avr: added module uart_fd
This module uses hardware UART of MCUs in full duplex mode.
This commit is contained in:
Martin Preuss
687
avr/modules/uart_fd/uartfd0.asm
Normal file
687
avr/modules/uart_fd/uartfd0.asm
Normal file
@@ -0,0 +1,687 @@
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; ***************************************************************************
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; copyright : (C) 2025 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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#ifndef AVR_MODULES_UARTFD_UARTFD0_ASM
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#define AVR_MODULES_UARTFD_UARTFD0_ASM
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.dseg
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uartFd0_iface: .bytes UARTFD_IFACE_SIZE
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.cseg
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; ---------------------------------------------------------------------------
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; @routine UARTFD_Init @global
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;
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; @clobbers
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UARTFD0_Init:
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ldi yl, LOW(uartFd0_iface)
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ldi yh, HIGH(uartFd0_iface)
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rcall NET_Interface_Init ; (R16, R17, X)
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ldi r16, 0xff
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std Y+UARTFD_IFACE_OFFS_WBUFNUM, r16
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clr r16
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std Y+UARTFD_IFACE_OFFS_WBUFLEFT, r16
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std Y+UARTFD_IFACE_OFFS_RBUFUSED, r16
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std Y+UARTFD_IFACE_OFFS_RBUFLEFT, r16
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M_UARTFD_SET_BAUDRATE 0
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M_UARTFD_SET_CHARFORMAT 0
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; always receive!
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rcall uartFd0StartRx
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ret
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; @end
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; ---------------------------------------------------------------------------
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; @routine UARTFD0_Every100ms @global
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;
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; @clobbers
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UARTFD0_Every100ms:
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ldi yl, LOW(uartFd0_iface)
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ldi yh, HIGH(uartFd0_iface)
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rcall NET_Interface_Periodically
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ret
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; @end
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; ---------------------------------------------------------------------------
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; @routine UARTFD0_Run @global
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;
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; @return CFLAG set if something done
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; @clobbers r22, (r16, r17, r18, r19, r20, r24, r25, X, Y, Z)
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UARTFD0_Run:
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ldi yl, LOW(uartFd0_iface)
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ldi yh, HIGH(uartFd0_iface)
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clr r22
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rcall uartFd0RunRead ; (r16, r17, r18, r19, r20, r24, r25, X, Z)
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sbci r22, 0
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rcall uartFd0RunWrite ; (r16, r17, r18, r19, r24, r25, X)
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sbci r22, 0
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tst r22
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clc
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breq UARTFD0_Run_ret
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sec
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UARTFD0_Run_ret:
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ret
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; @end
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; ---------------------------------------------------------------------------
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; @routine uartFd0RunWrite
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;
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; @param Y pointer to interface data in SRAM
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; @return CFLAG set if something done
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; @clobbers r19 (r16, r18, r24, r25, X)
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uartFd0RunWrite:
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clr r19
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rcall uartFd0CheckWriting ; (r16, X)
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rcall uartFd0CheckMsgSent ; (r16, r24, r25)
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sbci r19, 0
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rcall uartFd0CheckSendMsg ; (r16, r17, r18, X)
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sbci r19, 0
