Hello forum,
i implemented the uPP-example given from this forum.
Now i want to monitor results via Tools-> Graph.
Converted is a sine wave with ~200kHz, clock is 2.5 MHz. (parameters will be adjusted later)
in the .cfg-File i added a line "Program.sectMap["uPPrcv_1"] = "L2SRAM" ", i also can link this section to "DDR3", results are the same.
Parameters are:
#define xferSize (8192) // max: 8192
#define lineCnt (1) // note: xferSize should be evenly divisible by lineCnt.
#pragma DATA_SECTION(rcvBuffer_1,".far:uPPrcv_1");
#pragma DATA_ALIGN(rcvBuffer_1,64);
int16_t rcvBuffer_1[xferSize];
// init regs: CTL, ICR, IVR, TCR
uPP = uppDevParams_DEFAULT;
uPP.A.direction = UPP_DIR_RCV;
uPP.A.dataRate = UPP_DR_SDR;
uPP.A.dataWidthVal = dataWidth; <----- 16
uPP.A.idleValueVal = 0xAAAA;
uPP.A.clkDivVal = 0x1; // use clock div between 0 and 0xF
uPP.A.rcvThresh = UPP_TT_256B;
uPP.A.useStart=0;
uPP.A.useEnable=0;
uPP.A.dataPacking=UPP_DP_LJUST_0FILL;
uPP.A.dataWidthVal=15;
while(1)
{
gpioClearOutput(GPIO_15); /*enable external Clock*/
CSL_FINST(uppRegs->UPPCR, UPP_UPPCR_EN, DISABLE);
upp_dma_prog(UPP_DMA_CHAN_I, (void *)rcvBuffer_1, lineCnt, ((xferSize / lineCnt)), NULL);
/*here i clear all interupt flags because they were set all the time*/
CSL_FINST(uppRegs->UPIER,UPP_UPISR_EOWQ,TRUE); /*Clear end-of-Window Flag channel Q*/
CSL_FINST(uppRegs->UPIER,UPP_UPISR_EOWI,TRUE); /*Clear end-of-Window Flag channel I*/
CSL_FINST(uppRegs->UPIER,UPP_UPISR_EOLI,TRUE); /*Clear end-of-line Flag channel I*/
CSL_FINST(uppRegs->UPIER,UPP_UPISR_EOLQ,TRUE); /*Clear end-of-line Flag channel Q*/
CSL_FINST(uppRegs->UPPCR, UPP_UPPCR_EN, ENABLE);
do{
intStatus = uppRegs->UPIER;
}while (!(intStatus & upp_int_EOWI));
gpioSetOutput(GPIO_15);/*Disable external Clock-Generation*/
}
Normally i would expect a continous blue pattern in the figure below, but i only see this :
When i change the amplitude of the input signal, i also can see these changes in the above y-axis.
My question is:
Why do i have intermissionsin between the sinus-signal?
Thanks in advance for any answer.
Regards Martin
