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openFPGALoader
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Bugfix to allow NULL tx pointer 

Also set the _clkHZ variable which is needed for timing operations
such as erase.
This commit is contained in:
Niklas Ekström 2022-06-24 20:34:44 +02:00
parent 12955b8711
commit 8d920d7ed0
1 changed files with 7 additions and 3 deletions
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8
src/libgpiodJtagBitbang.cpp
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@ -83,6 +83,10 @@ LibgpiodJtagBitbang::LibgpiodJtagBitbang(
_curr_tdi = 0; _curr_tdi = 0;
_curr_tck = 0; _curr_tck = 0;
_curr_tms = 1; _curr_tms = 1;
// FIXME: I'm unsure how this value should be set.
// Maybe experiment, or think through what it should be.
_clkHZ = 5000000;
} }
LibgpiodJtagBitbang::~LibgpiodJtagBitbang() LibgpiodJtagBitbang::~LibgpiodJtagBitbang()
@ -191,16 +195,16 @@ int LibgpiodJtagBitbang::writeTDI(uint8_t *tx, uint8_t *rx, uint32_t len, bool e
if (end && (i == len - 1)) if (end && (i == len - 1))
tms = 1; tms = 1;
if (tx)
tdi = (tx[i >> 3] & (1 << (i & 7))) ? 1 : 0; tdi = (tx[i >> 3] & (1 << (i & 7))) ? 1 : 0;
update_pins(0, tms, tdi); update_pins(0, tms, tdi);
update_pins(1, tms, tdi);
if (rx) { if (rx) {
if (read_tdo() > 0) if (read_tdo() > 0)
rx[i >> 3] |= 1 << (i & 7); rx[i >> 3] |= 1 << (i & 7);
} }
update_pins(1, tms, tdi);
} }
update_pins(0, tms, tdi); update_pins(0, tms, tdi);