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tst r19
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clc
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breq uartFd0RunWrite_ret
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sec
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uartFd0RunWrite_ret:
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ret
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; @end
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; ---------------------------------------------------------------------------
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; @routine uartFd0CheckWriting
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;
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; @param Y pointer to interface data in SRAM
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; @clobbers r16 (X)
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uartFd0CheckWriting:
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ldd r16, Y+UARTFD_IFACE_OFFS_WBUFNUM
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cpi r16, 0xff
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breq uartFd0CheckWriting_ret
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ldd r16, Y+UARTFD_IFACE_OFFS_WBUFLEFT
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tst r16
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breq uartFd0CheckWriting_ret
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ldd r16, Y+NET_IFACE_OFFS_WRITETIMER
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cpi r16, UARTFD_WRITE_TIMEOUT
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brcs uartFd0CheckWriting_ret
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rcall uartFd0RestartWriting ; (r16, X)
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uartFd0CheckWriting_ret:
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ret
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; @end
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; ---------------------------------------------------------------------------
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; @routine uartFd0CheckSendMsg
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;
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; @param Y pointer to interface data in SRAM
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; @return CFLAG set if something done
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; @clobbers r16 (r17, r18, X)
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uartFd0CheckSendMsg:
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ldd r16, Y+UARTFD_IFACE_OFFS_WBUFNUM
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cpi r16, 0xff
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brne uartFd0CheckSendMsg_clcRet
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rcall NET_Interface_GetNextOutgoingMsgNum ; (R17, R18, X)
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brcc uartFd0CheckSendMsg_ret
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rcall uartFd0StartWriting ; (R16, R17, X)
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sec
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rjmp uartFd0CheckSendMsg_ret
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uartFd0CheckSendMsg_clcRet:
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clc
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uartFd0CheckSendMsg_ret:
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ret
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; @end
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; ---------------------------------------------------------------------------
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; @routine uartFd0CheckMsgSent
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;
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; @param Y pointer to interface data in SRAM
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; @return CFLAG set if something done
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; @clobbers r16 (r24, r25)
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uartFd0CheckMsgSent:
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ldd r16, Y+UARTFD_IFACE_OFFS_WBUFNUM
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cpi r16, 0xff
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breq uartFd0CheckMsgSent_clcRet
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ldd r16, Y+UARTFD_IFACE_OFFS_WBUFLEFT
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tst r16
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brne uartFd0CheckMsgSent_clcRet
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rcall uartFd0FinishWriting ; (r16, r24, r25)
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sec
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rjmp uartFd0CheckMsgSent_ret
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uartFd0CheckMsgSent_clcRet:
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clc
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uartFd0CheckMsgSent_ret:
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ret
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; @end
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; ---------------------------------------------------------------------------
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; @routine uartFd0RunRead
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;
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; @param Y pointer to interface data in SRAM
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; @return CFLAG set if something done
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; @clobbers r16 (r17, r18, r19, r20, r24, r25, X, Z)
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uartFd0RunRead:
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; make sure received messages are stored ASAP
