aboutsummaryrefslogtreecommitdiffstats
path: root/Demos/Host/LowLevel/StillImageHost/StillImageHost.c
blob: c4aadb1bb0cbe18e58be7595f86a1a26a6ecf448 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
/*
             LUFA Library
     Copyright (C) Dean Camera, 2009.
              
  dean [at] fourwalledcubicle [dot] com
      www.fourwalledcubicle.com
*/

/*
  Copyright 2009  Dean Camera (dean [at] fourwalledcubicle [dot] com)

  Permission to use, copy, modify, and distribute this software
  and its documentation for any purpose and without fee is hereby
  granted, provided that the above copyright notice appear in all
  copies and that both that the copyright notice and this
  permission notice and warranty disclaimer appear in supporting
  documentation, and that the name of the author not be used in
  advertising or publicity pertaining to distribution of the
  software without specific, written prior permission.

  The author disclaim all warranties with regard to this
  software, including all implied warranties of merchantability
  and fitness.  In no event shall the author be liable for any
  special, indirect or consequential damages or any damages
  whatsoever resulting from loss of use, data or profits, whether
  in an action of contract, negligence or other tortious action,
  arising out of or in connection with the use or performance of
  this software.
*/

/** \file
 *
 *  Main source file for the StillImageHost demo. This file contains the main tasks of
 *  the demo and is responsible for the initial application hardware configuration.
 */

#include "StillImageHost.h"

/** Main program entry point. This routine configures the hardware required by the application, then
 *  enters a loop to run the application tasks in sequence.
 */
int main(void)
{
	SetupHardware();

	puts_P(PSTR(ESC_FG_CYAN "Still Image Host Demo running.\r\n" ESC_FG_WHITE));

	LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);

	for (;;)
	{
		StillImage_Task();
		USB_USBTask();
	}
}

/** Configures the board hardware and chip peripherals for the demo's functionality. */
void SetupHardware(void)
{
	/* Disable watchdog if enabled by bootloader/fuses */
	MCUSR &= ~(1 << WDRF);
	wdt_disable();

	/* Disable Clock Division */
	CLKPR = (1 << CLKPCE);
	CLKPR = 0;

	/* Hardware Initialization */
	SerialStream_Init(9600, false);
	LEDs_Init();
	USB_Init();
}

/** Event handler for the USB_DeviceAttached event. This indicates that a device has been attached to the host, and
 *  starts the library USB task to begin the enumeration and USB management process.
 */
void EVENT_USB_Host_DeviceAttached(void)
{
	puts_P(PSTR(ESC_FG_GREEN "Device Attached.\r\n" ESC_FG_WHITE));
	LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
}

/** Event handler for the USB_DeviceUnattached event. This indicates that a device has been removed from the host, and
 *  stops the library USB task management process.
 */
void EVENT_USB_Host_DeviceUnattached(void)
{
	puts_P(PSTR(ESC_FG_GREEN "\r\nDevice Unattached.\r\n" ESC_FG_WHITE));
	LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
}

/** Event handler for the USB_DeviceEnumerationComplete event. This indicates that a device has been successfully
 *  enumerated by the host and is now ready to be used by the application.
 */
void EVENT_USB_Host_DeviceEnumerationComplete(void)
{
	LEDs_SetAllLEDs(LEDMASK_USB_READY);
}

/** Event handler for the USB_HostError event. This indicates that a hardware error occurred while in host mode. */
void EVENT_USB_Host_HostError(const uint8_t ErrorCode)
{
	USB_ShutDown();

	printf_P(PSTR(ESC_FG_RED "Host Mode Error\r\n"
	                         " -- Error Code %d\r\n" ESC_FG_WHITE), ErrorCode);

	LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
	for(;;);
}

/** Event handler for the USB_DeviceEnumerationFailed event. This indicates that a problem occurred while
 *  enumerating an attached USB device.
 */
void EVENT_USB_Host_DeviceEnumerationFailed(const uint8_t ErrorCode, const uint8_t SubErrorCode)
{
	printf_P(PSTR(ESC_FG_RED "Dev Enum Error\r\n"
	                         " -- Error Code %d\r\n"
	                         " -- Sub Error Code %d\r\n"
	                         " -- In State %d\r\n" ESC_FG_WHITE), ErrorCode, SubErrorCode, USB_HostState);
	
	LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
}

/** Task to set the configuration of the attached device after it has been enumerated, and to print device information
 *  through the serial port.
 */
void StillImage_Task(void)
{
	uint8_t ErrorCode;

	switch (USB_HostState)
	{
		case HOST_STATE_Addressed:
			puts_P(PSTR("Getting Config Data.\r\n"));
		
			/* Get and process the configuration descriptor data */
			if ((ErrorCode = ProcessConfigurationDescriptor()) != SuccessfulConfigRead)
			{
				if (ErrorCode == ControlError)
				  puts_P(PSTR(ESC_FG_RED "Control Error (Get Configuration).\r\n"));
				else
				  puts_P(PSTR(ESC_FG_RED "Invalid Device.\r\n"));

				printf_P(PSTR(" -- Error Code: %d\r\n" ESC_FG_WHITE), ErrorCode);
				
