Ring buffer for data loggers.
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#include <RingBuf.h>
template<class
F, size_t Size>
class RingBuf< F, Size >
Ring buffer for data loggers.
This ring buffer may be used in ISRs. bytesFreeIsr(), bytesUsedIsr(), memcopyIn(), and memcopyOut() are ISR callable. For ISR use call memcopyIn() in the ISR and use writeOut() in non-interrupt code to write data to a file. readIn() and memcopyOut can be use in a similar way to provide file data to an ISR.
Print into a RingBuf in an ISR should also work but has not been verified.
◆ RingBuf()
template<class
F , size_t Size>
◆ begin()
template<class
F , size_t Size>
◆ bytesFree()
template<class
F , size_t Size>
size_t RingBuf< F, Size >::bytesFree |
( |
| ) |
const |
|
inline |
- Returns
- the RingBuf free space in bytes. Not ISR callable.
◆ bytesFreeIsr()
template<class
F , size_t Size>
size_t RingBuf< F, Size >::bytesFreeIsr |
( |
| ) |
const |
|
inline |
- Returns
- the RingBuf free space in bytes. ISR callable.
◆ bytesUsed()
template<class
F , size_t Size>
size_t RingBuf< F, Size >::bytesUsed |
( |
| ) |
const |
|
inline |
- Returns
- the RingBuf used space in bytes. Not ISR callable.
◆ bytesUsedIsr()
template<class
F , size_t Size>
size_t RingBuf< F, Size >::bytesUsedIsr |
( |
| ) |
const |
|
inline |
- Returns
- the RingBuf used space in bytes. ISR callable.
◆ memcpyIn()
template<class
F , size_t Size>
size_t RingBuf< F, Size >::memcpyIn |
( |
const void * |
buf, |
|
|
size_t |
count |
|
) |
| |
|
inline |
Copy data to the RingBuf from buf. The number of bytes copied may be less than count if count is greater than bytesFree.
This function may be used in an ISR with writeOut() in non-interrupt code.
- Parameters
-
[in] | buf | Location of data to be copied. |
[in] | count | number of bytes to be copied. |
- Returns
- Number of bytes actually copied.
◆ memcpyOut()
template<class
F , size_t Size>
size_t RingBuf< F, Size >::memcpyOut |
( |
void * |
buf, |
|
|
size_t |
count |
|
) |
| |
|
inline |
Copy date from the RingBuf to buf. The number of bytes copied may be less than count if bytesUsed is less than count.
This function may be used in an ISR with readIn() in non-interrupt code.
- Parameters
-
[out] | buf | Location to receive the data. |
[in] | count | number of bytes to be copied. |
- Returns
- Number of bytes actually copied.
◆ printField() [1/3]
template<class
F , size_t Size>
size_t RingBuf< F, Size >::printField |
( |
double |
value, |
|
|
char |
term, |
|
|
uint8_t |
prec = 2 |
|
) |
| |
|
inline |
Print a number followed by a field terminator.
- Parameters
-
[in] | value | The number to be printed. |
[in] | term | The field terminator. Use '\n' for CR LF. |
[in] | prec | Number of digits after decimal point. |
- Returns
- The number of bytes written.
◆ printField() [2/3]
template<class
F , size_t Size>
size_t RingBuf< F, Size >::printField |
( |
float |
value, |
|
|
char |
term, |
|
|
uint8_t |
prec = 2 |
|
) |
| |
|
inline |
Print a number followed by a field terminator.
- Parameters
-
[in] | value | The number to be printed. |
[in] | term | The field terminator. Use '\n' for CR LF. |
[in] | prec | Number of digits after decimal point. |
- Returns
- The number of bytes written or -1 if an error occurs.
◆ printField() [3/3]
template<class
F , size_t Size>
template<typename Type >
size_t RingBuf< F, Size >::printField |
( |
Type |
value, |
|
|
char |
term |
|
) |
| |
|
inline |
Print a number followed by a field terminator.
- Parameters
-
[in] | value | The number to be printed. |
[in] | term | The field terminator. Use '\n' for CR LF. |
- Returns
- The number of bytes written or -1 if an error occurs.
◆ readIn()
template<class
F , size_t Size>
size_t RingBuf< F, Size >::readIn |
( |
size_t |
count | ) |
|
|
inline |
Read data into the RingBuf from the underlying file. the number of bytes read may be less than count if bytesFree is less than count.
This function may be used in non-interrupt code with memcopyOut() in an ISR.
- Parameters
-
[in] | count | number of bytes to be read. |
- Returns
- Number of bytes actually read.
◆ sync()
template<class
F , size_t Size>
Write all data in the RingBuf to the underlying file.
- Returns
- true for success.
◆ write() [1/4]
template<class
F , size_t Size>
size_t RingBuf< F, Size >::write |
( |
const char * |
str | ) |
|
|
inline |
Copy str to RingBuf.
- Parameters
-
[in] | str | Location of data to be written. |
- Returns
- Number of bytes actually written.
◆ write() [2/4]
template<class
F , size_t Size>
size_t RingBuf< F, Size >::write |
( |
const uint8_t * |
buf, |
|
|
size_t |
count |
|
) |
| |
|
inlineoverride |
Override virtual function in Print for efficiency.
- Parameters
-
[in] | buf | Location of data to be written. |
[in] | count | number of bytes to be written. |
- Returns
- Number of bytes actually written.
◆ write() [3/4]
template<class
F , size_t Size>
size_t RingBuf< F, Size >::write |
( |
const void * |
buf, |
|
|
size_t |
count |
|
) |
| |
|
inline |
Copy data to the RingBuf from buf.
The number of bytes copied may be less than count if count is greater than bytesFree. Use getWriteError() to check for print errors and clearWriteError() to clear error.
- Parameters
-
[in] | buf | Location of data to be written. |
[in] | count | number of bytes to be written. |
- Returns
- Number of bytes actually written.
◆ write() [4/4]
template<class
F , size_t Size>
size_t RingBuf< F, Size >::write |
( |
uint8_t |
data | ) |
|
|
inlineoverride |
Required function for Print.
- Parameters
-
[in] | data | Byte to be written. |
- Returns
- Number of bytes actually written.
◆ writeOut()
template<class
F , size_t Size>
size_t RingBuf< F, Size >::writeOut |
( |
size_t |
count | ) |
|
|
inline |
Write data to file from RingBuf buffer.
- Parameters
-
[in] | count | number of bytes to be written. |
The number of bytes written may be less than count if bytesUsed is less than count or if an error occurs.
This function may be used in non-interrupt code with memcopyIn() in an ISR.
- Returns
- Number of bytes actually written.
The documentation for this class was generated from the following file: