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@ -35,44 +35,50 @@
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#include "../HAL.h"
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#include <Wire.h>
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#ifndef EEPROM_WRITE_DELAY
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#define EEPROM_WRITE_DELAY 5
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#endif
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// ------------------------
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// Private Variables
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// ------------------------
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static constexpr uint8_t eeprom_device_address = I2C_ADDRESS(0x50);
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#ifndef EEPROM_DEVICE_ADDRESS
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#define EEPROM_DEVICE_ADDRESS 0x50
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#endif
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static constexpr uint8_t eeprom_device_address = I2C_ADDRESS(EEPROM_DEVICE_ADDRESS);
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// ------------------------
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// Public functions
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// ------------------------
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static void eeprom_init() {
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Wire.begin();
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}
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static void eeprom_init() { Wire.begin(); }
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void eeprom_write_byte(uint8_t *pos, unsigned char value) {
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unsigned eeprom_address = (unsigned) pos;
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eeprom_init();
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const unsigned eeprom_address = (unsigned)pos;
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Wire.beginTransmission(eeprom_device_address);
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Wire.write((int)(eeprom_address >> 8)); // MSB
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Wire.write((int)(eeprom_address & 0xFF)); // LSB
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Wire.write(int(eeprom_address >> 8)); // MSB
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Wire.write(int(eeprom_address & 0xFF)); // LSB
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Wire.write(value);
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Wire.endTransmission();
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// wait for write cycle to complete
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// this could be done more efficiently with "acknowledge polling"
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delay(5);
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delay(EEPROM_WRITE_DELAY);
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}
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// WARNING: address is a page address, 6-bit end will wrap around
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// also, data can be maximum of about 30 bytes, because the Wire library has a buffer of 32 bytes
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void eeprom_update_block(const void *pos, void* eeprom_address, size_t n) {
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void eeprom_update_block(const void *pos, void *__dst, size_t n) {
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const unsigned eeprom_address = (unsigned)__dst;
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eeprom_init();
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Wire.beginTransmission(eeprom_device_address);
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Wire.write((int)((unsigned)eeprom_address >> 8)); // MSB
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Wire.write((int)((unsigned)eeprom_address & 0xFF)); // LSB
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Wire.write(int(eeprom_address >> 8)); // MSB
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Wire.write(int(eeprom_address & 0xFF)); // LSB
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Wire.endTransmission();
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uint8_t *ptr = (uint8_t*)pos;
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@ -83,37 +89,37 @@ void eeprom_update_block(const void *pos, void* eeprom_address, size_t n) {
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if (flag) {
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Wire.beginTransmission(eeprom_device_address);
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Wire.write((int)((unsigned)eeprom_address >> 8)); // MSB
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Wire.write((int)((unsigned)eeprom_address & 0xFF)); // LSB
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Wire.write(int(eeprom_address >> 8)); // MSB
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Wire.write(int(eeprom_address & 0xFF)); // LSB
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Wire.write((uint8_t*)pos, n);
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Wire.endTransmission();
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// wait for write cycle to complete
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// this could be done more efficiently with "acknowledge polling"
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delay(5);
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delay(EEPROM_WRITE_DELAY);
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}
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}
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uint8_t eeprom_read_byte(uint8_t *pos) {
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unsigned eeprom_address = (unsigned)pos;
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eeprom_init();
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const unsigned eeprom_address = (unsigned)pos;
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Wire.beginTransmission(eeprom_device_address);
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Wire.write((int)(eeprom_address >> 8)); // MSB
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Wire.write((int)(eeprom_address & 0xFF)); // LSB
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Wire.write(int(eeprom_address >> 8)); // MSB
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Wire.write(int(eeprom_address & 0xFF)); // LSB
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Wire.endTransmission();
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Wire.requestFrom(eeprom_device_address, (byte)1);
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return Wire.available() ? Wire.read() : 0xFF;
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}
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// Don't read more than 30..32 bytes at a time!
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void eeprom_read_block(void* pos, const void* eeprom_address, size_t n) {
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void eeprom_read_block(void* pos, const void *__dst, size_t n) {
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const unsigned eeprom_address = (unsigned)__dst;
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eeprom_init();
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Wire.beginTransmission(eeprom_device_address);
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Wire.write((int)((unsigned)eeprom_address >> 8)); // MSB
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Wire.write((int)((unsigned)eeprom_address & 0xFF)); // LSB
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Wire.write(int(eeprom_address >> 8)); // MSB
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Wire.write(int(eeprom_address & 0xFF)); // LSB
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Wire.endTransmission();
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Wire.requestFrom(eeprom_device_address, (byte)n);
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for (byte c = 0; c < n; c++ )
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randellhodges
5 years ago
committed by
GitHub