mirror of
https://github.com/OneOfEleven/uv-k5-firmware-custom.git
synced 2025-04-27 22:01:26 +03:00
64 lines
1.7 KiB
C
64 lines
1.7 KiB
C
/* Copyright 2023 Dual Tachyon
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* https://github.com/DualTachyon
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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 <string.h> // NULL and memcmp
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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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void EEPROM_ReadBuffer(const uint16_t address, void *p_buffer, const unsigned int size)
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{
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if ((address + size) > 0x2000 || size == 0)
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return;
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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(p_buffer, size, false);
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I2C_ReadBuffer(p_buffer, size, true); // faster read
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I2C_Stop();
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}
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void EEPROM_WriteBuffer8(const uint16_t address, const void *p_buffer)
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{
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if (p_buffer == NULL || (address + 8) > 0x2000)
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return;
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#if 1
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// eeprom wear reduction
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// only write the data if it's different to what's already there
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uint8_t buffer[8];
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EEPROM_ReadBuffer(address, buffer, 8);
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if (memcmp(p_buffer, buffer, 8) != 0)
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#endif
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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(p_buffer, 8);
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I2C_Stop();
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// give the EEPROM time to burn the data in (apparently takes 1.5ms ~ 5ms)
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SYSTEM_DelayMs(6);
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}
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}
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