mirror of
https://github.com/kamilsss655/uv-k5-firmware-custom
synced 2024-11-22 10:18:15 +00:00
74 lines
1.8 KiB
C
74 lines
1.8 KiB
C
/* Original work Copyright 2023 Dual Tachyon
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* https://github.com/DualTachyon
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*
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* Modified work Copyright 2024 kamilsss655
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* https://github.com/kamilsss655
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <stddef.h>
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#include <string.h>
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#include "driver/eeprom.h"
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#include "driver/i2c.h"
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#include "driver/system.h"
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// EEPROM calibration tables start here
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#define EEPROM_WRITE_MAX_ADDR 0x1E00
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void EEPROM_ReadBuffer(uint16_t Address, void *pBuffer, uint8_t Size)
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{
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I2C_Start();
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I2C_Write(0xA0);
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I2C_Write((Address >> 8) & 0xFF);
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I2C_Write((Address >> 0) & 0xFF);
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I2C_Start();
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I2C_Write(0xA1);
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I2C_ReadBuffer(pBuffer, Size);
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I2C_Stop();
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}
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/*
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Writes to EEPROM
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Address: EEPROM address
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pBuffer: value
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safe: if set to false will allow overwriting calibration data
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*/
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void EEPROM_WriteBuffer(uint16_t Address, const void *pBuffer, const bool safe)
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{
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if (pBuffer == NULL || (safe && Address >= EEPROM_WRITE_MAX_ADDR))
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return;
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uint8_t buffer[8];
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EEPROM_ReadBuffer(Address, buffer, 8);
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if (memcmp(pBuffer, buffer, 8) != 0)
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{
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I2C_Start();
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I2C_Write(0xA0);
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I2C_Write((Address >> 8) & 0xFF);
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I2C_Write((Address >> 0) & 0xFF);
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I2C_WriteBuffer(pBuffer, 8);
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I2C_Stop();
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}
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// give the EEPROM time to burn the data in (apparently takes 5ms)
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SYSTEM_DelayMs(8);
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}
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