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https://github.com/RIOT-OS/RIOT.git
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99 lines
2.9 KiB
C
99 lines
2.9 KiB
C
/*
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* Copyright (C) 2021 Inria
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*
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* This file is subject to the terms and conditions of the GNU Lesser
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* General Public License v2.1. See the file LICENSE in the top level
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* directory for more details.
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*/
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/**
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* @ingroup pkg_driver_sx126x
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* @{
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*
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* @file
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* @brief HAL implementation for the SX1261/2 LoRa radio driver
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*
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* @author Alexandre Abadie <alexandre.abadie@inria.fr>
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*
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* @}
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*/
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#include "ztimer.h"
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#include "periph/gpio.h"
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#include "periph/spi.h"
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#include "sx126x.h"
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#include "sx126x_hal.h"
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#define ENABLE_DEBUG 0
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#include "debug.h"
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#define SX126X_SPI_SPEED (SPI_CLK_1MHZ)
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#define SX126X_SPI_MODE (SPI_MODE_0)
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sx126x_hal_status_t sx126x_hal_write(const void *context,
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const uint8_t *command, const uint16_t command_length,
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const uint8_t *data, const uint16_t data_length)
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{
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(void)data;
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(void)data_length;
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sx126x_t *dev = (sx126x_t *)context;
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/* wait for the device to not be busy anymore */
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while (gpio_read(dev->params->busy_pin)) {}
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spi_acquire(dev->params->spi, SPI_CS_UNDEF, SX126X_SPI_MODE, SX126X_SPI_SPEED);
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spi_transfer_bytes(dev->params->spi, dev->params->nss_pin, data_length != 0, command, NULL,
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command_length);
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if (data_length) {
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spi_transfer_bytes(dev->params->spi, dev->params->nss_pin, false, data, NULL, data_length);
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}
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spi_release(dev->params->spi);
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return 0;
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}
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sx126x_hal_status_t sx126x_hal_read(const void *context,
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const uint8_t *command, const uint16_t command_length,
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uint8_t *data, const uint16_t data_length)
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{
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sx126x_t *dev = (sx126x_t *)context;
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/* wait for the device to not be busy anymore */
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while (gpio_read(dev->params->busy_pin)) {}
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spi_acquire(dev->params->spi, SPI_CS_UNDEF, SX126X_SPI_MODE, SX126X_SPI_SPEED);
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spi_transfer_bytes(dev->params->spi, dev->params->nss_pin, true, command, NULL, command_length);
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spi_transfer_bytes(dev->params->spi, dev->params->nss_pin, false, NULL, data, data_length);
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spi_release(dev->params->spi);
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return 0;
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}
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sx126x_hal_status_t sx126x_hal_reset(const void *context)
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{
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DEBUG("[sx126x_hal] reset\n");
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sx126x_t *dev = (sx126x_t *)context;
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gpio_set(dev->params->reset_pin);
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gpio_clear(dev->params->reset_pin);
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/* it takes 100us for the radio to be ready after reset */
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ztimer_sleep(ZTIMER_USEC, 100);
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gpio_set(dev->params->reset_pin);
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return 0;
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}
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sx126x_hal_status_t sx126x_hal_wakeup(const void *context)
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{
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DEBUG("[sx126x_hal] wakeup\n");
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sx126x_t *dev = (sx126x_t *)context;
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spi_acquire(dev->params->spi, SPI_CS_UNDEF, SX126X_SPI_MODE, SX126X_SPI_SPEED);
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gpio_clear(dev->params->nss_pin);
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gpio_set(dev->params->nss_pin);
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spi_release(dev->params->spi);
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/* it takes 500us for the radio device to be ready after waking up */
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ztimer_sleep(ZTIMER_USEC, 500);
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return 0;
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}
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