started reorganizing code into subfolders.
This commit is contained in:
Martin Preuss
600
avr/modules/flash/flashproto.asm
Normal file
600
avr/modules/flash/flashproto.asm
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@@ -0,0 +1,600 @@
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; ***************************************************************************
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; copyright : (C) 2023 by Martin Preuss
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; email : martin@libchipcard.de
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;
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; ***************************************************************************
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; * This file is part of the project "AqHome". *
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; * Please see toplevel file COPYING of that project for license details. *
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; ***************************************************************************
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.equ FLASH_ERROR_NONE = 0
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.equ FLASH_ERROR_MSGERROR = 1
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.equ FLASH_RECVBUFFER_MAXLEN = 128
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.equ FLASH_CMD_FLASH_RSP = 74
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.equ FLASH_MSG_OFFS_DESTADDR = 0
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.equ FLASH_MSG_OFFS_MSGLEN = 1
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.equ FLASH_MSG_OFFS_MSGDATA = 2
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.equ FLASH_MSG_OFFS_CMD = 2 ; first at COM2_MSG_OFFS_MSGDATA
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.equ FLASH_MSG_OFFS_SRCADDR = 3
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.equ FLASH_MSG_OFFS_PAYLOAD = 4 ; payload for the cmd follows here
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.equ FLASH_PACKET_DATA_OFFS_ADDR = FLASH_MSG_OFFS_PAYLOAD+0 ; 4 bytes
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.equ FLASH_PACKET_DATA_OFFS_DATA = FLASH_MSG_OFFS_PAYLOAD+4 ; n bytes
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.equ FLASH_PACKET_START_OFFS_UID = FLASH_MSG_OFFS_PAYLOAD+0 ; 4 bytes
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; ***************************************************************************
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; data
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.dseg
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flashDataBegin:
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flashUid: .byte 4
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flashSendBuffer: .byte 32
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flashRecvBuffer: .byte FLASH_RECVBUFFER_MAXLEN
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flashDataEnd:
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; ***************************************************************************
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; code
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.cseg
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FLASH_PROTO_BEGIN:
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bootLoader:
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cli ; disable interrupts throughout the whole process
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; setup stack
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.ifdef SPH ; if SPH is defined
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ldi r16, High(RAMEND)
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out SPH, r16 ; init MSB stack pointer
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.endif
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ldi r16, Low(RAMEND)
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out SPL, r16 ; init LSB stack pointer
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; rcall watchdogOff ; turn off watchdog timer (sometimes it stays on after reboot)
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; setup pins and interrupts
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cbi COM_PORT_DATA, COM_PINNUM_DATA ; disable internal pullup for DATA
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cbi COM_DDR_DATA, COM_PINNUM_DATA ; set DATA port as input
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cbi COM_PORT_ATTN, COM_PINNUM_ATTN ; disable internal pullup for ATTN
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cbi COM_DDR_ATTN, COM_PINNUM_ATTN ; set ATTN port as input
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sbi DDRA, PORTA3 ; out
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cbi PORTA, PORTA3 ; on
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sbi DDRA, PORTA2 ; out (debug)
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sbi PORTA, PORTA2 ; off (debug)
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rcall flashReadUid
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sts flashUid, r18
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sts flashUid+1, r19
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sts flashUid+2, r20
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sts flashUid+3, r21
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; wait for 3 secs before sending message
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ldi r16, 30
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rcall flashWaitForMulti100ms
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; send flash ready message
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ldi xl, LOW(flashSendBuffer)
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ldi xh, HIGH(flashSendBuffer)
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rcall flashWriteFlashReady
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rcall flashSendPacketUntilSuccess
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sbi PORTA, PORTA3 ; LED off
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bootLoader_loop1:
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; wait up to 10s for incoming FLASH_START message
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ldi r16, CPRO_CMD_FLASH_START
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ldi r17, 100 ; 100*100ms=10s
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rcall flashWaitForSpecificMessageWithLed
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brcc bootLoader_startFirmware
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; either FLASH_START or FLASH_END received
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cpi r16, CPRO_CMD_FLASH_START ; not FLASH_START, no flashing requested
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brne bootLoader_startFirmware
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; receive and flash new firmware
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rcall flashHandleFlashStart
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brcc bootLoader_loop1
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; received a FLASH START msg, handle flashing
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rcall bootLoaderFlash
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brcc bootLoader_waitAndRestartBootLoader
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; try to start firmware
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bootLoader_startFirmware:
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sbi PORTA, PORTA3 ; LED off
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ldi r16, 20
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rcall flashWaitForMulti100ms
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rjmp firmwareStart
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bootLoader_waitAndRestartBootLoader:
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sbi PORTA, PORTA3 ; LED off
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ldi r16, 20
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rcall flashWaitForMulti100ms
