TDA2: how to recover from QSPI busy state

Takeo Sekiguchi

Part Number: TDA2

Hello,

In case of TDA2x QSPI is stalling due to busy status, how to return to non-busy staus by QSPI module configuration?

I tried CM_L4PER2_QSPI_CLKCTRL.MODULEMODE = 0 (disable) then CM_L4PER2_QSPI_CLKCTRL.MODULEMODE = 1, but sometimes QSPI CS looks still in active state after this operation and still stalling...

If you provide the right QSPI module reset procedure it is helpful.

Regards,

Takeo

over 6 years ago

0 Stanislav Stilyanov over 6 years ago

TI__Genius 17450 points

Hello Takeo-san,
The modulemode alone would not reset the internal module state.
Is this condition (stalling busy) happening always (after every SPI transaction attempt) or randomly?

Regards,
Stan

0 Stanislav Stilyanov over 6 years ago

TI__Genius 17450 points

Also, BUSY bit is auto-clearing by hardware. Software reset of QSPI is not needed nor possible.
BUSY sticked to 1 means issue with the SPI clock. One example could be missing or incorrect PCB routing of qspi1_rtclk.

Kindly check the TRM chapter Quad Serial Peripheral Interface

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TDA2: how to recover from QSPI busy state