Posted on May 17, 2011 at 11:55 Thank you for your fast reply.
I don't think the problem caused by the Watch Dog because the first lines of code is kill the WD and all Interrupt sources.
The code itself is at the end of my reply.
The Hardware I use is my own design but it is designed based on the DK3200 methodes.
The code is work for 1 to 4 seconds and the cpu commitsuicide or do nothing with full speed !!!
best regards
room
omry rotem
The code :
void TestSerial (void) {
char c = 'U';
SCON |= 0x02; // set TI in scon
while (1) {
if (SCON & 0x01) { // If RI in SCON
c = SBUF; // Get the char
SCON &= 0x0FE; // Clear RI in SCON
}
SCON &= 0xFD; // Clear TI in SCON
SBUF = c; // Xmit the Char
while ((SCON & 0x02) == 0); // Wait Loop till finished xmit of last char
WDRST = 0;
P3_2 = ~P3_2 ;
P3_3 = ~P3_2 ;
}
}
void main (void) {
unsigned int timer2_baud;
IE = 0;
IEA = 0;
EA = 0;
WDKEY = 0x55;
WDKEY = 0x55;
PWMCON = 0;
S1CON &= ~0x40;
S2CON &= ~0x40;
UADR &= ~0x80;
PSD8xx_reg.PMMR0.byte &= ~2; //.APD_ENABLE = 1;
PCON &= ~0x20;
T2CON = 0x34; // Use Timer 2 as baudrate generator
// This sets Uart1 to use timer2 baud rate
PCON |= 0x0C; // Set UART2 to user timer2 baud rate
timer2_baud = (65536L - ( (FREQ_OSC * 125L) / (4L * 19200L)));
RCAP2L = (timer2_baud & 0x00FF);
RCAP2H = (timer2_baud >>
;
SCON = 0x50; // enable first serial UART & receiver
SCON2 = 0x50; // enable 2nd uart
// EA = 1; // Enable global interrupt flag
TestSerial (); // uncomment this function to verify serial communication
