參數(shù)資料
型號(hào)： C16X
廠商： SIEMENS AG
元件分類： 8位微控制器
英文描述： 8-Bit Microcontroller(8位微控制器)
中文描述： 8位微控制器（8位微控制器）
文件頁(yè)數(shù)： 26/40頁(yè)
文件大?。?/td> 460K
代理商： C16X
Using the
SSC (SPI) Interface in a Multimaster System
Semiconductor Group
26 of 40
AP1632 06.96
4.1.8 SSC transmit routine -
TX_SSC.C
*****************************************************************************
* program : tx_ssc.c *
* name : Andreas Hettmann Siemens, Cupertino/CA *
* date : 5'96 *
* function : SSC TX routines *
*****************************************************************************/
include <reg167.h> /* register definitions */
include "ssc.h" /* int # definitions */
xtern unsigned int TX_BUFFER [1 + TRANSFER_CNT]; /* global word array */
oid TX_SSC (unsigned int, unsigned int, unsigned int); /* prototype def */
pragma global /* make tx_ssc useable for external C modules */
oid TX_SSC ( cmd, src, dest )
nsigned int cmd, src, dest; /* local variables, word type */
/* cmd = command to be transmitted */
/* dest = address of destination board */
if ( cmd == DIR_CHG ) /* command for remote board to toggle */
/* direction of running LEDs */
{
SRCP1 = (int) & TX_BUFFER [1];
/* PEC1 source is 1st word of transmit buffer array */
DSTP1 = (int) & SSCTB; /* PEC1 destination is SSC transmit buffer reg */
PECC1 = 0x400 + TRANSFER_CNT;
/* increment source address, transfer defined # of words */
SSCTIC = 0x79; /* SSC transmit interrupt now served by PEC1 */
}
SSCTB = TX_BUFFER [0] = HEADER | ( src << 8 ) | ( dest << 3 ) | cmd;
/* build transmit word with header, address and command */
/* and write it into SSC transmit register. */
/* In master mode the transmission starts instantly, in */
/* slave mode the transmission starts when the remote */
/* master is transmitting */
}
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