				/* Indicate error via status LEDs */
				LEDs_SetAllLEDs(LEDMASK_USB_ERROR);

				/* Wait until USB device disconnected */
				USB_HostState = HOST_STATE_WaitForDeviceRemoval;
				break;
			}

			/* Set the device configuration to the first configuration (rarely do devices use multiple configurations) */
			if ((ErrorCode = USB_Host_SetDeviceConfiguration(1)) != HOST_SENDCONTROL_Successful)
			{
				printf_P(PSTR(ESC_FG_RED "Control Error (Set Configuration).\r\n"
				                         " -- Error Code: %d\r\n" ESC_FG_WHITE), ErrorCode);

				/* Indicate error via status LEDs */
				LEDs_SetAllLEDs(LEDMASK_USB_ERROR);

				/* Wait until USB device disconnected */
				USB_HostState = HOST_STATE_WaitForDeviceRemoval;
				break;
			}
				
			puts_P(PSTR("Still Image Device Enumerated.\r\n"));

			USB_HostState = HOST_STATE_Configured;
			break;
		case HOST_STATE_Configured:
			/* Indicate device busy via the status LEDs */
			LEDs_SetAllLEDs(LEDMASK_USB_BUSY);
			
			puts_P(PSTR("Retrieving Device Info...\r\n"));
			
			PIMA_SendBlock = (PIMA_Container_t)
				{
					.DataLength    = PIMA_COMMAND_SIZE(0),
					.Type          = CType_CommandBlock,
					.Code          = PIMA_OPERATION_GETDEVICEINFO,
					.TransactionID = 0x00000000,
					.Params        = {},
				};
			
			/* Send the GETDEVICEINFO block */
			SImage_SendBlockHeader();
			
			/* Receive the response data block */
			if ((ErrorCode = SImage_ReceiveBlockHeader()) != PIPE_RWSTREAM_NoError)
			{
				ShowCommandError(ErrorCode, false);
				
				USB_HostState = HOST_STATE_WaitForDeviceRemoval;
				break;
			}
			
			/* Calculate the size of the returned device info data structure */
			uint16_t DeviceInfoSize = (PIMA_ReceivedBlock.DataLength - PIMA_COMMAND_SIZE(0));
			
			/* Create a buffer large enough to hold the entire device info */
			uint8_t DeviceInfo[DeviceInfoSize];

			/* Read in the data block data (containing device info) */
			SImage_ReadData(DeviceInfo, DeviceInfoSize);
			
			/* Once all the data has been read, the pipe must be cleared before the response can be sent */
			Pipe_ClearIN();
			
			/* Create a pointer for walking through the info dataset */
			uint8_t* DeviceInfoPos = DeviceInfo;
			
			/* Skip over the data before the unicode device information strings */
			DeviceInfoPos +=  8;                                          // Skip to VendorExtensionDesc String
			DeviceInfoPos += (1 + UNICODE_STRING_LENGTH(*DeviceInfoPos)); // Skip over VendorExtensionDesc String
			DeviceInfoPos +=  2;                                          // Skip over FunctionalMode
			DeviceInfoPos += (4 + (*(uint32_t*)DeviceInfoPos << 1));      // Skip over OperationCode Array
			DeviceInfoPos += (4 + (*(uint32_t*)DeviceInfoPos << 1));      // Skip over EventCode Array
			DeviceInfoPos += (4 + (*(uint32_t*)DeviceInfoPos << 1));      // Skip over DevicePropCode Array
			DeviceInfoPos += (4 + (*(uint32_t*)DeviceInfoPos << 1));      // Skip over ObjectFormatCode Array
			DeviceInfoPos += (4 + (*(uint32_t*)DeviceInfoPos << 1));      // Skip over ObjectFormatCode Array
			
			/* Extract and convert the Manufacturer Unicode string to ASCII and print it through the USART */
			char Manufacturer[*DeviceInfoPos];
			UnicodeToASCII(DeviceInfoPos, Manufacturer);
			printf_P(PSTR("   Manufacturer: %s\r\n"), Manufacturer);

			DeviceInfoPos += 1 + UNICODE_STRING_LENGTH(*DeviceInfoPos);   // Skip over Manufacturer String

			/* Extract and convert the Model Unicode string to ASCII and print it through the USART */
			char Model[*DeviceInfoPos];
			UnicodeToASCII(DeviceInfoPos, Model);
			printf_P(PSTR("   Model: %s\r\n"), Model);

			DeviceInfoPos += 1 + UNICODE_STRING_LENGTH(*DeviceInfoPos);   // Skip over Model String

			/* Extract and convert the Device Version Unicode string to ASCII and print it through the USART */
			char DeviceVersion[*DeviceInfoPos];
			UnicodeToASCII(DeviceInfoPos, DeviceVersion);
			printf_P(PSTR("   Device Version: %s\r\n"), DeviceVersion);

