martin/aqhomecontrol
Public Access
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

avr: more work on ardware uart code.

Browse Source
This commit is contained in:
Martin Preuss
2025-02-09 21:06:31 +01:00
parent 601559ca6e
commit 703f8042f9
8 changed files with 698 additions and 97 deletions
Download Patch File Download Diff File Expand all files Collapse all files

51
avr/modules/uart_hw/lowlevel.asm
View File

@@ -57,17 +57,27 @@ UART_HW_InterfaceInit:
ldi r17, UART_HW_IFACE_SIZE
clr r16
rcall Utils_FillSram ; (R17, X)
; reset ringbuffer for recvd chars
m_ringbuffer_y_reset UART_HW_IFACE_READBUF_SIZE, \
UART_HW_IFACE_OFFS_READBUF_USED, \
UART_HW_IFACE_OFFS_READBUF_RDPOS, \
UART_HW_IFACE_OFFS_READBUF_WRPOS, \
UART_HW_IFACE_OFFS_READBUF_DATA
; reset ringbuffer for chars to transmit
m_ringbuffer_y_reset UART_HW_IFACE_WRITEBUF_SIZE, \
UART_HW_IFACE_OFFS_WRITEBUF_USED, \
UART_HW_IFACE_OFFS_WRITEBUF_RDPOS, \
UART_HW_IFACE_OFFS_WRITEBUF_WRPOS, \
UART_HW_IFACE_OFFS_WRITEBUF_DATA
; reset ringbuffer for messages to be sent
m_ringbuffer_y_reset UART_HW_IFACE_OUTMSGBUF_SIZE, \
UART_HW_IFACE_OFFS_OUTMSGBUF_USED, \
UART_HW_IFACE_OFFS_OUTMSGBUF_RDPOS, \
UART_HW_IFACE_OFFS_OUTMSGBUF_WRPOS, \
UART_HW_IFACE_OFFS_OUTMSGBUF_DATA
ldi r16, 0xff
std Y+UART_HW_IFACE_OFFS_READMSG_BUFNUM, r16
std Y+UART_HW_IFACE_OFFS_WRITEMSG_BUFNUM, r16
@@ -156,7 +166,46 @@ UART_HW_InterfaceReadFromWriteBuffer:
UART_HW_Interface_Run:
; ---------------------------------------------------------------------------
; @routine UART_HW_InterfaceAddOutgoingMsgNum @global
;
; @return CFLAG on success, cleared on error
; @param r16 byte to write
; @param Y pointer to start of interface data
; @clobbers R17, R18, X
UART_HW_InterfaceAddOutgoingMsgNum:
push yl
push yh
adiw yh:yl, UART_HW_IFACE_OFFS_OUTMSGBUF
rcall uartHwRingBufferWriteGuarded ; R17, R18, X
pop yh
pop yl
ret
; @end
; ---------------------------------------------------------------------------
; @routine UART_HW_InterfaceGetNextOutgoingMsgNum @global
;
; @return CFLAG on success, cleared on error
; @return R16 byte read
; @param Y pointer to start of interface data
; @clobbers R17, R18, X
UART_HW_InterfaceGetNextOutgoingMsgNum:
push yl
push yh
adiw yh:yl, UART_HW_IFACE_OFFS_OUTMSGBUF
rcall uartHwRingBufferReadGuarded ; R17, R18, X
pop yh
pop yl
ret
; @end