diff options
Diffstat (limited to 'tmk_core/common/chibios/eeprom_teensy.c')
| -rw-r--r-- | tmk_core/common/chibios/eeprom_teensy.c | 18 |
1 files changed, 15 insertions, 3 deletions
diff --git a/tmk_core/common/chibios/eeprom_teensy.c b/tmk_core/common/chibios/eeprom_teensy.c index 45f9a530da..d436d0cb95 100644 --- a/tmk_core/common/chibios/eeprom_teensy.c +++ b/tmk_core/common/chibios/eeprom_teensy.c @@ -50,7 +50,16 @@ // (aligned to 2 or 4 byte boundaries) has twice the endurance // compared to writing 8 bit bytes. // -# define EEPROM_SIZE 32 +# ifndef EEPROM_SIZE +# define EEPROM_SIZE 32 +# endif + +/* + ^^^ Here be dragons: + NXP AppNote AN4282 section 3.1 states that partitioning must only be done once. + Once EEPROM partitioning is done, the size is locked to this initial configuration. + Attempts to modify the EEPROM_SIZE setting may brick your board. +*/ // Writing unaligned 16 or 32 bit data is handled automatically when // this is defined, but at a cost of extra code size. Without this, @@ -517,8 +526,11 @@ void eeprom_write_block(const void *buf, void *addr, uint32_t len) { #else // No EEPROM supported, so emulate it -# define EEPROM_SIZE 64 -static uint8_t buffer[EEPROM_SIZE]; +# ifndef EEPROM_SIZE +# include "eeconfig.h" +# define EEPROM_SIZE (((EECONFIG_SIZE + 3) / 4) * 4) // based off eeconfig's current usage, aligned to 4-byte sizes, to deal with LTO +# endif +__attribute__((aligned(4))) static uint8_t buffer[EEPROM_SIZE]; uint8_t eeprom_read_byte(const uint8_t *addr) { uint32_t offset = (uint32_t)addr; |