; ***************************************************************************
; 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_IFACE_READBUF_SIZE        = 8
.equ UART_HW_IFACE_WRITEBUF_SIZE       = 8
.equ UART_HW_IFACE_OUTMSGBUF_SIZE      = 4

.equ UART_HW_BUFFER_INUSE_BIT          = 7
.equ UART_HW_BUFFER_IFACENUM1_BIT      = 1
.equ UART_HW_BUFFER_IFACENUM0_BIT      = 0


.equ UART_HW_READMODE_OFF               = 0
.equ UART_HW_READMODE_IDLE              = 1
.equ UART_HW_READMODE_READING           = 2
.equ UART_HW_READMODE_SKIPPING          = 3

.equ UART_HW_WRITEMODE_OFF              = 0
.equ UART_HW_WRITEMODE_IDLE             = 1
.equ UART_HW_WRITEMODE_WRITING          = 2
.equ UART_HW_WRITEMODE_WAITBUFFEREMPTY  = 3
.equ UART_HW_WRITEMODE_WRITEBUFFEREMPTY = 4


.equ UART_HW_STATUS_UNDERRUN_BIT       = 0
.equ UART_HW_STATUS_OVERRUN_BIT        = 1
.equ UART_HW_STATUS_HWERR_BIT          = 2
.equ UART_HW_STATUS_SOFTERR_BIT        = 3
.equ UART_HW_STATUS_ATTN_BIT           = 7


.equ UART_HW_IFACE_OFFS_IFACENUM        = 0 ; interface number (put into received messages)
.equ UART_HW_IFACE_OFFS_STATUS          = 1
.equ UART_HW_IFACE_OFFS_READTIMER       = 2
.equ UART_HW_IFACE_OFFS_WRITETIMER      = 3
.equ UART_HW_IFACE_OFFS_ERR_OVRLOW      = 4
.equ UART_HW_IFACE_OFFS_ERR_OVRHIGH     = 5
.equ UART_HW_IFACE_OFFS_ERR_CONTENTLOW  = 6
.equ UART_HW_IFACE_OFFS_ERR_CONTENTHIGH = 7

.equ UART_HW_IFACE_OFFS_READMODE        = 8
.equ UART_HW_IFACE_OFFS_READBUFNUM      = 9
.equ UART_HW_IFACE_OFFS_READBUFPOSLOW   = 10
.equ UART_HW_IFACE_OFFS_READBUFPOSHIGH  = 11
.equ UART_HW_IFACE_OFFS_READBUFUSED     = 12
.equ UART_HW_IFACE_OFFS_READBUFLEFT     = 13

.equ UART_HW_IFACE_OFFS_WRITEMODE       = 14
.equ UART_HW_IFACE_OFFS_WRITEBUFNUM     = 15
.equ UART_HW_IFACE_OFFS_WRITEBUFPOSLOW  = 16
.equ UART_HW_IFACE_OFFS_WRITEBUFPOSHIGH = 17
.equ UART_HW_IFACE_OFFS_WRITEBUFUSED    = 18
.equ UART_HW_IFACE_OFFS_WRITEBUFLEFT    = 19
.equ UART_HW_IFACE_OFFS_WRITEMSGRINGBUF = 20

.equ UART_HW_IFACE_SIZE                 = UART_HW_IFACE_OFFS_WRITEMSGRINGBUF+RINGBUFFERY_SIZE+UART_HW_IFACE_OUTMSGBUF_SIZE