X-Git-Url: http://cloudbase.mooo.com/gitweb/avrcpm.git/blobdiff_plain/a7b795ca288038b9b99c6afe5d15cf2ddd4dac3f..12a27f27734b18ba4dea8d411095cf53c3870ef2:/avr/hw-uart.asm

diff --git a/avr/hw-uart.asm b/avr/hw-uart.asm
index 6fdb6db..81552b9 100644
--- a/avr/hw-uart.asm
+++ b/avr/hw-uart.asm
@@ -1,4 +1,4 @@
-; Serial interface using the ATmega8/88 USART. 
+; Serial interface using the ATmega8/88 USART.
 ; This is part of the Z80-CP/M emulator written by Sprite_tm.
 ;
 ;    Copyright (C) 2010 Leo C.
@@ -27,7 +27,7 @@
 #define TXBUFMASK  TXBUFSIZE-1
 
 	.dseg
-	
+
 rxcount:
 	.byte	1
 rxidx_w:
@@ -45,9 +45,9 @@ rxfifo:
 txfifo:
 	.byte	TXBUFSIZE
 
-	
+
 	.cseg
-; Init 
+; Init
 uart_init:
 
 	ldi temp, (1<<TXEN0) | (1<<RXEN0) | (1<<RXCIE0)
@@ -68,7 +68,7 @@ uart_init:
 
 ; USART receive interrupt
 
-	INTERRUPT URXCaddr   
+	INTERRUPT URXCaddr
 
 	push	temp
 	in	temp,sreg
@@ -78,11 +78,11 @@ uart_init:
 	inm8	temp,RXTXDR0
 	lds	zh,rxcount		;if rxcount < RXBUFSIZE
 	cpi	zh,RXBUFSIZE		;   (room for at least 1 char?)
-	brsh	rxi_ov			; 
+	brsh	rxi_ov			;
 	inc	zh			;
 	sts	rxcount,zh		;   rxcount++
 
-	ldi	zl,low(rxfifo)		;  
+	ldi	zl,low(rxfifo)		;
 	lds	zh,rxidx_w		;
 	add	zl,zh			;
 	inc	zh			;
@@ -107,7 +107,7 @@ uartgetc:
 	lds	temp,rxcount		; Number of characters in buffer
 	tst	temp
 	breq	uartgetc		;Wait for char
-	
+
 	push	zh
 	push	zl
 	ldi	zl,low(rxfifo)
@@ -138,13 +138,13 @@ uartgetc:
 	push	temp
 	lds	temp,txcount		;if txcount != 0
 	tst	temp			;
-	breq	txi_e			; 
+	breq	txi_e			;
 
 	dec	temp			;
 	sts	txcount,temp		;   --txcount
 	push	zh			;
 	push	zl			;
-	ldi	zl,low(txfifo)		;  
+	ldi	zl,low(txfifo)		;
 	ldi	zh,high(txfifo)		;
 	lds	temp,txidx_r		;
 	add	zl,temp			;
@@ -170,7 +170,7 @@ txi_x:
 	reti
 
 
-;Sends a char from temp to the uart. 
+;Sends a char from temp to the uart.
 uartputc:
 	push	zh
 	push	zl
@@ -180,7 +180,7 @@ putc_l:
 	cpi	temp,TXBUFSIZE		;
 	brsh	putc_l			;} while (txcount >= TXBUFSIZE)
 
-	ldi	zl,low(txfifo)		;  
+	ldi	zl,low(txfifo)		;
 	ldi	zh,high(txfifo)		;
 	lds	temp,txidx_w		;
 	add	zl,temp			;
@@ -203,4 +203,3 @@ putc_l:
 	ret
 
 ; vim:set ts=8 noet nowrap
-