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rcall uartFd0CheckMsgReceived ; (r16, r17, r18, r19, r20, r24, r25, X, Z)
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push r15
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in r15, SREG ; save CFLAG
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; handle errors
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rcall uartFd0CheckOverrun ; (r16, r24, r25)
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rcall uartFd0CheckHwErr ; (r16, r24, r25)
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rcall uartFd0CheckBadMsgSize ; (r16, r24, r25)
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rcall uartFd0CheckSkipping ; (R16, X)
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; clear error flags
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ldd r16, Y+UARTFD_IFACE_OFFS_STATUS
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cbr r16, (1<<UARTFD_IFACE_STATUS_BIT_OVERRUN) | (1<<UARTFD_IFACE_STATUS_BIT_HWERR) | (1<<UARTFD_IFACE_STATUS_BIT_BADMSGSIZE)
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std Y+UARTFD_IFACE_OFFS_STATUS, r16
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; check timeout for reading
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rcall uartFd0CheckReading
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out SREG, r15 ; restore CFLAG from uartFd0CheckMsgReceived
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pop r15
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ret
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; @end
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; ---------------------------------------------------------------------------
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; @routine uartFd0CheckSkipping
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;
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; @param Y pointer to interface data in SRAM
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; @return CFLAG set if something done
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; @clobbers r16 (X)
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uartFd0CheckSkipping:
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ldd r16, Y+UARTFD_IFACE_OFFS_STATUS
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andi r16, (1<<UARTFD_IFACE_STATUS_BIT_SKIPPING)
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breq uartFd0CheckSkipping_ret
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ldd r16, Y+NET_IFACE_OFFS_READTIMER
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cpi r16, UARTFD_SKIPPING_TIME
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brcs uartFd0CheckSkipping_ret
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; leave skipping mode
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push r15
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in r15, SREG
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cli
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ldd r16, Y+UARTFD_IFACE_OFFS_STATUS
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cbr r16, (1<<UARTFD_IFACE_STATUS_BIT_SKIPPING)
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std Y+UARTFD_IFACE_OFFS_STATUS, r16
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rcall uartFd0RestartReading ; (R16, X)
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out SREG, r15
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pop r15
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uartFd0CheckSkipping_ret:
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ret
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; @end
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; ---------------------------------------------------------------------------
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; @routine uartFd0CheckReading
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;
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; @param Y pointer to interface data in SRAM
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; @clobbers r16 (X)
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uartFd0CheckReading:
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ldd r16, Y+UARTFD_IFACE_OFFS_RBUFLEFT
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tst r16
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breq uartFd0CheckReading_ret
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ldd r16, Y+UARTFD_IFACE_OFFS_RBUFUSED
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tst r16
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brne uartFd0CheckReading_ret
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ldd r16, Y+NET_IFACE_OFFS_READTIMER
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cpi r16, UARTFD_READ_TIMEOUT
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brcs uartFd0CheckReading_ret
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rcall uartFd0RestartReading ; (r16, X)
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uartFd0CheckReading_ret:
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ret
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; @end
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; ---------------------------------------------------------------------------
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; @routine uartFd0CheckMsgReceived
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;
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; @param Y pointer to interface data in SRAM
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; @return CFLAG set if something done
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; @clobbers r16 (r17, r18, r19, r20, r24, r25, X, Z)
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uartFd0CheckMsgReceived:
