123 lines
2.6 KiB
C++
123 lines
2.6 KiB
C++
#define CLK_MAC 5
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#define DATA_MAC 6
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#define CLK_KBD 8
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#define DATA_KBD 7
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#define CLOCK_START_MSEC 500
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#define CLOCK_TRANSITION_USEC 300
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#define CLOCK_READ_LOW_USEC 180
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#define CLOCK_READ_HIGH_USEC 200
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#define CLOCK_WRITE_LOW_USEC 180
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#define CLOCK_WRITE_HIGH_USEC 200
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#define MAC_RESP_DELAY_MSEC 240
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#define MAC_DETECT_READY_USEC 300
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#define KBD_BUFFER_SIZE 4
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// command constants
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const byte MODEL_NUMBER_CMD = 0x16;
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const byte TEST_CMD = 0x36;
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const byte INQUIRY_CMD = 0x10;
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const byte INSTANT_CMD = 0x14;
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// command response constants
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const byte NULL_TRANSITION = 0x7B;
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const byte TEST_ACK = 0x7D;
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const byte TEST_NAK = 0x77;
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const byte BAD_CMD = 0x00;
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enum kbd_state {
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REQUIRE_MODEL_NUMBER,
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READ_MODEL_NUMBER,
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REQUIRE_TEST,
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READ_TEST,
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REQUIRE_INQUIRY,
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READ_INQUIRY,
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DELAY_INQUIRY
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};
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enum mac_state {
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DETECT_READY_FOR_CMD,
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READ_CMD,
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DETECT_READY_FOR_DATA,
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WRITE_DATA
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};
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// keyboard state variables
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kbd_state keyboard_state = REQUIRE_MODEL_NUMBER;
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boolean kbd_clock_detected;
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boolean kbd_clock_state;
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boolean kbd_clock_read;
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unsigned int kbd_clock_count;
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unsigned long kbd_clock_start;
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unsigned long kbd_clock_transition_start;
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unsigned long kbd_delay_start;
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byte kbd_data_read;
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byte kbd_last_data_read[KBD_BUFFER_SIZE];
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short kbd_last_data_read_index = -1;
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byte model_number;
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// macintosh state variables
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mac_state macintosh_state = DETECT_READY_FOR_CMD;
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boolean mac_ready_detected;
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unsigned long mac_delay_start;
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boolean mac_clock_started;
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boolean mac_clock_state;
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unsigned int mac_clock_count;
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unsigned long mac_clock_delay_start;
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unsigned long mac_cmd_response_delay_start;
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byte mac_data_read;
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byte last_mac_cmd;
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byte mac_data_write;
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void setup() {
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pinMode(CLK_MAC, OUTPUT);
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digitalWrite(CLK_MAC, HIGH);
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pinMode(CLK_KBD, INPUT);
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kbd_hard_reset();
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//Serial.begin(19200);
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}
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void loop() {
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switch (keyboard_state) {
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case REQUIRE_MODEL_NUMBER:
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send_data_to_kbd(MODEL_NUMBER_CMD, READ_MODEL_NUMBER);
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break;
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case READ_MODEL_NUMBER:
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read_data_from_kbd(REQUIRE_TEST);
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break;
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case REQUIRE_TEST:
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send_data_to_kbd(TEST_CMD, READ_TEST);
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break;
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case READ_TEST:
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read_data_from_kbd(REQUIRE_INQUIRY);
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break;
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case REQUIRE_INQUIRY:
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send_data_to_kbd(INQUIRY_CMD, READ_INQUIRY);
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break;
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case READ_INQUIRY:
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read_data_from_kbd(REQUIRE_INQUIRY);
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break;
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}
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switch (macintosh_state) {
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case DETECT_READY_FOR_CMD:
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mac_detect_ready_to_send_cmd();
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break;
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case READ_CMD:
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mac_read_data();
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break;
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case DETECT_READY_FOR_DATA:
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mac_detect_ready_to_recv_data();
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break;
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case WRITE_DATA:
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mac_write_data();
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break;
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}
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}
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