1- I got a board with dip-switches. How do they work? What do they use for?
2- I'm tring to do a c# interface to change baud rate of msp430 but it
does not work properly. I got a blinking led to see if it works fine. The
problem is, when i change baud rate, led stops blinkind. When I set change
it back to initial baud rate, led starts blinking again
Code:
#include <msp430x16x.h>
void checkMes (char );
void delay(); // delay
void blinker(); // blink led
char message; // check received data
volatile unsigned int delm=1; // # of delays
volatile int t=0; // led's not blinking when it is 0
volatile int m=0;
volatile int baud; // msp430 baud speed
void main(void)
{
WDTCTL = WDTPW + WDTHOLD; // Stop WDT
P3SEL |= 0xC0; // P3.6,7 = USART1 option select
ME2 |= UTXE1 + URXE1; // Enable USART1 TXD/RXD
UCTL1 |= CHAR; // 8-bit character
UTCTL1 |= SSEL0; // UCLK = ACLK
UBR01 = 0x0D; // 32k/2400 - 13.65
UBR11 = 0x00;
UMCTL1 = 0x6B; // Modulation
UCTL1 &= ~SWRST; // Initialize USART state machine
IE2 |= URXIE1; // Enable USART1 RX interrupt
P1DIR |=BIT0;
P1OUT =~BIT0;
// Mainloop
for(;;){
_BIS_SR(LPM3_bits + GIE);
#if 1
while (!(IFG2 & UTXIFG1)); // USART1 TX buffer ready?
TXBUF1 = message;
#endif
while (t==0){
// Enter LPM3 w/interrupt
checkMes (message); //check command message coming from interface
while (t==1)
blinker(); //start blinking the light
}
}
}
#if 1
// UART1 RX ISR will for exit from LPM3 in Mainloop
#pragma vector= USART1RX_VECTOR
__interrupt void usart1_rx (void)
{
_BIC_SR_IRQ( LPM3_bits) ;// Clear LPM3 bits from 0(SR)
t=0;
message=RXBUF1;
}
#endif
void delay() //changes the blinking speed of led
{
unsigned int i;
i=10000;
while(i>0)
i--;
}
void blinker () // blinks led
{
while (t==1){
int i=delm;
P1OUT ^=BIT0;
while (i>0) // waits for delay
{
i--;
delay();
}
}
}
void checkMes (char m)
{
char c2;
int com;
if ((m & 0x80) == 0x80) //Check if it is blink command
{
if ((m & 0x10) == 0x10){ //check if it is blink button
t=1;
blinker();
}
else // # of delays
{
c2=(m & 0x07);
delm=c2;
t=1;
}
}
else // it is configuration
{
t=2;
com = (m & 0x03); //check baud rate
switch(com){
case '1': // set baud rate 2400
IE2=0x00;
ME2=0x00;
UCTL1=0x01; // Software reset
UCTL1 |= CHAR; // 8-bit character
UTCTL1 |= SSEL0; // UCLK = ACLK
UBR01=0x0D;
UBR11=0x00;
UMCTL1=0x6B;
ME2 |= UTXE1 + URXE1; // Enable USART1 TXD/RXD
UCTL1 &= ~SWRST; // Initialize USART state machine
IE2 |= URXIE1; // Enable USART1 RX interrupt
baud=6;
break;
case '2': // set baud rate 4800
IE2=0x00;
ME2=0x00;
UCTL1=0x01; // Software reset
UCTL1 |= CHAR; // 8-bit character
UTCTL1 |= SSEL0; // UCLK = ACLK
UBR01=0x06;
UBR11=0x00;
UMCTL1=0x77;
ME2 |= UTXE1 + URXE1; // Enable USART1 TXD/RXD
UCTL1 &= ~SWRST; // Initialize USART state machine
IE2 |= URXIE1; // Enable USART1 RX interrupt
baud=7;
break;
case '3': // set baud rate 9600
IE2=0x00;
ME2=0x00;
UCTL1=0x01; // Software reset
UCTL1 |= CHAR; // 8-bit character
UTCTL1 |= SSEL0; // UCLK = ACLK
UBR01=0x03;
UBR11=0x00;
UMCTL1=0x29;
ME2 |= UTXE1 + URXE1; // Enable USART1 TXD/RXD
UCTL1 &= ~SWRST; // Initialize USART state machine
IE2 |= URXIE1; // Enable USART1 RX interrupt
baud=8;
break;
default:
break;
}
}
}
help with msp 430 interface and dip-switches
Started by ●November 28, 2007
Reply by ●November 28, 20072007-11-28
"bcincin" <berkecincin@gmail.com> wrote in message news:QsSdnYq1dOXJodDanZ2dnUVZ_o-mnZ2d@giganews.com...> 1- I got a board with dip-switches. How do they work?Voodoo?> What do they use for?They are used primarily to put oil into the ash tray. -- Regards, Richard. + http://www.FreeRTOS.org 14 official architecture ports, 1000 downloads per week. + http://www.SafeRTOS.com Certified by T�V as meeting the requirements for safety related systems.
Reply by ●November 28, 20072007-11-28
bcincin wrote:> 2- I'm tring to do a c# interface to change baud rate of msp430 but it > does not work properly. I got a blinking led to see if it works fine. The > problem is, when i change baud rate, led stops blinkind. When I set change > it back to initial baud rate, led starts blinking againJust a wild guess, but I would imagine your code never advances beyond this line:> while (!(IFG2 & UTXIFG1)); // USART1 TX buffer ready?The reason *may* be that you did not follow the initialization sequence for the USART correctly with regard to the SWRST bit. Check the docs. There is a required sequence that will otherwise result in "unpredictable" behavior. -- Michael N. Moran (h) 770 516 7918 5009 Old Field Ct. (c) 678 521 5460 Kennesaw, GA, USA 30144 http://mnmoran.org "So often times it happens, that we live our lives in chains and we never even know we have the key." "Already Gone" by Jack Tempchin (recorded by The Eagles) The Beatles were wrong: 1 & 1 & 1 is 1
Reply by ●November 28, 20072007-11-28
On 2007-11-28, bcincin <berkecincin@gmail.com> wrote:> 1- I got a board with dip-switches. How do they work?When closed, they allow current to flow through them. When open, they don't.> What do they use for?To turn current on/off.> 2- I'm tring to do a c# interface to change baud rate of msp430 but it > does not work properly. I got a blinking led to see if it works fine. The > problem is, when i change baud rate, led stops blinkind. When I set change > it back to initial baud rate, led starts blinking again > > Code:Your code is 1) Too long. People are willing to look at a short program to help you with a specific problem. If you just post a 100+ lines of code and ask "what's wrong with my program?" you're not going to get very good results. 2) A mess. The random indentation and brace placement make it impossible to read. Most of us won't try to help until you put in a little effort to make it easy for us. If you want help, post a smaller, well-formatted program that doesn't work. The program needs to be as small as possible but still demonstrate the problem. You might want to read this: http://www.catb.org/~esr/faqs/smart-questions.html -- Grant Edwards grante Yow! I wonder if I should at put myself in ESCROW!! visi.com
