Renesas M16C/6N Manual de usuario descargar pdf (Pagina 21)

QDK™

M16C/Neutrino-NC30

www.state-machine.com/m16c

/* initialize the clock... */

prc1 = 1; /* enable access to processor mode registers */

pm20 = 0; /* 2 wait states for SFR access for >16MHz operation... */

prc1 = 0; /* disable access to processor mode registers */

/* configure PLL, must be consistent with f1_CLK_HZ */

prc0 = 1; /* enable access to clock registers */

cm1 = 0x20; /* set to hi-drive Xin, divide by 1 */

cm0 = 0x08; /* set to main clock using divide by 1 */

cm21 = 0; /* switch to Xin */

plc0 = 0x12; /* configure PLL to x4 */

plc0 = 0x92; /* enable PLL */

for (delay = 20000; delay != 0; --delay) { /* wait for stable PLL */

}

cm11 = 1; /* switch to PLL */

prc0 = 0; /* disable access to clock registers */

/* enable the User LEDs */

// LED0_DDR = 1; /* pins used by UART2 */

// LED1_DDR = 1;

LED2_DDR = 1;

LED3_DDR = 1;

// LED0 = LED_OFF;

// LED1 = LED_OFF;

LED2 = LED_OFF;

LED3 = LED_OFF;

/* configure Switch pins as inputs... */

SW1_DDR = 0;

/* configure 32kHz sub clock..., see NOTE02 */

pd8_7 = 0; /* set GPIO to inputs (XCin/XCout) */

pd8_6 = 0;

prc0 = 1; /* unlock CM0 and CM1 */

cm04 = 1; /* start the 32KHz crystal */

prc0 = 0; /* lock the System Clock Control Register */

/* setup Timer A running from fc32... */

ta0mr = 0xC0; /* Timer mode, fc32, no pulse output */

ta0 = (int)((fc_CLK_HZ/32 + BSP_TICKS_PER_SEC/2)

/ BSP_TICKS_PER_SEC) - 1; /* period */

ta0ic = TICK_ISR_PRIO; /* set the clock tick interrupt priority level */

}

5.5 Starting Interrupts in QF_onStartup()

QP-nano invokes the

QF_onStartup()

callback just before starting the event loop inside

QF_run()

The

QF_onStartup()

function must start the interrupts configured earlier. In this BSP only the sys-

tem tick interrupt is started.

void QF_onStartup(void) {

ta0s = 1; /* Start timer A0 */

}

Listing 10 Configuring and enabling interrupts in the

QF_onStartup()

callback.

5.6 Assertion Handling Policy in Q_onAssert()

As described in Chapter 6 of [PSiCC2], all QP components use internally assertions to detect errors

in the way application is using the QP services. You need to define how the application reacts in

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