From b71dd676b5ebe3feec1eb2194e20453a3d01705d Mon Sep 17 00:00:00 2001
From: Sam Anthony <sam@samanthony.xyz>
Date: Sat, 1 Nov 2025 20:32:55 -0400
Subject: lookup output value in table

---
 fw/table.c | 40 ++++++++++++++++++++++++++--------------
 1 file changed, 26 insertions(+), 14 deletions(-)

(limited to 'fw/table.c')

diff --git a/fw/table.c b/fw/table.c
index 41c1bc4..47a3ab9 100644
--- a/fw/table.c
+++ b/fw/table.c
@@ -8,22 +8,22 @@
 #include "table.h"
 
 Status
-tabWrite(const Table *tab, U8 k, U16 key, U16 val) {
+tabWrite(const Table *tab, U8 k, U32 key, U16 val) {
 	if (k >= TAB_ROWS) {
 		return FAIL;
 	}
 
 	U16 addr = tab->offset + k*TAB_ROW_SIZE;
-	U8 row[4u] = {
-		(key>>0u)&0xFF, (key>>8u)&0xFF,
-		(val>>0u)&0xFF, (val>>8u)&0xFF};
+	U8 row[sizeof(key) + sizeof(val)] = {
+		(key>>0u)&0xFF, (key>>8u)&0xFF, (key>>16u)&0xFF, (key>>24u)&0xFF, // LE
+		(val>>0u)&0xFF, (val>>8u)&0xFF}; // LE
 	return eepromWrite(addr, row, sizeof(row));
 }
 
 Status
-tabRead(const Table *tab, U8 k, U16 *key, U16 *val) {
+tabRead(const Table *tab, U8 k, U32 *key, U16 *val) {
 	U16 addr;
-	U8 row[4u];
+	U8 row[sizeof(*key) + sizeof(*val)];
 	Status status;
 
 	if (k >= TAB_ROWS) {
@@ -32,28 +32,40 @@ tabRead(const Table *tab, U8 k, U16 *key, U16 *val) {
 
 	addr = tab->offset + k*TAB_ROW_SIZE;
 	status = eepromRead(addr, row, sizeof(row));
-	*key = ((U16)row[0u]<<0u) | ((U16)row[1u]<<8u);
-	*val = ((U16)row[2u]<<0u) | ((U16)row[3u]<<8u);
+	*key = ((U32)row[0u]<<0u) | ((U32)row[1u]<<8u) | ((U32)row[2u]<<16u) | ((U32)row[3u]<<24u); // LE
+	*val = ((U16)row[4u]<<0u) | ((U16)row[5u]<<8u); // LE
 	return status;
 }
 
 Status
-tabLookup(const Table *tab, U16 key, U16 *val) {
+tabLookup(const Table *tab, Number key, U16 *val) {
 	U8 k;
-	U16 tkey, tval1, tval2;
+	Number tkey;
+	U16 tval1, tval2;
 	Status status;
+	int ord;
 
 	// Search for key
 	for (k = 0u; (k < TAB_ROWS-1u); k++) {
-		status = tabRead(tab, k, &tkey, &tval1);
+		status = tabRead(tab, k, &tkey.u32, &tval1);
 		if (status != OK) {
 			return FAIL;
 		}
-		if (key == tkey) { // found exact key
+
+		status = u32ToNum(tkey.u32, key.type, &tkey);
+		if (status != OK) {
+			return FAIL;
+		}
+
+		status = cmpNum(key, tkey, &ord);
+		if (status != OK) {
+			return FAIL;
+		}
+		if (ord == 0) { // found exact key
 			*val = tval1; 
 			return OK;
-		} else if (key > tkey) { // interpolate
-			status = tabRead(tab, k+1u, &tkey, &tval2);
+		} else if (ord > 0) { // interpolate
+			status = tabRead(tab, k+1u, &tkey.u32, &tval2);
 			if (status != OK) {
 				return FAIL;
 			}
-- 
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