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-rw-r--r--amforth-6.5/avr8/words/usart.asm41
1 files changed, 41 insertions, 0 deletions
diff --git a/amforth-6.5/avr8/words/usart.asm b/amforth-6.5/avr8/words/usart.asm
new file mode 100644
index 0000000..f14e62f
--- /dev/null
+++ b/amforth-6.5/avr8/words/usart.asm
@@ -0,0 +1,41 @@
+; ( -- )
+; MCU
+; initialize usart
+VE_USART:
+ .dw $ff06
+ .db "+usart"
+ .dw VE_HEAD
+ .set VE_HEAD = VE_USART
+XT_USART:
+ .dw DO_COLON
+PFA_USART: ; ( -- )
+
+ .dw XT_DOLITERAL
+ .dw USART_B_VALUE
+ .dw XT_DOLITERAL
+ .dw USART_B
+ .dw XT_CSTORE
+
+ .dw XT_DOLITERAL
+ .dw USART_C_VALUE
+ .dw XT_DOLITERAL
+ .dw USART_C | bm_USARTC_en
+ .dw XT_CSTORE
+
+ .dw XT_UBRR
+ .dw XT_DUP
+ .dw XT_BYTESWAP
+ .dw XT_DOLITERAL
+ .dw BAUDRATE_HIGH
+ .dw XT_CSTORE
+ .dw XT_DOLITERAL
+ .dw BAUDRATE_LOW
+ .dw XT_CSTORE
+.if XT_USART_INIT_RX!=0
+ .dw XT_USART_INIT_RX
+.endif
+.if XT_USART_INIT_TX!=0
+ .dw XT_USART_INIT_TX
+.endif
+
+ .dw XT_EXIT