Changeset 575 for trunk/modules/vci_spi/caba/source
- Timestamp:
- Nov 17, 2013, 4:02:23 PM (11 years ago)
- File:
-
- 1 edited
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trunk/modules/vci_spi/caba/source/src/vci_spi.cpp
r565 r575 633 633 break; 634 634 case S_XMIT: 635 { 636 bool s_clk_sample = r_spi_clk ^ r_ctrl_cpha; 635 637 p_spi_clk = r_spi_clk ^ r_ctrl_cpol; 636 p_spi_mosi = r_spi_out; 637 break; 638 if (s_clk_sample == 0) { 639 // clock low: get data directly from shift register 640 // as r_spi_out may be delayed by one clock cycle 641 p_spi_mosi = (r_txrx[(r_ctrl_char_len -1)/ 64] >> ((r_ctrl_char_len - 1) % 64)) & (uint64_t)0x0000000000000001ULL; 642 } else { 643 // clock high: get data from saved value, as the shift register 644 // may have changed 645 p_spi_mosi = r_spi_out; 646 } 647 break; 648 } 638 649 } 639 650
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