75 lines
2.2 KiB
Python
Executable File
75 lines
2.2 KiB
Python
Executable File
#!/usr/bin/env python3
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import os
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import sys
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import numpy as np
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license_header = """/* Reflow Oven Controller
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*
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* Copyright (C) 2020 Mario Hüttel <mario.huettel@gmx.net>
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*
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* This file is part of the Reflow Oven Controller Project.
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*
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* The reflow oven controller is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* The Reflow Oven Control Firmware is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with the reflow oven controller project.
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* If not, see <http://www.gnu.org/licenses/>.
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*/
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"""
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hfile="temp-converter-data.h"
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project_dir = os.path.dirname(os.path.realpath(__file__))
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include_prefix = 'reflow-controller'
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module_include_dir = os.path.join(project_dir, os.path.join('include', include_prefix))
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include_file = os.path.join(module_include_dir, hfile)
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h_define = '__'+hfile.replace('.', '_').replace('-', '_').upper()+'__'
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min_res = 1000
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max_res = 2200
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res_step = 20
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R_zero = 1000.0
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A = 3.9083E-3
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B = -5.7750E-7
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def calc_temp(resistance):
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temp = (-R_zero * A + np.sqrt(R_zero*R_zero * A * A - 4* R_zero * B * (R_zero - resistance)))/(2*R_zero*B)
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return temp
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if ((max_res-min_res) % res_step) != 0:
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print('Resistance range must be a multiple of res_step!')
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sys.exit(-1)
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print('Calculating temperature table for %f Ohm to %f Ohm in %f Ohm steps' % (min_res, max_res, res_step))
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temp_array = ''
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for res in range(min_res, max_res+res_step, res_step):
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temp = calc_temp(res)
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temp_array = temp_array+ ',%.2ff' % temp
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temp_array = temp_array[1:]
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with open(include_file, 'x') as f:
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f.write(license_header)
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f.write('\n')
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f.write('#ifndef %s\n' % h_define)
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f.write('#define %s\n\n' % h_define)
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f.write('#define TEMP_CONVERSION_ARRAY_DATA %s\n' % temp_array)
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f.write('#define TEMP_CONVERSION_MIN_RES %d\n' % min_res)
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f.write('#define TEMP_CONVERSION_MAX_RES %d\n' % max_res)
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f.write('#define TEMP_CONVERSION_RES_STEP %d\n' % res_step)
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f.write('\n')
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f.write('#endif /* %s */\n' % h_define)
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