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rjmp bootLoader
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bootLoaderFlash:
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bootLoaderFlash_loop1:
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; wait up to 10s for incoming FLASH_DATA message
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ldi r16, CPRO_CMD_FLASH_DATA
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ldi r17, 100 ; 100*100ms=10s
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rcall flashWaitForSpecificMessageWithLed
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brcc bootLoaderFlash_error
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; either FLASH_DATA or FLASH_END received
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cpi r16, CPRO_CMD_FLASH_DATA ; not FLASH_DATA, flashing ended/aborted
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brne bootLoaderFlash_end
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; flash data
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rcall flashHandleFlashData
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rjmp bootLoaderFlash_loop1
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bootLoaderFlash_end:
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sec
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ret
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bootLoaderFlash_error:
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clc
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ret
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; ---------------------------------------------------------------------------
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; wait for a specific message to arrive within given time, flashing LED
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;
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; IN:
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; - R16: message type to receive
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; - R17: wait time in 100ms (1=100ms, 2=200ms etc.)
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; OUT:
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; - CFLAG: set if msg received (either expected msg or FLASH_END), cleared otherwise
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; - R16: message type received (if CFLAG set)
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; REGS: R2, R16, R17 (R1, R24, R25, X)
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flashWaitForSpecificMessageWithLed:
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mov r2, r16
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sbi PORTA, PORTA3 ; LED off
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flashWaitForSpecificMessageWithLed_loop:
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sbi PINA, PORTA3 ; toggle LED
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mov r16, r2
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push r17
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ldi r17, 100 ; wait up to 100ms
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rcall flashWaitForSpecificMessage ; (R1, R16, R17, R24, R25, X)
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pop r17
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brcs flashWaitForSpecificMessageWithLed_received
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dec r17
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brne flashWaitForSpecificMessageWithLed_loop
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sbi PORTA, PORTA3 ; off
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clc
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ret
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flashWaitForSpecificMessageWithLed_received:
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sbi PORTA, PORTA3 ; off
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sec
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ret
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; ---------------------------------------------------------------------------
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; wait for a specific message to arrive within given time.
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;
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; IN:
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; - R16: msg command to wait for
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; - R17: time to wait for packet (in milliseconds)
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; OUT:
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; - CFLAG: set if msg received, cleared on timeout
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; - R16 : message type received
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; REGS: R1, R16, R17, X (R24, R25)
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flashWaitForSpecificMessage:
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mov r1, r16 ; expected message type
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flashWaitForSpecificMessage_loop0:
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; wait for ATTN to go low
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flashWaitForSpecificMessage_loop1:
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ldi r16, 0 ; wait for low
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rcall flashWaitForAttnState1ms ; (R22, R24)
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brcs flashWaitForSpecificMessage_isLow
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dec r17
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brne flashWaitForSpecificMessage_loop1
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rjmp flashWaitForSpecificMessage_timeout
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; receive message
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flashWaitForSpecificMessage_isLow: ; is low, receive message, check for msg type
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push r17
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ldi r16, COM2_MAINTENANCE_ADDR
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ldi r17, FLASH_RECVBUFFER_MAXLEN-3
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ldi xl, LOW(flashRecvBuffer)
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ldi xh, HIGH(flashRecvBuffer)
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rcall com2ReceivePacketRaw
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pop r17
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brcc flashWaitForSpecificMessage_waitAttnHigh
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ldi xl, LOW(flashRecvBuffer)
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ldi xh, HIGH(flashRecvBuffer)
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adiw xh:xl, COM2_MSG_OFFS_CMD
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ld r16, X
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sbiw xh:xl, COM2_MSG_OFFS_CMD
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cp r16, r1
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breq flashWaitForSpecificMessage_received
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cpi r16, CPRO_CMD_FLASH_END
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breq flashWaitForSpecificMessage_received
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flashWaitForSpecificMessage_waitAttnHigh:
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dec r17
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breq flashWaitForSpecificMessage_timeout
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; wait for ATTN to go high
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flashWaitForSpecificMessage_loop2:
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ldi r16, 0xff ; wait for high
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rcall flashWaitForAttnState1ms ; (R22, R24)
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brcs flashWaitForSpecificMessage_isHigh
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dec r17
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brne flashWaitForSpecificMessage_loop2
