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#!/usr/bin/env python3
#
# Copyright 2020 Birte Kristina Friesel
#
# SPDX-License-Identifier: BSD-2-Clause
import numpy as np
import sys
# include/arch/msp430fr5969lp/driver/timer.h
def get_timer_frequency(f_cpu, f_timer):
if f_cpu == 16000000:
ta0_main_div = 8
elif f_cpu == 8000000:
ta0_main_div = 4
elif f_cpu == 4000000:
ta0_main_div = 2
elif f_cpu == 1000000:
ta0_main_div = 1
else:
raise ValueError("Invalid f_cpu")
if f_cpu == 1000000:
if f_timer >= 1000:
divisor = 1
counter = 1000 / (f_timer / 1000)
elif f_timer >= 20:
divisor = 1
counter = 1000000 / f_timer
else:
divisor = 8 * 2
counter = 62500 / f_timer
else:
if f_timer >= 1000:
divisor = ta0_main_div * 1
counter = 2000 / (f_timer / 1000)
else:
divisor = ta0_main_div * 1
counter = 2000000 / f_timer
return f_cpu / divisor / int(counter)
module = sys.argv[1]
if module == 'f_timer' and len(sys.argv) == 4:
try:
f_cpu = int(sys.argv[2])
f_timer = int(sys.argv[3])
except:
sys.exit(0)
if f_cpu != 0 and f_timer != 0:
print('{:.2f}'.format(get_timer_frequency(f_cpu, f_timer)))
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