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lib/iic/iic.cpp

@@ -0,0 +1,109 @@
+#include "iic.h"
+
+static inline void iic_Start(SW_Dev_IIC dev) {
+    dev.SDA_MODE(OUT);
+    dev.SDA_SET(HIGH);
+    dev.CLK_SET(HIGH);DELAY1US();
+    dev.SDA_SET(LOW);DELAY1US();
+    dev.CLK_SET(LOW);
+}
+
+//结束信号
+static inline void iic_Stop(SW_Dev_IIC dev) {
+    dev.SDA_MODE(OUT);
+    dev.CLK_SET(LOW);
+    dev.SDA_SET(LOW);DELAY1US();
+    dev.CLK_SET(HIGH);
+    dev.SDA_SET(HIGH);
+}
+
+//等待信号响应
+static inline uint8_t iic_WaitAck(SW_Dev_IIC dev, uint16_t timeout) {
+    uint16_t time = 0;
+    dev.SDA_MODE(IN);
+    dev.SDA_SET(HIGH);DELAY1US();
+    dev.CLK_SET(HIGH);DELAY1US();
+    while (dev.SDA()) {
+        time++;DELAY1US();
+        if (time > timeout) {
+            iic_Stop(dev);
+            return 1;
+        }
+    }
+    dev.CLK_SET(LOW);
+    return 0;
+}
+
+static inline void iic_Ack(SW_Dev_IIC dev) {
+    dev.CLK_SET(LOW);
+    dev.SDA_MODE(OUT);
+    dev.SDA_SET(LOW);DELAY1US();DELAY1US();
+    dev.CLK_SET(HIGH);DELAY1US();DELAY1US();
+    dev.CLK_SET(LOW);
+}
+
+static inline void iic_NAck(SW_Dev_IIC dev) {
+    dev.CLK_SET(LOW);
+    dev.SDA_MODE(OUT);
+    dev.SDA_SET(HIGH);DELAY1US();DELAY1US();
+    dev.CLK_SET(HIGH);DELAY1US();DELAY1US();
+    dev.CLK_SET(LOW);
+}
+
+//写入一个字节
+static inline void iic_W(SW_Dev_IIC dev, uint8_t date) {
+    dev.SDA_MODE(OUT);
+    uint8_t i;
+    for (i = 0; i < 8; i++) {
+        dev.CLK_SET(LOW);
+        if (date & 0x80) {
+            dev.SDA_SET(HIGH);
+        } else {
+            dev.SDA_SET(LOW);
+        }DELAY1US();DELAY1US();
+        dev.CLK_SET(HIGH);DELAY1US();DELAY1US();
+        dev.CLK_SET(LOW);DELAY1US();DELAY1US();
+        date <<= 1;
+    }
+}
+
+static inline uint8_t iic_R(SW_Dev_IIC dev, uint8_t ack) {
+    unsigned char i, read = 0;
+    dev.SDA_MODE(IN);
+    for (i = 0; i < 8; i++) {
+        dev.CLK_SET(LOW);DELAY1US();DELAY1US();
+        dev.CLK_SET(HIGH);
+        read <<= 1;
+        if (dev.SDA())read++;DELAY1US();
+    }
+    if (ack)
+        iic_Ack(dev);        //发送ACK
+    else
+        iic_NAck(dev);       //发送NACK
+    return read;
+}
+
+void SW_IIC_WL(SW_Dev_IIC Dev, uint8_t InternalAddress, uint8_t *Write_Data, uint32_t Len) {
+    iic_Start(Dev);
+    iic_W(Dev, Dev.ADD);
+    iic_WaitAck(Dev, 200);
+    iic_W(Dev, InternalAddress);
+    iic_WaitAck(Dev, 200);
+    for (uint32_t i = 0; i < Len; i++) {
+        iic_W(Dev, Write_Data[i]);
+        iic_WaitAck(Dev, 200);
+    }
+    iic_Stop(Dev);
+}
+
+void SW_IIC_RL(SW_Dev_IIC Dev, uint8_t InternalAddress, uint8_t *Read_Data, uint32_t Len, uint8_t Ack) {
+    iic_Start(Dev);
+    iic_W(Dev, Dev.ADD);
+    iic_WaitAck(Dev, 200);
+    iic_W(Dev, InternalAddress);
+    iic_WaitAck(Dev, 200);
+    for (uint32_t i = 0; i < Len; i++) {
+        Read_Data[i] = iic_R(Dev, Ack);
+    }
+    iic_Stop(Dev);
+}

lib/iic/inc/iic.h

@@ -0,0 +1,49 @@
+#ifndef SW_LIB_IIC_H
+#define SW_LIB_IIC_H
+#ifdef __cplusplus
+extern "C" {
+#endif
+#include <stdint.h>
+
+#define HIGH    1
+#define LOW     0
+#define IN      1
+#define OUT     0
+#define NOP()   ;
+#define DELAY1US() NOP()
+
+/**
+ * @brief   IIC设备结构体
+ **/
+typedef struct {
+    uint8_t (*CLK_SET)(uint8_t);    // 设置时钟引脚状态的函数指针
+    uint8_t (*SDA_SET)(uint8_t);    // 设置数据引脚状态的函数指针
+    uint8_t (*SDA)();                 // 读取数据引脚状态的函数指针
+    uint8_t (*SDA_MODE)(uint8_t);   // 设置数据引脚模式的函数指针
+    uint8_t ADD;                    // IIC设备地址
+} SW_Dev_IIC;
+
+/**
+ * @brief   向 IIC 设备写入数据流
+ * @param   Dev: [输入]               IIC设备结构体
+ * @param   InternalAddress: [输入]   内部地址
+ * @param   Write_Data: [输入]         要写入的数据流指针
+ * @param   Len: [输入]               数据流长度
+ * @return  void
+ **/
+void SW_IIC_WL(SW_Dev_IIC Dev, uint8_t InternalAddress, uint8_t *Write_Data, uint32_t Len);
+
+/**
+ * @brief   从 IIC 设备读取数据流
+ * @param   Dev: [输入]               IIC设备结构体
+ * @param   InternalAddress: [输入]   内部地址
+ * @param   Read_Data: [输出]         存储读取数据的缓冲区指针
+ * @param   Len: [输入]               读取数据流长度
+ * @param   Ack: [输入]               确认应答位
+ * @return  void
+ **/
+void SW_IIC_RL(SW_Dev_IIC Dev, uint8_t InternalAddress, uint8_t *Read_Data, uint32_t Len, uint8_t Ack);
+#ifdef __cplusplus
+}
+#endif
+#endif //SW_LIB_IIC_H