基于RFbeam的V-LD1-60GHz毫米波雷达传感器数据获取（通过UART串口来控制模块）
工程：
Keil工程资源
文章目录
V-LD1
该模块是由串口进行控制的
串口协议结构体如下：
#pragma pack(1)
typedef struct
{
char Header[4];
uint32_t Length;
uint8_t DATA[43];
}V_LD1_Struct;
#pragma pack()
头文字是ASCII码字符串格式
然后四字节的Length表示DATA数据长度
数据位小端格式
通信方式就是先发一个命令 然后等待RESP返回 随后就是命令对应的数据
INIT命令支持修改波特率 但第一次发的时候必须用115200
修改波特率后 直到GBYE命令或复位、断电之前 都是修改后的波特率
命令发送
读取雷达命令就是GNFD 另外配置雷达参数则是SRPS
消息回复
发什么命令 就按什么格式回复 但RESP是肯定会最先回复的
另外 读雷达参数用GRPS命令
通信示例
雷达数据获取
通过GNFD命令获取雷达数据
如果不需要读大量数据 可以只使用115200
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宏定义
#ifndef __V_LD1_H__
#define __V_LD1_H__
#include "main.h"
#pragma pack(1)
typedef struct
{
char Header[4];
uint32_t Length;
uint8_t DATA[43];
}V_LD1_Struct;
#pragma pack()
#pragma pack(1)
typedef struct
{
char Version[19];
char Unique_ID[12];
uint8_t Distance_Range;
uint8_t Threshold_Offset;
uint16_t Min_Range_Filter;
uint16_t Max_Range_Filter;
uint8_t Distance_Average_Count;
uint8_t Target_Filter;
uint8_t Distance_Precision;
uint8_t TX_Power;
uint8_t Chirp_Integration_Count;
uint8_t Short_Range_Distance_Filter;
}V_LD1_Radar_Parameter_Struct;
#pragma pack()
#pragma pack(1)
typedef struct
{
uint16_t ADC_Value[1024];
}V_LD1_RADC_Struct;
#pragma pack()
#pragma pack(1)
typedef struct
{
uint16_t Spectrum_Point[512];
uint16_t Threshold_Point[512];
}V_LD1_RFFT_Struct;
#pragma pack()
#pragma pack(1)
typedef struct
{
float Distance;
uint16_t Magnitude_Of_Target;
}V_LD1_PDAT_Struct;
#pragma pack()
#pragma pack(1)
typedef struct
{
uint32_t Frame_ID;
}V_LD1_DONE_Struct;
#pragma pack()
typedef enum
{
V_LD1_GNFD_RADC = (1<<0),
V_LD1_GNFD_RFFT = (1<<1),
V_LD1_GNFD_PDAT = (1<<2),
V_LD1_GNFD_DONE = (1<<5),
}V_LD1_GNFD_Enum;
typedef enum
{
V_LD1_RESP_OK = 0,
V_LD1_RESP_Unknown_CMD = 1,
V_LD1_RESP_Invalid_Parameter_Value = 2,
V_LD1_RESP_Invalid_RPST_Version = 3,
V_LD1_RESP_UART_Error = 4,
V_LD1_RESP_No_Calibration_Value = 5,
V_LD1_RESP_Timeout = 6,
V_LD1_RESP_NO_Programmed = 7,
}V_LD1_RESP_Enum;
extern uint8_t V_LD1_Status;
extern uint8_t V_LD1_RxBit;
extern uint8_t V_LD1_RxBuffer[1024];
extern uint8_t V_LD1_RxFlag;
extern V_LD1_Radar_Parameter_Struct V_LD1_Radar_Parameter_Global;
void Init_V_LD1(void);
void Read_V_LD1_Radar(void);
#endif
通信代码
# include "V_LD1.h"
uint8_t V_LD1_RxBit=0;
uint8_t V_LD1_RxBuffer[1024]={
0};
uint8_t V_LD1_RxFlag=0;
uint8_t V_LD1_Status=0;
