Taiyo Yuden EYSHJNZXZ (nRF52832) cannot use NFC pins as GPIO

RE: Taiyo Yuden EYSHJNZXZ (nRF52832) cannot use NFC pins as GPIO

NewAce — Fri, 24 Mar 2017 21:16:45 GMT

I actually found the issue (see my comment above). The Taiyo Yuden module includes a 32MHz crystal and a few capacitors under the hood and has a built-in Bluetooth antenna. It is a fully certified module. It does not have a 32kHz crystal, but the GPIO9/10 pins are exposed directly from the nrf52832 chip, so nothing unexpected.

RE: Taiyo Yuden EYSHJNZXZ (nRF52832) cannot use NFC pins as GPIO

NewAce — Fri, 24 Mar 2017 21:09:01 GMT

I discovered that the issue was actually a module alignment issue on the PCB. After throwing the board back into the reflow oven, the outputs started working. My bad. For anyone stumbling onto this question and using the NRF52832 / NRF52_DK with MBED-CLI, the targets.json file needs to be modified in order to include the CONFIG_NFCT_PINS_AS_GPIOS define, as Daniel hinted to above:

"NRF52_DK": {
        "supported_form_factors": ["ARDUINO"],
        "inherits": ["MCU_NRF52"],
        "macros_add": ["BOARD_PCA10040", "NRF52_PAN_12", "NRF52_PAN_15", "NRF52_PAN_58", "NRF52_PAN_55", "NRF52_PAN_54", "NRF52_PAN_31", "NRF52_PAN_30", "NRF52_PAN_51", "NRF52_PAN_36", "NRF52_PAN_53", "S132", "CONFIG_NFCT_PINS_AS_GPIOS", "BLE_STACK_SUPPORT_REQD", "SWI_DISABLE0", "NRF52_PAN_20", "NRF52_PAN_64", "NRF52_PAN_62", "NRF52_PAN_63"],
        "device_has": ["ANALOGIN", "ERROR_PATTERN", "I2C", "I2C_ASYNCH", "INTERRUPTIN", "LOWPOWERTIMER", "PORTIN", "PORTINOUT", "PORTOUT", "PWMOUT", "RTC", "SERIAL", "SERIAL_ASYNCH", "SERIAL_FC", "SLEEP", "SPI", "SPI_ASYNCH", "SPISLAVE"],
        "release_versions": ["2", "5"],
        "device_name": "nRF52832_xxAA"
    },

RE: Taiyo Yuden EYSHJNZXZ (nRF52832) cannot use NFC pins as GPIO

Daniel Wang — Fri, 24 Mar 2017 15:45:06 GMT

set CONFIG_NFCT_PINS_AS_GPIOS as a define in the Preprocessor Symbols in Keil

RE: Taiyo Yuden EYSHJNZXZ (nRF52832) cannot use NFC pins as GPIO

endnode — Fri, 24 Mar 2017 15:04:18 GMT

Have you searched the forum, e.g. this question? The UICR settings is one thing but there could be some HW components on board. What the vendor says?