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In this example, we have two ‘files’ that we implemented as an array of 16-bit integers.
| Code Block | ||
|---|---|---|
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#define APP_MAX_FILES 2
#define APP_FILE_MAX_RECORDS 10
#define APP_FILE_MAX_VALUES 100
CPU_INT16U AppFile[APP_MAX_FILES][APP_FILE_MAX_RECORDS][APP_FILE_MAX_VALUES];
CPU_INT16U MB_FileRd (CPU_INT16U file_nbr,
CPU_INT16U record_nbr,
CPU_INT16U ix,
CPU_INT08U record_len,
CPU_INT16U *perr)
{
CPU_INT16U val;
*perr = MODBUS_ERR_NONE;
if (file_nbr >= APP_MAX_FILES) {
*perr = MODBUS_ERR_FILE;
return (0);
}
if (record_nbr >= APP_FILE_MAX_RECORDS) {
*perr = MODBUS_ERR_RECORD;
return (0);
}
if (ix >= APP_FILE_MAX_VALUES) {
*perr = MODBUS_ERR_IX;
return (0);
}
CPU_CRITICAL_ENTER();
val = AppFile[file_nbr][record_nbr][ix];
CPU_CRITICAL_EXIT();
return (val);
} |
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