98 lines
3.1 KiB
C
98 lines
3.1 KiB
C
/*
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* Copyright 2016 Dominic Spill <dominicgs@gmail.com>
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*
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* This file is part of HackRF.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; see the file COPYING. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street,
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* Boston, MA 02110-1301, USA.
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*/
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#include "operacake.h"
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#include "hackrf_core.h"
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#define OPERACAKE_PIN_OE (1<<7)
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#define OPERACAKE_PIN_U2CTRL1 (1<<6)
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#define OPERACAKE_PIN_U2CTRL0 (1<<5)
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#define OPERACAKE_PIN_U3CTRL1 (1<<4)
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#define OPERACAKE_PIN_U3CTRL0 (1<<3)
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#define OPERACAKE_PIN_U1CTRL (1<<2)
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#define OPERACAKE_PIN_LEDEN2 (1<<1)
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#define OPERACAKE_PIN_LEDEN (1<<0)
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#define OPERACAKE_PA1 (0)
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#define OPERACAKE_PA2 (OPERACAKE_PIN_U2CTRL0)
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#define OPERACAKE_PA3 (OPERACAKE_PIN_U2CTRL1)
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#define OPERACAKE_PA4 (OPERACAKE_PIN_U2CTRL0 | OPERACAKE_PIN_U2CTRL1)
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#define OPERACAKE_PB1 (0)
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#define OPERACAKE_PB2 (OPERACAKE_PIN_U3CTRL0)
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#define OPERACAKE_PB3 (OPERACAKE_PIN_U3CTRL1)
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#define OPERACAKE_PB4 (OPERACAKE_PIN_U3CTRL0 | OPERACAKE_PIN_U3CTRL1)
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#define OPERACAKE_CROSSOVER (0)
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#define OPERACAKE_EN_LEDS (OPERACAKE_PIN_LEDEN2)
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#define OPERACAKE_REG_INPUT 0x00
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#define OPERACAKE_REG_OUTPUT 0x01
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#define OPERACAKE_REG_POLARITY 0x02
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#define OPERACAKE_REG_CONFIG 0x03
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#define OPERACAKE_DEFAULT_OUTPUT (OPERACAKE_PIN_OE | OPERACAKE_PIN_U1CTRL | \
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OPERACAKE_PA1 | OPERACAKE_PB1 | \
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OPERACAKE_EN_LEDS)
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#define OPERACAKE_CONFIG_ALL_OUTPUT (0x00)
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typedef struct {
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i2c_bus_t* const bus;
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uint8_t i2c_address;
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} operacake_driver_t;
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operacake_driver_t operacake_driver = {
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.bus = &i2c0,
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.i2c_address = 0x18,
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};
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uint8_t operacake_read_single(operacake_driver_t* drv, uint8_t reg);
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void operacake_write(operacake_driver_t* drv, const uint8_t* const data, const size_t data_count);
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uint8_t operacake_init(void) {
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/* TODO: detect Operacake */
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uint8_t output_data[] = {OPERACAKE_REG_OUTPUT,
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OPERACAKE_DEFAULT_OUTPUT};
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operacake_write(&operacake_driver, output_data, 2);
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const uint8_t config_data[] = {OPERACAKE_REG_CONFIG,
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OPERACAKE_CONFIG_ALL_OUTPUT};
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operacake_write(&operacake_driver, config_data, 2);
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return 0;
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}
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uint8_t operacake_set_ports(uint8_t PA, uint8_t PB) {
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return PA | PB;
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}
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/* read single register */
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uint8_t operacake_read_single(operacake_driver_t* drv, uint8_t reg) {
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const uint8_t data_tx[] = { reg };
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uint8_t data_rx[] = { 0x00 };
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i2c_bus_transfer(drv->bus, drv->i2c_address, data_tx, 1, data_rx, 1);
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return data_rx[0];
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}
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/* Write to one of the PCA9557 registers */
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void operacake_write(operacake_driver_t* drv, const uint8_t* const data, const size_t data_count) {
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i2c_bus_transfer(drv->bus, drv->i2c_address, data, data_count, NULL, 0);
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}
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