RE: Possible bug in SDK14 - TWIM - nRF52840PDK

Luis — Wed, 20 Sep 2017 11:09:30 GMT

Thank you :)

RE: Possible bug in SDK14 - TWIM - nRF52840PDK

Jørgen Holmefjord — Wed, 20 Sep 2017 11:00:13 GMT

Hi,

It looks like the TWI master driver is not written to support GPIO PORT1 on nRF52840. It use NRF_GPIO->PIN_CNF directly to configure the pins, which is mapped to NRF_P0 register in file nrf51_to_nrf52840.h, found in nRF5_SDK_14.0.0_3bcc1f7\components\device\ directory.

In order to add support for PORT1, you need to change all lines that contain NRF_GPIO->PIN_CNF (line 206, 207, 212, 213, 291, 292, 358, 359, 363, 364) into something like this:

uint32_t scl_pin = p_config->scl;
NRF_GPIO_Type * reg_scl = nrf_gpio_pin_port_decode(&scl_pin);
reg_scl->PIN_CNF[p_config->scl] = SCL_PIN_INIT_CONF;

You can use the attached patched file: nrf_drv_twi.c

I will report this issue internally.

Best regards,

Jørgen