DEMO09S08QE8

DavidoBG — Mon, 18 May 2009 14:19:21 GMT

When I load and run following program with True Time Simulator & Real Time Debugger ther is no problem. The "Hello World" word appears in terminal windows. But when i reset my microprocessor with K6 system power connector, a specific caracters appears in my terminal windows instead of "Hello World"

Thanks for your help.

David

#define LED2 PTCD_PTCD0
unsigned int i;
unsigned char j;
// This is a simple string to serial function
void SCI_send_string(char *string)
{
while (*string)         // while the current char of the string is not null
{
    while (!SCIS1_TDRE); // wait for the transmit buffer to be empty
    SCID = *string;       // write the current char into the transmit buffer
    //for (i=0;i<512;i++){
    // for(j=0;j<255;j++)
    //        asm("nop");
    //}
    //LED2 = !LED2;         // toggle the led
    string++;             // increment the current char position within the string
}
}

void main(void)
{
char rxchar;

SOPT1_COPE = 0;
SOPT1_BKGDPE = 1;        // 1 = enable the debug pin | 0=disable debug pin
ICSC2_BDIV0 = 1;
ICSC2_BDIV1 = 0;

// SOPT1_BKGDPE = 1;

PTCDD_PTCDD0 = 1;       // PTC0 as an output

// Following a reset, BUSCLK = 4MHz
SCIBD = 26;             // SCI baud rate = 4MHz/(16*26)=9615 bps
SCIC2_TE = 1;      // enable the transmitter section
SCIC2_RE = 1;      // enable the transmitter section
SCI_send_string("Hello World!"); // write into the serial port ...

while(1)
{
    while (!SCIS1_RDRF); // wait for a new character to be received
    //while (!SCIS1_TDRE); // wait for the transmit buffer to be empty
    rxchar = SCID;        // read the received char
    SCID = rxchar;        // send the char back to the host PC
    LED2 = !LED2;         // toggle the led
    if (rxchar==13) SCI_send_string("\r\nHCS08 rules!\r\n");
}
}

Re: DEMO09S08QE8

fabio — Thu, 21 May 2009 04:04:46 GMT

Hello Davido,

You are not trimming the internal oscillator (and you should do it in order to have a more precise clock frequency). Remember that the BDM tool always adjust ICSTRM and ICSSC:FTRIM, but your application code must read the calibration data from FLASH (addresses 0xFFAE and 0xFFAF).

Best regards,

topic Re: DEMO09S08QE8 in 8-bit Microcontrollers

DEMO09S08QE8

Re: DEMO09S08QE8