			/* Receive the final response block from the device */
			if ((ErrorCode = SImage_ReceiveBlockHeader()) != PIPE_RWSTREAM_NoError)
			{
				ShowCommandError(ErrorCode, false);
				
				USB_HostState = HOST_STATE_WaitForDeviceRemoval;
				break;
			}
			
			/* Verify that the command completed successfully */
			if ((PIMA_ReceivedBlock.Type != CType_ResponseBlock) || (PIMA_ReceivedBlock.Code != PIMA_RESPONSE_OK))
			{
				ShowCommandError(PIMA_ReceivedBlock.Code, true);
				
				USB_HostState = HOST_STATE_WaitForDeviceRemoval;
				break;
			}
			
			puts_P(PSTR("Opening Session...\r\n"));
			
			PIMA_SendBlock = (PIMA_Container_t)
				{
					.DataLength    = PIMA_COMMAND_SIZE(1),
					.Type          = CType_CommandBlock,
					.Code          = PIMA_OPERATION_OPENSESSION,
					.TransactionID = 0x00000000,
					.Params        = {0x00000001},
				};
			
			/* Send the OPENSESSION block, open a session with an ID of 0x0001 */
			SImage_SendBlockHeader();
			
			/* Receive the response block from the device */
			if ((ErrorCode = SImage_ReceiveBlockHeader()) != PIPE_RWSTREAM_NoError)
			{
				ShowCommandError(ErrorCode, false);
				
				USB_HostState = HOST_STATE_WaitForDeviceRemoval;
				break;
			}
			
			/* Verify that the command completed successfully */
			if ((PIMA_ReceivedBlock.Type != CType_ResponseBlock) || (PIMA_ReceivedBlock.Code != PIMA_RESPONSE_OK))
			{
				ShowCommandError(PIMA_ReceivedBlock.Code, true);
				
				USB_HostState = HOST_STATE_WaitForDeviceRemoval;
				break;
			}

			puts_P(PSTR("Closing Session...\r\n"));

			PIMA_SendBlock = (PIMA_Container_t)
				{
					.DataLength    = PIMA_COMMAND_SIZE(1),
					.Type          = CType_CommandBlock,
					.Code          = PIMA_OPERATION_CLOSESESSION,
					.TransactionID = 0x00000001,
					.Params        = {0x00000001},
				};
			
			/* Send the CLOSESESSION block, close the session with an ID of 0x0001 */
			SImage_SendBlockHeader();
			
			/* Receive the response block from the device */
			if ((ErrorCode = SImage_ReceiveBlockHeader()) != PIPE_RWSTREAM_NoError)
			{
				ShowCommandError(ErrorCode, false);
				
				USB_HostState = HOST_STATE_WaitForDeviceRemoval;
				break;
			}

			/* Verify that the command completed successfully */
			if ((PIMA_ReceivedBlock.Type != CType_ResponseBlock) || (PIMA_ReceivedBlock.Code != PIMA_RESPONSE_OK))
			{
				ShowCommandError(PIMA_ReceivedBlock.Code, true);
				
				USB_HostState = HOST_STATE_WaitForDeviceRemoval;
				break;
			}

			puts_P(PSTR("Done.\r\n"));

			/* Indicate device no longer busy */
			LEDs_SetAllLEDs(LEDMASK_USB_READY);
			
			USB_HostState = HOST_STATE_WaitForDeviceRemoval;
			break;
	}
}

/** Function to convert a given Unicode encoded string to ASCII. This function will only work correctly on Unicode
 *  strings which contain ASCII printable characters only.
 *
 *  \param[in] UnicodeString  Pointer to a Unicode encoded input string
 *  \param[out] Buffer        Pointer to a buffer where the converted ASCII string should be stored
 */
void UnicodeToASCII(uint8_t* UnicodeString, char* Buffer)
{
	/* Get the number of characters in the string, skip to the start of the string data */
	uint8_t CharactersRemaining = *(UnicodeString++);
	
	/* Loop through the entire unicode string */
	while (CharactersRemaining--)
	{
		/* Load in the next unicode character (only the lower byte, as only Unicode coded ASCII is supported) */
		*(Buffer++) = *UnicodeString;
		
		/* Jump to the next unicode character */
		UnicodeString += 2;
	}
	
	/* Null terminate the string */
	*Buffer = 0;
}

/** Displays a PIMA command error via the device's serial port.
 *
 *  \param[in] ErrorCode          Error code of the function which failed to complete successfully
 *  \param[in] ResponseCodeError  Indicates if the error is due to a command failed indication from the device, or a communication failure
 */
void ShowCommandError(uint8_t ErrorCode, bool ResponseCodeError)
{
	char* FailureType = ((ResponseCodeError) ? PSTR("Response Code != OK") : PSTR("Transaction Fail"));

	printf_P(PSTR(ESC_FG_RED "Command Error (%S).\r\n"
	                         " -- Error Code %d\r\n" ESC_FG_WHITE), FailureType, ErrorCode);
			
	/* Indicate error via status LEDs */
	LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
}