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rjmp flashWaitForSpecificMessage_timeout
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flashWaitForSpecificMessage_isHigh:
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rjmp flashWaitForSpecificMessage_loop0
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flashWaitForSpecificMessage_received: ; R16 contains message type
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sec
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ret
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flashWaitForSpecificMessage_timeout:
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clc
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ret
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; ---------------------------------------------------------------------------
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; Wait for up to 1ms for ATTN line to reach the given state
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;
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; IN:
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; - R16: expected state (0xff for high, 0 for low)
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; OUT:
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; - CFLAG: set if state reached, cleared otherwise
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; REGS: R24 (R22)
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flashWaitForAttnState1ms:
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ldi r24, 100
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flashWaitForAttnState1ms_loop:
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push r17
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in r17, COM_PIN_ATTN
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eor r17, r16
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andi r17, (1<<COM_PINNUM_ATTN)
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pop r17
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breq flashWaitForAttnState1ms_stateReached
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Utils_WaitNanoSecs 10000, 0, r22 ; wait for 10us
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dec r24
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brne flashWaitForAttnState1ms_loop
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clc
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ret
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flashWaitForAttnState1ms_stateReached:
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sec
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ret
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; ---------------------------------------------------------------------------
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; wait indefinately until ATTN line is high, send packet over wire, retry until successfull
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;
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; IN:
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; - x : ptr to buffer to send
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; OUT:
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; - nothing
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; REGS: R15, R16, R22 (R17, R21, X)
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flashSendPacketUntilSuccess:
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push xl
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push xh
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rcall COM2_SendPacketWithAttn
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pop xh
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pop xl
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brcc flashSendPacket_error
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ret
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flashSendPacket_error:
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rcall flashWaitForAttnHigh
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rjmp flashSendPacketUntilSuccess
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; ---------------------------------------------------------------------------
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; wait indefinately for free ATTN line
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;
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; IN:
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; - nothing
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; OUT:
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; - nothing
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; REGS: R15, R16, R22 (R17, R21, X)
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flashWaitForAttnHigh:
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rcall com2WaitForAttnHigh ; waits for up to 100us
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brcc flashWaitForAttnHigh_stillLow
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ret
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flashWaitForAttnHigh_stillLow:
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rcall flashWaitDependingOnUid ; (R16, R18, R22, R24, R25)
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rjmp flashWaitForAttnHigh
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; ---------------------------------------------------------------------------
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; wait depending on lowest byte of uid.
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;
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; Wait interval is between 100ms and 25s (i.e. 255*100ms). This is used to avoid
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; all nodes on the network trying to send messages at the exact same time (e.g. after
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; power outage which would affect all nodes at the same time).
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;
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; IN:
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; - nothing
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; OUT:
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; - nothing
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; REGS: R16 (R18, R22, R24, R25)
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flashWaitDependingOnUid:
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lds r16, flashUid
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tst r16
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brne flashWaitDependingOnUid_l1
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ldi r16, 17
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flashWaitDependingOnUid_l1:
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rjmp flashWaitForMulti100ms
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; ---------------------------------------------------------------------------
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; wait for multiples of 100ms.
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;
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; IN:
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; - R16: number of 100ms loops
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; OUT:
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; - nothing
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; REGS: R16 (R18, R22, R24, R25)
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flashWaitForMulti100ms:
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flashWaitForMulti100ms_loop:
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rcall flashWaitFor100ms ; (R18, R22, R24, R25)
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dec r16
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brne flashWaitForMulti100ms_loop
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ret
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; ---------------------------------------------------------------------------
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; wait for 100 milliseconds.
