About Bob Shankle

Bob Shankle · 2022-04-12

Hi All,I'm using a STM32H7 MCU with a ISSI IS25LP256D serial flash chip. (32MB.)I wrote a driver using a simple microcontroller and was able to read the Status Register by adding a 8uSec pause after the 0x05 command and the clock pulses to get the r...

Bob Shankle · 2022-02-22

Hi Folks,I'm working with a custom board using STM32H743 and wanting to work with a ISSI IS256P256D QSPI chip.I tried using STMCubeMX to create a sample project. when I start the project using the "Start my project from MCU" it creates files but th...

Bob Shankle · 2022-01-18

Hi Folks,I've been asked to look at a problem we are having migrating from the STM32F7 to STM32H7. We are seeing a problem when communicating with the QUAD SPI chip (Micron MT25QL256ABA).(I've very familiar with SPI communications and microcontrolle...

Bob Shankle · 2022-04-13

Hi Tesla,The screenshot of the LAX was provided by the ISSI FAE, so I can't generate other shots. (The problem was sending WREN and the SR would return 0x04 instead of 0x02. The problem went away with the delay recommended.)Is it possible to add th...

Bob Shankle · 2022-04-13

exactly. thanks,Bob

Bob Shankle · 2022-04-13

That is probably the part I'm missing. How do I add the space (time delay) between the 0x05 command and when clock pulses start to receive the data back from the ISSI chip.

Bob Shankle · 2022-04-13

I agree with you Pavel, but I think the clock pulses during the dummy cycles causes a problem for the ISSI chip.The "problem" is we can demonstrate how the chip behaves, now to get the STM32 software to support that behavior. (I know it is rewarding...

Bob Shankle · 2022-04-13

Hi All,Thanks for the responses. @Tesla DeLorean you are correct 6 dummy clock(cycles), etc doesn't make sense. I'm new to the STM32 HAL library and was hoping I could get some delay after the 0x05 command.Note, I have the ISSI chip working great w...

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HAL_QSPI_AutoPolling_* delay between command and response

Sample project using STM32H743 and ISSI IS25LP256D (QSPI chip)

QSPI migration from STM32F7 to STM32H7

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Re: HAL_QSPI_AutoPolling_* delay between command and response

Re: HAL_QSPI_AutoPolling_* delay between command and response

Re: HAL_QSPI_AutoPolling_* delay between command and response