-/*\r
- LUFA Library\r
- Copyright (C) Dean Camera, 2009.\r
- \r
- dean [at] fourwalledcubicle [dot] com\r
- www.fourwalledcubicle.com\r
-*/\r
-\r
-/*\r
- Copyright 2009 Dean Camera (dean [at] fourwalledcubicle [dot] com)\r
-\r
- Permission to use, copy, modify, and distribute this software\r
- and its documentation for any purpose and without fee is hereby\r
- granted, provided that the above copyright notice appear in all\r
- copies and that both that the copyright notice and this\r
- permission notice and warranty disclaimer appear in supporting\r
- documentation, and that the name of the author not be used in\r
- advertising or publicity pertaining to distribution of the\r
- software without specific, written prior permission.\r
-\r
- The author disclaim all warranties with regard to this\r
- software, including all implied warranties of merchantability\r
- and fitness. In no event shall the author be liable for any\r
- special, indirect or consequential damages or any damages\r
- whatsoever resulting from loss of use, data or profits, whether\r
- in an action of contract, negligence or other tortious action,\r
- arising out of or in connection with the use or performance of\r
- this software.\r
-*/\r
-\r
-/** \file\r
- *\r
- * Target-related functions for the ISP Protocol decoder.\r
- */\r
-\r
-#include "V2ProtocolTarget.h"\r
-\r
-/** Converts the given AVR Studio SCK duration parameter (set by a SET PARAM command from the host) to the nearest\r
- * possible SPI clock prescaler mask for passing to the SPI_Init() routine.\r
- *\r
- * \return Nearest SPI prescaler mask for the given SCK frequency\r
- */\r
-uint8_t ISPTarget_GetSPIPrescalerMask(void)\r
-{\r
- static const uint8_t SPIMaskFromSCKDuration[] =\r
- {\r
- #if (F_CPU == 8000000)\r
- SPI_SPEED_FCPU_DIV_2, // AVRStudio = 8MHz SPI, Actual = 4MHz SPI\r
- SPI_SPEED_FCPU_DIV_2, // AVRStudio = 4MHz SPI, Actual = 4MHz SPI\r
- SPI_SPEED_FCPU_DIV_4, // AVRStudio = 2MHz SPI, Actual = 2MHz SPI\r
- SPI_SPEED_FCPU_DIV_8, // AVRStudio = 1MHz SPI, Actual = 1MHz SPI\r
- SPI_SPEED_FCPU_DIV_16, // AVRStudio = 500KHz SPI, Actual = 500KHz SPI\r
- SPI_SPEED_FCPU_DIV_32, // AVRStudio = 250KHz SPI, Actual = 250KHz SPI\r
- SPI_SPEED_FCPU_DIV_64 // AVRStudio = 125KHz SPI, Actual = 125KHz SPI \r
- #elif (F_CPU == 16000000)\r
- SPI_SPEED_FCPU_DIV_2, // AVRStudio = 8MHz SPI, Actual = 8MHz SPI\r
- SPI_SPEED_FCPU_DIV_4, // AVRStudio = 4MHz SPI, Actual = 4MHz SPI\r
- SPI_SPEED_FCPU_DIV_8, // AVRStudio = 2MHz SPI, Actual = 2MHz SPI\r
- SPI_SPEED_FCPU_DIV_16, // AVRStudio = 1MHz SPI, Actual = 1MHz SPI\r
- SPI_SPEED_FCPU_DIV_32, // AVRStudio = 500KHz SPI, Actual = 500KHz SPI\r
- SPI_SPEED_FCPU_DIV_64, // AVRStudio = 250KHz SPI, Actual = 250KHz SPI \r
- SPI_SPEED_FCPU_DIV_128 // AVRStudio = 125KHz SPI, Actual = 125KHz SPI\r
- #else\r
- #error No SPI prescaler masks for chosen F_CPU speed.\r
- #endif\r
- };\r
-\r
- uint8_t SCKDuration = V2Params_GetParameterValue(PARAM_SCK_DURATION);\r
-\r
- if (SCKDuration >= sizeof(SPIMaskFromSCKDuration))\r
- SCKDuration = (sizeof(SPIMaskFromSCKDuration) - 1);\r
- \r
- return SPIMaskFromSCKDuration[SCKDuration];\r
-}\r
-\r
-/** Asserts or deasserts the target's reset line, using the correct polarity as set by the host using a SET PARAM command.\r
- * When not asserted, the line is tristated so as not to interfere with normal device operation.\r
- *\r
- * \param[in] ResetTarget Boolean true when the target should be held in reset, false otherwise\r
