Steve Karg
770be70688
* Added required linux Ethernet library for ethernet build * Added .obj to gitignore * Fixed BACnet port for APPLE to use BSD in CMake * Changed format in CMake to enable cleaner SC merge * Added create-object and delete-object recipes in GCC Makefile * Added datalink timer to all example OS apps * Changed most microcontroller ports to use BACAPP_MINIMAL to specify which datatypes can be written. * Fixed zephyr OS for BACnet/IP warning * Fixed zephyr OS log to not require log_strdup * Added writefile API to file object example * Added API to device-client to make it more robust. * Added API in network-port object for getting the ASCII object-name * Added debug print with a timestamp option * Added debug print with hex dump print * Added API to network port object for activate and discard * Added default define for debug with timestamp * Added prototype in header for disabled debug printf. * Added fifo peek ahead function to peek at more than one byte. * Added get-mac value for network port that uses buffer rather than octetstring
122 lines
2.3 KiB
C
122 lines
2.3 KiB
C
/**
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* @file
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* @author Steve Karg
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* @date 2004
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*/
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#ifndef FIFO_H
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#define FIFO_H
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#include <stdint.h>
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#include <stdbool.h>
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/* BACnet Stack defines - first */
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#include "bacnet/bacdef.h"
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/**
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* FIFO buffer power of two alignment macro
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*
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* @{
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*/
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#ifndef NEXT_POWER_OF_2
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#define B2(x) ( (x) | ( (x) >> 1) )
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#define B4(x) ( B2(x) | ( B2(x) >> 2) )
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#define B8(x) ( B4(x) | ( B4(x) >> 4) )
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#define B16(x) ( B8(x) | ( B8(x) >> 8) )
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#define B32(x) (B16(x) | (B16(x) >>16) )
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#define NEXT_POWER_OF_2(x) (B32((x)-1) + 1)
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#endif
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/** @} */
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/**
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* FIFO data store structure
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*
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* @{
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*/
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#define FIFO_DATA_STORE(b,c) uint8_t b[NEXT_POWER_OF_2(c)]
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/** @} */
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/**
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* FIFO data structure
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*
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* @{
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*/
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struct fifo_buffer_t {
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/** first byte of data */
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volatile unsigned head;
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/** last byte of data */
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volatile unsigned tail;
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/** block of memory or array of data */
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volatile uint8_t *buffer;
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/** length of the data */
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unsigned buffer_len;
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};
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typedef struct fifo_buffer_t FIFO_BUFFER;
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/** @} */
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#ifdef __cplusplus
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extern "C" {
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#endif /* __cplusplus */
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BACNET_STACK_EXPORT
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unsigned FIFO_Count(
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FIFO_BUFFER const *b);
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BACNET_STACK_EXPORT
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bool FIFO_Full(
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FIFO_BUFFER const *b);
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BACNET_STACK_EXPORT
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bool FIFO_Available(
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FIFO_BUFFER const *b,
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unsigned count);
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BACNET_STACK_EXPORT
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bool FIFO_Empty(
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FIFO_BUFFER const *b);
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BACNET_STACK_EXPORT
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uint8_t FIFO_Peek(
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FIFO_BUFFER const *b);
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BACNET_STACK_EXPORT
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unsigned FIFO_Peek_Ahead(
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FIFO_BUFFER const *b,
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uint8_t* data_bytes,
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unsigned length);
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BACNET_STACK_EXPORT
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uint8_t FIFO_Get(
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FIFO_BUFFER * b);
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BACNET_STACK_EXPORT
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unsigned FIFO_Pull(
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FIFO_BUFFER * b,
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uint8_t * data_bytes,
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unsigned length);
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BACNET_STACK_EXPORT
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bool FIFO_Put(
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FIFO_BUFFER * b,
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uint8_t data_byte);
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BACNET_STACK_EXPORT
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bool FIFO_Add(
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FIFO_BUFFER * b,
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uint8_t * data_bytes,
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unsigned count);
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BACNET_STACK_EXPORT
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void FIFO_Flush(
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FIFO_BUFFER * b);
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/* note: buffer_len must be a power of two */
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BACNET_STACK_EXPORT
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void FIFO_Init(
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FIFO_BUFFER * b,
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volatile uint8_t * buffer,
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unsigned buffer_len);
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#ifdef __cplusplus
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}
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#endif /* __cplusplus */
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#endif
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