diff options
Diffstat (limited to 'lib/lufa/Projects/AVRISP-MKII/Lib/V2Protocol.c')
| -rw-r--r-- | lib/lufa/Projects/AVRISP-MKII/Lib/V2Protocol.c | 267 |
1 files changed, 267 insertions, 0 deletions
diff --git a/lib/lufa/Projects/AVRISP-MKII/Lib/V2Protocol.c b/lib/lufa/Projects/AVRISP-MKII/Lib/V2Protocol.c new file mode 100644 index 0000000000..fd64c5a1e8 --- /dev/null +++ b/lib/lufa/Projects/AVRISP-MKII/Lib/V2Protocol.c @@ -0,0 +1,267 @@ +/* + LUFA Library + Copyright (C) Dean Camera, 2017. + + dean [at] fourwalledcubicle [dot] com + www.lufa-lib.org +*/ + +/* + Copyright 2017 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(); +} + |