Implement SAM3U Errata 46.2.1.4 about reading Unique Identifier

1 files changed, 8 insertions, 0 deletions

diff --git a/memories/flash/flashd_eefc.c b/memories/flash/flashd_eefc.c
index 45b9038..a367c8d 100644
--- a/memories/flash/flashd_eefc.c
+++ b/memories/flash/flashd_eefc.c
@@ -472,6 +472,7 @@ __attribute__ ((section (".ramfunc")))
 unsigned char FLASHD_ReadUniqueID (unsigned long * uniqueID)

 {

     unsigned char error;

+    AT91S_EFC *pEfc = AT91C_BASE_EFC0;

 

     SANITY_CHECK(uniqueID != NULL);

 

@@ -480,6 +481,9 @@ unsigned char FLASHD_ReadUniqueID (unsigned long * uniqueID)
     uniqueID[2] = 0;

     uniqueID[3] = 0;

 

+    /* SAM3U Errata 46.2.1.4 */

+    pEfc->EFC_FMR |= (1 << 16);

+

     EFC_StartCommand(AT91C_BASE_EFC, AT91C_EFC_FCMD_STUI, 0);

 

     uniqueID[0] = *(unsigned int *)AT91C_IFLASH;

@@ -488,6 +492,10 @@ unsigned char FLASHD_ReadUniqueID (unsigned long * uniqueID)
     uniqueID[3] = *(unsigned int *)(AT91C_IFLASH + 12);

 

     error = EFC_PerformCommand(AT91C_BASE_EFC, AT91C_EFC_FCMD_SPUI, 0);

+

+    /* SAM3U Errata 46.2.1.4 */

+    pEfc->EFC_FMR &= ~(1 << 16);

+

     if (error) return error;

 

     return 0;