- */\r
-void ISPTarget_ChangeTargetResetLine(bool ResetTarget)\r
-{\r
- if (ResetTarget)\r
- {\r
- RESET_LINE_DDR |= RESET_LINE_MASK;\r
- \r
- if (!(V2Params_GetParameterValue(PARAM_RESET_POLARITY)))\r
- RESET_LINE_PORT |= RESET_LINE_MASK;\r
- }\r
- else\r
- {\r
- RESET_LINE_DDR &= ~RESET_LINE_MASK;\r
- RESET_LINE_PORT &= ~RESET_LINE_MASK;\r
- }\r
-}\r
-\r
-/** Waits until the last issued target memory programming command has completed, via the check mode given and using\r
- * the given parameters.\r
- *\r
- * \param[in] ProgrammingMode Programming mode used and completion check to use, a mask of PROG_MODE_* constants\r
- * \param[in] PollAddress Memory address to poll for completion if polling check mode used\r
- * \param[in] PollValue Poll value to check against if polling check mode used\r
- * \param[in] DelayMS Milliseconds to delay before returning if delay check mode used\r
- * \param[in] ReadMemCommand Device low-level READ MEMORY command to send if value check mode used\r
- *\r
- * \return V2 Protocol status \ref STATUS_CMD_OK if the no timeout occurred, \ref STATUS_RDY_BSY_TOUT or\r
- * \ref STATUS_CMD_TOUT otherwise\r
- */\r
-uint8_t ISPTarget_WaitForProgComplete(uint8_t ProgrammingMode, uint16_t PollAddress, uint8_t PollValue,\r
- uint8_t DelayMS, uint8_t ReadMemCommand)\r
-{\r
- uint8_t ProgrammingStatus = STATUS_CMD_OK;\r
-\r
- /* Determine method of Programming Complete check */\r
- switch (ProgrammingMode & ~(PROG_MODE_PAGED_WRITES_MASK | PROG_MODE_COMMIT_PAGE_MASK))\r
- {\r
- case PROG_MODE_WORD_TIMEDELAY_MASK:\r
- case PROG_MODE_PAGED_TIMEDELAY_MASK:\r
- V2Protocol_DelayMS(DelayMS);\r
- break;\r
- case PROG_MODE_WORD_VALUE_MASK:\r
- case PROG_MODE_PAGED_VALUE_MASK:\r
- TCNT0 = 0;\r
-\r
- do\r
- {\r
- SPI_SendByte(ReadMemCommand);\r
- SPI_SendByte(PollAddress >> 8);\r
- SPI_SendByte(PollAddress & 0xFF); \r
- }\r
- while ((SPI_TransferByte(0x00) != PollValue) && (TCNT0 < TARGET_BUSY_TIMEOUT_MS));\r
-\r
- if (TCNT0 >= TARGET_BUSY_TIMEOUT_MS)\r
- ProgrammingStatus = STATUS_CMD_TOUT;\r
- \r
- break; \r
- case PROG_MODE_WORD_READYBUSY_MASK:\r
- case PROG_MODE_PAGED_READYBUSY_MASK:\r
- ProgrammingStatus = ISPTarget_WaitWhileTargetBusy();\r
- break;\r
- }\r
-\r
- return ProgrammingStatus;\r
-}\r
-\r
-/** Waits until the target has completed the last operation, by continuously polling the device's\r
- * BUSY flag until it is cleared, or until the \ref TARGET_BUSY_TIMEOUT_MS timeout period has expired.\r
- *\r
- * \return V2 Protocol status \ref STATUS_CMD_OK if the no timeout occurred, \ref STATUS_RDY_BSY_TOUT otherwise\r
- */\r
-uint8_t ISPTarget_WaitWhileTargetBusy(void)\r
-{\r
- TCNT0 = 0;\r
- \r
- do\r
- {\r
- SPI_SendByte(0xF0);\r
- SPI_SendByte(0x00);\r
-\r
- SPI_SendByte(0x00);\r
- }\r
- while ((SPI_ReceiveByte() & 0x01) && (TCNT0 < TARGET_BUSY_TIMEOUT_MS));\r
-\r
- if (TCNT0 >= TARGET_BUSY_TIMEOUT_MS)\r
- return STATUS_RDY_BSY_TOUT;\r
- else\r
- return STATUS_CMD_OK;\r
-}\r
-\r
-/** Sends a low-level LOAD EXTENDED ADDRESS command to the target, for addressing of memory beyond the\r
- * 64KB boundary. This sends the command with the correct address as indicated by the current address\r
- * pointer variable set by the host when a SET ADDRESS command is issued.\r
- */\r
-void ISPTarget_LoadExtendedAddress(void)\r
-{\r
- SPI_SendByte(0x4D);\r
- SPI_SendByte(0x00);\r
- SPI_SendByte((CurrentAddress & 0x00FF0000) >> 16);\r
- SPI_SendByte(0x00); \r
-}\r
projects / pub / USBasp.git / commitdiff