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