Other Parts Discussed in Thread: MSP430FR6043
Tool/software:
I'm using a custom board with MSP430FR60431. Oscillator configuration:
-
8 MHz HF crystal for MCLK/SMCLK
-
32.768 kHz crystal for ACLK
-
8 MHz crystal for USSXTIN/USSXTOUT
I ported the FR6043_USSSWLib_template_example project for MSP430FR6043 to this board. Debug via Spy-Bi-Wire using CCS works fine. I can capture ultrasonic data and process it as expected.
Issue: After flashing the code and power cycling, the board does not boot.
Through testing, I found the problem occurs at:
code = USS_runAlgorithmsFixedPoint(config, &fixedResults);
If I comment this out, the board boots fine and the main loop runs. If left in, nothing happens post-reset — no LED, no LCD update, no UART. No watchdog reset either.
Any idea why USS_runAlgorithmsFixedPoint would hang only after flashing, but not during a debug session?
Thanks.
#ifdef __TI_COMPILER_VERSION__
int _system_pre_init(void)
#elif __IAR_SYSTEMS_ICC__
int __low_level_init(void)
#elif __GNUC__
extern int system_pre_init(void) __attribute__((constructor));
int system_pre_init(void)
#else
#error Compiler not supported!
#endif
{
/* Insert your low-level initializations here */
/* Disable Watchdog timer to prevent reset during */
/* int32_t variable initialization sequences. */
// Stop WDT
WDTCTL = WDTPW + WDTHOLD;
/*
* Configure CS module
* MCLK = 16 MHz from DCOCLK
* SMCLK = 8MHz from DCOCLK
* ACLK = LFXTCLK expected to have a 32.768 KHz
*/
// Unlock CS registers
CSCTL0_H = CSKEY >> 8;
#if (USS_PULSE_MODE == 2)
// Set DCO to 16MHz
CSCTL1 = DCORSEL | DCOFSEL_4;
// Configure wait states to be able to use 16 MHz MCLK
FRCTL0 = (FRCTLPW | NWAITS_2);
// Configure clock dividers all dividers
CSCTL3 = (DIVA__1 | DIVS__2 | DIVM__1);
#else
// Set DCO to 8MHz
CSCTL1 = DCORSEL | DCOFSEL_3;
// Configure clock dividers all dividers
CSCTL3 = (DIVA__1 | DIVS__1 | DIVM__1);
#endif
// Set SMCLK = MCLK = DCO, ACLK = LFXTCLK
CSCTL2 = SELA__LFXTCLK | SELS__DCOCLK | SELM__DCOCLK;
CSCTL4 |= (LFXTDRIVE_3);
CSCTL4 &= ~(LFXTOFF);
CSCTL0_H = 0;
// GPIO Configuration
PAOUT = 0;
PADIR = 0xFFFF;
PBOUT = 0;
PBDIR = 0xFFFF;
PCOUT = 0;
PCDIR = 0xFFFF;
PDOUT = 0;
PDDIR = 0xFFFF;
PEOUT = 0;
PEDIR = 0xFFFF;
#if APPLICATION_ENABLE_UART_DEBUG
// GPIO Configuration for UART mode
P1SEL0 |= (BIT2 | BIT3);
P1SEL1 &= ~(BIT2 | BIT3);
// Configure USCI_A0 for UART mode, 8-bit data, 1 stop bit
UCA1CTLW0 = UCSWRST; // Put eUSCI in reset
UCA1CTLW0 |= UCSSEL__SMCLK; // CLK = SMCLK
// For BRCLK = SMCLK = 8MHz, and Baud rate = 115200 (See UG)
UCA1BRW = 4;
// UCBRSx (bits 7-4) = 0x55, UCBRFx (bits 3-1) = 5, UCOS16 (bit 0) = 1
UCA1MCTLW = 0x5551;
UCA1CTLW0 &= ~UCSWRST; // release from reset
#endif
/*
* Configure LFXT GPIO pins and start
*/
PJSEL0 |= BIT4 | BIT5;
lcd_init();
// Timer_A0 setup for 0.5 ms interrupt
TA0CCR0 = 3999; // 0.5 ms at 8 MHz
TA0CCTL0 = CCIE; // Enable CCR0 interrupt
TA0CTL = TASSEL_2 | MC_1 | TACLR; // SMCLK, Up mode, clear TAR
P3DIR |= BIT1; // Set P3.1 as output
P3OUT &= ~BIT1; // Start with LED off
__enable_interrupt(); // Just enable global interrupts
PM5CTL0 &= ~LOCKLPM5;
/*==================================*/
/* Choose if segment initialization */
/* should be done or not. */
/* Return: 0 to omit initialization */
/* 1 to run initialization */
/*==================================*/
return(1);
}
void lcd_init(void)
{
//Initialize COMS pins and External bias resistor pins
P6SEL0 = (BIT4 | BIT5 | BIT6 | BIT7);
P6SEL1 = (BIT4 | BIT5 | BIT6 | BIT7);
// Initialize LCD segments 0 - 21;
LCDCPCTL0 = 0xFE63;
LCDCPCTL1 = 0x213F;
LCDCPCTL2 = 0x0003;
LCDCCTL0 = LCDDIV__1 | LCDPRE__16 | (LCDMX1+LCDMX0+LCDSON) | LCDLP;
LCDCMEMCTL = LCDCLRM; // Clear LCD memory
//Turn LCD on
LCDCCTL0 |= LCDON;
}
