+/*\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 V2 Protocol decoder.\r
+ */\r
+\r
+#include "V2ProtocolTarget.h"\r
+\r
+/** Current memory address for FLASH/EEPROM memory read/write commands */\r
+uint32_t CurrentAddress;\r
+\r
+/** Table of masks for SPI_Init() from a given PARAM_SCK_DURATION value */\r
+static const uint8_t SPIMaskFromSCKDuration[] =\r
+ {\r
+ #if (F_CPU == 8000000)\r
+ SPI_SPEED_FCPU_DIV_2,\r
+ #endif\r
+ SPI_SPEED_FCPU_DIV_2, SPI_SPEED_FCPU_DIV_4, SPI_SPEED_FCPU_DIV_8,\r
+ SPI_SPEED_FCPU_DIV_16, SPI_SPEED_FCPU_DIV_32, SPI_SPEED_FCPU_DIV_64\r
+ #if (F_CPU == 16000000) \r
+ , SPI_SPEED_FCPU_DIV_128\r
+ #endif\r
+ };\r
+ \r
+\r
+uint8_t V2Protocol_GetSPIPrescalerMask(void)\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
+void V2Protocol_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_PORT &= ~RESET_LINE_MASK; \r
+ RESET_LINE_DDR &= ~RESET_LINE_MASK;\r
+ }\r
+}\r
+\r
+void V2Protocol_DelayMS(uint8_t MS)\r
+{\r
+ while (MS--)\r
+ _delay_ms(1);\r
+}\r
+\r
+uint8_t V2Protocol_WaitWhileTargetBusy(void)\r
+{\r
+ uint8_t TimeoutMS = TARGET_BUSY_TIMEOUT_MS;\r
+ uint8_t ResponseByte;\r
+ \r
+ do\r
+ {\r
+ V2Protocol_DelayMS(1);\r
+ \r
+ SPI_SendByte(0xF0);\r
+ SPI_SendByte(0x00);\r
+\r
+ SPI_SendByte(0x00);\r
+ ResponseByte = SPI_ReceiveByte();\r
+ }\r
+ while ((ResponseByte & 0x01) && (TimeoutMS--));\r
+\r
+ if (!(TimeoutMS))\r
+ return STATUS_CMD_TOUT;\r
+ else\r
+ return STATUS_CMD_OK;\r
+}\r
+\r
+void V2Protocol_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