Renesas M16C/6N Manual de usuario descargar pdf (Pagina 24)

QDK™

M16C/Neutrino-NC30

www.state-machine.com/m16c

* b2 Reserved, set to 0

* b3 TXEPT Transmit register empty flag

* b4 CTS/RTS Disabled

* b5 NCH Data output select bit

* b6 CKPOL Clock polarity selected,TX falling edge,RX rising edge

* b7 UFORM MSB first

u2c0 = 0x10;

u2tb = u2rb; /* clear UART2 receive buffer by reading it */

u2tb = 0; /* clear UART2 transmit buffer */

/* 00000101 UART2 transmit/receive control register 1

* b0 TE Transmit Enable Bit

* b1 TI Transmit buffer empty flag,

* b2 RE Receive enable bit,

* b3 RI Receive complete flag,

* b4 U1IRS Transmit buffer empty select,

* b5 U1RRM Disable continous receive mode,

* b6:b7 Reserved, set to 0

u2c1 = 0x05;

(9) /* start the 16-bit Timer A, channel 1 to provide the time stamp for QS */

ta1mr = 0x40; /* Timer A1 in counter mode running from f8 */

ta1 = 0xFFFF; /* free-running down-counter */

ta1ic = 0; /* set interrutp priority (interrupt disabled) */

/* setup the QS filters... */

(10) QS_FILTER_ON(QS_ALL_RECORDS);

. . .

(11) return (uint8_t)1; /* indicate successfull QS initialization */

}

/*..........................................................................*/

(12) void QS_onCleanup(void) {

}

/*..........................................................................*/

(13) void QS_onFlush(void) {

uint16_t b;

while ((b =

QS_getByte()

) != QS_EOD) { /* next QS trace byte available? */

while (ti_u2c1 == 0) {

}

u2tb = b; /* stick the byte to the TX buffer */

}

/*..........................................................................*/

/* NOTE: invoked within a critical section (inetrrupts disabled) */

(14) QSTimeCtr QS_onGetTime(void) {

(15) if (ir_ta1ic != 0) { /* TimerA1 interrupt request set? */

(16) ++l_nTimerA1Underflows; /* account for 16-bit underflow (0->0xFFFF) */

(17) ir_ta1ic = 0; /* clear the interrupt flag */

}

/* subtract the Timer A1 counter, because it dounts DOWN */

(18) return ((uint32_t)l_nTimerA1Underflows << 16) - (uint32_t)ta1;

}

#endif /* Q_SPY */

Listing 11 QS implementation to send data out of the UART2serial port of the M16C

(1) The QS instrumentation is enabled only when the macro

Q_SPY

is defined

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Renesas M16C/6N Manual de usuario Pagina 24

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