47 lines
1.2 KiB
C
47 lines
1.2 KiB
C
/*
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* bcode.c - barcode scanner serial channel (see bcode.h).
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*/
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#include "bcode.h"
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GLDEF_C INT bcodeOpen(VOID **pChan)
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{
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/*
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* TTY:D = the top internal slot's serial port, where the barcode module
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* sits. mode -1 asks the driver for its default open mode.
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*
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* If the scanner needs specific line settings (baud rate, parity, stop
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* bits), configure the channel after opening with
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* p_iow(*pChan, P_FSET, &config);
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* where config is an E_CONFIG struct from p_config.h. See the RS232
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* section of the PLIB Reference. The module runs at up to 9600 baud.
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*/
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return p_open(pChan, "TTY:D", (UINT)-1);
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}
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GLDEF_C VOID bcodeClose(VOID *chan)
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{
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if (chan != NULL)
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p_close(chan);
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}
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GLDEF_C INT bcodeAssemble(UBYTE *raw, INT n, TEXT *line, INT *pLen, INT max)
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{
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INT i;
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for (i = 0; i < n; i++) {
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UBYTE c = raw[i];
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if (c == BCODE_TERM) {
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line[*pLen] = '\0';
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*pLen = 0;
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return 1;
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}
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if (c < ' ') /* skip LF, NULs and other control bytes */
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continue;
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if (*pLen < max - 1)
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line[(*pLen)++] = (TEXT)c;
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/* else: overflow - drop until the next terminator */
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}
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return 0;
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}
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