sppsend.c

ti-Chipcon CC1010 1G以下Soc源码库。包括rf,powermodes,clockmodes,flashRW,interrupts,timer,pwm,uart...所有底层驱动源码

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 *      ***   +++   ***                                                      *
 *      ***   + +   ***                                                      *
 *      ***   +                            CHIPCON CC1010                    *
 *      ***   + +   ***                      CUL - spp                       *
 *      ***   +++   ***                                                      *
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 * Author:              JOL                                                  *
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 * Revision history:                                                         *
 *                                                                           *
 * $Log: sppSend.c,v $
 * Revision 1.2  2002/11/21 10:50:11  tos
 * Cosmetic change: corrected inconsistent header text.
 *
 * Revision 1.1  2002/10/14 12:27:34  tos
 * Initial version in CVS.
 *
 *                                                                           *
 ****************************************************************************/

#include <chipcon/sppInternal.h>

//----------------------------------------------------------------------------
//  byte sppSend (SPP_TX_INFO xdata *pTXInfo)
//
//  Description:
//      If the transceiver is ready (in idle mode), the transmit section will
//		be powered up and the RF interrupt enabled. The RF ISR will then 
//		transmit the packet (pTXInfo) and receive the ack (if requested). If
//		requested (sppSettings.txAttempts = n), the packet will be re-
//		transmitted (n-1) times, until the ack is received. When finished the 
//		transmit section will be powered down.
//		
//		This function will return immediately and the application can 
//		continue while the ISR transmits the packet. When finished, 
//		sppStatus() will return IDLE_MODE. During the transmission it will 
//		return TX_MODE or TXACK_MODE.
//
//		After the transmission: Use pTXInfo->status to find out what happened:
//			SPP_TX_ACK_INVALID = Something was received, but not the ack
//			SPP_TX_ACK_TIMEOUT = No response
//			SPP_TX_FINISHED
//
//		sppSettings.txAckTimeout gives the ack timeout in msecs.
//
//  Arguments:
//      SPP_TX_INFO xdata *pTXInfo
//			An SPP_TX_INFO struct must be prepared before the transmission,
//			including the following values:
//				destination (SPP_BROADCAST or 1-255)
//				flags (SPP_ACK_REQ | SPP_ENCRYPTED_DATA)
//				dataLen (Length of *pDataBuffer, 0-255)
//				pDataBuffer (pointer to the transmission data buffer)
//
//  Return value:
//		byte
//      	SPP_TX_STARTED if OK
//			SPP_BUSY if not ready
//----------------------------------------------------------------------------
byte sppSend (SPP_TX_INFO xdata *pTXInfo) {

	// Begin transmission only if we're in the idle state
	INT_GLOBAL_ENABLE (INT_OFF);
	if (sppIntData.mode == SPP_IDLE_MODE) {

		// Initialize the fsm
		sppRFStateFunc = TX_START;
		sppIntData.mode = SPP_TX_MODE;
		sppIntData.pTXI = pTXInfo;
		sppIntData.usedTxAttempts = 0;
		INT_GLOBAL_ENABLE (INT_ON);

		// Enable transceiver interrupt and enter the FSM
		INT_SETFLAG (INUM_RF, INT_CLR);
		INT_PRIORITY (INUM_RF, INT_HIGH);
		INT_ENABLE (INUM_RF, INT_ON);

		// Start TX
		SPP_POWER_UP_TX();

		return SPP_TX_STARTED;
	} else {
		INT_GLOBAL_ENABLE (INT_ON);
		return SPP_BUSY;
	}
} // sppSend