nRF52840 SPI does not update register values in MAX30003 module

RE: nRF52840 SPI does not update register values in MAX30003 module

rmptxf — Tue, 14 Mar 2023 20:30:05 GMT

Hi,

It's actually the default one NRF_DRV_SPI_DEFAULT_CONFIG with MODE_0 and 4MHz.

I mean the wing board 3.3V pin, I'm using the module not the bare chip. Yes the chip is getting 1.8v, a regulator is in the board for that.

RE: nRF52840 SPI does not update register values in MAX30003 module

Giovani_Giorgio — Tue, 14 Mar 2023 14:22:52 GMT

Hi again,

I have an update

I took my nRF52840 DK and I connected my MAX30003wing.

With the same SPI pins configuration It did not work even with the MAX30003wing.

So I changed MISO from P0.22 to P0.30 and it worked properly.

I have wasted so many hours for this...

Thank you

RE: nRF52840 SPI does not update register values in MAX30003 module

Giovani_Giorgio — Tue, 14 Mar 2023 12:14:55 GMT

The thing is that I have already created the PCB with those pins so it is rather difficult change it now.
But apart from that even if the MISO pin is faulty, the command should be inserted correctly to MAX30003 since MOSI is a regular GPIO.

RE: nRF52840 SPI does not update register values in MAX30003 module

azwin — Tue, 14 Mar 2023 09:12:17 GMT

because it is recommended for QSPI usage

RE: nRF52840 SPI does not update register values in MAX30003 module

Giovani_Giorgio — Tue, 14 Mar 2023 08:58:25 GMT

Hi, can you share the spi pin settings ?
Also, when you say VDD you mean OVDD or DVDD?

RE: nRF52840 SPI does not update register values in MAX30003 module

Giovani_Giorgio — Tue, 14 Mar 2023 08:15:20 GMT

Hi, no I am not using the max30003wing I am using my custom board with MAX300003 and nRF52840 chip
and I cannot modify the pins unfortunately

RE: nRF52840 SPI does not update register values in MAX30003 module

Giovani_Giorgio — Tue, 14 Mar 2023 08:13:43 GMT

Hi,
what is wrong with pin (0,22)?

RE: nRF52840 SPI does not update register values in MAX30003 module

rmptxf — Tue, 14 Mar 2023 00:55:57 GMT

I'm also struggling with this sensor and using the wing breakout too.

Here I wasn't even able to get a valid chip id. That's at startup and not right after a chip reset.

Edit1:

I was able to get a valid chip id, but after using a 1.8v VDD. And that's with the wing module, that is stated to work with 3.3v.

Edit2:

So, yes it turns out that a 1.8v VDD did it. Now it is working fine. Able to get the ecg samples on the fifo buffer.

There is an mbed based library for this sensor that would be good to check and port to the nRF SDKs: https://os.mbed.com/users/h_keyur/code/MAX_IOT_KIT/

RE: nRF52840 SPI does not update register values in MAX30003 module

harry4951 — Mon, 13 Mar 2023 20:44:02 GMT

Hardware: If you are using max30003wing breakout board, try to connect both breakout GNDs to the DK.

Software: I manage to read the data 0x080004 back using max30003wing breakout. I am using the following setup, the rest are the same.

#define SPI_INSTANCE 1 /**< SPI instance index. */
static const nrf_drv_spi_t m_spi = NRF_DRV_SPI_INSTANCE(SPI_INSTANCE); /**< SPI instance. */
static volatile bool spi_xfer_done; /**< Flag used to indicate that SPI instance completed the transfer. */

#define SPI_MISO_PIN NRF_GPIO_PIN_MAP(1, 8)
#define SPI_MOSI_PIN 30
#define SPI_SCK_PIN 31
#define SPI_SS_PIN NRF_GPIO_PIN_MAP(1, 7)

RE: nRF52840 SPI does not update register values in MAX30003 module

azwin — Mon, 13 Mar 2023 06:07:08 GMT

check the pin setting esp : #define SPI_MISO_PN NRF_GPIO_PIN_MAP(0,22) . give any other pin number n check