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;
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; IN:
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; - nothing
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; OUT:
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; - nothing
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; REGS: R18 (R22, R24, R25)
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flashWaitFor100ms:
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ldi r18, 100
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flashWaitFor100ms_loop:
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rcall flashWaitFor1ms ; (R22, R24, R25)
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dec r18
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brne flashWaitFor100ms_loop
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ret
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; ---------------------------------------------------------------------------
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; wait for 1 millisecond.
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;
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; IN:
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; - nothing
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; OUT:
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; - nothing
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; REGS: R24 (R22)
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flashWaitFor1ms:
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ldi r24, 10
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flashWaitFor1ms_loop:
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Utils_WaitNanoSecs 100000, 0, r22 ; wait for 100us
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dec r24
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brne flashWaitFor1ms_loop
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ret
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||||
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||||
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||||
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; ---------------------------------------------------------------------------
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; Write a FLASH_RESPONSE packet.
|
||||
;
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||||
; IN:
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||||
; - R16: response code (0 if ok, error code otherwise)
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; - X : buffer to write to
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||||
; OUT:
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||||
; - nothing
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; MODIFIED REGS: R16, R17 (R18, R19, R20)
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flashWriteFlashRsp:
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clr r18
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st X+, r18 ; dest address (unused)
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ldi r18, 3 ; msg code+src address+one payload byte
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||||
st X+, r18 ; msg len
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ldi r17, CPRO_CMD_FLASH_RSP
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||||
st X+, r17 ; msg code
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||||
clr r17
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||||
st X+, r17 ; src address (not used)
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||||
st X, r16 ; payload byte
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||||
sbiw xh:xl, 4
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||||
rcall com2CalcAndAddChecksumByte ; (R16, R17, R18, R19, R20, X)
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||||
sbiw xh:xl, 5
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||||
ret
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||||
|
||||
|
||||
|
||||
; ---------------------------------------------------------------------------
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||||
; Write a FLASH_READY packet.
|
||||
;
|
||||
; IN:
|
||||
; - X : buffer to write to
|
||||
; OUT:
|
||||
; - nothing
|
||||
; MODIFIED REGS: R16, Z (R17, R18, R19, R20)
|
||||
|
||||
flashWriteFlashReady:
|
||||
ldi r16, 0xff
|
||||
st X+, r16 ; dest address (unused)
|
||||
ldi r16, 12 ; msg code+src address+ten payload bytes
|
||||
st X+, r16 ; msg len
|
||||
ldi r16, CPRO_CMD_FLASH_READY
|
||||
st X+, r16 ; msg code
|
||||
ldi r16, COM2_MAINTENANCE_ADDR
|
||||
st X+, r16 ; src address (not used)
|
||||
; payload
|
||||
lds r16, flashUid
|
||||
st X+, r16
|
||||
lds r16, flashUid+1
|
||||
st X+, r16
|
||||
lds r16, flashUid+2
|
||||
st X+, r16
|
||||
lds r16, flashUid+3
|
||||
st X+, r16
|
||||
ldi zl, low(firmwareType*2)
|
||||
ldi zh, HIGH(firmwareType*2)
|
||||
lpm r16, Z+
|
||||
st X+, r16 ; firmwareType (low)
|
||||
lpm r16, Z+
|
||||
st X+, r16 ; firmwareType (high)
|
||||
lpm r16, Z+
|
||||
st X+, r16 ; firmwareVersion (low)
|
||||
lpm r16, Z+
|
||||
st X+, r16 ; firmwareVersion (high)
|
||||
ldi r16, LOW(PAGESIZE*2)
|
||||
st X+, r16
|
||||
ldi r16, HIGH(PAGESIZE*2)
|
||||
st X, r16
|
||||
sbiw xh:xl, 13
|
||||
rcall com2CalcAndAddChecksumByte ; (R16, R17, R18, R19, R20, X)
|
||||
sbiw xh:xl, 14
|
||||
ret
|
||||
|
||||
|
||||
|
||||
; ---------------------------------------------------------------------------
|
||||
; Handle FLASH START packet.
