mirror of
https://github.com/dingusdev/dingusppc.git
synced 2024-12-30 18:30:08 +00:00
76 lines
1.9 KiB
C
76 lines
1.9 KiB
C
|
/*
|
||
|
|
DingusPPC - The Experimental PowerPC Macintosh emulator
|
||
|
|
Copyright (C) 2018-22 divingkatae and maximum
|
||
|
|
(theweirdo) spatium
|
||
|
|
|
||
|
|
(Contact divingkatae#1017 or powermax#2286 on Discord for more info)
|
||
|
|
|
||
|
|
This program is free software: you can redistribute it and/or modify
|
||
|
|
it under the terms of the GNU General Public License as published by
|
||
|
|
the Free Software Foundation, either version 3 of the License, or
|
||
|
|
(at your option) any later version.
|
||
|
|
|
||
|
|
This program is distributed in the hope that it will be useful,
|
||
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
|
|
GNU General Public License for more details.
|
||
|
|
|
||
|
|
You should have received a copy of the GNU General Public License
|
||
|
|
along with this program. If not, see <https://www.gnu.org/licenses/>.
|
||
|
|
*/
|
||
|
|
|
||
|
|
/** @file Athens clock generator definitions. */
|
||
|
|
|
||
|
|
#ifndef ATHENS_H
|
||
|
|
#define ATHENS_H
|
||
|
|
|
||
|
|
#include <devices/common/hwcomponent.h>
|
||
|
|
#include <devices/common/i2c/i2c.h>
|
||
|
|
|
||
|
|
#include <cinttypes>
|
||
|
|
|
||
|
|
#define ATHENS_NUM_REGS 8
|
||
|
|
|
||
|
|
constexpr auto ATHENS_XTAL = 31334400.0f; // external crystal oscillator frequency
|
||
|
|
|
||
|
|
namespace AthensRegs {
|
||
|
|
|
||
|
|
enum AthensRegs: uint8_t {
|
||
|
|
ID = 0,
|
||
|
|
D2 = 1,
|
||
|
|
N2 = 2,
|
||
|
|
P2_MUX2 = 3,
|
||
|
|
VN_CTRL = 4, // vendor specific control bits
|
||
|
|
BD1 = 5,
|
||
|
|
BN1 = 6,
|
||
|
|
P1 = 7
|
||
|
|
};
|
||
|
|
|
||
|
|
}; // namespace AthensRegs
|
||
|
|
|
||
|
|
class AthensClocks : public I2CDevice, public HWComponent
|
||
|
|
{
|
||
|
|
public:
|
||
|
|
AthensClocks(uint8_t dev_addr);
|
||
|
|
~AthensClocks() = default;
|
||
|
|
|
||
|
|
// I2CDevice methods
|
||
|
|
void start_transaction();
|
||
|
|
bool send_subaddress(uint8_t sub_addr);
|
||
|
|
bool send_byte(uint8_t data);
|
||
|
|
bool receive_byte(uint8_t* p_data);
|
||
|
|
|
||
|
|
// methods for querying virtual frequences
|
||
|
|
int get_sys_freq();
|
||
|
|
int get_dot_freq();
|
||
|
|
|
||
|
|
private:
|
||
|
|
uint8_t my_addr = 0;
|
||
|
|
uint8_t reg_num = 0;
|
||
|
|
int pos = 0;
|
||
|
|
|
||
|
|
uint8_t regs[ATHENS_NUM_REGS];
|
||
|
|
};
|
||
|
|
|
||
|
|
#endif // ATHENS_H
|