Hello,
I am using the EZ430-RF2500 Development kit and I am trying to learn how to communicate from the chip to the computer. From what I deciphered, it is easiest to do this by using the UART method. However, I am running into a few bugs. I am running the standard "Hello World" tutorial code, but I am not getting any stimuli on my program. Do I need to download additional software to complete this process? I am currently using the IAR kickstarter software to program/debug my board. My future goal is to create a file and write/write-over data to it. Is this possible? I've tried looking for online tutorials for this situation but to this day I couldn't find any. If you know of some please let me know! Lastly, my code for the "Hello World" simulation is below.
#include "msp430x22x4.h"
const char string1[] = { "Hello World\r\n" };
unsigned int i;
void main(void)
{
WDTCTL = WDTPW + WDTHOLD; // Stop WDT
P1DIR = 0xFF; // All P1.x outputs
P1OUT = 0; // All P1.x reset
P2DIR = 0xFF; // All P2.x outputs
P2OUT = 0; // All P2.x reset
P3SEL = 0x30; // P3.4,5 = USCI_A0 TXD/RXD
P3DIR = 0xFF; // All P3.x outputs
P3OUT = 0; // All P3.x reset
P4DIR = 0xFF; // All P4.x outputs
P4OUT = 0; // All P4.x reset
UCA0CTL1 |= UCSSEL_1; // CLK = ACLK
UCA0BR0 = 0x03; // 32kHz/9600 = 3.41
UCA0BR1 = 0x00; //
UCA0MCTL = UCBRS1 + UCBRS0; // Modulation UCBRSx = 3
UCA0CTL1 &= ~UCSWRST; // **Initialize USCI state machine**
IE2 |= UCA0RXIE; // Enable USCI_A0 RX interrupt
__bis_SR_register(LPM3_bits + GIE); // Enter LPM3 w/ int until Byte RXed
}
#pragma vector=USCIAB0TX_VECTOR
__interrupt void USCI0TX_ISR(void)
{
UCA0TXBUF = string1[i++]; // TX next character
if (i == sizeof string1 - 1) // TX over?
IE2 &= ~UCA0TXIE; // Disable USCI_A0 TX interrupt
}
#pragma vector=USCIAB0RX_VECTOR
__interrupt void USCI0RX_ISR(void)
{
if (UCA0RXBUF == 'u') // 'u' received?
{
i = 0;
IE2 |= UCA0TXIE; // Enable USCI_A0 TX interrupt
UCA0TXBUF = string1[i++];
}
}
