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https://github.com/slsdetectorgroup/slsDetectorPackage.git
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102 lines
3.2 KiB
C
102 lines
3.2 KiB
C
// SPDX-License-Identifier: LGPL-3.0-or-other
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// Copyright (C) 2021 Contributors to the SLS Detector Package
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#include "LTC2620_Driver.h"
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#include "clogger.h"
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#include "common.h"
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#include "sls/sls_detector_defs.h"
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#include <string.h>
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/* LTC2620 DAC DEFINES */
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#define LTC2620_D_PWR_DOWN_VAL (-100)
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#define LTC2620_D_MAX_DAC_VAL (4095) // 12 bits
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#define LTC2620_D_MAX_STEPS (LTC2620_D_MAX_DAC_VAL + 1)
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// defines from the fpga
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int LTC2620_D_HardMaxVoltage = 0;
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char LTC2620_D_DriverFileName[MAX_STR_LENGTH];
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int LTC2620_D_NumDacs = 0;
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void LTC2620_D_SetDefines(int hardMaxV, char *driverfname, int numdacs) {
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LOG(logINFOBLUE,
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("Configuring DACs (LTC2620) to %s (numdacs:%d, hard max: %dmV)\n",
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driverfname, numdacs, hardMaxV));
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LTC2620_D_HardMaxVoltage = hardMaxV;
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memset(LTC2620_D_DriverFileName, 0, MAX_STR_LENGTH);
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strcpy(LTC2620_D_DriverFileName, driverfname);
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LTC2620_D_NumDacs = numdacs;
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}
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int LTC2620_D_GetMaxNumSteps() { return LTC2620_D_MAX_STEPS; }
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int LTC2620_D_VoltageToDac(int voltage, int *dacval) {
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return ConvertToDifferentRange(0, LTC2620_D_HardMaxVoltage, 0,
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LTC2620_D_MAX_DAC_VAL, voltage, dacval);
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}
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int LTC2620_D_DacToVoltage(int dacval, int *voltage) {
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return ConvertToDifferentRange(0, LTC2620_D_MAX_DAC_VAL, 0,
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LTC2620_D_HardMaxVoltage, dacval, voltage);
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}
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int LTC2620_D_SetDACValue(int dacnum, int val, int mV, char *dacname,
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int *dacval) {
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LOG(logDEBUG1, ("dacnum:%d, val:%d, ismV:%d\n", dacnum, val, mV));
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// validate index
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if (dacnum < 0 || dacnum >= LTC2620_D_NumDacs) {
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LOG(logERROR, ("Dac index %d is out of bounds (0 to %d)\n", dacnum,
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LTC2620_D_NumDacs - 1));
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return FAIL;
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}
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// get
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if (val < 0 && val != LTC2620_D_PWR_DOWN_VAL)
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return FAIL;
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// convert to dac or get mV value
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*dacval = val;
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int dacmV = val;
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int ret = OK;
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if (mV) {
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ret = LTC2620_D_VoltageToDac(val, dacval);
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} else if (val >= 0) {
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// do not convert power down dac val
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ret = LTC2620_D_DacToVoltage(val, &dacmV);
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}
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// conversion out of bounds
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if (ret == FAIL) {
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LOG(logERROR, ("Setting Dac %d %s is out of bounds\n", dacnum,
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(mV ? "mV" : "dac units")));
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return FAIL;
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}
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// set
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if ((*dacval >= 0) || (*dacval == LTC2620_D_PWR_DOWN_VAL)) {
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LOG(logINFO, ("Setting DAC %2d [%-12s] : %d dac (%d mV)\n", dacnum,
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dacname, *dacval, dacmV));
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#ifndef VIRTUAL
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char fname[MAX_STR_LENGTH];
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strcpy(fname, LTC2620_D_DriverFileName);
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char temp[20];
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memset(temp, 0, sizeof(temp));
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sprintf(temp, "%d", dacnum);
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strcat(fname, temp);
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LOG(logDEBUG1, ("fname %s\n", fname));
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// open file
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FILE *fd = fopen(fname, "w");
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if (fd == NULL) {
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LOG(logERROR, ("Could not open file %s for writing to set dac %d\n",
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fname, dacnum));
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return FAIL;
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}
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// convert to string, add 0 and write to file
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fprintf(fd, "%d\n", *dacval);
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fclose(fd);
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#endif
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}
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return OK;
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}
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