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ldd r16, Y+UARTFD_IFACE_OFFS_RBUFLEFT
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tst r16
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brne uartFd0CheckMsgReceived_clcRet
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ldd r16, Y+UARTFD_IFACE_OFFS_RBUFUSED
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tst r16
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breq uartFd0CheckMsgReceived_clcRet
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rcall uartFd0FinishReading ; (r16, r17, r18, r19, r20, r24, r25, X, Z)
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rcall uartFd0StartReading ; (R16, X)
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sec
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rjmp uartFd0CheckMsgReceived_ret
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uartFd0CheckMsgReceived_clcRet:
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clc
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uartFd0CheckMsgReceived_ret:
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ret
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; @end
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; ---------------------------------------------------------------------------
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; @routine uartFd0CheckOverrun
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;
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; @param Y pointer to interface data in SRAM
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; @clobbers r16, r24, r25
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uartFd0CheckOverrun:
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ldd r16, Y+UARTFD_IFACE_OFFS_STATUS
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andi r16, (1<<UARTFD_IFACE_STATUS_BIT_OVERRUN)
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breq uartFd0CheckOverrun_end
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ldi r16, NET_IFACE_OFFS_ERR_MISSED_LOW
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rcall NET_Interface_IncCounter16 ; (R24, R25)
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uartFd0CheckOverrun_end:
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ret
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; @end
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; ---------------------------------------------------------------------------
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; @routine uartFd0CheckHwErr
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;
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; @param Y pointer to interface data in SRAM
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; @clobbers r16, r24, r25
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uartFd0CheckHwErr:
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ldd r16, Y+UARTFD_IFACE_OFFS_STATUS
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andi r16, (1<<UARTFD_IFACE_STATUS_BIT_HWERR)
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breq uartFd0CheckHwErr_end
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ldi r16, NET_IFACE_OFFS_ERR_IO_LOW
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rcall NET_Interface_IncCounter16 ; (R24, R25)
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uartFd0CheckHwErr_end:
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ret
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; @end
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; ---------------------------------------------------------------------------
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; @routine uartFd0CheckBadMsgSize
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;
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; @param Y pointer to interface data in SRAM
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; @clobbers r16, r24, r25
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uartFd0CheckBadMsgSize:
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ldd r16, Y+UARTFD_IFACE_OFFS_STATUS
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andi r16, (1<<UARTFD_IFACE_STATUS_BIT_BADMSGSIZE)
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breq uartFd0CheckBadMsgSize_end
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ldi r16, NET_IFACE_OFFS_ERR_MSGSIZE_LOW
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rcall NET_Interface_IncCounter16 ; (R24, R25)
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uartFd0CheckBadMsgSize_end:
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ret
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; @end
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; ---------------------------------------------------------------------------
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; @routine uartFd0StartReading
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;
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; @param Y pointer to interface data in SRAM
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; @clobbers R16, X
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uartFd0StartReading:
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rjmp uartFd0RestartReading ; (R16, X)
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; @end
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; ---------------------------------------------------------------------------
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; @routine uartFd0RestartReading
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;
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; @param Y pointer to interface data in SRAM
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; @clobbers R16, X
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uartFd0RestartReading:
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mov xl, yl
