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Minor changes to variable names and comments
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1 changed files with 10 additions and 11 deletions
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@ -112,10 +112,10 @@ void SetupSpi(int mode)
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}
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//-----------------------------------------------------------------------------
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// Set up the synchronous serial port, with the one set of options that we
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// always use when we are talking to the FPGA. Both RX and TX are enabled.
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// Set up the synchronous serial port with the set of options that fits
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// the FPGA mode. Both RX and TX are always enabled.
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//-----------------------------------------------------------------------------
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void FpgaSetupSsc(uint8_t mode)
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void FpgaSetupSsc(uint8_t FPGA_mode)
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{
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// First configure the GPIOs, and get ourselves a clock.
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AT91C_BASE_PIOA->PIO_ASR =
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@ -136,7 +136,7 @@ void FpgaSetupSsc(uint8_t mode)
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// 8, 16 or 32 bits per transfer, no loopback, MSB first, 1 transfer per sync
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// pulse, no output sync
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if ((mode & 0xe0) == FPGA_MAJOR_MODE_HF_READER_RX_XCORR) {
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if ((FPGA_mode & 0xe0) == FPGA_MAJOR_MODE_HF_READER_RX_XCORR) {
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AT91C_BASE_SSC->SSC_RFMR = SSC_FRAME_MODE_BITS_IN_WORD(16) | AT91C_SSC_MSBF | SSC_FRAME_MODE_WORDS_PER_TRANSFER(0);
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} else {
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AT91C_BASE_SSC->SSC_RFMR = SSC_FRAME_MODE_BITS_IN_WORD(8) | AT91C_SSC_MSBF | SSC_FRAME_MODE_WORDS_PER_TRANSFER(0);
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@ -158,16 +158,15 @@ void FpgaSetupSsc(uint8_t mode)
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// ourselves, not to another buffer). The stuff to manipulate those buffers
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// is in apps.h, because it should be inlined, for speed.
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//-----------------------------------------------------------------------------
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bool FpgaSetupSscDma(uint8_t *buf, int len)
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bool FpgaSetupSscDma(uint8_t *buf, uint16_t sample_count)
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{
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if (buf == NULL) return false;
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AT91C_BASE_PDC_SSC->PDC_PTCR = AT91C_PDC_RXTDIS; // Disable DMA Transfer
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AT91C_BASE_PDC_SSC->PDC_RPR = (uint32_t) buf; // transfer to this memory address
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AT91C_BASE_PDC_SSC->PDC_RCR = len; // transfer this many frames
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AT91C_BASE_PDC_SSC->PDC_RCR = sample_count; // transfer this many samples
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AT91C_BASE_PDC_SSC->PDC_RNPR = (uint32_t) buf; // next transfer to same memory address
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AT91C_BASE_PDC_SSC->PDC_RNCR = len; // ... with same number of frames
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AT91C_BASE_PDC_SSC->PDC_PTCR = AT91C_PDC_RXTEN; // go!
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AT91C_BASE_PDC_SSC->PDC_RNCR = sample_count; // ... with same number of samples AT91C_BASE_PDC_SSC->PDC_PTCR = AT91C_PDC_RXTEN; // go!
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return true;
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}
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