132 lines
4.3 KiB
C
132 lines
4.3 KiB
C
/* * Copyright (c) 2023 Carl Klemm <carl@uvos.xyz>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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*
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* * Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation and/or
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* other materials provided with the distribution.
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* * Neither the name of %ORGANIZATION% nor the names of its contributors may be
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* used to endorse or promote products derived from this software without specific
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* prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
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* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#define _POSIX_C_SOURCE 199309L
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#include <stdint.h>
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#include "eismultiplexer.h"
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#include "usbshm.h"
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#include <stdlib.h>
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#include <time.h>
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#include <stdio.h>
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static void usleep(uint64_t microseconds)
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{
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struct timespec ts;
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ts.tv_sec = microseconds / 1000000;
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ts.tv_nsec = (microseconds % 1000000) * 1000;
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nanosleep(&ts, NULL);
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}
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int eismultiplexer_connect(struct eismultiplexer* muliplexer, uint16_t serial)
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{
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int ret;
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muliplexer->priv = malloc(sizeof(*muliplexer->priv));
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if(!muliplexer->priv)
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return -1;
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ret = usbshm_init(muliplexer->priv, NULL, muliplexer);
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if(ret)
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return -2;
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unsigned char serialStr[5];
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snprintf((char*)serialStr, sizeof(serialStr), "%04hu", serial);
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ret = usbshm_open(muliplexer->priv, 0xfe17, 0x07dc , serial == 0 ? NULL : serialStr);
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if(ret)
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return -3;
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return 0;
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}
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int eismultiplexer_connect_channel_exclusive(struct eismultiplexer* muliplexer, channel_t channel)
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{
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uint16_t wValue;
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// we compile with fno-strict-aliasing
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uint8_t* wValChar = (uint8_t*)&wValue;
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wValChar[0] = channel;
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wValChar[1] = 0;
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int ret;
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while((ret = usbshm_writeControlTransfer(muliplexer->priv, 2, NULL, 0, wValue, 0)) == USBSHM_ERROR_AGAIN)
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usleep(1000000);
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return ret;
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}
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int eismultiplexer_connect_channel(struct eismultiplexer* muliplexer, channel_t channel)
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{
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channel_t channels = eismultiplexer_get_connected(muliplexer);
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channels |= channel;
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return eismultiplexer_connect_channel_exclusive(muliplexer, channels);
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}
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int eismultiplexer_disconnect_channel(struct eismultiplexer* muliplexer, channel_t channel)
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{
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channel_t channels = CHANNEL_NONE;
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if(channel != CHANNEL_NONE)
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{
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channels = eismultiplexer_get_connected(muliplexer);
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channels &= ~channel;
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}
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return eismultiplexer_connect_channel_exclusive(muliplexer, channels);
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}
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channel_t eismultiplexer_get_connected(struct eismultiplexer* muliplexer)
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{
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uint8_t buffer[2] = {};
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usbshm_readControlTransferSync(muliplexer->priv, 3, 0, 0, buffer, 1);
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return buffer[0];
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}
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int eismultiplexer_set_led(struct eismultiplexer* muliplexer, bool on)
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{
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int ret;
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while((ret = usbshm_writeControlTransfer(muliplexer->priv, on, NULL, 0, 0, 0)) == USBSHM_ERROR_AGAIN)
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usleep(1000000);
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return ret;
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}
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int eismultiplexer_write_eeprom(struct eismultiplexer* muliplexer, uint16_t addr, uint16_t value)
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{
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int ret;
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while((ret = usbshm_writeControlTransfer(muliplexer->priv, 5, NULL, 0, value, addr)) == USBSHM_ERROR_AGAIN)
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usleep(1000000);
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return ret;
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}
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uint16_t eismultiplexer_read_eeprom(struct eismultiplexer* muliplexer, uint16_t addr)
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{
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uint8_t buffer[2] = {};
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usbshm_readControlTransferSync(muliplexer->priv, 4, 0, addr, buffer, 2);
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return *((uint16_t*)buffer);
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}
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void eismultiplexer_disconnect(struct eismultiplexer* muliplexer)
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{
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usbshm_distroy(muliplexer->priv);
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free(muliplexer->priv);
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muliplexer->priv = NULL;
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}
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