0
mirror of https://github.com/OneOfEleven/uv-k5-firmware-custom.git synced 2025-04-28 22:31:25 +03:00

78 lines
1.9 KiB
C
Raw Normal View History

2023-09-09 08:03:56 +01:00
/* Copyright 2023 Dual Tachyon
* https://github.com/DualTachyon
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
2023-10-19 14:21:37 +01:00
#include <string.h> // NULL and memcmp
2023-09-09 08:03:56 +01:00
#include "driver/eeprom.h"
#include "driver/i2c.h"
#include "driver/system.h"
2023-10-19 14:21:37 +01:00
void EEPROM_ReadBuffer(const uint16_t address, void *p_buffer, const unsigned int size)
2023-09-09 08:03:56 +01:00
{
if (p_buffer == NULL || (address + size) > 0x2000 || size == 0)
2023-10-19 14:21:37 +01:00
return;
2023-09-09 08:03:56 +01:00
2023-10-19 14:21:37 +01:00
I2C_Start();
2023-09-09 08:03:56 +01:00
I2C_Write(0xA0);
2023-10-19 14:21:37 +01:00
I2C_Write((address >> 8) & 0xFF);
I2C_Write((address >> 0) & 0xFF);
2023-09-09 08:03:56 +01:00
I2C_Start();
I2C_Write(0xA1);
2023-10-19 14:21:37 +01:00
I2C_ReadBuffer(p_buffer, size);
2023-09-09 08:03:56 +01:00
I2C_Stop();
}
void EEPROM_WriteBuffer8(const uint16_t address, const void *p_buffer)
2023-09-09 08:03:56 +01:00
{
if (p_buffer == NULL || (address + 8) > 0x2000)
2023-10-19 14:21:37 +01:00
return;
#if 0
// normal way
2023-09-09 08:03:56 +01:00
2023-10-19 14:21:37 +01:00
I2C_Start();
2023-09-09 08:03:56 +01:00
I2C_Write(0xA0);
2023-10-19 14:21:37 +01:00
I2C_Write((address >> 8) & 0xFF);
I2C_Write((address >> 0) & 0xFF);
I2C_WriteBuffer(p_buffer, 8);
I2C_Stop();
2023-09-09 08:03:56 +01:00
// give the EEPROM time to burn the data in (apparently takes 1.5ms ~ 5ms)
SYSTEM_DelayMs(6);
2023-10-19 14:21:37 +01:00
#else
// eeprom wear reduction
// only write the data if it's different to what's already there
2023-09-09 08:03:56 +01:00
2023-10-19 14:21:37 +01:00
uint8_t buffer[8];
EEPROM_ReadBuffer(address, buffer, 8);
if (memcmp(p_buffer, buffer, 8) != 0)
{
I2C_Start();
I2C_Write(0xA0);
I2C_Write((address >> 8) & 0xFF);
I2C_Write((address >> 0) & 0xFF);
I2C_WriteBuffer(p_buffer, 8);
I2C_Stop();
// give the EEPROM time to burn the data in (apparently takes 1.5ms ~ 5ms)
SYSTEM_DelayMs(6);
2023-10-19 14:21:37 +01:00
}
2023-09-09 08:03:56 +01:00
2023-10-19 14:21:37 +01:00
#endif
2023-09-09 08:03:56 +01:00
}