Implementing SPI interface on Portenta H7 with Micropython

Balz-Heusler · May 22, 2021, 3:40pm

I am looking for a working Micropython implementation of the SPI interface on a Portenta H7. The Pinout Diagram shows a SPI CS Pin. This does not show in the 1.15 Documentation.

kwagyeman · May 22, 2021, 5:19pm

Hi, it looks like SPI2 isn’t enabled in the latest firmware.

github.com

openmv/micropython/blob/93cc3d48ae8eaed1f64957f82c96473c2510ca09/ports/stm32/boards/PORTENTA/mpconfigboard.h#L114


      
          // UART7 config
          #define MICROPY_HW_UART7_TX         (pyb_pin_BT_TXD)
          #define MICROPY_HW_UART7_RX         (pyb_pin_BT_RXD)
          #define MICROPY_HW_UART7_RTS        (pyb_pin_BT_RTS)
          #define MICROPY_HW_UART7_CTS        (pyb_pin_BT_CTS)
          
          
// I2C busses
          #define MICROPY_HW_I2C3_SCL         (pin_H7)
          #define MICROPY_HW_I2C3_SDA         (pin_H8)
          
          
// SPI
          //#define MICROPY_HW_SPI2_NSS         (pin_I0)
          //#define MICROPY_HW_SPI2_SCK         (pin_I1)
          //#define MICROPY_HW_SPI2_MISO        (pin_B14)
          //#define MICROPY_HW_SPI2_MOSI        (pin_B15)
          
          
// USRSW is pulled low. Pressing the button makes the input go high.
          #define MICROPY_HW_USRSW_PIN        (pin_A0)
          #define MICROPY_HW_USRSW_PULL       (GPIO_NOPULL)
          #define MICROPY_HW_USRSW_EXTI_MODE  (GPIO_MODE_IT_RISING)
          #define MICROPY_HW_USRSW_PRESSED    (1)

@iabdalkader Can you enable SPI2 on the Portenta? Also, this is probably why the LCD/FLIR/TV modules don’t work.

iabdalkader · May 22, 2021, 8:42pm

Please open a github issue.

Balz-Heusler · May 25, 2021, 9:41am

I do not know how to do that

iabdalkader · May 25, 2021, 3:53pm

Fixed, it will be available in the next release soon.

Workshopshed · August 4, 2021, 7:27am

It is “simply” a case of enabling those defines and rebuilding micropython?

iabdalkader · August 4, 2021, 12:02pm

This has been fixed and enabled.

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Implementing SPI interface on Portenta H7 with Micropython

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