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openFPGALoader
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lattice: when loadConfiguration fails -> check if external flash is blank

This commit is contained in:
Gwenhael Goavec-Merou 2023-03-05 10:16:08 +01:00
parent 3babd5d07d
commit 4a6e6f0d35
1 changed files with 36 additions and 1 deletions
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37
src/lattice.cpp
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@ -527,6 +527,10 @@ bool Lattice::program_intFlash(ConfigBitstreamParser *_cbp)
bool Lattice::prepare_flash_access()
{
if (_skip_load_bridge) {
printInfo("Skip switching to SPI access");
return true;
}
/* clear SRAM before SPI access */
if (!clearSRAM())
return false;
@ -542,14 +546,45 @@ bool Lattice::prepare_flash_access()
bool Lattice::post_flash_access()
{
bool ret = true, flash_blank = false;
if (_skip_reset) {
printInfo("Skip resetting device");
return true;
}
/* ISC REFRESH 0x79 */
printInfo("Refresh: ", false);
if (loadConfiguration() == false) {
/* when flash is blank status displays failure:
* try to check flash first sector
*/
_skip_reset = true; // avoid infinite loop
/* read flash 0 -> 255 */
uint8_t buffer[256];
ret = SPIInterface::read(buffer, 0, 256);
loadConfiguration(); // reset again
/* read ok? check if everything == 0xff */
if (ret) {
for (int i = 0; i < 256; i++) {
/* not blank: fail */
if (buffer[i] != 0xFF) {
ret = false;
break;
}
}
/* to add a note */
flash_blank = true;
}
}
printInfo("Refresh: ", false);
if (!ret) {
printError("FAIL");
displayReadReg(readStatusReg());
return false;
} else {
printSuccess("DONE");
if (flash_blank)
printWarn("Flash is blank");
}
/* bypass */