1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/pkg/devices/lib/spi/include/spi-gpio.h Sun Oct 15 22:24:25 2023 +0200
1.3 @@ -0,0 +1,69 @@
1.4 +/*
1.5 + * Perform SPI communication using GPIO operations.
1.6 + *
1.7 + * Copyright (C) 2018, 2020, 2023 Paul Boddie <paul@boddie.org.uk>
1.8 + *
1.9 + * This program is free software; you can redistribute it and/or
1.10 + * modify it under the terms of the GNU General Public License as
1.11 + * published by the Free Software Foundation; either version 2 of
1.12 + * the License, or (at your option) any later version.
1.13 + *
1.14 + * This program is distributed in the hope that it will be useful,
1.15 + * but WITHOUT ANY WARRANTY; without even the implied warranty of
1.16 + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
1.17 + * GNU General Public License for more details.
1.18 + *
1.19 + * You should have received a copy of the GNU General Public License
1.20 + * along with this program; if not, write to the Free Software
1.21 + * Foundation, Inc., 51 Franklin Street, Fifth Floor,
1.22 + * Boston, MA 02110-1301, USA
1.23 + */
1.24 +
1.25 +#include <l4/devices/gpio.h>
1.26 +#include <stdint.h>
1.27 +
1.28 +#pragma once
1.29 +
1.30 +
1.31 +
1.32 +#ifdef __cplusplus
1.33 +
1.34 +/* SPI peripheral device. */
1.35 +
1.36 +class Spi_gpio
1.37 +{
1.38 + Hw::Gpio_chip *_clock_device;
1.39 + int _clock_pin;
1.40 + Hw::Gpio_chip *_data_device;
1.41 + int _data_pin;
1.42 + Hw::Gpio_chip *_enable_device;
1.43 + int _enable_pin;
1.44 + uint32_t _frequency;
1.45 +
1.46 +public:
1.47 + /* Associate the device with a particular memory region. */
1.48 +
1.49 + explicit Spi_gpio(Hw::Gpio_chip *clock_device, int clock_pin,
1.50 + Hw::Gpio_chip *data_device, int data_pin,
1.51 + Hw::Gpio_chip *enable_device, int enable_pin,
1.52 + uint32_t frequency = 0);
1.53 +
1.54 + void send(int bytes, uint8_t data[]);
1.55 +};
1.56 +
1.57 +#endif /* __cplusplus */
1.58 +
1.59 +
1.60 +
1.61 +/* C language interface. */
1.62 +
1.63 +EXTERN_C_BEGIN
1.64 +
1.65 +void *spi_gpio_get_channel(void *clock_chip, int clock_pin,
1.66 + void *data_chip, int data_pin,
1.67 + void *enable_chip, int enable_pin,
1.68 + uint32_t frequency);
1.69 +
1.70 +void spi_gpio_send(void *channel, int bytes, uint8_t data[]);
1.71 +
1.72 +EXTERN_C_END