143 lines
4.5 KiB
C
143 lines
4.5 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(x) (x<<7)
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#define OPERACAKE_PIN_U2CTRL1(x) (x<<6)
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#define OPERACAKE_PIN_U2CTRL0(x) (x<<5)
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#define OPERACAKE_PIN_U3CTRL1(x) (x<<4)
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#define OPERACAKE_PIN_U3CTRL0(x) (x<<3)
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#define OPERACAKE_PIN_U1CTRL(x) (x<<2)
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#define OPERACAKE_PIN_LEDEN2(x) (x<<1)
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#define OPERACAKE_PIN_LEDEN(x) (x<<0)
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#define OPERACAKE_PORT_A1 (OPERACAKE_PIN_U2CTRL0(0) | OPERACAKE_PIN_U2CTRL1(0))
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#define OPERACAKE_PORT_A2 (OPERACAKE_PIN_U2CTRL0(1) | OPERACAKE_PIN_U2CTRL1(0))
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#define OPERACAKE_PORT_A3 (OPERACAKE_PIN_U2CTRL0(0) | OPERACAKE_PIN_U2CTRL1(1))
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#define OPERACAKE_PORT_A4 (OPERACAKE_PIN_U2CTRL0(1) | OPERACAKE_PIN_U2CTRL1(1))
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#define OPERACAKE_PORT_B1 (OPERACAKE_PIN_U3CTRL0(0) | OPERACAKE_PIN_U3CTRL1(0))
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#define OPERACAKE_PORT_B2 (OPERACAKE_PIN_U3CTRL0(1) | OPERACAKE_PIN_U3CTRL1(0))
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#define OPERACAKE_PORT_B3 (OPERACAKE_PIN_U3CTRL0(0) | OPERACAKE_PIN_U3CTRL1(1))
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#define OPERACAKE_PORT_B4 (OPERACAKE_PIN_U3CTRL0(1) | OPERACAKE_PIN_U3CTRL1(1))
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#define OPERACAKE_SAMESIDE OPERACAKE_PIN_U1CTRL(1)
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#define OPERACAKE_CROSSOVER OPERACAKE_PIN_U1CTRL(0)
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#define OPERACAKE_EN_LEDS (OPERACAKE_PIN_LEDEN2(1) | OPERACAKE_PIN_LEDEN2(0))
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#define OPERACAKE_GPIO_EN OPERACAKE_PIN_OE(0)
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#define OPERACAKE_GPIO_DISABLE OPERACAKE_PIN_OE(1)
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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_GPIO_DISABLE | OPERACAKE_SAMESIDE \
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| OPERACAKE_PORT_A1 | OPERACAKE_PORT_B1 \
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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 port_to_pins(uint8_t port) {
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switch(port) {
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case OPERACAKE_PA1:
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return OPERACAKE_PORT_A1;
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case OPERACAKE_PA2:
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return OPERACAKE_PORT_A2;
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case OPERACAKE_PA3:
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return OPERACAKE_PORT_A3;
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case OPERACAKE_PA4:
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return OPERACAKE_PORT_A4;
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case OPERACAKE_PB1:
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return OPERACAKE_PORT_B1;
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case OPERACAKE_PB2:
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return OPERACAKE_PORT_B2;
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case OPERACAKE_PB3:
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return OPERACAKE_PORT_B3;
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case OPERACAKE_PB4:
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return OPERACAKE_PORT_B4;
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}
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return 0xFF;
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}
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uint8_t operacake_set_ports(uint8_t PA, uint8_t PB) {
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uint8_t side, pa, pb;
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uint8_t output_data[2];
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/* Start with some error checking,
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* which should have been done either
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* on the host or elsewhere in firmware
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*/
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if((PA > OPERACAKE_PB4) || (PB > OPERACAKE_PB4)) {
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return 1;
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}
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/* Check which side PA and PB are on */
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if(((PA <= OPERACAKE_PA4) && (PB <= OPERACAKE_PA4))
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|| ((PA > OPERACAKE_PA4) && (PB > OPERACAKE_PA4))) {
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return 1;
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}
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if(PA > OPERACAKE_PA4)
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side = OPERACAKE_CROSSOVER;
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else
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side = OPERACAKE_SAMESIDE;
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pa = port_to_pins(PA);
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pb = port_to_pins(PB);
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output_data[0] = OPERACAKE_REG_OUTPUT;
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output_data[1] = (OPERACAKE_GPIO_DISABLE | side
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| pa | pb | OPERACAKE_EN_LEDS);
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operacake_write(&operacake_driver, output_data, 2);
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return 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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