EEPROM Library Not working, crashes. LM4C, Connected Launchpad — Replace ROM_ by RAM_ functions

[robertinant]

From @ekerin on March 22, 2015 17:33

Using the connected launchpad (TM4C1294XL) - and the EEPROM library, crashes the app (Same code works on Arduino)

I found this note in the Silicon Errata: Mem#11 on Page 51 (http://www.ti.com/lit/er/spmz850d/spmz850d.pdf)

The ROM_EEPROMInit API in TivaWare does not correctly initialize the EEPROM module as described in the data sheet. It should not be used to initialize the EEPROM. Workaround(s): Use the Flash version of the EEPROMInit API in TivaWare version 2.1 or later.

The following patch will reconfigure the map for the connected launchpad, and switch to using the MAP version of the EEPROM write code in EEPROM.cpp, instead of the hard coded ROM version. Only tested on Connected Launchpad (TM4C1294XL).

--- rom.h.orig  2014-07-19 19:11:54.428743038 -0400
+++ rom.h       2014-07-19 19:12:32.231312244 -0400
@@ -889,8 +889,7 @@
 //
 //*****************************************************************************
 #if defined(TARGET_IS_BLIZZARD_RA3) ||                                        \
-    defined(TARGET_IS_BLIZZARD_RB1) ||                                        \
-    defined(TARGET_IS_SNOWFLAKE_RA0)
+    defined(TARGET_IS_BLIZZARD_RB1) 
 #define ROM_EEPROMRead                                                        \
         ((void (*)(uint32_t *pui32Data,                                       \
                    uint32_t ui32Address,                                      \
@@ -973,8 +972,7 @@
         ((uint32_t (*)(void))ROM_EEPROMTABLE[12])
 #endif
 #if defined(TARGET_IS_BLIZZARD_RA3) ||                                        \
-    defined(TARGET_IS_BLIZZARD_RB1) ||                                        \
-    defined(TARGET_IS_SNOWFLAKE_RA0)
+    defined(TARGET_IS_BLIZZARD_RB1)
 #define ROM_EEPROMProgram                                                     \
         ((uint32_t (*)(uint32_t *pui32Data,                                   \
                        uint32_t ui32Address,                                  \
--- EEPROM.cpp.orig     2015-03-22 13:25:28.832987269 -0400
+++ EEPROM.cpp  2014-07-19 19:16:24.228934315 -0400
@@ -48,7 +48,7 @@
        //int word = (address / BYTES_PER_WORD) % WORDS_PER_BLOCK;
        unsigned long wordVal = 0;

-       ROM_EEPROMRead(&wordVal, byteAddr, 4);
+       MAP_EEPROMRead(&wordVal, byteAddr, 4);
        wordVal = wordVal >> (8*(address % BYTES_PER_WORD));

        return (uint8_t) wordVal;
@@ -59,11 +59,11 @@
        unsigned long byteAddr = address - (address % BYTES_PER_WORD);

        unsigned long wordVal = 0;
-       ROM_EEPROMRead(&wordVal, byteAddr, 4);
+       MAP_EEPROMRead(&wordVal, byteAddr, 4);
        wordVal &= ~(0xFF << (8*(address % BYTES_PER_WORD)));
        wordVal += value << (8*(address % BYTES_PER_WORD));

-       ROM_EEPROMProgram(&wordVal, byteAddr, 4);
+       MAP_EEPROMProgram(&wordVal, byteAddr, 4);
 }

 EEPROMClass EEPROM;

Copied from original issue: energia/Energia#576

[robertinant]

Which EEPROM library is this?

[robertinant]

From @ekerin on March 23, 2015 15:47

The one in Energia 14 (also happens in 11 and 12)

On Mon, Mar 23, 2015 at 11:03 AM, robertinant notifications@github.com wrote:

Which EEPROM library is this?

— Reply to this email directly or view it on GitHub https://github.com/energia/Energia/issues/576#issuecomment-85039373.