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avr: started working on hardware-based UART module.

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Martin Preuss
2025-01-15 00:12:06 +01:00
parent 172998a5c4
commit 3633bb03fc
3 changed files with 132 additions and 0 deletions
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49
avr/modules/uart_hw/defs.asm Normal file
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; ***************************************************************************
; copyright : (C) 2025 by Martin Preuss
; email : martin@libchipcard.de
;
; ***************************************************************************
; * This file is part of the project "AqHome". *
; * Please see toplevel file COPYING of that project for license details. *
; ***************************************************************************
.equ UART_HW_STATE_OFF = 0
.equ UART_HW_STATE_IDLE = 1
.equ UART_HW_STATE_READING = 2
.equ UART_HW_STATE_WRITING = 3
.equ UART_HW_STATE_SKIPPING = 4
.equ UART_HW_IFACE_MSGIDBUF_SIZE = 8
.equ UART_HW_IFACE_READBUF_SIZE = 24
.equ UART_HW_IFACE_OFFS_STATE = 0
.equ UART_HW_IFACE_OFFS_READBUFFERNUM = 1 ; num of buffer currently read
.equ UART_HW_IFACE_OFFS_READBUFFERPOS = 2 ; current pos in readbuffer
.equ UART_HW_IFACE_OFFS_READBUFFERLEFT = 3 ; bytes left to read for current message
.equ UART_HW_IFACE_OFFS_WRITEBUFFERID = 4 ; num of buffer currently written from to network
.equ UART_HW_IFACE_OFFS_WRITEBUFFERPOS = 5 ; current pos in writebuffer
.equ UART_HW_IFACE_OFFS_WRITEBUFFERLEFT= 6 ; bytes left to write for current message
.equ UART_HW_IFACE_OFFS_RINGBUF_USED = 7 ; ringbuffer for incoming chars
.equ UART_HW_IFACE_OFFS_RINGBUF_RDPOS = 8
.equ UART_HW_IFACE_OFFS_RINGBUF_WRPOS = 9
.equ UART_HW_IFACE_OFFS_MSGIDBUF_USED = 10 ; ringbuffer for ids of outbound messages
.equ UART_HW_IFACE_OFFS_MSGIDBUF_RDPOS = 11
.equ UART_HW_IFACE_OFFS_MSGIDBUF_WRPOS = 12
.equ UART_HW_IFACE_OFFS_RINGBUF_DATA = 13
.equ UART_HW_IFACE_OFFS_MSGIDBUF_DATA = UART_HW_IFACE_OFFS_RINGBUF_DATA+UART_HW_IFACE_READBUF_SIZE
.equ UART_HW_IFACE_SIZE = UART_HW_IFACE_OFFS_MSGIDBUF_DATA+UART_HW_IFACE_MSGIDBUF_SIZE
.equ UART_HW_IFACE_FN_ISR_CHECKATTN = 0
.equ UART_HW_IFACE_FN_ISR_READCHAR = 1
.equ UART_HW_IFACE_FN_ISR_WRITECHAR = 2
.equ UART_HW_IFACE_FN_COUNT = 3