Converted Host mode demos to schedulerless. Fixed host mode broken due to earlier...
[pub/USBasp.git] / Demos / Device / LowLevel / Joystick / Joystick.c
1 /*
2 LUFA Library
3 Copyright (C) Dean Camera, 2009.
4
5 dean [at] fourwalledcubicle [dot] com
6 www.fourwalledcubicle.com
7 */
8
9 /*
10 Copyright 2009 Dean Camera (dean [at] fourwalledcubicle [dot] com)
11
12 Permission to use, copy, modify, and distribute this software
13 and its documentation for any purpose and without fee is hereby
14 granted, provided that the above copyright notice appear in all
15 copies and that both that the copyright notice and this
16 permission notice and warranty disclaimer appear in supporting
17 documentation, and that the name of the author not be used in
18 advertising or publicity pertaining to distribution of the
19 software without specific, written prior permission.
20
21 The author disclaim all warranties with regard to this
22 software, including all implied warranties of merchantability
23 and fitness. In no event shall the author be liable for any
24 special, indirect or consequential damages or any damages
25 whatsoever resulting from loss of use, data or profits, whether
26 in an action of contract, negligence or other tortious action,
27 arising out of or in connection with the use or performance of
28 this software.
29 */
30
31 /** \file
32 *
33 * Main source file for the Joystick demo. This file contains the main tasks of the demo and
34 * is responsible for the initial application hardware configuration.
35 */
36
37 #include "Joystick.h"
38
39 /** Main program entry point. This routine configures the hardware required by the application, then
40 * starts the scheduler to run the application tasks.
41 */
42 int main(void)
43 {
44 SetupHardware();
45
46 LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
47
48 for (;;)
49 {
50 HID_Task();
51 USB_USBTask();
52 }
53 }
54
55 /** Configures the board hardware and chip peripherals for the demo's functionality. */
56 void SetupHardware(void)
57 {
58 /* Disable watchdog if enabled by bootloader/fuses */
59 MCUSR &= ~(1 << WDRF);
60 wdt_disable();
61
62 /* Disable clock division */
63 clock_prescale_set(clock_div_1);
64
65 /* Hardware Initialization */
66 Joystick_Init();
67 LEDs_Init();
68 Buttons_Init();
69 USB_Init();
70 }
71
72 /** Event handler for the USB_Connect event. This indicates that the device is enumerating via the status LEDs and
73 * starts the library USB task to begin the enumeration and USB management process.
74 */
75 void EVENT_USB_Connect(void)
76 {
77 /* Indicate USB enumerating */
78 LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
79 }
80
81 /** Event handler for the USB_Disconnect event. This indicates that the device is no longer connected to a host via
82 * the status LEDs and stops the USB management and joystick reporting tasks.
83 */
84 void EVENT_USB_Disconnect(void)
85 {
86 /* Indicate USB not ready */
87 LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
88 }
89
90 /** Event handler for the USB_ConfigurationChanged event. This is fired when the host set the current configuration
91 * of the USB device after enumeration - the device endpoints are configured and the joystick reporting task started.
92 */
93 void EVENT_USB_ConfigurationChanged(void)
94 {
95 /* Setup Joystick Report Endpoint */
96 Endpoint_ConfigureEndpoint(JOYSTICK_EPNUM, EP_TYPE_INTERRUPT,
97 ENDPOINT_DIR_IN, JOYSTICK_EPSIZE,
98 ENDPOINT_BANK_SINGLE);
99
100 /* Indicate USB connected and ready */
101 LEDs_SetAllLEDs(LEDMASK_USB_READY);
102 }
103
104 /** Event handler for the USB_UnhandledControlPacket event. This is used to catch standard and class specific
105 * control requests that are not handled internally by the USB library (including the HID commands, which are
106 * all issued via the control endpoint), so that they can be handled appropriately for the application.
107 */
108 void EVENT_USB_UnhandledControlPacket(void)
109 {
110 /* Handle HID Class specific requests */
111 switch (USB_ControlRequest.bRequest)
112 {
113 case REQ_GetReport:
114 if (USB_ControlRequest.bmRequestType == (REQDIR_DEVICETOHOST | REQTYPE_CLASS | REQREC_INTERFACE))
115 {
116 USB_JoystickReport_Data_t JoystickReportData;
117
118 Endpoint_ClearSETUP();
119
120 /* Create the next HID report to send to the host */
121 GetNextReport(&JoystickReportData);
122
123 /* Write the report data to the control endpoint */
124 Endpoint_Write_Control_Stream_LE(&JoystickReportData, sizeof(JoystickReportData));
125
126 /* Finalize the stream transfer to send the last packet or clear the host abort */
127 Endpoint_ClearOUT();
128 }
129
130 break;
131 }
132 }
133
134 /** Fills the given HID report data structure with the next HID report to send to the host.
135 *
136 * \param ReportData Pointer to a HID report data structure to be filled
137 *
138 * \return Boolean true if the new report differs from the last report, false otherwise
139 */
140 bool GetNextReport(USB_JoystickReport_Data_t* ReportData)
141 {
142 static uint8_t PrevJoyStatus = 0;
143 static uint8_t PrevButtonStatus = 0;
144 uint8_t JoyStatus_LCL = Joystick_GetStatus();
145 uint8_t ButtonStatus_LCL = Buttons_GetStatus();
146 bool InputChanged = false;
147
148 /* Clear the report contents */
149 memset(ReportData, 0, sizeof(USB_JoystickReport_Data_t));
150
151 if (JoyStatus_LCL & JOY_UP)
152 ReportData->Y = -100;
153 else if (JoyStatus_LCL & JOY_DOWN)
154 ReportData->Y = 100;
155
156 if (JoyStatus_LCL & JOY_RIGHT)
157 ReportData->X = 100;
158 else if (JoyStatus_LCL & JOY_LEFT)
159 ReportData->X = -100;
160
161 if (JoyStatus_LCL & JOY_PRESS)
162 ReportData->Button = (1 << 1);
163
164 if (ButtonStatus_LCL & BUTTONS_BUTTON1)
165 ReportData->Button |= (1 << 0);
166
167 /* Check if the new report is different to the previous report */
168 InputChanged = (uint8_t)(PrevJoyStatus ^ JoyStatus_LCL) | (uint8_t)(PrevButtonStatus ^ ButtonStatus_LCL);
169
170 /* Save the current joystick status for later comparison */
171 PrevJoyStatus = JoyStatus_LCL;
172 PrevButtonStatus = ButtonStatus_LCL;
173
174 /* Return whether the new report is different to the previous report or not */
175 return InputChanged;
176 }
177
178 /** Function to manage HID report generation and transmission to the host. */
179 void HID_Task(void)
180 {
181 /* Check if the USB System is connected to a Host */
182 if (USB_IsConnected)
183 {
184 /* Select the Joystick Report Endpoint */
185 Endpoint_SelectEndpoint(JOYSTICK_EPNUM);
186
187 /* Check to see if the host is ready for another packet */
188 if (Endpoint_IsINReady())
189 {
190 USB_JoystickReport_Data_t JoystickReportData;
191
192 /* Create the next HID report to send to the host */
193 GetNextReport(&JoystickReportData);
194
195 /* Write Joystick Report Data */
196 Endpoint_Write_Stream_LE(&JoystickReportData, sizeof(JoystickReportData));
197
198 /* Finalize the stream transfer to send the last packet */
199 Endpoint_ClearIN();
200
201 /* Clear the report data afterwards */
202 memset(&JoystickReportData, 0, sizeof(JoystickReportData));
203 }
204 }
205 }