release: update machine docs to 0.12.0

Signed-off-by: Ron Evans <[email protected]>

Author: deadprogram

content/microcontrollers/machine/arduino-nano.md

@@ -292,8 +292,8 @@ const (
 var (
 	UART1 = UART{
 		Buffer:	NewRingBuffer(),
-		Bus:	sam.SERCOM5_USART,
-		SERCOM:	5,
+		Bus:	sam.SERCOM3_USART,
+		SERCOM:	3,
 	}
 )
 ```
@@ -305,8 +305,8 @@ UART1 on the Arduino Nano 33 connects to the onboard NINA-W102 WiFi chip.
 var (
 	UART2 = UART{
 		Buffer:	NewRingBuffer(),
-		Bus:	sam.SERCOM3_USART,
-		SERCOM:	3,
+		Bus:	sam.SERCOM5_USART,
+		SERCOM:	5,
 	}
 )
 ```
@@ -1355,9 +1355,10 @@ SPIConfig is used to store config info for SPI.
 
 ```go
 type UART struct {
-	Buffer	*RingBuffer
-	Bus	*sam.SERCOM_USART_Type
-	SERCOM	uint8
+	Buffer		*RingBuffer
+	Bus		*sam.SERCOM_USART_Type
+	SERCOM		uint8
+	Interrupt	interrupt.Interrupt
 }
 ```
 

content/microcontrollers/machine/arduino-nano33.md

@@ -142,7 +142,6 @@ var (
 	UART0	= UART{
 		Buffer:	NewRingBuffer(),
 		Bus:	stm32.USART1,
-		IRQVal:	stm32.IRQ_USART1,
 	}
 	UART1	= &UART0
 )
@@ -551,9 +550,9 @@ SPIConfig is used to store config info for SPI.
 
 ```go
 type UART struct {
-	Buffer	*RingBuffer
-	Bus	*stm32.USART_Type
-	IRQVal	uint32
+	Buffer		*RingBuffer
+	Bus		*stm32.USART_Type
+	Interrupt	interrupt.Interrupt
 }
 ```