from math import log


Rr = 10000.0
A = -6.01188
B = 4622.53337
C = -86421.72414

R=13226

t= 2*C/((B**2-4*C*(A-log(R)))**0.5-B)-273.15
print(R,t)

x=9.0878
y= -0.112*x**3+4.8477*x**2-85.572*x+489.01
print(y)


A=0.4116
B=0.931
C=-9
y= (-B+ (B**2-4*A*C)**0.5)/2/A
print(y)

y=359 #180
combined = round(y / 0.00205479)
low16 = combined & 0xFFFF
high4 = (combined >> 16) & 0xF
#d = (high4 << 16) | low16
d = (low16 << 16) | (high4 << 0)
print(f"特殊公式8反推：y={y} low16={hex(low16)}，high4 = {hex(high4)}, d={hex(d)}")

# y = 30
# if y < (0.0973 * 1840 + 180):  # 区间1：y < 359.032
#     m = (y - 180) / 0.0973
# elif y > (0.0974 * 1840 - 179.46):  # 区间2：y > -0.444
#     m = (y + 179.46) / 0.0974
# else:  # m=1840
#     m = 1840.0

y = 150 #30，240
if y < (180):  # 区间1：
    m = (y + 179.46) / 0.0974
elif y > (180):  # 区间2：
    m = (y - 180) / 0.0973 
else:  # m=1840
    m = 0.0
print(f"特殊公式11-1反推：y={y} d={ float(round(m))}")
# 组帧需要整数，返回四舍五入
#return float(round(m))