mirror of
https://github.com/stratosonic/Apple-II-Joystick-to-USB-Adapter.git
synced 2024-06-05 21:29:36 +00:00
101 lines
3.2 KiB
C
101 lines
3.2 KiB
C
/**
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* Apple II Joystick to USB Adapter
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* www.flitey.com
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*/
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/** INCLUDES *******************************************************/
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#include "system.h"
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#include "usb.h"
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#include "usb_device_hid.h"
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#include "joystick.h"
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#include "app_led_usb_status.h"
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#include "eeprom.h"
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// Define default EEPROM data for min/max calibration values
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// [ X MIN ] [ X MID ] [ X MAX ] [ Y MIN ]
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__EEPROM_DATA(0x00, 0x00, 0x01, 0xFF, 0x03, 0xFF, 0x00, 0x00);
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// [ Y MID ] [ Y MAX ]
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__EEPROM_DATA(0x01, 0xFF, 0x03, 0xFF, 0x00, 0x00, 0x00, 0x00);
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/**
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* Main function
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*/
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void main(void) {
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// Initialize the buttons, LEDs, ADC
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SYSTEM_Initialize(SYSTEM_STATE_USB_START);
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// Check button states
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bool isSwitch0Pressed = BUTTON_IsPressed(GAME_SWITCH_0);
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bool isSwitch1Pressed = BUTTON_IsPressed(GAME_SWITCH_1);
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// If both switches are pressed, we will reset the calibration to the
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// standard values.
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if (isSwitch0Pressed == true && isSwitch1Pressed == true) {
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// First set the values to be used
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JoystickUseSavedCalibration(JOYSTICK_10_BIT_MIN, JOYSTICK_10_BIT_MID,
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JOYSTICK_10_BIT_MAX, JOYSTICK_10_BIT_MIN, JOYSTICK_10_BIT_MID,
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JOYSTICK_10_BIT_MAX);
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// And then save them to the EEPROM
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EepromWriteTwoBytes(X_AXIS_MIN_EEPROM_ADDRESS, JOYSTICK_10_BIT_MIN);
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EepromWriteTwoBytes(X_AXIS_MID_EEPROM_ADDRESS, JOYSTICK_10_BIT_MID);
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EepromWriteTwoBytes(X_AXIS_MAX_EEPROM_ADDRESS, JOYSTICK_10_BIT_MAX);
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EepromWriteTwoBytes(Y_AXIS_MIN_EEPROM_ADDRESS, JOYSTICK_10_BIT_MIN);
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EepromWriteTwoBytes(Y_AXIS_MID_EEPROM_ADDRESS, JOYSTICK_10_BIT_MID);
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EepromWriteTwoBytes(Y_AXIS_MAX_EEPROM_ADDRESS, JOYSTICK_10_BIT_MAX);
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} else if (isSwitch0Pressed == true || isSwitch1Pressed == true) {
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// If only one of the switches is pressed, we will run the calibration
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// routine to get the new values and save them to EEPROM
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JoystickRunCalibration();
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} else {
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// Otherwise, we will just retrieve the previous calibration values and
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// run with those.
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uint16_t x_min = EepromReadTwoBytes(X_AXIS_MIN_EEPROM_ADDRESS);
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uint16_t x_mid = EepromReadTwoBytes(X_AXIS_MID_EEPROM_ADDRESS);
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uint16_t x_max = EepromReadTwoBytes(X_AXIS_MAX_EEPROM_ADDRESS);
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uint16_t y_min = EepromReadTwoBytes(Y_AXIS_MIN_EEPROM_ADDRESS);
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uint16_t y_mid = EepromReadTwoBytes(Y_AXIS_MID_EEPROM_ADDRESS);
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uint16_t y_max = EepromReadTwoBytes(Y_AXIS_MAX_EEPROM_ADDRESS);
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JoystickUseSavedCalibration(x_min, x_mid, x_max, y_min, y_mid, y_max);
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}
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// Initialize USB
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USBDeviceInit();
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// Attach USB
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USBDeviceAttach();
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// Now just loop forever here
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while (1) {
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// We are using USB_POLLING so do USB tasks
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USBDeviceTasks();
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// If we are not configured, break from the loop
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if (USBGetDeviceState() < CONFIGURED_STATE) {
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continue;
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}
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// If we are suspended, break from the loop
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if (USBIsDeviceSuspended() == true) {
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continue;
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}
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// Perform joystick related actions
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JoystickTasks();
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}
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}
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