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fixed a problem with m8515 UART.

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UBRRH and UCSRC share the same io register location, bit URSEL needs to
be set in order to access UCSRC!!
This commit is contained in:
Martin Preuss
2025-05-17 13:18:50 +02:00
parent ea0d426430
commit 10e4aa8f85
1 changed files with 7 additions and 2 deletions
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9
avr/modules/flash/io_uart_all_attn.asm
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@@ -37,8 +37,13 @@ ioRawInit:
M_IO_WRITE UART_REG_UBRRL, r16
; set character format (asynchronous USART, 8-bit, one stop bit, no parity)
ldi r16, (1<<UART_BIT_UCSZ0) | (1<<UART_BIT_UCSZ1)
sts UART_REG_UCSRC, r16
.ifdef URSEL
ldi r16, (1<<URSEL) | (1<<UART_BIT_USBS) | (3<<UART_BIT_UCSZ0)
.else
ldi r16, (1<<UART_BIT_USBS)|(3<<UART_BIT_UCSZ0)
.endif
; ldi r16, (1<<UART_BIT_UCSZ0) | (1<<UART_BIT_UCSZ1)
M_IO_WRITE UART_REG_UCSRC, r16
cbi COM_ATTN_DDR, COM_ATTN_PIN ; set ATTN port as input