fix: Fix simulation model, update view

* Add SUMSAT saturation
* Add first iteration with 0 in registers

sim/generate_datasim.py

@@ -70,7 +70,8 @@ K_A = 218
 K_B = -186
 K_iC = 325
 K_D = -3225
-C_N_RND = 20
+C_N_RND = 26
+SUMSAT=36
 
 ## -----------------------
 # Model computation
@@ -88,9 +89,12 @@ for i in range(size):
 # Step 3: correction computation
 corr = np.zeros((N_PSC, size), dtype="int64")
 
+_corr = mm[:,0].astype('i8')*K_A*K_iC
+corr[:,0] = np.clip(np.round(_corr/2**C_N_RND), -2**15, 2**15-1).astype('i8')
 for i in range(1,size):
-    _corr = ((mm[:,i]*K_A + mm[:,i-1]*K_B + corr[:,i-1]*K_D)*K_iC)
-    corr[:,i] = np.clip(np.round(_corr/2**C_N_RND), -2**16, 2**16-1)
+    _sum = mm[:,i].astype('i8')*K_A + mm[:,i-1].astype('i8')*K_B + corr[:,i-1]*K_D
+    _corr = np.clip(_sum, -2**(SUMSAT-1), 2**(SUMSAT-1)-1)*K_iC
+    corr[:,i] = np.clip(np.round(_corr/2**C_N_RND), -2**15, 2**15-1)