Hi,
i've ported a project from iar 1.26 to mspgcc and it can be compiled without
warnings/errors but it does not work correct; the timerb1 irqs are missing.
Therefore the wait function (wait_while_not_50ms) waits forever:
-------------------------------------------------------------------
# MSP430F149 hello world program with timerb1 based LED timing
#include <io.h>
#include <signal.h>
static volatile unsigned int ui_wait_counter1;
// Wait as long 50 ms are not completed.
void
wait_while_not_50ms (void) ///////// IAR: works, MSPGCC: Waits
forever!!!!!!!!!!!!!!!!!!!!!!!!!!!!!1
{
while (ui_wait_counter1);
}
extern inline
interrupt (TIMERA0_VECTOR)
timer_a0 (void)
{
}
extern inline
interrupt (TIMERA1_VECTOR)
timer_a1 (void)
{
}
extern inline
interrupt (TIMERB0_VECTOR)
timer_b0 (void)
{
}
extern inline
interrupt (TIMERB1_VECTOR)
timer_b1 (void)
{
switch (TBIV)
{
case 2: // (TB1) Capture
break;
case 4: // (TB2) Capture
break;
case 6: // (TB3) Capture
break;
case 8: // (TB4) Capture
break;
case 10: // (TB5) Compare
break;
case 12: // (TB6) Compare
break;
case 14: // Timer overflow. Every 10.3 ms with 8 MHz
quartz.
TACTL &= ~0x0006; // TACTL : Interrupt overflow not set
if (ui_wait_counter1) // count down
ui_wait_counter1--;
break;
default:
break;
}
P1OUT = ~P1OUT; // toggle
return;
}
int
main (void)
{
static volatile unsigned char uc_250ms_old;
P1DIR = 0xFF; //port 1 = output
WDTCTL = WDTPW + WDTHOLD; // Stop WDT
WDTCTL = 0x5a1d; // WD as Timer : 250.0ms; Timer=ACLK 0x5a1d
BCSCTL1 &= ~XT2OFF; // XT2on
do // wait for MCLK from quartz
{
IFG1 &= ~OFIFG; // Clear OSCFault flag
for (uc_250ms_old = 0; uc_250ms_old < 0xff; uc_250ms_old++); // Time
(approx. 3 ms) for flag to set
}
while (IFG1 & OFIFG); // OSCFault flag still set?
BCSCTL1 = 0x07; // LFXT1: XT2on: LF quartz for MCLK, divide by
1, XT5V
BCSCTL2 = SELM1 + SELS; // LFXT2: use HF quartz (XT2), internal
resistor on, divide by one, MCLK = SMCLK = XT2 (safe)
TACTL = 0x0210; // TACTL : Interrupt overflow not set;
// Timer counts up to CCR0; CLK= 1:1 SMCLK
// description : page 10-25
TBCTL = 0x0256; // TBCTL : Interrupt overflow not set;
// Timer counts up to CCR0; CLK= 1:2 SMCLK
// Counter length 16 Bit; TBLCGRP is for one
// description : page 10-25
TBCCR0 = 41430; // load 100Hz counter into timer
TBCCTL0 = 0x0080;
TBCCTL1 = 0x8114; // asynchronous capture; negative edge
sensitive
TBCCTL2 = 0xc914;
TBCCTL3 = 0xc914;
TBCCTL4 = 0x8104; // set Compare mode and set mode to OUTX
TBCCTL5 = 0x0200;
TBCCTL6 = 0x0204; // description : page 11-32
ui_wait_counter1 = 5; // Initialize the count down timer with 5
(cycles of 10,3 ms with 8 MHz quartz, 17 ms without quartz.).
for (;;)
{ //infinite loop
P1OUT = ~P1OUT; //invert port 1
wait_while_not_50ms (); //call delay function
}
return 0;
}
--------------------------------------------------------------
Any ideas?
Another problem is gcrt0.S: Sometimes DDD reports that this file is empty or
things like "line number 37 out of range, gcrt0.S has 1 lines". What does this
mean?
And DDD often does not show the code where the program has been interrupted. Is
this the usual behavior?
Rolf F.
