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##

# 1.1.9.4.18 DRV_USART_BUFFER_HANDLE_INVALID Macro

## C

    #define DRV_USART_BUFFER_HANDLE_INVALID  ((DRV_USART_BUFFER_HANDLE)(-1))

## Summary

Definition of an invalid buffer handle.

## Description

This is the definition of an invalid buffer handle. An invalid buffer handle is returned by DRV_USART_ReadBufferAdd and DRV_USART_WriteBufferAdd functions if the buffer add request was not successful.

## Remarks

None