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mov xh, yh
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adiw xh:xl, UARTFD_IFACE_OFFS_RBUFFER
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std Y+UARTFD_IFACE_OFFS_RPOS_LOW, xl
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std Y+UARTFD_IFACE_OFFS_RPOS_HIGH, xh
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clr r16
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std Y+UARTFD_IFACE_OFFS_RBUFUSED, r16
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std Y+NET_IFACE_OFFS_READTIMER, r16
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ldi r16, UARTFD_IFACE_SIZE_BUFFER
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std Y+UARTFD_IFACE_OFFS_RBUFLEFT, r16
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; clear error flags
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ldd r16, Y+UARTFD_IFACE_OFFS_STATUS
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cbr r16, (1<<UARTFD_IFACE_STATUS_BIT_OVERRUN) | (1<<UARTFD_IFACE_STATUS_BIT_HWERR) | (1<<UARTFD_IFACE_STATUS_BIT_BADMSGSIZE)
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std Y+UARTFD_IFACE_OFFS_STATUS, r16
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ret
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; @end
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; ---------------------------------------------------------------------------
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; @routine uartFd0FinishReading
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;
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; @param Y pointer to interface data in SRAM
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; @clobbers r16, r17, r18, X, Z (r19, r20, r24, r25)
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uartFd0FinishReading:
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mov xl, yl
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mov xh, yh
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adiw xh:xl, UARTFD_IFACE_OFFS_RBUFFER
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rcall NETMSG_CheckMessageInBuffer ; (R16, R17, R18, R19, R20, X)
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brcc uartFd0FinishReading_errorCrc
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rcall NET_Buffer_Alloc ; R16=number, X=ptr (R16, R17, X)
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brcc uartFd0FinishReading_errorMem
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ldd r18, Y+NET_IFACE_OFFS_IFACENUM
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ld r17, X
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andi r17, 0xf0
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or r17, r18
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st X+, r17 ; store interface number
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; copy to newly allocated buffer
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mov zl, yl
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mov zh, yh
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adiw zh:zl, UARTFD_IFACE_OFFS_RBUFFER
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ldd r17, Y+UARTFD_IFACE_OFFS_RBUFUSED
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uartFd0FinishReading_copyLoop:
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ld r18, Z+
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st X+, r18
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dec r17
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brne uartFd0FinishReading_copyLoop
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rcall NET_AddIncomingMsgNum
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brcs uartFd0FinishReading_msgSaved
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rcall NET_Buffer_ReleaseByNum ; (R16, X)
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rjmp uartFd0FinishReading_errorMem
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uartFd0FinishReading_msgSaved:
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ldi r16, NET_IFACE_OFFS_PACKETSIN_LOW
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rjmp uartFd0FinishReading_incCounter
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uartFd0FinishReading_errorCrc:
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ldi r16, NET_IFACE_OFFS_ERR_CONTENT_LOW
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rjmp uartFd0FinishReading_incCounter
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uartFd0FinishReading_errorMem:
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ldi r16, NET_IFACE_OFFS_ERR_NOBUF_LOW
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uartFd0FinishReading_incCounter:
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rjmp NET_Interface_IncCounter16 ; (R24, R25)
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; @end
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; ---------------------------------------------------------------------------
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; @routine uartFd0StartWriting
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;
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; @param R16 number of buffer to write
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; @param Y pointer to interface data in SRAM
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; @clobbers R16, X (R17)
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uartFd0StartWriting:
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std Y+UARTFD_IFACE_OFFS_WBUFNUM, r16
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rjmp uartFd0RestartWriting
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; @end
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; ---------------------------------------------------------------------------
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; @routine uartFd0RestartWriting
