Tiva TM4C123GXL PWM configuration issue

Angelo Cirino said:

This makes me feel so stupid :(

Such feeling is unnecessary my friend - you are far, far, far from alone.  

The designer & implementer of that, "well known, vast expanse of missing highway" should absorb that feeling.   Inept roadsign markings (mice-type, non-bolded, too few manual alerts) are rarely noted - death toll rises - yet the trap continues its (duly noted) destruction...

Comfort/convenience works best when aimed at client/user - not vendor - who long has "known" yet (apparently) feels free to allow such issues to continue...

Hi Amit, that information is easy to forget. I gave up PF0 but the issue remains. My problem is that I am using a Boosterpack (Orbit by Digilent) that uses a lot of pins and left me with too little options. I created a side-project just to test the pins that were left for me to use.

Well, I changed the test code and only M0PWM0 is working:

int main(void) {
    MAP_SysCtlClockSet(SYSCTL_OSC_MAIN | SYSCTL_XTAL_16MHZ | SYSCTL_USE_PLL | SYSCTL_SYSDIV_4);

    MAP_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOB);
    MAP_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOF);

    MAP_SysCtlPWMClockSet(SYSCTL_PWMDIV_16);

    MAP_SysCtlPeripheralEnable(SYSCTL_PERIPH_PWM0);
    MAP_SysCtlPeripheralEnable(SYSCTL_PERIPH_PWM1);

    MAP_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOB);
    MAP_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOF);

    MAP_GPIOPinConfigure(GPIO_PB6_M0PWM0);
    MAP_GPIOPinTypePWM(GPIO_PORTB_BASE, GPIO_PIN_6);
    MAP_PWMGenConfigure(PWM0_BASE, PWM_GEN_0, PWM_GEN_MODE_UP_DOWN | PWM_GEN_MODE_NO_SYNC);
    MAP_PWMGenPeriodSet(PWM0_BASE, PWM_GEN_0, SERVO_PERIOD);
    MAP_PWMOutputState(PWM0_BASE, PWM_OUT_0_BIT, true);
    MAP_PWMGenEnable(PWM0_BASE, PWM_GEN_0);
    MAP_PWMPulseWidthSet(PWM0_BASE, PWM_OUT_0, SERVO_CENTER);

    MAP_GPIOPinConfigure(GPIO_PF1_M1PWM5);
    MAP_GPIOPinTypePWM(GPIO_PORTF_BASE, GPIO_PIN_5);
    MAP_PWMGenConfigure(PWM1_BASE, PWM_GEN_2, PWM_GEN_MODE_UP_DOWN | PWM_GEN_MODE_NO_SYNC);
    MAP_PWMGenPeriodSet(PWM1_BASE, PWM_GEN_2, SERVO_PERIOD);
    MAP_PWMOutputState(PWM1_BASE, PWM_OUT_5_BIT, true);
    MAP_PWMGenEnable(PWM1_BASE, PWM_GEN_2);
    MAP_PWMPulseWidthSet(PWM1_BASE, PWM_OUT_5, SERVO_CENTER);

    while (1);
}

Where is the error?

Angelo

cb1- said:

Inept roadsign markings (mice-type, non-bolded, too few manual alerts) are rarely noted - death toll rises - yet the trap continues its (duly noted) destruction...

Indeed I agree, that kind of information should be kept in every point where it is useful.

EDIT: Hi Amit, I corrected the assignment and now the PWM output is correct.

Thanx a lot.

Angelo