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pal: spi: NRFX SPI bus implementation for Sidewalk.
SPI bus implementation based on the NRFX for nRF52840. Signed-off-by: Marcin Gasiorek <[email protected]>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,89 @@ | ||
| /* | ||
| * Copyright (c) 2024 Nordic Semiconductor ASA | ||
| * | ||
| * SPDX-License-Identifier: LicenseRef-Nordic-5-Clause | ||
| */ | ||
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| #include <app_subGHz_config.h> | ||
| #include <sid_pal_serial_bus_ifc.h> | ||
| #include <nrfx_spi.h> | ||
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| #include <zephyr/logging/log.h> | ||
| LOG_MODULE_REGISTER(sid_nrfx_spi_bus, CONFIG_SPI_BUS_LOG_LEVEL); | ||
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| #define SPI_INSTANCE_ID CONFIG_SIDEWALK_NRFX_SPI_ID | ||
| #define SPI_SCK_PIN NRF_DT_GPIOS_TO_PSEL(DT_NODELABEL(nrfx_spi_sck), gpios) | ||
| #define SPI_MOSI_PIN NRF_DT_GPIOS_TO_PSEL(DT_NODELABEL(nrfx_spi_mosi), gpios) | ||
| #define SPI_MISO_PIN NRF_DT_GPIOS_TO_PSEL(DT_NODELABEL(nrfx_spi_miso), gpios) | ||
| #define SPI_CS_PIN NRF_DT_GPIOS_TO_PSEL(DT_NODELABEL(nrfx_spi_cs), gpios) | ||
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| static const nrfx_spi_t spi = NRFX_SPI_INSTANCE(SPI_INSTANCE_ID); | ||
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| static sid_error_t bus_serial_spi_xfer(const struct sid_pal_serial_bus_iface *iface, | ||
| const struct sid_pal_serial_bus_client *client, uint8_t *tx, | ||
| uint8_t *rx, size_t xfer_size); | ||
| static sid_error_t bus_serial_spi_destroy(const struct sid_pal_serial_bus_iface *iface); | ||
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| static const struct sid_pal_serial_bus_iface bus_ops = { | ||
| .xfer = bus_serial_spi_xfer, | ||
| .destroy = bus_serial_spi_destroy, | ||
| }; | ||
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| static sid_error_t bus_serial_spi_xfer(const struct sid_pal_serial_bus_iface *iface, | ||
| const struct sid_pal_serial_bus_client *client, uint8_t *tx, | ||
| uint8_t *rx, size_t xfer_size) | ||
| { | ||
| ARG_UNUSED(iface); | ||
| ARG_UNUSED(client); | ||
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| sid_error_t ret = SID_ERROR_NONE; | ||
| nrfx_err_t result; | ||
| nrfx_spi_xfer_desc_t trx_set = | ||
| NRFX_SPI_XFER_TRX(tx, tx ? xfer_size : 0, rx, rx ? xfer_size : 0); | ||
| nrfx_spi_config_t config = | ||
| NRFX_SPI_DEFAULT_CONFIG(SPI_SCK_PIN, SPI_MOSI_PIN, SPI_MISO_PIN, SPI_CS_PIN); | ||
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| config.frequency = get_radio_cfg()->bus_selector.speed_hz; | ||
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| LOG_DBG("%s(%p, %p, %d)", __func__, (void *)tx, (void *)rx, xfer_size); | ||
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| result = nrfx_spi_init(&spi, &config, NULL, NULL); | ||
| if (result != NRFX_SUCCESS) { | ||
| LOG_ERR("NRFX driver init fail: %08x", result); | ||
| return SID_ERROR_IO_ERROR; | ||
| } | ||
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| result = nrfx_spi_xfer(&spi, &trx_set, 0); | ||
| if (result != NRFX_SUCCESS) { | ||
| LOG_ERR("NRFX driver transfer fail: %08x", result); | ||
| ret = SID_ERROR_GENERIC; | ||
| } | ||
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| nrfx_spi_uninit(&spi); | ||
|
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| return ret; | ||
| } | ||
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| static sid_error_t bus_serial_spi_destroy(const struct sid_pal_serial_bus_iface *iface) | ||
| { | ||
| LOG_DBG("%s(%p)", __func__, iface); | ||
| if (!iface) { | ||
| return SID_ERROR_INVALID_ARGS; | ||
| } | ||
|
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| return SID_ERROR_NONE; | ||
| } | ||
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| sid_error_t sid_pal_serial_bus_nordic_spi_create(const struct sid_pal_serial_bus_iface **iface, | ||
| const void *cfg) | ||
| { | ||
| ARG_UNUSED(cfg); | ||
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| if (!iface) { | ||
| return SID_ERROR_INVALID_ARGS; | ||
| } | ||
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| *iface = &bus_ops; | ||
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| return SID_ERROR_NONE; | ||
| } |