/* LUFA Library Copyright (C) Dean Camera, 2014. dean [at] fourwalledcubicle [dot] com www.lufa-lib.org */ /* Copyright 2014 Dean Camera (dean [at] fourwalledcubicle [dot] com) Permission to use, copy, modify, distribute, and sell this software and its documentation for any purpose is hereby granted without fee, 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 disclaims 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 * * V2Protocol handler, to process V2 Protocol commands used in Atmel programmer devices. */ #define INCLUDE_FROM_V2PROTOCOL_C #include "V2Protocol.h" /** Current memory address for FLASH/EEPROM memory read/write commands */ uint32_t CurrentAddress; /** Flag to indicate that the next read/write operation must update the device's current extended FLASH address */ bool MustLoadExtendedAddress; /** ISR to manage timeouts whilst processing a V2Protocol command */ ISR(TIMER0_COMPA_vect, ISR_NOBLOCK) { if (TimeoutTicksRemaining) TimeoutTicksRemaining--; else TCCR0B = 0; } /** Initializes the hardware and software associated with the V2 protocol command handling. */ void V2Protocol_Init(void) { #if defined(ADC) && !defined(NO_VTARGET_DETECT) /* Initialize the ADC converter for VTARGET level detection on supported AVR models */ ADC_Init(ADC_FREE_RUNNING | ADC_PRESCALE_128); ADC_SetupChannel(VTARGET_ADC_CHANNEL); ADC_StartReading(VTARGET_REF_MASK | ADC_RIGHT_ADJUSTED | VTARGET_ADC_CHANNEL_MASK); #endif /* Timeout timer initialization (~10ms period) */ OCR0A = (((F_CPU / 1024) / 100) - 1); TCCR0A = (1 << WGM01); TIMSK0 = (1 << OCIE0A); V2Params_LoadNonVolatileParamValues(); #if defined(ENABLE_ISP_PROTOCOL) ISPTarget_ConfigureRescueClock(); #endif } /** Master V2 Protocol packet handler, for received V2 Protocol packets from a connected host. * This routine decodes the issued command and passes off the handling of the command to the * appropriate function. */ void V2Protocol_ProcessCommand(void) { uint8_t V2Command = Endpoint_Read_8(); /* Reset timeout counter duration and start the timer */ TimeoutTicksRemaining = COMMAND_TIMEOUT_TICKS; TCCR0B = ((1 << CS02) | (1 << CS00)); switch (V2Command) { case CMD_SIGN_ON: V2Protocol_SignOn(); break; case CMD_SET_PARAMETER: case CMD_GET_PARAMETER: V2Protocol_GetSetParam(V2Command); break; case CMD_LOAD_ADDRESS: V2Protocol_LoadAddress(); break; case CMD_RESET_PROTECTION: V2Protocol_ResetProtection(); break; #if defined(ENABLE_ISP_PROTOCOL) case CMD_ENTER_PROGMODE_ISP: ISPProtocol_EnterISPMode(); break; case CMD_LEAVE_PROGMODE_ISP: ISPProtocol_LeaveISPMode(); break; case CMD_PROGRAM_FLASH_ISP: case CMD_PROGRAM_EEPROM_ISP: ISPProtocol_ProgramMemory(V2Command); break; case CMD_READ_FLASH_ISP: case CMD_READ_EEPROM_ISP: ISPProtocol_ReadMemory(V2Command); break; case CMD_CHIP_ERASE_ISP: ISPProtocol_ChipErase(); break; case CMD_READ_FUSE_ISP: case CMD_READ_LOCK_ISP: case CMD_READ_SIGNATURE_ISP: case CMD_READ_OSCCAL_ISP: ISPProtocol_ReadFuseLockSigOSCCAL(V2Command); break; case CMD_PROGRAM_FUSE_ISP: case CMD_PROGRAM_LOCK_ISP: ISPProtocol_WriteFuseLock(V2Command); break; case CMD_SPI_MULTI: ISPProtocol_SPIMulti(); break; #endif #if defined(ENABLE_XPROG_PROTOCOL) case CMD_XPROG_SETMODE: XPROGProtocol_SetMode(); break; case CMD_XPROG: XPROGProtocol_Command(); break; #endif default: V2Protocol_UnknownCommand(V2Command); break; } /* Disable the timeout