Other Parts Discussed in Thread: TMS320F28027
Hello,
I use C2000 Piccolo LaunchPad with TMS320F28027 MCU on it. I just want to toggle one pin and the following is my code.
void main(void){
while(1){
uiYLED++;
if(uiYLED==1){
GpioDataRegs.GPADAT.bit.GPIO0=1;
GpioDataRegs.GPADAT.bit.GPIO0=0;
GpioDataRegs.GPADAT.all=0xffff;
GpioDataRegs.GPADAT.all=0x0000;
uiYLED=0;
}
}
}
The following is my initialization function.
void Initialize(void){
// Initialize all the handles needed for this application
myClk=CLK_init((void *)CLK_BASE_ADDR, sizeof(CLK_Obj));
myCpu=CPU_init((void *)NULL, sizeof(CPU_Obj));
myFlash=FLASH_init((void *)FLASH_BASE_ADDR, sizeof(FLASH_Obj));
myGpio=GPIO_init((void *)GPIO_BASE_ADDR, sizeof(GPIO_Obj));
myPie=PIE_init((void *)PIE_BASE_ADDR, sizeof(PIE_Obj));
myPll=PLL_init((void *)PLL_BASE_ADDR, sizeof(PLL_Obj));
myPwm1=PWM_init((void *)PWM_ePWM1_BASE_ADDR, sizeof(PWM_Obj));
myPwm2=PWM_init((void *)PWM_ePWM2_BASE_ADDR, sizeof(PWM_Obj));
myPwm3=PWM_init((void *)PWM_ePWM3_BASE_ADDR, sizeof(PWM_Obj));
myAdc=ADC_init((void *)ADC_BASE_ADDR, sizeof(ADC_Obj));
myWDog=WDOG_init((void *)WDOG_BASE_ADDR, sizeof(WDOG_Obj));
mySpi=SPI_init((void *)SPIA_BASE_ADDR, sizeof(SPI_Obj));
myCap=CAP_init((void *)CAPA_BASE_ADDR, sizeof(CAP_Obj));
myPwr=PWR_init((void *)PWR_BASE_ADDR, sizeof(PWR_Obj));
myTimer0=TIMER_init((void *)TIMER0_BASE_ADDR, sizeof(TIMER_Obj));
// Perform basic system initialization
WDOG_disable(myWDog);
CLK_enableAdcClock(myClk);
(*Device_cal)();
// Select the internal oscillator 1 as the clock source
CLK_setOscSrc(myClk, CLK_OscSrc_Internal);
// Setup the PLL for x12 / 2 which will yield 120Mhz = 10Mhz * 12 / 2 (CPUCLK=60MHz)
PLL_setup(myPll, PLL_Multiplier_12, PLL_DivideSelect_ClkIn_by_2);
CLK_setLowSpdPreScaler(myClk, CLK_LowSpdPreScaler_SysClkOut_by_1);
CLK_setClkOutPreScaler(myClk, CLK_ClkOutPreScaler_SysClkOut_by_1);
// Disable the PIE and all interrupts
PIE_disable(myPie);
PIE_disableAllInts(myPie);
CPU_disableGlobalInts(myCpu);
CPU_clearIntFlags(myCpu);
// If running from flash copy RAM only functions to RAM
#ifdef _FLASH
memcpy(&RamfuncsRunStart, &RamfuncsLoadStart, (size_t)&RamfuncsLoadSize);
#endif
// Enable XCLOCKOUT to allow monitoring of oscillator 1
GPIO_setMode(myGpio, GPIO_Number_18, GPIO_18_Mode_XCLKOUT);
CLK_setClkOutPreScaler(myClk, CLK_ClkOutPreScaler_SysClkOut_by_1);
// Setup a debug vector table and enable the PIE
PIE_setDebugIntVectorTable(myPie);
PIE_enable(myPie);
}
On the scope when I see GPIO0 it is 1 for about 480ns and goes to zero in 30ns and the 1 for about 480ns. It keeps continue doing that because it is in a while loop.
My question is how can I get faster toggling? Is there any PLL or clock initialization that I missed?
I appreciate any help.
Ali
