From e7101a7064d3e6da5a946d64bb0e43a77377e2f0 Mon Sep 17 00:00:00 2001
From: WXK <287788329@qq.com>
Date: 星期四, 22 五月 2025 18:11:43 +0800
Subject: [PATCH] 1.22，提交，待测试，给张博先修改
---
keil/include/drivers/lis3dh_driver.c | 208 ++++++++++++++++++++++++++-------------------------
1 files changed, 107 insertions(+), 101 deletions(-)
diff --git a/keil/include/drivers/lis3dh_driver.c b/keil/include/drivers/lis3dh_driver.c
index b22121f..7a4a0fb 100644
--- a/keil/include/drivers/lis3dh_driver.c
+++ b/keil/include/drivers/lis3dh_driver.c
@@ -165,19 +165,21 @@
}
-//void delay_us(uint32_t nTimer)
-//{
-// uint32_t i=0;
-// for(i=0;i<nTimer;i++){
-// __NOP();__NOP();__NOP();__NOP();__NOP();__NOP();__NOP();__NOP();__NOP();__NOP();
-// __NOP();__NOP();__NOP();__NOP();__NOP();__NOP();__NOP();__NOP();__NOP();__NOP();
-// __NOP();__NOP();__NOP();__NOP();__NOP();__NOP();__NOP();__NOP();__NOP();__NOP();
-// __NOP();__NOP();__NOP();__NOP();__NOP();__NOP();__NOP();__NOP();__NOP();__NOP();
-// __NOP();__NOP();__NOP();__NOP();__NOP();__NOP();__NOP();__NOP();__NOP();__NOP();
-// __NOP();__NOP();__NOP();__NOP();__NOP();__NOP();__NOP();__NOP();__NOP();__NOP();
-// __NOP();__NOP();__NOP();__NOP();
-// }
-//}
+static void delay_us(uint32_t nTimer)
+{
+ uint32_t i=0;
+ for(i=0;i<nTimer;i++){
+ __NOP();
+ __NOP();__NOP();__NOP();__NOP();__NOP();__NOP();__NOP();__NOP();__NOP();__NOP();
+ __NOP();__NOP();__NOP();__NOP();__NOP();__NOP();__NOP();__NOP();__NOP();__NOP();
+ __NOP();__NOP();__NOP();__NOP();__NOP();__NOP();__NOP();__NOP();__NOP();__NOP();
+ __NOP();__NOP();__NOP();__NOP();__NOP();__NOP();__NOP();__NOP();__NOP();__NOP();
+ __NOP();__NOP();__NOP();__NOP();__NOP();__NOP();__NOP();__NOP();__NOP();__NOP();
+ __NOP();__NOP();__NOP();__NOP();__NOP();__NOP();__NOP();__NOP();__NOP();__NOP();
+
+
+ }
+}
AxesRaw_t lis2dhdata;
//OLED初始化IIC
@@ -484,131 +486,135 @@
return acc_g;
}
-
+void IIC2_SDA_OUT()
+{
+gpio_pin_set_dir(SDA_PIN , GPIO_DIR_OUT, 1);
+}
+void IIC2_SDA_IN()
+{
+gpio_pin_set_dir(SDA_PIN,GPIO_DIR_IN,1); //SDA设置为输入等待接收端的应答信号
+}
//产生IIC起始信号
void IIC2_Start(void)
{
-// IIC2_SDA_OUT(); //sda线输出
- SDA_1;
+ IIC2_SDA_OUT(); //sda线输出
+ SDA_1;
+// delay_us(10);
+ SCL_1;
// delay_us(10);
- SCL_1;
-// delay_us(10);
- SDA_0;//START:when CLK is high,DATA change form high to low
- delay_us(10);
- SCL_0;//钳住I2C总线，准备发送或接收数据
-}
+ SDA_0;//START:when CLK is high,DATA change form high to low
+ delay_us(10);
+ SCL_0;//钳住I2C总线，准备发送或接收数据
+}
//产生IIC停止信号
void IIC2_Stop(void)
{
-// IIC2_SDA_OUT();//sda线输出
- SCL_0;
+ IIC2_SDA_OUT();//sda线输出