management timer */ TCCR0B = 0; Endpoint_WaitUntilReady(); Endpoint_SelectEndpoint(AVRISP_DATA_OUT_EPADDR); Endpoint_SetEndpointDirection(ENDPOINT_DIR_OUT); } /** Handler for unknown V2 protocol commands. This discards all sent data and returns a * STATUS_CMD_UNKNOWN status back to the host. * * \param[in] V2Command Issued V2 Protocol command byte from the host */ static void V2Protocol_UnknownCommand(const uint8_t V2Command) { /* Discard all incoming data */ while (Endpoint_BytesInEndpoint() == AVRISP_DATA_EPSIZE) { Endpoint_ClearOUT(); Endpoint_WaitUntilReady(); } Endpoint_ClearOUT(); Endpoint_SelectEndpoint(AVRISP_DATA_IN_EPADDR); Endpoint_SetEndpointDirection(ENDPOINT_DIR_IN); Endpoint_Write_8(V2Command); Endpoint_Write_8(STATUS_CMD_UNKNOWN); Endpoint_ClearIN(); } /** Handler for the CMD_SIGN_ON command, returning the programmer ID string to the host. */ static void V2Protocol_SignOn(void) { Endpoint_ClearOUT(); Endpoint_SelectEndpoint(AVRISP_DATA_IN_EPADDR); Endpoint_SetEndpointDirection(ENDPOINT_DIR_IN); Endpoint_Write_8(CMD_SIGN_ON); Endpoint_Write_8(STATUS_CMD_OK); Endpoint_Write_8(sizeof(PROGRAMMER_ID) - 1); Endpoint_Write_Stream_LE(PROGRAMMER_ID, (sizeof(PROGRAMMER_ID) - 1), NULL); Endpoint_ClearIN(); } /** Handler for the CMD_RESET_PROTECTION command, implemented as a dummy ACK function as * no target short-circuit protection is currently implemented. */ static void V2Protocol_ResetProtection(void) { Endpoint_ClearOUT(); Endpoint_SelectEndpoint(AVRISP_DATA_IN_EPADDR); Endpoint_SetEndpointDirection(ENDPOINT_DIR_IN); Endpoint_Write_8(CMD_RESET_PROTECTION); Endpoint_Write_8(STATUS_CMD_OK); Endpoint_ClearIN(); } /** Handler for the CMD_SET_PARAMETER and CMD_GET_PARAMETER commands from the host, setting or * getting a device parameter's value from the parameter table. * * \param[in] V2Command Issued V2 Protocol command byte from the host */ static void V2Protocol_GetSetParam(const uint8_t V2Command) { uint8_t ParamID = Endpoint_Read_8(); uint8_t ParamValue; if (V2Command == CMD_SET_PARAMETER) ParamValue = Endpoint_Read_8(); Endpoint_ClearOUT(); Endpoint_SelectEndpoint(AVRISP_DATA_IN_EPADDR); Endpoint_SetEndpointDirection(ENDPOINT_DIR_IN); Endpoint_Write_8(V2Command); uint8_t ParamPrivs = V2Params_GetParameterPrivileges(ParamID); if ((V2Command == CMD_SET_PARAMETER) && (ParamPrivs & PARAM_PRIV_WRITE)) { Endpoint_Write_8(STATUS_CMD_OK); V2Params_SetParameterValue(ParamID, ParamValue); } else if ((V2Command == CMD_GET_PARAMETER) && (ParamPrivs & PARAM_PRIV_READ)) { Endpoint_Write_8(STATUS_CMD_OK); Endpoint_Write_8(V2Params_GetParameterValue(ParamID)); } else { Endpoint_Write_8(STATUS_CMD_FAILED); } Endpoint_ClearIN(); } /** Handler for the CMD_LOAD_ADDRESS command, loading the given device address into a * global storage variable for later use, and issuing LOAD EXTENDED ADDRESS commands * to the attached device as required. */ static void V2Protocol_LoadAddress(void) { Endpoint_Read_Stream_BE(&CurrentAddress, sizeof(CurrentAddress), NULL); Endpoint_ClearOUT(); Endpoint_SelectEndpoint(AVRISP_DATA_IN_EPADDR); Endpoint_SetEndpointDirection(ENDPOINT_DIR_IN); if (CurrentAddress & (1UL << 31)) MustLoadExtendedAddress = true; Endpoint_Write_8(CMD_LOAD_ADDRESS); Endpoint_Write_8(STATUS_CMD_OK); Endpoint_ClearIN(); } a id='n125' href='#n125'>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