optimization UDOL creation. does not affect on functionality.

[proxmark3-svn] / armsrc / hfsnoop.c

#include "proxmark3.h"
#include "apps.h"
#include "BigBuf.h"
#include "util.h"
#include "usb_cdc.h"    // for usb_poll_validate_length

static void RAMFUNC optimizedSnoop(void);

static void RAMFUNC optimizedSnoop(void)
{
        int n = BigBuf_max_traceLen() / sizeof(uint16_t); // take all memory

        uint16_t *dest = (uint16_t *)BigBuf_get_addr();
        uint16_t *destend = dest + n;

        AT91C_BASE_SSC->SSC_RFMR = SSC_FRAME_MODE_BITS_IN_WORD(16); // Setting Frame mode, 16 bits per word
        // Reading data loop
        while(dest <= destend)
        {
                if(AT91C_BASE_SSC->SSC_SR & AT91C_SSC_RXRDY)
                {
                        *dest = (uint16_t)(AT91C_BASE_SSC->SSC_RHR);
                        dest++;
                }
        }
        //Resetting Frame mode (First set in fpgaloader.c)
        AT91C_BASE_SSC->SSC_RFMR = SSC_FRAME_MODE_BITS_IN_WORD(8) | AT91C_SSC_MSBF | SSC_FRAME_MODE_WORDS_PER_TRANSFER(0);
}

void HfSnoop(int samplesToSkip, int triggersToSkip)
{
        BigBuf_free(); BigBuf_Clear();
        
        Dbprintf("Skipping first %d sample pairs, Skipping %d triggers.\n", samplesToSkip, triggersToSkip);
        int trigger_cnt;
        LED_D_ON();
        // Select correct configs
        FpgaDownloadAndGo(FPGA_BITSTREAM_HF);
        // Set up the synchronous serial port
        FpgaSetupSsc();
        // connect Demodulated Signal to ADC:
        SetAdcMuxFor(GPIO_MUXSEL_HIPKD);
        FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_SNOOP);
        SpinDelay(100);

        AT91C_BASE_SSC->SSC_RFMR = SSC_FRAME_MODE_BITS_IN_WORD(16); // Setting Frame Mode For better performance on high speed data transfer.

        trigger_cnt = 0;
        uint16_t r = 0;
        while(!BUTTON_PRESS() && !usb_poll_validate_length()) {
                WDT_HIT();
                if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_RXRDY)) {
                        r = (uint16_t)AT91C_BASE_SSC->SSC_RHR;
                        r = MAX(r & 0xff, r >> 8); 
                        if (r >= 240) {
                                if (++trigger_cnt > triggersToSkip)
                                        break;
                        } 
                }
        }

        if(!BUTTON_PRESS()) {
                int waitcount = samplesToSkip; // lets wait 40000 ticks of pck0
                while(waitcount != 0) {
                        if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_RXRDY))
                                waitcount--;
                }
                optimizedSnoop();
                Dbprintf("Trigger kicked! Value: %d, Dumping Samples Hispeed now.", r);
        }

        DbpString("HF Snoop end");
        FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
        LED_D_OFF();
}