76 lines
2.0 KiB
C++
76 lines
2.0 KiB
C++
/*
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DingusPPC - The Experimental PowerPC Macintosh emulator
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Copyright (C) 2018-22 divingkatae and maximum
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(theweirdo) spatium
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(Contact divingkatae#1017 or powermax#2286 on Discord for more info)
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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 3 of the License, or
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(at your option) any later version.
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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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You should have received a copy of the GNU General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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/** @file Generic PROM device programmable over I2C. */
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#include <devices/common/i2c/i2cprom.h>
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#include <loguru.hpp>
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#include <cinttypes>
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#include <cstring>
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I2CProm::I2CProm(uint8_t dev_addr, int size)
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{
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supports_types(HWCompType::I2C_DEV);
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this->my_addr = dev_addr;
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this->rom_size = size;
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// allocate storage for ROM data
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this->data = std::unique_ptr<uint8_t[]> (new uint8_t[this->rom_size]);
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}
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void I2CProm::fill_memory(int start, int size, uint8_t c)
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{
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if ((start + size) <= this->rom_size) {
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std::memset(&this->data[start], c, size);
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}
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}
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void I2CProm::set_memory(int start, const uint8_t* in_data, int size)
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{
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if ((start + size) <= this->rom_size) {
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std::memcpy(&this->data[start], in_data, size);
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}
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}
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void I2CProm::start_transaction() {
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this->pos = 0;
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};
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bool I2CProm::send_subaddress(uint8_t sub_addr) {
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this->pos = sub_addr;
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return true;
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};
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bool I2CProm::send_byte(uint8_t data) {
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LOG_F(9, "I2CRom: 0x%X received", data);
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return true;
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};
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bool I2CProm::receive_byte(uint8_t* p_data) {
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if (this->pos >= this->rom_size) {
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this->pos = 0; // attempt to read past last byte should wrap around
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}
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*p_data = this->data[this->pos++];
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return true;
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};
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