+ SCL_0;
// delay_us(10);
- SDA_0;//STOP:when CLK is high DATA change form low to high
- delay_us(10);
- SCL_1;
+ SDA_0;//STOP:when CLK is high DATA change form low to high
+ delay_us(10);
+ SCL_1;
// delay_us(10);
- SDA_1;//发送I2C总线结束信号
- delay_us(10);
+ SDA_1;//发送I2C总线结束信号
+ delay_us(10);
}
//等待应答信号到来
//返回值：1，接收应答失败
// 0，接收应答成功
-
uint8_t IIC2_Wait_Ack(void)
{
- uint8_t ucErrTime=0;
-// IIC2_SDA_IN(); //SDA设置为输入
- gpio_pin_set_dir(SDA_PIN , GPIO_DIR_IN, 1);
- SDA_1;
- delay_us(6);
- SCL_1;
- delay_us(6);
+ uint8_t ucErrTime=0;
+IIC2_SDA_IN();
+ SDA_1;
+ delay_us(15);
+ SCL_1;
+ delay_us(15);
- while(IIC2_READ_SDA)
- {
- ucErrTime++;
- if(ucErrTime>250)
- {
- IIC2_Stop();
- return 1;
- }
- }
- gpio_pin_set_dir(SDA_PIN , GPIO_DIR_OUT, 1);
- SCL_0;//时钟输出0
- return 0;
-}
+ while(IIC2_READ_SDA)
+ {
+ ucErrTime++;
+ if(ucErrTime>250)
+ {
+ IIC2_Stop();
+ return 1;
+ }
+ }
+ SCL_0;//时钟输出0
+ return 0;
+}
//产生ACK应答
void IIC2_Ack(void)
{
- SCL_0;
-// IIC2_SDA_OUT();
- SDA_0;
- delay_us(10);
- SCL_1;
- delay_us(10);
- SCL_0;
+ SCL_0;
+ IIC2_SDA_OUT();
+ SDA_0;
+ delay_us(10);
+ SCL_1;
+ delay_us(10);
+ SCL_0;
}
-//不产生ACK应答
+//不产生ACK应答
void IIC2_NAck(void)
{
- SCL_0;
-// IIC2_SDA_OUT();
- SDA_1;
- delay_us(10);
- SCL_1;
- delay_us(10);
- SCL_0;
+ SCL_0;
+ IIC2_SDA_OUT();
+ SDA_1;
+ delay_us(10);
+ SCL_1;
+ delay_us(10);
+ SCL_0;
}
//IIC发送一个字节,WRITE
//返回从机有无应答
//1，有应答
-//0，无应答
+//0，无应答
void IIC2_Send_Byte(uint8_t txd)
-{
- uint8_t t;
-// IIC2_SDA_OUT();
- SCL_0;//拉低时钟开始数据传输
- for(t=0; t<8; t++)
- {
- if((txd&0x80)>>7)
- {
- SDA_1;
- }
- else
- {
- SDA_0;
- }
- txd <<= 1;
- delay_us(10);
- SCL_1;
- delay_us(10);
- SCL_0;
- delay_us(10);
- }
-}
+{
+ uint8_t t;
+ IIC2_SDA_OUT();
+ SCL_0;//拉低时钟开始数据传输
+ for(t=0;t<8;t++)
+ {
+ if((txd&0x80)>>7)
+ {
+ SDA_1;
+ }
+ else
+ {
+ SDA_0;
+ }
+ txd <<= 1;
+ delay_us(10);
+ SCL_1;
+ delay_us(10);
+ SCL_0;
+ delay_us(10);
+ }
+}
-//读1个字节，ack=1时，发送ACK，ack=0，发送nACK
+//读1个字节，ack=1时，发送ACK，ack=0，发送nACK
uint8_t IIC2_Read_Byte(unsigned char ack)
{
- unsigned char i,receive=0;
-// IIC2_SDA_IN();//SDA设置为输入
- for(i=0; i<8; i++ )
- {
- SCL_0;
- delay_us(10);
- SCL_1;
- receive<<=1;
- if(IIC2_READ_SDA)receive++;
- delay_us(5);
- }
+ unsigned char i,receive=0;
+ IIC2_SDA_IN();//SDA设置为输入
+ for(i=0;i<8;i++ )
+ {
+ SCL_0;
+ delay_us(10);
+ SCL_1;
+ receive<<=1;
+ if(IIC2_READ_SDA)receive++;
+ delay_us(5);
+ }
if (!ack)
IIC2_NAck();//发送nACK
else
- IIC2_Ack(); //发送ACK
+ IIC2_Ack(); //发送ACK
return receive;
}
--
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