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openFPGALoader
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jtag: fix shiftIR: bypass_after must be computed in all case

This commit is contained in:
Gwenhael Goavec-Merou 2022-01-09 15:38:37 +01:00
parent 857e2795b6
commit 796483f61f
1 changed files with 8 additions and 4 deletions
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12
src/jtag.cpp
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@ -307,6 +307,14 @@ int Jtag::shiftIR(unsigned char *tdi, unsigned char *tdo, int irlen, int end_sta
{ {
display("%s: avant shiftIR\n", __func__); display("%s: avant shiftIR\n", __func__);
int bypass_after = 0; int bypass_after = 0;
if (end_state != SHIFT_IR) {
/* when the device is not alone and not
* the first a serie of bypass must be
* send to complete send ir sequence
*/
for (int i = 0; i < device_index; i++)
bypass_after += _irlength_list[i];
}
/* if not in SHIFT IR move to this state */ /* if not in SHIFT IR move to this state */
if (_state != SHIFT_IR) { if (_state != SHIFT_IR) {
@ -321,10 +329,6 @@ int Jtag::shiftIR(unsigned char *tdi, unsigned char *tdo, int irlen, int end_sta
int bypass_before = 0; int bypass_before = 0;
for (unsigned int i = device_index + 1; i < _devices_list.size(); i++) for (unsigned int i = device_index + 1; i < _devices_list.size(); i++)
bypass_before += _irlength_list[i]; bypass_before += _irlength_list[i];
/* same for device after targeted device
*/
for (int i = 0; i < device_index; i++)
bypass_after += _irlength_list[i];
/* if > 0 send bits */ /* if > 0 send bits */
if (bypass_before > 0) { if (bypass_before > 0) {