159 lines
3.8 KiB
C++
159 lines
3.8 KiB
C++
void mac_detect_ready_to_send_cmd() {
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if (!mac_ready_detected) {
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pinMode(DATA_MAC, INPUT);
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if (digitalRead(DATA_MAC) == LOW) {
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mac_ready_detected = true;
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}
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} else {
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if (mac_delay_start == 0) {
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mac_delay_start = micros();
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}
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if (micros() - mac_delay_start >= MAC_DETECT_READY_USEC) {
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mac_reset();
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macintosh_state = READ_CMD;
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}
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}
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}
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void mac_detect_ready_to_recv_data() {
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if (mac_delay_start == 0) {
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mac_delay_start = micros();
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pinMode(DATA_MAC, INPUT);
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}
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if (micros() - mac_delay_start >= 400) {
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if (digitalRead(DATA_MAC) == HIGH) {
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macintosh_state = WRITE_DATA;
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} else {
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macintosh_state = DETECT_READY_FOR_CMD;
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}
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mac_reset();
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}
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}
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void mac_read_data() {
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if (!mac_clock_started) {
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pinMode(DATA_MAC, INPUT);
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mac_clock_state = LOW;
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mac_clock_started = true;
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}
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if (mac_clock_state == LOW) {
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if (mac_clock_delay_start == 0) {
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digitalWrite(CLK_MAC, LOW);
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mac_clock_delay_start = micros();
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}
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if (micros() - mac_clock_delay_start >= CLOCK_READ_LOW_USEC) {
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mac_clock_state = HIGH;
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mac_clock_delay_start = 0;
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}
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}
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if (mac_clock_state == HIGH) {
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if (mac_clock_delay_start == 0) {
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digitalWrite(CLK_MAC, HIGH);
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mac_clock_delay_start = micros();
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if (digitalRead(DATA_MAC) == HIGH) {
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mac_data_read |= 1<<(7 - mac_clock_count);
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}
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}
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if (micros() - mac_clock_delay_start >= CLOCK_READ_HIGH_USEC) {
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if (mac_clock_count < 7) {
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mac_clock_state = LOW;
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mac_clock_delay_start = 0;
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mac_clock_count++;
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} else {
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last_mac_cmd = mac_data_read;
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mac_reset();
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macintosh_state = DETECT_READY_FOR_DATA;
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}
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}
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}
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}
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void mac_write_data() {
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if (!mac_clock_started) {
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if (last_mac_cmd == INQUIRY_CMD && kbd_last_data_read_index == -1) {
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if (mac_cmd_response_delay_start == 0) {
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mac_cmd_response_delay_start = millis();
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}
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if (millis() - mac_cmd_response_delay_start >= MAC_RESP_DELAY_MSEC) {
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goto WRITE_MAC;
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} else {
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return;
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}
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} else {
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WRITE_MAC:
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mac_data_write = mac_cmd_response_data();
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if (mac_data_write == BAD_CMD) {
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mac_reset();
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macintosh_state = DETECT_READY_FOR_CMD;
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return;
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} else {
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pinMode(DATA_MAC, OUTPUT);
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mac_clock_state = LOW;
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mac_clock_started = true;
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}
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}
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}
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if (mac_clock_state == LOW) {
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if (mac_clock_delay_start == 0) {
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digitalWrite(CLK_MAC, LOW);
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mac_clock_delay_start = micros();
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digitalWrite(DATA_MAC, mac_data_write>>(7 - mac_clock_count) & 1 > 0);
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}
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if (micros() - mac_clock_delay_start >= CLOCK_WRITE_LOW_USEC) {
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mac_clock_state = HIGH;
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mac_clock_delay_start = 0;
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}
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}
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if (mac_clock_state == HIGH) {
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if (mac_clock_delay_start == 0) {
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digitalWrite(CLK_MAC, HIGH);
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mac_clock_delay_start = micros();
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}
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if (micros() - mac_clock_delay_start >= CLOCK_WRITE_HIGH_USEC) {
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if (mac_clock_count < 7) {
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mac_clock_state = LOW;
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mac_clock_delay_start = 0;
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mac_clock_count++;
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} else {
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digitalWrite(DATA_MAC, HIGH);
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mac_reset();
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macintosh_state = DETECT_READY_FOR_CMD;
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}
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}
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}
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}
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byte mac_cmd_response_data() {
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switch (last_mac_cmd) {
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case MODEL_NUMBER_CMD:
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return model_number;
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case TEST_CMD:
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return TEST_ACK;
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case INSTANT_CMD:
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case INQUIRY_CMD:
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if (kbd_last_data_read_index == -1) {
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return NULL_TRANSITION;
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}
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byte inquiry_data = kbd_last_data_read[0];
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kbd_last_data_read[0] = kbd_last_data_read[1];
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kbd_last_data_read[1] = kbd_last_data_read[2];
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kbd_last_data_read[2] = kbd_last_data_read[3];
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kbd_last_data_read_index -= 1;
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return remap(inquiry_data);
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}
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}
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