|
||||
;
|
||||
; IN:
|
||||
; - X : buffer containing the message
|
||||
; OUT:
|
||||
; - CFLAG: set if message is for us, cleared otherwise
|
||||
; REGS: r16, r18. r19. r20, r21, X (R15, R17, R22)
|
||||
|
||||
flashHandleFlashStart:
|
||||
lds r18, flashUid
|
||||
lds r19, flashUid+1
|
||||
lds r20, flashUid+2
|
||||
lds r21, flashUid+3
|
||||
adiw xh:xl, FLASH_PACKET_START_OFFS_UID
|
||||
ld r16, X+
|
||||
cp r16, r18
|
||||
brne flashHandleFlashStart_notMe
|
||||
ld r16, X+
|
||||
cp r16, r19
|
||||
brne flashHandleFlashStart_notMe
|
||||
ld r16, X+
|
||||
cp r16, r20
|
||||
brne flashHandleFlashStart_notMe
|
||||
ld r16, X
|
||||
cp r16, r21
|
||||
brne flashHandleFlashStart_notMe
|
||||
; okay, flash start message is for us
|
||||
rcall flashWaitFor100ms
|
||||
rcall flashSendFlashResponse ; (R15, R16, R17, R18, R19, R20, R21, R22, X)
|
||||
sec
|
||||
ret
|
||||
flashHandleFlashStart_notMe:
|
||||
clc
|
||||
ret
|
||||
|
||||
|
||||
|
||||
; ---------------------------------------------------------------------------
|
||||
; Handle FLASH DATA packet.
|
||||
;
|
||||
; IN:
|
||||
; - X : buffer containing the message
|
||||
; OUT:
|
||||
; - CFLAG: set if message is for us, cleared otherwise
|
||||
; REGS: R0, R1, R15, R16, R17, R18, R19, R20, R21, R24, R25, X, Z
|
||||
|
||||
flashHandleFlashData:
|
||||
adiw xh:xl, FLASH_MSG_OFFS_MSGLEN
|
||||
ld r18, X ; length (subtract 6
|
||||
cpi r18, 6 ; cmd(1), src(1), addr(4)
|
||||
brcs flashHandleFlashData_badData
|
||||
subi r18, 6 ; remaining length
|
||||
adiw xh:xl, FLASH_PACKET_DATA_OFFS_ADDR-FLASH_MSG_OFFS_MSGLEN
|
||||
ld zl, X+ ; address (low)
|
||||
ld zh, X+ ; address (high)
|
||||
adiw xh:xl, 2 ; ignore high bytes, points to first data byte now
|
||||
|
||||
; rcall Flash_StartPage ; (R0, R1, R16, R20, R24, R25)
|
||||
push zl
|
||||
push zh
|
||||
flashHandleFlashData_loop:
|
||||
ld r0, X+
|
||||
ld r1, X+
|
||||
rcall Flash_WriteIntoPage ; (R15, R16, Z+)
|
||||
subi r18, 2
|
||||
brne flashHandleFlashData_loop
|
||||
pop zh
|
||||
pop zl
|
||||
rcall Flash_FinishPage ; (R15, R16, R20)
|
||||
clr r16
|
||||
rjmp flashHandleFlashData_sendResponse
|
||||
flashHandleFlashData_badData:
|
||||
ldi r16, FLASH_ERROR_MSGERROR
|
||||
flashHandleFlashData_sendResponse:
|
||||
rcall flashSendFlashResponse ; (R15, R16, R17, R18, R19, R20, R21, R22, X)
|
||||
sec
|
||||
ret
|
||||
|
||||
|
||||
|
||||
; ---------------------------------------------------------------------------
|
||||
; Create and send a FLASH RESPONSE packet
|
||||
;
|
||||
; IN:
|
||||
; - R16: response code to send
|
||||
; OUT:
|
||||
; - nothing
|
||||
; REGS: r16, X (R15, R17, R18, R19, R20, R21, R22)
|
||||
|
||||
flashSendFlashResponse:
|
||||
; send flash ready message
|
||||
ldi xl, LOW(flashSendBuffer)
|
||||
ldi xh, HIGH(flashSendBuffer)
|
||||
clr r16
|
||||
rcall flashWriteFlashRsp ; (R16, R17, R18, R19, R20)
|
||||
rjmp flashSendPacketUntilSuccess ; (R15, R16, R17, R21, R22, X)
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
FLASH_PROTO_END:
|
||||
.equ MODULE_SIZE_FLASH_PROTO = FLASH_PROTO_END-FLASH_PROTO_BEGIN
|
||||
|
||||
|
||||
Reference in New Issue
Block a user