#include <signal.h>
#include <io.h>
void usart_setup(void);
void adc_setup(void);
void adc_active(void) {
ADC12IE |= 0x0002;
ADC12CTL0 |= ENC+ADC12SC;
}
void adc_inactive(void) {
ADC12IE &= 0;
ADC12CTL0 &= 0xFFFF-(ENC+ADC12SC);
}
void u0Write(int len,char *buf) {
int i;
for(i=0; i < len; i++) {
while( (UTXIFG0 & IFG1) != UTXIFG0 ){ ; }
U0TXBUF = buf[i];
}
}
void u0WriteInt(int i) {
char *ptr;
while((UTXIFG0 & IFG1) != UTXIFG0 ){ ; }
ptr = (char *)&i;
U0TXBUF = ptr[0];
while((UTXIFG0 & IFG1) != UTXIFG0 ){ ; }
U0TXBUF = ptr[1];
}
void uWriteb0(unsigned char c) {
while( (UTXIFG0 & IFG1) != UTXIFG0 ){ ; }
U0TXBUF = c;
}
int Channel;
int main() {
/* Stop the WDT */
WDTCTL = WDTPW+WDTHOLD;
/* Clock Setup *
* SMCLK is 4Mhz */
_BIC_SR(OSCOFF);
BCSCTL1 = 0x04;
BCSCTL2 = SELS+DCOR;
/* Port Setup */
usart_setup();
adc_setup();
IE1 |= URXIE0;
_EINT();
P1SEL = 0x00;
P1DIR = 0x07;
P1OUT |= 0x02;
P1OUT &= 0x02;
P1OUT |= 0x04;
while(1) {
/* The Sleep loop */
}
return 0;
}
void adc_setup(void){
P6SEL = 0x07;
P6DIR = 0xF8;
ADC12CTL0 = 0x3390;
ADC12CTL1 = 0x0202;
ADC12MCTL0 = 0x00;
ADC12MCTL1 = 0x01;
ADC12MCTL2 = 0x82; /* Last in Chain */
}
void usart_setup(void) {
/* Uart Setup */
U0CTL = 0x01;
U0TCTL = 0x30;
UBR00=0x68; UBR10=0x00; UMCTL0=0x04;
ME1 |= UTXE0+URXE0;
U0CTL = 0x10;
P3SEL |= 0x30;
P3DIR |= 0x10;
}
interrupt (UART0RX_VECTOR) usart0_rx(void) {
char a = U0RXBUF;
if(a == 'X') {
/* Send X from ADC */
Channel = 1;
adc_active();
}
else if (a == 'Y') {
/* Send Y from ADC */
Channel = 2;
adc_active();
}
else if (a == 'Z') {
/* Send Z from ADC */
Channel = 3;
adc_active();
}
else if (a == 'A') {
/* Send All channels */
Channel = 0;
adc_active();
}
else if (a == 'T') {
uWriteb0('T');
}
else {
/* Unknown Command */
}
}
interrupt (ADC_VECTOR) adc12isr(void) {
int adcval;
if(Channel == 0) { /* All */
adcval = ADC12MEM0;
u0WriteInt(adcval);
adcval = ADC12MEM1;
u0WriteInt(adcval);
adcval = ADC12MEM2;
u0WriteInt(adcval);
}
else if (Channel == 1) { /* X */
adcval = ADC12MEM0;
u0WriteInt(adcval);
}
else if (Channel == 2) { /* Y */
adcval = ADC12MEM1;
u0WriteInt(adcval);
}
else if (Channel == 3) { /* Z */
adcval = ADC12MEM2;
u0WriteInt(adcval);
}
else {
/* Unknown Channel */
}
adc_inactive();
}
Arnd-Hendrik Mathias wrote:
Hi Del,
sounds somewhat funny, could you post the complete source file(s)?
Arnd-Hendrik
Delbert Martin IV wrote:
I think I know what happend but I don't know why.
I switches the order that the parameters were passed to the function
without changing the function definition. now the backwards variable
were actually in the order that i passed them (wrong). so i changed
the function definition to take the integer then the char * and it
worked!
why?
--Del
Delbert Martin IV wrote:
msp430-gcc (GCC) 3.3.4
Running under Linux.
I have a problem with the Parameter passing. I set up a function.
u0Write(char *buf, int len) {
...
}
I then set up some data to pass
char *addr = &ADC12MEM0;
int buflength = 2;
then I call the function
u0Write(addr,bufferlength);
I tell the debugger to break at u0Write;
the Debugger prints out the parameters passed:
Breakpoint 1, u0Write (buf=0x2 "\202 À", len=320)
well here is the problem 320 (decimal == 0x140) and 0x02 is the
value of the len parameter, looks like these are getting swapped
somehow? anyown know why?
--Del
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