Programming PIC32MM Family

[Pariston]

Hi,

I have some difficulties programming PIC32MM0064GPL020 (https://www.digikey.ca/en/products/detail/microchip-technology/PIC32MM0064GPL020-I-ML/6098453)

I am able to successfully program this mcu, but it doesn't seem to be working. The led is either barely on or off all the time. Also, I supply 3V from pickit, but only get 1.75V on the led.
 
I have a feeling I made a mistake with my configuration bits.

Code:


#ifdef __XC32
    #include <xc.h>          /* Defines special funciton registers, CP0 regs  */
#endif

// PIC32MM0064GPL020 Configuration Bit Settings

// 'C' source line config statements

// FDEVOPT
#pragma config SOSCHP = OFF             // Secondary Oscillator High Power Enable bit (SOSC oprerates in normal power mode.)
#pragma config USERID = 0xFFFF          // User ID bits (User ID bits)

// FICD
#pragma config JTAGEN = ON              // JTAG Enable bit (JTAG is enabled)
#pragma config ICS = PGx1               // ICE/ICD Communication Channel Selection bits (Communicate on PGEC1/PGED1)

// FPOR
#pragma config BOREN = BOR3             // Brown-out Reset Enable bits (Brown-out Reset enabled in hardware; SBOREN bit disabled)
#pragma config RETVR = OFF              // Retention Voltage Regulator Enable bit (Retention regulator is disabled)
#pragma config LPBOREN = ON             // Low Power Brown-out Enable bit (Low power BOR is enabled, when main BOR is disabled)

// FWDT
#pragma config SWDTPS = PS1048576       // Sleep Mode Watchdog Timer Postscale Selection bits (1:1048576)
#pragma config FWDTWINSZ = PS25_0       // Watchdog Timer Window Size bits (Watchdog timer window size is 25%)
#pragma config WINDIS = OFF             // Windowed Watchdog Timer Disable bit (Watchdog timer is in non-window mode)
#pragma config RWDTPS = PS1048576       // Run Mode Watchdog Timer Postscale Selection bits (1:1048576)
#pragma config RCLKSEL = LPRC           // Run Mode Watchdog Timer Clock Source Selection bits (Clock source is LPRC (same as for sleep mode))
#pragma config FWDTEN = ON              // Watchdog Timer Enable bit (WDT is enabled)

// FOSCSEL
#pragma config FNOSC = PRI            // Oscillator Selection bits (Low power RC oscillator (LPRC))
#pragma config PLLSRC = FRC             // System PLL Input Clock Selection bit (FRC oscillator is selected as PLL reference input on device reset)
#pragma config SOSCEN = OFF              // Secondary Oscillator Enable bit (Secondary oscillator (SOSC) is enabled)
#pragma config IESO = OFF               // Two Speed Startup Enable bit (Two speed startup is enabled)
#pragma config POSCMOD = OFF            // Primary Oscillator Selection bit (Primary oscillator is disabled)
#pragma config OSCIOFNC = OFF           // System Clock on CLKO Pin Enable bit (OSCO pin operates as a normal I/O)
#pragma config SOSCSEL = OFF            // Secondary Oscillator External Clock Enable bit (Crystal is used (RA4 and RB4 are controlled by SOSC))
#pragma config FCKSM = CSECME           // Clock Switching and Fail-Safe Clock Monitor Enable bits (Clock switching is enabled; Fail-safe clock monitor is enabled)

// FSEC
#pragma config CP = OFF                 // Code Protection Enable bit (Code protection is disabled)

// #pragma config statements should precede project file includes.
// Use project enums instead of #define for ON and OFF.
#define SYS_FREQ 25000000

#include <xc.h>

void delay_us(unsigned int us)
{
    // Convert microseconds us into how many clock ticks it will take
    us *= SYS_FREQ / 1000000 / 2; // Core Timer updates every 2 ticks

    _CP0_SET_COUNT(0); // Set Core Timer count to 0

    while (us > _CP0_GET_COUNT()); // Wait until Core Timer count reaches the number we calculated earlier
}

void delay_ms(int ms)
{
    delay_us(ms * 1000);
}

int32_t main(void)
{
    ANSELA = 0x00;
    ANSELB = 0x00;
    TRISA=0x00;
    TRISB=0x00;
    OSCCON = 0b00000010;
    PORTA=0x00;
    PORTB=0xFF;
    while(1)
    {
        PORTBbits.RB9 = 1;
        delay_ms(1000);
        PORTBbits.RB9 = 0;
        delay_ms(1000);
    }
   
   
    return 0;
}

Simplified circuit is attached. 130ohm resistor is used.

[m k]

I'd say that your delay is not waiting.