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Reduce EEPROM wear, don't check if changed before write.

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This commit is contained in:
Krzysiek Egzmont
2023-10-20 12:01:06 +02:00
parent 87fd5c19d0
commit f7c0d4149b
1 changed files with 18 additions and 9 deletions
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27
driver/eeprom.c
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@@ -14,6 +14,9 @@
* limitations under the License. * limitations under the License.
*/ */
#include <stddef.h>
#include <string.h>
#include "driver/eeprom.h" #include "driver/eeprom.h"
#include "driver/i2c.h" #include "driver/i2c.h"
#include "driver/system.h" #include "driver/system.h"
@@ -38,16 +41,22 @@ void EEPROM_ReadBuffer(uint16_t Address, void *pBuffer, uint8_t Size)
void EEPROM_WriteBuffer(uint16_t Address, const void *pBuffer) void EEPROM_WriteBuffer(uint16_t Address, const void *pBuffer)
{ {
I2C_Start(); if (pBuffer == NULL || Address >= 0x2000)
return;
I2C_Write(0xA0);
I2C_Write((Address >> 8) & 0xFF); uint8_t buffer[8];
I2C_Write((Address >> 0) & 0xFF); EEPROM_ReadBuffer(Address, buffer, 8);
if (memcmp(pBuffer, buffer, 8) != 0)
{
I2C_Start();
I2C_Write(0xA0);
I2C_Write((Address >> 8) & 0xFF);
I2C_Write((Address >> 0) & 0xFF);
I2C_WriteBuffer(pBuffer, 8);
I2C_Stop();
}
I2C_WriteBuffer(pBuffer, 8); // give the EEPROM time to burn the data in (apparently takes 5ms)
SYSTEM_DelayMs(8);
I2C_Stop();
SYSTEM_DelayMs(10);
} }