需要自己实现读、写、延时这三个函数

2026-02-27 15:51:32 +08:00
parent faeda84509
commit dbd7ec92ca
4 changed files with 264 additions and 2 deletions
--- a/module/Int_EEPROM24xx.c
+++ b/module/Int_EEPROM24xx.c
@@ -0,0 +1,59 @@
+#include "Int_EEPROM24xx.h"
+
+/* 直接透传到用户提供的总线读回调。 */
+IntEEPROM_Result_t Int_EEPROM24xx_Read(const IntEEPROM24xx_t *dev, uint32_t mem_addr, uint8_t *buf, uint16_t len)
+{
+    if (dev == NULL || buf == NULL || len == 0u || dev->bus_read == NULL)
+    {
+        return INT_EEPROM_ERR_ARG;
+    }
+
+    return dev->bus_read(dev->ctx, dev->dev_addr, mem_addr, dev->mem_addr_size, buf, len, dev->timeout_ms);
+}
+
+/* 按页拆分写入，避免跨页写导致 EEPROM 数据回卷或写失败。 */
+IntEEPROM_Result_t Int_EEPROM24xx_Write(const IntEEPROM24xx_t *dev, uint32_t mem_addr, const uint8_t *buf, uint16_t len)
+{
+    uint16_t written = 0;
+    uint16_t chunk;
+    uint32_t cur_addr;
+    uint16_t page_off;
+    uint16_t room;
+    IntEEPROM_Result_t st;
+
+    if (dev == NULL || buf == NULL || len == 0u || dev->page_size == 0u || dev->bus_write == NULL)
+    {
+        return INT_EEPROM_ERR_ARG;
+    }
+
+    while (written < len)
+    {
+        /* 计算当前页内偏移和本次最多可写长度。 */
+        cur_addr = mem_addr + written;
+        page_off = (uint16_t)(cur_addr % dev->page_size);
+        room = (uint16_t)(dev->page_size - page_off);
+        chunk = (uint16_t)(((len - written) < room) ? (len - written) : room);
+
+        /* 实际总线写由平台适配层完成。 */
+        st = dev->bus_write(dev->ctx,
+                            dev->dev_addr,
+                            cur_addr,
+                            dev->mem_addr_size,
+                            (const uint8_t *)(buf + written),
+                            chunk,
+                            dev->timeout_ms);
+        if (st != INT_EEPROM_OK)
+        {
+            return st;
+        }
+
+        if (dev->delay_ms != NULL && dev->write_cycle_ms > 0u)
+        {
+            /* EEPROM 页写后通常需要写周期时间。 */
+            dev->delay_ms(dev->ctx, dev->write_cycle_ms);
+        }
+        written = (uint16_t)(written + chunk);
+    }
+
+    return INT_EEPROM_OK;
+}