Why does Mailbox Client Intel® FPGA IP returns HW_NOT_READY for subsequent QSPI commands, despite a successful QSPI_OPEN request? - Why does Mailbox Client Intel® FPGA IP returns HW_NOT_READY for subsequent QSPI commands, despite a successful QSPI_OPEN request? Description The problem may be seen in the Intel® Quartus® Prime Pro Edition Software version 23.2 when running QSPI commands after a successful QSPI_OPEN. The QSPI_OPEN returns “OK,” but subsequent QSPI commands return the error “HW_NOT_READY.” It is affecting Intel Agilex® devices only. This is due to an SDM firmware change in Intel® Quartus® Prime Pro Edition Software 23.2. Resolution To workaround this problem, run the QSPI_SET_CS commands after every QSPI_OPEN. If the workaround is not applicable, please file a request to Intel® for support. Custom Fields values: ['novalue'] Troubleshooting 15013475510 False ['novalue'] ['FPGA Dev Tools Quartus® Prime Software Pro'] 23.3 23.2 ['Agilex™ FPGA Portfolio'] ['novalue'] ['novalue'] ['novalue']