AT91C_PA5_RXD0 ) | ( ( unsigned long ) AT91C_PA6_TXD0 ), serNO_PERIPHERAL_B_SETUP );
/* Set the required protocol. */
AT91F_US_Configure( serCOM0, configCPU_CLOCK_HZ, AT91C_US_ASYNC_MODE, ulWantedBaud, serNO_TIMEGUARD );
/* Enable Rx and Tx. */
serCOM0->US_CR = AT91C_US_RXEN | AT91C_US_TXEN;
/* Enable the Rx interrupts. The Tx interrupts are not enabled
until there are characters to be transmitted. */
AT91F_US_EnableIt( serCOM0, AT91C_US_RXRDY );
/* Enable the interrupts in the AIC. */
AT91F_AIC_ConfigureIt( AT91C_BASE_AIC, AT91C_ID_US0, serINTERRUPT_LEVEL, AT91C_AIC_SRCTYPE_INT_LEVEL_SENSITIVE, ( void (*)( void ) ) vSerialISREntry );
AT91F_AIC_EnableIt( AT91C_BASE_AIC, AT91C_ID_US0 );
}
portEXIT_CRITICAL();
}
else
{
xReturn = ( xComPortHandle ) 0;
}
/* This demo file only supports a single port but we have to return
something to comply with the standard demo header file. */
return xReturn;
}
//*----------------------------------------------------------------------------
//* \fn AT91F_DBGU_Init
//* \brief This function is used to send a string through the DBGU channel (Very low level debugging)
//*----------------------------------------------------------------------------
void AT91F_DBGU_Init(void)
{
unsigned int rst_status = AT91F_RSTGetStatus(AT91C_BASE_RSTC);
dbgu_rb_init();
//* Open PIO for DBGU
AT91F_DBGU_CfgPIO();
//* Enable Transmitter & receivier
((AT91PS_USART) AT91C_BASE_DBGU)->US_CR =
AT91C_US_RSTTX | AT91C_US_RSTRX;
//* Configure DBGU
AT91F_US_Configure((AT91PS_USART) AT91C_BASE_DBGU, // DBGU base address
MCK, AT91C_US_ASYNC_MODE, // Mode Register to be programmed
AT91C_DBGU_BAUD, // Baudrate to be programmed
0); // Timeguard to be programmed
//* Enable Transmitter & receivier
((AT91PS_USART) AT91C_BASE_DBGU)->US_CR = AT91C_US_RXEN | AT91C_US_TXEN;
//* Enable USART IT error and AT91C_US_ENDRX
AT91F_US_EnableIt((AT91PS_USART) AT91C_BASE_DBGU, AT91C_US_RXRDY);
//* open interrupt
sysirq_register(AT91SAM7_SYSIRQ_DBGU, &DBGU_irq_handler);
AT91F_DBGU_Printk("\n\r");
AT91F_DBGU_Printk("(C) 2006-2011 by Harald Welte <*****@*****.**>\n\r"
"This software is FREE SOFTWARE licensed under GNU GPL\n\r");
AT91F_DBGU_Printk("Version " COMPILE_SVNREV
" compiled " COMPILE_DATE
" by " COMPILE_BY "\n\r\n\r");
AT91F_DBGU_Printk("\n\rDEBUG Interface:\n\r"
"0) Set Pull-up 1) Clear Pull-up 2) Toggle LED1 3) "
"Toggle LED2\r\n9) Reset\n\r");
debugp("RSTC_SR=0x%08x\n", rst_status);
}
//===============================================================================================
__inline void AT91F_US_INTERRUPT(AT91PS_USART COM,xQueueHandle *pxQueue,ErrorHandle *pxError)
{
unsigned int status;
unsigned int size;
portBASE_TYPE xTaskWokenByPost = pdFALSE;
/* What caused the interrupt? */
status = COM->US_CSR &= COM->US_IMR;
if (status & (AT91C_US_RXBUFF | AT91C_US_FRAME | AT91C_US_PARE |AT91C_US_OVRE))
{
AT91F_US_DisableIt(COM, (status & (AT91C_US_RXBUFF | AT91C_US_FRAME | AT91C_US_PARE |AT91C_US_OVRE)));
} else {
if ((status & AT91C_US_TIMEOUT ))
{
AT91F_US_DisableIt(COM, AT91C_US_TIMEOUT | AT91C_US_RXBUFF );
AT91F_US_DisableRx(COM);
size = (unsigned int)COM->US_RCR;
xQueueSendFromISR( *pxQueue, &size, &xTaskWokenByPost );
}
}
if (status & AT91C_US_ENDTX)
{ // Data transmitted
AT91F_US_DisableIt(COM, AT91C_US_ENDTX );
AT91F_US_DisableTx(COM);
AT91F_US_EnableIt(COM, AT91C_US_TXEMPTY );
}
if (status & AT91C_US_TXEMPTY)
{
size = (unsigned int)COM->US_TCR;
xQueueSendFromISR( *pxQueue, &size, &xTaskWokenByPost );
AT91F_US_DisableIt(COM, AT91C_US_TXEMPTY );
}
if( xTaskWokenByPost)
{
portYIELD_FROM_ISR();
}
AT91C_BASE_AIC->AIC_EOICR = 0;
}
