FPGA changes (#803)

[proxmark3-svn] / armsrc / fpgaloader.c

diff --git a/armsrc/fpgaloader.c b/armsrc/fpgaloader.c
index a132b762e406e12a2018f0279ea61cc0dba417b0..214f484366ae05f82d8ce18ae3031c13a7c130a0 100644 (file)
--- a/armsrc/fpgaloader.c
+++ b/armsrc/fpgaloader.c
@@ -130,21 +130,21 @@ void FpgaSetupSsc(uint8_t FPGA_mode)
        // Now set up the SSC proper, starting from a known state.
        AT91C_BASE_SSC->SSC_CR = AT91C_SSC_SWRST;
 
-       // RX clock comes from TX clock, RX starts when TX starts, data changes
-       // on RX clock rising edge, sampled on falling edge
+       // RX clock comes from TX clock, RX starts on Transmit Start,
+       // data and frame signal is sampled on falling edge of RK
        AT91C_BASE_SSC->SSC_RCMR = SSC_CLOCK_MODE_SELECT(1) | SSC_CLOCK_MODE_START(1);
 
        // 8, 16 or 32 bits per transfer, no loopback, MSB first, 1 transfer per sync
        // pulse, no output sync
-       if ((FPGA_mode & 0xe0) == FPGA_MAJOR_MODE_HF_READER_RX_XCORR) {
+       if ((FPGA_mode & 0xe0) == FPGA_MAJOR_MODE_HF_READER) {
                AT91C_BASE_SSC->SSC_RFMR = SSC_FRAME_MODE_BITS_IN_WORD(16) | AT91C_SSC_MSBF | SSC_FRAME_MODE_WORDS_PER_TRANSFER(0);
        } else {
                AT91C_BASE_SSC->SSC_RFMR = SSC_FRAME_MODE_BITS_IN_WORD(8) | AT91C_SSC_MSBF | SSC_FRAME_MODE_WORDS_PER_TRANSFER(0);
        }               
 
        // TX clock comes from TK pin, no clock output, outputs change on falling
-       // edge of TK, sample on rising edge of TK, start on positive-going edge of sync
-       AT91C_BASE_SSC->SSC_TCMR = SSC_CLOCK_MODE_SELECT(2) |   SSC_CLOCK_MODE_START(5);
+       // edge of TK, frame sync is sampled on rising edge of TK, start TX on rising edge of TF
+       AT91C_BASE_SSC->SSC_TCMR = SSC_CLOCK_MODE_SELECT(2) | SSC_CLOCK_MODE_START(5);
 
        // tx framing is the same as the rx framing
        AT91C_BASE_SSC->SSC_TFMR = AT91C_BASE_SSC->SSC_RFMR;
@@ -166,8 +166,8 @@ bool FpgaSetupSscDma(uint8_t *buf, uint16_t sample_count)
        AT91C_BASE_PDC_SSC->PDC_RPR = (uint32_t) buf;           // transfer to this memory address
        AT91C_BASE_PDC_SSC->PDC_RCR = sample_count;             // transfer this many samples
        AT91C_BASE_PDC_SSC->PDC_RNPR = (uint32_t) buf;          // next transfer to same memory address
-       AT91C_BASE_PDC_SSC->PDC_RNCR = sample_count;            // ... with same number of samples      AT91C_BASE_PDC_SSC->PDC_PTCR = AT91C_PDC_RXTEN;         // go!
-
+       AT91C_BASE_PDC_SSC->PDC_RNCR = sample_count;            // ... with same number of samples
+       AT91C_BASE_PDC_SSC->PDC_PTCR = AT91C_PDC_RXTEN;         // go!
        return true;
 }
 
@@ -417,8 +417,10 @@ void FpgaDownloadAndGo(int bitstream_version)
        uint8_t output_buffer[OUTPUT_BUFFER_LEN] = {0x00};
        
        // check whether or not the bitstream is already loaded
-       if (downloaded_bitstream == bitstream_version)
+       if (downloaded_bitstream == bitstream_version) {
+               FpgaEnableTracing();
                return;
+       }
 
        // make sure that we have enough memory to decompress
        BigBuf_free(); BigBuf_Clear_ext(false); 
@@ -454,16 +456,30 @@ void FpgaSendCommand(uint16_t cmd, uint16_t v)
        while ((AT91C_BASE_SPI->SPI_SR & AT91C_SPI_TXEMPTY) == 0);              // wait for the transfer to complete
        AT91C_BASE_SPI->SPI_TDR = AT91C_SPI_LASTXFER | cmd | v;         // send the data
 }
+
 //-----------------------------------------------------------------------------
 // Write the FPGA setup word (that determines what mode the logic is in, read
 // vs. clone vs. etc.). This is now a special case of FpgaSendCommand() to
 // avoid changing this function's occurence everywhere in the source code.
 //-----------------------------------------------------------------------------
-void FpgaWriteConfWord(uint8_t v)
+void FpgaWriteConfWord(uint16_t v)
 {
        FpgaSendCommand(FPGA_CMD_SET_CONFREG, v);
 }
 
+//-----------------------------------------------------------------------------
+// enable/disable FPGA internal tracing
+//-----------------------------------------------------------------------------
+void FpgaEnableTracing(void)
+{
+       FpgaSendCommand(FPGA_CMD_TRACE_ENABLE, 1);
+}
+
+void FpgaDisableTracing(void)
+{
+       FpgaSendCommand(FPGA_CMD_TRACE_ENABLE, 0);
+}
+
 //-----------------------------------------------------------------------------
 // Set up the CMOS switches that mux the ADC: four switches, independently
 // closable, but should only close one at a time. Not an FPGA thing, but