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gowin: fix flash erase for GW1NSR-4C: during shiftDR sequence TDI MUST be 0x0000

This commit is contained in:
Gwenhael Goavec-Merou 2024-01-04 07:24:02 +01:00
parent c51dbcb0ed
commit 62ad3a3003
1 changed files with 5 additions and 9 deletions
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14
src/gowin.cpp
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@ -278,6 +278,9 @@ void Gowin::programFlash()
return;
}
if (!eraseSRAM())
return;
if (!enableCfg())
return;
if (!eraseFLASH())
@ -811,12 +814,6 @@ bool Gowin::writeSRAM(const uint8_t *data, int length)
*/
bool Gowin::eraseFLASH()
{
if (readStatusReg() & STATUS_GOWIN_VLD) {
if (!eraseSRAM()) {
return false;
}
}
printInfo("Erase FLASH ", false);
ProgressBar progress("Erasing FLASH", 100, 50, _quiet);
@ -835,11 +832,10 @@ bool Gowin::eraseFLASH()
* others 1 x 32bits
*/
int nb_iter = (is_gw1n1)?65:1;
uint8_t dummy[4] = {0, 0, 0, 0};
for (int i = 0; i < nb_iter; ++i) {
// keep following sequence as-is. it is _not_ _jtag->shiftDR().
_jtag->set_state(Jtag::SHIFT_DR);
_jtag->toggleClk(32);
_jtag->set_state(Jtag::RUN_TEST_IDLE);
_jtag->shiftDR(dummy, NULL, 32);
}
/* TN653 specifies to wait for 160ms with