en:readbyte
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en:readbyte [2016/08/12 21:28] admin |
en:readbyte [2020/02/28 10:46] |
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| - | ===== ReadByte (Function) ===== | ||
| - | ==== Format ==== | ||
| - | **readbyte**\\ | ||
| - | **readbyte** ( )\\ | ||
| - | **readbyte** ( [[integerexpressions|open_file_number]] ) | ||
| - | |||
| - | returns [[integerexpressions|integer_expression]] | ||
| - | |||
| - | ==== Description ==== | ||
| - | Reads and returns the next byte (8 bits) as a number 0-255 from an open file. If the file number is not specified file number zero (0) will be used. | ||
| - | \\ | ||
| - | File should be opened with the [[open|Openb]] statement so that ASCII CR/LF translation does not happen. | ||
| - | \\ | ||
| - | In you are reading a serial port opened with [[OpenSerial|OpenSerial]] no translation will happen. | ||
| - | |||
| - | ==== Example ==== | ||
| - | |||
| - | < | ||
| - | cls | ||
| - | f$ = " | ||
| - | |||
| - | print "new file" | ||
| - | openb f$ | ||
| - | reset | ||
| - | for t = 1 to 20 | ||
| - | n = r() | ||
| - | print n+" "; | ||
| - | | ||
| - | next t | ||
| - | |||
| - | close | ||
| - | |||
| - | print "open and read" | ||
| - | openb f$ | ||
| - | while not eof | ||
| - | print readbyte()+" | ||
| - | end while | ||
| - | |||
| - | |||
| - | print " | ||
| - | seek 10 | ||
| - | while not eof | ||
| - | print readbyte()+" | ||
| - | end while | ||
| - | |||
| - | |||
| - | close | ||
| - | |||
| - | end | ||
| - | |||
| - | function r() | ||
| - | r = int(rand*256) | ||
| - | end function | ||
| - | </ | ||
| - | will display something like | ||
| - | < | ||
| - | new file | ||
| - | 181 163 155 23 46 93 122 212 178 225 1 62 113 130 202 52 185 51 37 165 | ||
| - | open and read | ||
| - | 181 163 155 23 46 93 122 212 178 225 1 62 113 130 202 52 185 51 37 165 | ||
| - | position to 10 and read | ||
| - | 1 62 113 130 202 52 185 51 37 165 | ||
| - | </ | ||
| - | |||
| - | |||
| - | ==== See Also ==== | ||
| - | {{page> | ||
| - | |||
| - | ==== History ==== | ||
| - | |1.1.4.0|Added Serial Port| | ||
en/readbyte.txt ยท Last modified: 2020/02/28 10:46 (external edit)
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