60 lines
1.9 KiB
C
60 lines
1.9 KiB
C
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#include "Int_EEPROM24xx.h"
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/* 直接透传到用户提供的总线读回调。 */
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IntEEPROM_Result_t Int_EEPROM24xx_Read(const IntEEPROM24xx_t *dev, uint32_t mem_addr, uint8_t *buf, uint16_t len)
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{
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if (dev == NULL || buf == NULL || len == 0u || dev->bus_read == NULL)
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{
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return INT_EEPROM_ERR_ARG;
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}
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return dev->bus_read(dev->ctx, dev->dev_addr, mem_addr, dev->mem_addr_size, buf, len, dev->timeout_ms);
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}
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/* 按页拆分写入，避免跨页写导致 EEPROM 数据回卷或写失败。 */
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IntEEPROM_Result_t Int_EEPROM24xx_Write(const IntEEPROM24xx_t *dev, uint32_t mem_addr, const uint8_t *buf, uint16_t len)
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{
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uint16_t written = 0;
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uint16_t chunk;
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uint32_t cur_addr;
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uint16_t page_off;
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uint16_t room;
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IntEEPROM_Result_t st;
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if (dev == NULL || buf == NULL || len == 0u || dev->page_size == 0u || dev->bus_write == NULL)
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{
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return INT_EEPROM_ERR_ARG;
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}
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while (written < len)
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{
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/* 计算当前页内偏移和本次最多可写长度。 */
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cur_addr = mem_addr + written;
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page_off = (uint16_t)(cur_addr % dev->page_size);
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room = (uint16_t)(dev->page_size - page_off);
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chunk = (uint16_t)(((len - written) < room) ? (len - written) : room);
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/* 实际总线写由平台适配层完成。 */
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st = dev->bus_write(dev->ctx,
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dev->dev_addr,
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cur_addr,
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dev->mem_addr_size,
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(const uint8_t *)(buf + written),
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chunk,
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dev->timeout_ms);
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if (st != INT_EEPROM_OK)
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{
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return st;
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}
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if (dev->delay_ms != NULL && dev->write_cycle_ms > 0u)
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{
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/* EEPROM 页写后通常需要写周期时间。 */
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dev->delay_ms(dev->ctx, dev->write_cycle_ms);
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}
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written = (uint16_t)(written + chunk);
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}
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return INT_EEPROM_OK;
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}
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