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avr: more work on hardware-based UART module.

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This commit is contained in:
Martin Preuss
2025-01-19 15:46:21 +01:00
parent c390b1059c
commit ecb2d85ea2
5 changed files with 534 additions and 121 deletions
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72
avr/modules/uart_hw/buffers.asm
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@@ -13,13 +13,6 @@
uartHwDataBegin:
; fixed buffers for incoming and outgoing messages
uartHw_buffers: .byte UART_HW_FIXEDBUFFERS_NUM*UART_HW_FIXEDBUFFERS_SIZE
; ringbuffer for buffer numbers of incoming msgs
uartHw_ringBufferMsgNumIn: .byte RINGBUFFERY_OFFS_DATA+UART_HW_MSGNUMINBUF_SIZE
; ringbuffer for buffer numbers of outgoing msgs
uartHw_ringBufferMsgNumOut: .byte RINGBUFFERY_OFFS_DATA+UART_HW_MSGNUMOUTBUF_SIZE
uartHwDataEnd:
@@ -106,68 +99,3 @@ UART_HW_FixedBuffers_Locate_end:
; ---------------------------------------------------------------------------
; @routine UART_HW_AddIncomingMsg @global
;
; @return CFLAG set if buffer available, cleared otherwise
; @return r16 buffer num
; @return X pointer to start of buffer
; @clobbers R17, R18, X, Y
UART_HW_AddIncomingMsg:
ldi yl, LOW(uartHw_ringBufferMsgNumIn)
ldi yh, HIGH(uartHw_ringBufferMsgNumIn)
rjmp RingBufferY_WriteByte ; (R17, R18, X)
; @end
; ---------------------------------------------------------------------------
; @routine UART_HW_GetNextIncomingMsg @global
;
; @return CFLAG set if buffer available, cleared otherwise
; @return r16 buffer num
; @return X pointer to start of buffer
; @clobbers R17, R18, X, Y
UART_HW_GetNextIncomingMsg:
ldi yl, LOW(uartHw_ringBufferMsgNumIn)
ldi yh, HIGH(uartHw_ringBufferMsgNumIn)
rjmp RingBufferY_ReadByte ; (R17, R18, X)
; @end
; ---------------------------------------------------------------------------
; @routine UART_HW_AddOutgoingMsg @global
;
; @return CFLAG set if buffer available, cleared otherwise
; @return r16 buffer num
; @return X pointer to start of buffer
; @clobbers R17, R18, X, Y
UART_HW_AddOutgoingMsg:
ldi yl, LOW(uartHw_ringBufferMsgNumOut)
ldi yh, HIGH(uartHw_ringBufferMsgNumOut)
rjmp RingBufferY_WriteByte ; (R17, R18, X)
; @end
; ---------------------------------------------------------------------------
; @routine UART_HW_GetNextOutgoingMsg @global
;
; @return CFLAG set if buffer available, cleared otherwise
; @return r16 buffer num
; @return X pointer to start of buffer
; @clobbers R17, R18, X, Y
UART_HW_GetNextOutgoingMsg:
ldi yl, LOW(uartHw_ringBufferMsgNumOut)
ldi yh, HIGH(uartHw_ringBufferMsgNumOut)
rjmp RingBufferY_ReadByte ; (R17, R18, X)
; @end