Renesas M16C/6N Manual de usuario descargar pdf (Pagina 23)

QDK™

M16C/Neutrino-NC30

www.state-machine.com/m16c

6 The Quantum Spy (QS) Instrumentation

This QDK demonstrates how to use the QS software tracing instrumentation to generate real-time

trace of a running QP application. Normally, the QS instrumentation is inactive and does not add

any overhead to your application, but you can turn the instrumentation on by defining the

Q_SPY

macro and recompiling the code.

QS is a software tracing facility built into all QP components and also available to the Application

code. QS allows you to gain unprecedented visibility into your application by selectively logging al-

most all interesting events occurring within state machines, the framework, the kernel, and your

application code. QS software tracing is minimally intrusive, offers precise time-stamping, sophisti-

cated runtime filtering of events, and good data compression (see Chapter 11 in PSiCC2 [PSiCC2]).

QS can be configured to send the trace data out of the serial port of the target device. On the

M16C/Neutrino baord, QS uses the built-in UART2 to send the trace data to the host. The QS plat-

form-dependent implementation is located in the file

bsp.c

and looks as follows:

(1) #ifdef Q_SPY

(2) #define QS_BUF_SIZE (2*256)

(3) #define QS_BAUD_RATE 115200

enum AppRecords { /* application-specific trace records */

PHILO_STAT = QS_USER

};

/* number of underflows of Timer A1 */

(4) static uint16_t l_nTimerA1Underflows = 1;

(5) uint8_t QS_onStartup(void const *arg) {

(6)

static uint8_t qsBuf[QS_BUF_SIZE]

; /* buffer for Quantum Spy */

uint16_t n;

(7)

QS_initBuf(qsBuf, sizeof(qsBuf))

;

/* UART0 configuration */

(8) /* UART2 configuration */

stac_u2smr2 = 1; /* enable UART2 */

pd7_0 = 1; /* set UART2 TX pin as output */

pd7_1 = 0; /* set UART2 RX pin as input */

/* set UART1 bit rate generator... */

/* bit rate can be calculated by:

* bit rate = ((BRG_count_source / 16)/baud_rate) - 1

* the value of BCLK does not affect BRG count source

u2brg = (uint8_t)(((f1_CLK_SPEED/16 + BAUD_RATE/2) / BAUD_RATE) - 1);

/* 00000101 8 bit, internal clock, 1 stop, no parity, no inversion

* b2:b0 SMD2:0 Selects Uart mode, 8 bit data transfer

* b3 CKDIR Internal clock selected

* b4 STPS One stop bit

* b5 PRY Odd parity (parity is disabled using b6)

* b6 PRYE Disable parity

* b7 Reserved, set to 0

u2mr = 0x05;

/* 00010000 MSB first, cmos output, CTS/RTS disabled, f1 clock source

* b1:b0 CLK1:0 Count source divided by 1

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