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;
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; @param Y pointer to interface data in SRAM
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; @clobbers R16, X (R17)
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uartFd0RestartWriting:
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ldd r16, Y+UARTFD_IFACE_OFFS_WBUFNUM
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cpi r16, 0xff
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breq uartFd0RestartWriting_ret
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rcall NET_Buffer_Locate ; (R17)
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brcc uartFd0RestartWriting_ret
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adiw xh:xl, 1
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adiw xh:xl, NETMSG_OFFS_MSGLEN
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ld r16, X
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sbiw xh:xl, NETMSG_OFFS_MSGLEN
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subi r16, -3 ; add destaddr, length, crc
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std Y+UARTFD_IFACE_OFFS_WBUFLEFT, r16
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std Y+UARTFD_IFACE_OFFS_WPOS_LOW, xl
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std Y+UARTFD_IFACE_OFFS_WPOS_HIGH, xh
|
||||
rcall uartFd0StartTx ; (r16)
|
||||
uartFd0RestartWriting_ret:
|
||||
ret
|
||||
; @end
|
||||
|
||||
|
||||
|
||||
; ---------------------------------------------------------------------------
|
||||
; @routine uartFd0FinishWriting
|
||||
;
|
||||
; @param R16 number of buffer to write
|
||||
; @param Y pointer to interface data in SRAM
|
||||
; @clobbers r16 (r24, r25)
|
||||
|
||||
uartFd0FinishWriting:
|
||||
rcall uartFd0StopTx ; (r16)
|
||||
ldd r16, Y+UARTFD_IFACE_OFFS_WBUFNUM
|
||||
cpi r16, 0xff
|
||||
breq uartFd0FinishWriting_ret
|
||||
rcall NET_Buffer_ReleaseByNum ; (r16, X)
|
||||
ldi r16, 0xff
|
||||
std Y+UARTFD_IFACE_OFFS_WBUFNUM, r16
|
||||
ldi r16, NET_IFACE_OFFS_PACKETSOUT_LOW
|
||||
rcall NET_Interface_IncCounter16 ; (R24, R25)
|
||||
uartFd0FinishWriting_ret:
|
||||
ret
|
||||
; @end
|
||||
|
||||
|
||||
|
||||
; ---------------------------------------------------------------------------
|
||||
; @routine uartFd0StartRx
|
||||
;
|
||||
; @clobbers R16
|
||||
|
||||
uartFd0StartRx:
|
||||
M_UARTFD_START_RX 0
|
||||
ret
|
||||
; @end
|
||||
|
||||
|
||||
|
||||
; ---------------------------------------------------------------------------
|
||||
; @routine uartFd0StopRx
|
||||
;
|
||||
; @clobbers R16
|
||||
|
||||
uartFd0StopRx:
|
||||
M_UARTFD_STOP_RX 0
|
||||
ret
|
||||
; @end
|
||||
|
||||
|
||||
|
||||
; ---------------------------------------------------------------------------
|
||||
; @routine uartFd0StartTx
|
||||
;
|
||||
; @clobbers R16
|
||||
|
||||
uartFd0StartTx:
|
||||
M_UARTFD_START_TX 0
|
||||
ret
|
||||
; @end
|
||||
|
||||
|
||||
|
||||
; ---------------------------------------------------------------------------
|
||||
; @routine uartFd0StopTx
|
||||
;
|
||||
; @clobbers R16
|
||||
|
||||
uartFd0StopTx:
|
||||
M_UARTFD_STOP_TX 0
|
||||
ret
|
||||
; @end
|
||||
|
||||
|
||||
|
||||
; ---------------------------------------------------------------------------
|
||||
; @routine uartFd0RxChar
|
||||
;
|
||||
; @clobbers r16, r17, X
|
||||
|
||||
uartFd0RxChar:
|
||||
M_UARTFD_RXCHAR_ISR 0
|
||||
ret
|
||||
; @end
|
||||
|
||||
|
||||
|
||||
; ---------------------------------------------------------------------------
|
||||
; @routine uartFd0TxUdre
|
||||
;
|
||||
; @clobbers r16, r17, X
|
||||
|
||||
uartFd0TxUdre:
|
||||
M_UARTFD_TXUDRE_ISR 0
|
||||
ret
|
||||
; @end
|
||||
|
||||
|
||||
|
||||
; ---------------------------------------------------------------------------
|
||||
; @routine uartFd0TxChar
|
||||
;
|
||||
; @clobbers
|
||||
|
||||
uartFd0TxChar:
|
||||
M_UARTFD_TXCHAR_ISR 0
|
||||
ret
|
||||
; @end
|
||||
|
||||
|
||||
|
||||
; ---------------------------------------------------------------------------
|
||||
; @routine UARTFD0_RxCharIsr @global @isr
|
||||
;
|
||||
; @clobbers none
|
||||
|
||||
UARTFD0_RxCharIsr:
|
||||
push r15
|
||||
in r15, SREG
|
||||
push yl
|
||||
push yh
|
||||
ldi yl, LOW(uartFd0_iface)
|
||||
ldi yh, HIGH(uartFd0_iface)
|
||||
push r16
|
||||
push r17
|
||||
push xl
|
||||
push xh
|
||||
rcall uartFd0RxChar
|
||||
pop xh
|
||||
pop xl
|
||||
pop r17
|
||||
pop r16
|
||||
pop yh
|
||||
pop yl
|
||||
out SREG, r15
|
||||
pop r15
|
||||
reti
|
||||
; @end
|
||||
|
||||
|
||||
|
||||
; ---------------------------------------------------------------------------
|
||||
; @routine UARTFD0_TxUdreIsr @global @isr
|
||||
;
|
||||
; @clobbers none
|
||||
|
||||
UARTFD0_TxUdreIsr:
|
||||
push r15
|
||||
in r15, SREG
|
||||
push yl
|
||||
push yh
|
||||
ldi yl, LOW(uartFd0_iface)
|
||||
ldi yh, HIGH(uartFd0_iface)
|
||||
push r16
|
||||
push r17
|
||||
push xl
|
||||
push xh
|
||||
rcall uartFd0TxUdre
|
||||
pop xh
|
||||
pop xl
|
||||
pop r17
|
||||
pop r16
|
||||
pop yh
|
||||
pop yl
|
||||
out SREG, r15
|
||||
pop r15
|
||||
reti
|
||||
; @end
|
||||
|
||||
|
||||
|
||||
; ---------------------------------------------------------------------------
|
||||
; @routine UARTFD0_TxCharIsr @global @isr
|
||||
;
|
||||
; @clobbers none
|
||||
|
||||
UARTFD0_TxCharIsr:
|
||||
push r15
|
||||
in r15, SREG
|
||||
push yl
|
||||
push yh
|
||||
ldi yl, LOW(uartFd0_iface)
|
||||
ldi yh, HIGH(uartFd0_iface)
|
||||
push r16
|
||||
push r17
|
||||
push xl
|
||||
push xh
|
||||
rcall uartFd0TxChar
|
||||
pop xh
|
||||
pop xl
|
||||
pop r17
|
||||
pop r16
|
||||
pop yh
|
||||
pop yl
|
||||
out SREG, r15
|
||||
pop r15
|
||||
reti
|
||||
; @end
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
#endif
|
||||
|
||||
|
||||
|
||||
Reference in New Issue
Block a user