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. 2021 Dec 10;21(24):8271. doi: 10.3390/s21248271

Algorithm 3 Data/parity error correction

1:
procedure $D a t a_E r r_C o r r e c t i o n (a d d r, d a t a)$
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$e n a b l e_e r r o r_f l a g ()$ ▹ Prevent Parity update
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$W R I T E (a d d r, d a t a)$ ▹ Corrected data from first READ
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$d i s a b l e_e r r o r_f l a g ()$ ▹ Allow Parity update
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$d i a g_d a t a \leftarrow R E A D (a d d r)$
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$t y p e_f l a g \leftarrow r e a d_e r r o r_f l a g ()$
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if $d i a g_d a t a \neq d a t a$ then
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$A l e r t_m u l t i p l e_e r r o r s (a d d r)$
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else
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switch $t y p e_f l a g$ do
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case $0 \times F F F F ‖ 0 \times 00 F F$ ▹ DUE ≥ 2 bit errors
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$A l e r t_2_e r r o r s (a d d r)$
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case $0 \times 0000$
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$S e n d_f a u l t y_p o s (T R A N S I E N T, a d d r)$
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case $d e f a u l t$
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$S e n d_f a u l t y_p o s (P E R M A N E N T, a d d r)$
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procedure $P a r i t y_E r r_C o r r e c t i o n (a d d r, d a t a)$
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$d i s a b l e_e r r o r_f l a g ()$ ▹ Allow Parity update
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$W R I T E (a d d r, d a t a)$
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$d a t a \leftarrow R E A D (a d d r)$
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$t y p e_f l a g \leftarrow r e a d_e r r o r_f l a g ()$
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if $t y p e_f l a g = 0 \times F F F F$ then ▹ Permanent error
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$S e n d_f a u l t y_p o s (P E R M A N E N T, a d d r)$
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else
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$S e n d_f a u l t y_p o s (T R A N S I E N T, a d d r)$