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libgpiodJtagBitbang: add support for XVC server #528

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Merged
trabucayre merged 1 commit into from
Mar 10, 2025
Merged

libgpiodJtagBitbang: add support for XVC server #528

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24 changes: 24 additions & 0 deletions src/libgpiodJtagBitbang.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -343,3 +343,27 @@ int LibgpiodJtagBitbang::toggleClk(uint8_t tms, uint8_t tdi, uint32_t clk_len)

return clk_len;
}

bool LibgpiodJtagBitbang::writeTMSTDI(const uint8_t *tms, const uint8_t *tdi, uint8_t *tdo,
uint32_t len)
{
memset(tdo, 0, (len+7) / 8);

for (uint32_t i = 0; i < len; i++) {
#ifdef GPIOD_APIV2
gpiod_line_value tdix = (tdi[i >> 3] & (1 << (i & 7))) ? GPIOD_LINE_VALUE_ACTIVE : GPIOD_LINE_VALUE_INACTIVE;
gpiod_line_value tmsx = (tms[i >> 3] & (1 << (i & 7))) ? GPIOD_LINE_VALUE_ACTIVE : GPIOD_LINE_VALUE_INACTIVE;
update_pins(tmsx, tdix);
#else
int tdix = (tdi[i >> 3] & (1 << (i & 7))) ? 1 : 0;
int tmsx = (tms[i >> 3] & (1 << (i & 7))) ? 1 : 0;

update_pins(0, tmsx, tdix);
update_pins(1, tmsx, tdix);
#endif
if (read_tdo() > 0)
tdo[i >> 3] |= 1 << (i & 7);
}

return true;
}
2 changes: 2 additions & 0 deletions src/libgpiodJtagBitbang.hpp
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Expand Up @@ -36,6 +36,8 @@ class LibgpiodJtagBitbang : public JtagInterface {
int writeTMS(const uint8_t *tms_buf, uint32_t len, bool flush_buffer, const uint8_t tdi = 1) override;
int writeTDI(const uint8_t *tx, uint8_t *rx, uint32_t len, bool end) override;
int toggleClk(uint8_t tms, uint8_t tdo, uint32_t clk_len) override;
bool writeTMSTDI(const uint8_t *tms, const uint8_t *tdi, uint8_t *tdo,
uint32_t len) override;

int get_buffer_size() override { return 0; }
bool isFull() override { return false; }
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8 changes: 8 additions & 0 deletions src/xvc_server.cpp
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Expand Up @@ -14,6 +14,9 @@
#include <stdexcept>

#include "ftdiJtagMPSSE.hpp"
#ifdef ENABLE_LIBGPIOD
#include "libgpiodJtagBitbang.hpp"
#endif
#include "cable.hpp"
#include "display.hpp"

Expand All @@ -36,6 +39,11 @@ XVC_server::XVC_server(int port, const cable_t & cable,
_jtag = new FtdiJtagMPSSE(cable, dev, serial, clkHZ,
invert_read_edge, _verbose);
break;
#ifdef ENABLE_LIBGPIOD
case MODE_LIBGPIOD_BITBANG:
_jtag = new LibgpiodJtagBitbang(pin_conf, dev, clkHZ, verbose);
break;
#endif
#if 0
case MODE_ANLOGICCABLE:
_jtag = new AnlogicCable(clkHZ);
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