ZBasic Language Reference
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ZBasic Microcontrollers
Appendix C - Pre-Defined Structures
The following pre-defined structures are available for most ZBasic devices based on Atmel ATmega
CPUs. However, due to irregularities in the arrangement of registers on some mega CPUs they are not
available. In particular, the predefined structures are not available for ZBasic devices based on the
mega32 or the mega128.
One or more of the pre-defined structures may be added to your application with the Option Include
directive using the structure names below.
ATTiny- and ATmega-based ZBasic Devices
' For accessing I/O ports:
Structure Port_t
Public Volatile Pin as Byte
Public Volatile DDR as Byte
Public Volatile Port as Byte
End Structure
' For accessing 8-bit timers (if present in standard form):
Structure Timer8_t
Public Volatile TCCRA as Byte
Public Volatile TCCRB as Byte
Public Volatile CNT as Byte
Public Volatile ICR as Byte
Public Volatile OCRA as Byte
Public Volatile OCRB as Byte
End Structure
' For accessing 16-bit timers (if present in standard form):
Structure Timer16_t
Public Volatile TCCRA as Byte
Public Volatile TCCRB as Byte
Public Volatile TCCRC as Byte
Public Volatile unused_1 as Byte
Public Volatile CNT as UnsignedInteger
Public Volatile ICR as UnsignedInteger
Public Volatile OCRA as UnsignedInteger
Public Volatile OCRB as UnsignedInteger
Public Volatile OCRC as UnsignedInteger (if applicable)
End Structure
' For accessing USARTs (if present in standard form):
Structure USART_t
Public Volatile UCSRA as Byte
Public Volatile UCSRB as Byte
Public Volatile UCSRC as Byte
Public Volatile unused_1 as Byte
Public Volatile UBRR as UnsignedInteger
Public Volatile UDR as Byte
End Structure
' For representing Microtime:
Structure Microtime_t
Public Volatile timerTicks as Byte
Public Volatile fastTicks UnsignedLong
End Structure
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