eeprom_i2c driver: added EXTERNAL_EEPROM_WP_PIN configuration option. (#12617)
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0e3ae2cde0
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dd16d3cc7e
2 changed files with 25 additions and 1 deletions
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@ -16,6 +16,9 @@
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#include <stdint.h>
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#include <string.h>
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#if defined(EXTERNAL_EEPROM_WP_PIN)
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# include "gpio.h"
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#endif
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/*
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Note that the implementations of eeprom_XXXX_YYYY on AVR are normally
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@ -50,7 +53,14 @@ static inline void fill_target_address(uint8_t *buffer, const void *addr) {
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}
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}
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void eeprom_driver_init(void) { i2c_init(); }
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void eeprom_driver_init(void) {
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i2c_init();
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#if defined(EXTERNAL_EEPROM_WP_PIN)
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/* We are setting the WP pin to high in a way that requires at least two bit-flips to change back to 0 */
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writePin(EXTERNAL_EEPROM_WP_PIN, 1);
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setPinInputHigh(EXTERNAL_EEPROM_WP_PIN);
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#endif
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}
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void eeprom_driver_erase(void) {
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#if defined(CONSOLE_ENABLE) && defined(DEBUG_EEPROM_OUTPUT)
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@ -89,6 +99,11 @@ void eeprom_write_block(const void *buf, void *addr, size_t len) {
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uint8_t * read_buf = (uint8_t *)buf;
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uintptr_t target_addr = (uintptr_t)addr;
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#if defined(EXTERNAL_EEPROM_WP_PIN)
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setPinOutput(EXTERNAL_EEPROM_WP_PIN);
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writePin(EXTERNAL_EEPROM_WP_PIN, 0);
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#endif
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while (len > 0) {
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uintptr_t page_offset = target_addr % EXTERNAL_EEPROM_PAGE_SIZE;
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int write_length = EXTERNAL_EEPROM_PAGE_SIZE - page_offset;
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@ -116,4 +131,10 @@ void eeprom_write_block(const void *buf, void *addr, size_t len) {
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target_addr += write_length;
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len -= write_length;
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}
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#if defined(EXTERNAL_EEPROM_WP_PIN)
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/* We are setting the WP pin to high in a way that requires at least two bit-flips to change back to 0 */
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writePin(EXTERNAL_EEPROM_WP_PIN, 1);
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setPinInputHigh(EXTERNAL_EEPROM_WP_PIN);
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#endif
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}
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