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ftdi MPSSE / jtag: add option to use neg edge for TDO's sampling

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This commit is contained in:
Gwenhael Goavec-Merou
2022-03-11 07:45:48 +01:00
parent 86b2e14dbd
commit 964c7d6659
7 changed files with 37 additions and 13 deletions
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src/ftdiJtagMPSSE.cpp
+7 -5
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@@ -29,10 +29,12 @@ using namespace std;
#endif
FtdiJtagMPSSE::FtdiJtagMPSSE(const FTDIpp_MPSSE::mpsse_bit_config &cable,
string dev, const string &serial, uint32_t clkHZ, int8_t verbose):
string dev, const string &serial, uint32_t clkHZ,
bool invert_read_edge, int8_t verbose):
FTDIpp_MPSSE(cable, dev, serial, clkHZ, verbose), _ch552WA(false),
_write_mode(MPSSE_WRITE_NEG), // always write on neg edge
_read_mode(0)
_read_mode(0),
_invert_read_edge(invert_read_edge) // false: pos, true: neg
{
init_internal(cable);
}
@@ -88,10 +90,10 @@ void FtdiJtagMPSSE::config_edge()
{
/* at high (>15MHz) with digilent cable (arty)
* opposite edges must be used.
* Not required with classic FT2232
* Not required with classic FT2232 but user selectable
*/
if (FTDIpp_MPSSE::getClkFreq() >= 15000000 &&
!strncmp((const char *)_iproduct, "Digilent USB Device", 19)) {
if (_invert_read_edge || (FTDIpp_MPSSE::getClkFreq() >= 15000000 &&
!strncmp((const char *)_iproduct, "Digilent USB Device", 19))) {
_read_mode = MPSSE_READ_NEG;
} else {
_read_mode = 0;