RE: nRF52832 TWI0 and SPI1 conflicts

HanCatNguyen — Sun, 19 May 2024 22:28:32 GMT

Actually, never mind. I think I've figured it out: after adding capacitors to the I2C lines and SPI lines (and to GND), both communications seem to be stable now.

RE: nRF52832 TWI0 and SPI1 conflicts

HanCatNguyen — Sat, 18 May 2024 18:07:28 GMT

Thanks.

I have just realized that my TWI works when I connected a logic analyzer to the SDA and SCL pins, but it returns the NRF_DRV_TWI_EVT_ADDRESS_NACK if I didn't have the logic analyzer connected. I have verified that the ICM20948 module I'm using has 10kOhm pull-up resistors connected to SDA and SCL. I have tried changing the SDA and SCL pins configuration to no-pull instead of pull-up, but still the same unstable TWI communication.

#define SCL_PIN_INIT_CONF \
( (GPIO_PIN_CNF_SENSE_Disabled << GPIO_PIN_CNF_SENSE_Pos) \
| (GPIO_PIN_CNF_DRIVE_S0D1 << GPIO_PIN_CNF_DRIVE_Pos) \
| (GPIO_PIN_CNF_PULL_Disabled << GPIO_PIN_CNF_PULL_Pos) \
| (GPIO_PIN_CNF_INPUT_Connect << GPIO_PIN_CNF_INPUT_Pos) \
| (GPIO_PIN_CNF_DIR_Input << GPIO_PIN_CNF_DIR_Pos))

#define SDA_PIN_INIT_CONF SCL_PIN_INIT_CONF

#define SDA_PIN_UNINIT_CONF \
( (GPIO_PIN_CNF_SENSE_Disabled << GPIO_PIN_CNF_SENSE_Pos) \
| (GPIO_PIN_CNF_DRIVE_H0H1 << GPIO_PIN_CNF_DRIVE_Pos) \
| (GPIO_PIN_CNF_PULL_Disabled << GPIO_PIN_CNF_PULL_Pos) \
| (GPIO_PIN_CNF_INPUT_Disconnect << GPIO_PIN_CNF_INPUT_Pos) \
| (GPIO_PIN_CNF_DIR_Input << GPIO_PIN_CNF_DIR_Pos))

#define SCL_PIN_UNINIT_CONF SDA_PIN_UNINIT_CONF

#define SCL_PIN_INIT_CONF_CLR \
( (GPIO_PIN_CNF_SENSE_Disabled << GPIO_PIN_CNF_SENSE_Pos) \
| (GPIO_PIN_CNF_DRIVE_S0D1 << GPIO_PIN_CNF_DRIVE_Pos) \
| (GPIO_PIN_CNF_PULL_Disabled << GPIO_PIN_CNF_PULL_Pos) \
| (GPIO_PIN_CNF_INPUT_Connect << GPIO_PIN_CNF_INPUT_Pos) \
| (GPIO_PIN_CNF_DIR_Output << GPIO_PIN_CNF_DIR_Pos))

What else can cause this, and how may I fix it?

RE: nRF52832 TWI0 and SPI1 conflicts

Amanda Hsieh — Fri, 17 May 2024 21:38:14 GMT

Hello,

Most of the staff is away for a long weekend in Norway, so there will be some delays in response time. Thanks for your patience.