V_LD1_Radar_Parameter_Struct V_LD1_Radar_Parameter_Global={
0};
V_LD1_Struct Read_V_LD1_Stu(void)
{
V_LD1_Struct V_LD1_Stu;
memset(&V_LD1_Stu,0,sizeof(V_LD1_Stu));
uint8_t i=0;
while(V_LD1_Status<2)
{
i++;
delay_ms(10);
if(i>=50)
{
V_LD1_RxBit=0;
V_LD1_Status=0;
V_LD1_RxFlag=0;
return V_LD1_Stu;
}
}
memcpy(&V_LD1_Stu.Header[0],&V_LD1_RxBuffer[0],4);
memcpy(&V_LD1_Stu.Length,&V_LD1_RxBuffer[4],4);
memcpy(&V_LD1_Stu.DATA[0],&V_LD1_RxBuffer[8],V_LD1_Stu.Length);
V_LD1_RxBit=0;
V_LD1_Status=0;
V_LD1_RxFlag=0;
return V_LD1_Stu;
}
void Send_V_LD1_Stu(V_LD1_Struct V_LD1_Stu)
{
uint8_t buf[51]={
0};
memcpy(buf,&V_LD1_Stu,V_LD1_Stu.Length+8);
V_LD1_RxBit=0;
V_LD1_Status=0;
V_LD1_RxFlag=0;
HAL_UART_Transmit(&V_LD1_UART_Handle,buf,V_LD1_Stu.Length+8,0xFFFF);
}
int Read_V_LD1_RESP(void)
{
V_LD1_Struct V_LD1_Stu=Read_V_LD1_Stu();
if (V_LD1_Stu.Header[0]=='R' && V_LD1_Stu.Header[1]=='E' && V_LD1_Stu.Header[2]=='S' && V_LD1_Stu.Header[3]=='P' && V_LD1_Stu.Length==1)
{
return V_LD1_Stu.DATA[0];
}
else
{
return -1;
}
}
int Read_V_LD1_VERS(V_LD1_Struct* V_LD1)
{
V_LD1_Struct V_LD1_Stu=Read_V_LD1_Stu();
if (V_LD1_Stu.Header[0]=='V' && V_LD1_Stu.Header[1]=='E' && V_LD1_Stu.Header[2]=='R' && V_LD1_Stu.Header[3]=='S' && V_LD1_Stu.Length==19)
{
memcpy(V_LD1,&V_LD1_Stu,27);
return 0;
}
else
{
return -1;
}
}
void Read_V_LD1_Radar(void)
{
V_LD1_Struct V_LD1_Stu={
0};
V_LD1_PDAT_Struct PDAT_Stu = {
0};
GUI_Struct Stu={
0};
uint8_t RESP_Code=0;
memcpy(&V_LD1_Stu.Header[0],"GNFD",4);
V_LD1_Stu.Length=1;
V_LD1_Stu.DATA[0]=0|V_LD1_GNFD_PDAT;
Send_V_LD1_Stu(V_LD1_Stu);
RESP_Code=Read_V_LD1_RESP();
printf("[INFO] GNFD PDAT RESP: %d\n",RESP_Code);
V_LD1_Stu=Read_V_LD1_Stu();
if (V_LD1_Stu.Header[0]=='P' && V_LD1_Stu.Header[1]=='D' && V_LD1_Stu.Header[2]=='A' && V_LD1_Stu.Header[3]=='T' && V_LD1_Stu.Length==6)
{
memcpy(&PDAT_Stu,&V_LD1_Stu.DATA[0],6);
printf("[INFO] PDAT: %f %d\n",PDAT_Stu.Distance,PDAT_Stu.Magnitude_Of_Target);
Stu.COM=0x00;
Stu.BCNT[0]=0;
Stu.BCNT[1]=6;
memcpy(&Stu.DATA[0],&PDAT_Stu,6);
GUI_Slave_Send(Stu);
}
}
void Init_Radar_Parameter(void)
{
V_LD1_Radar_Parameter_Global.Distance_Range=0;
V_LD1_Radar_Parameter_Global.Threshold_Offset=60;
V_LD1_Radar_Parameter_Global.Min_Range_Filter=5;
V_LD1_Radar_Parameter_Global.Max_Range_Filter=460;
V_LD1_Radar_Parameter_Global.Distance_Average_Count=5;
V_LD1_Radar_Parameter_Global.Target_Filter=0;
V_LD1_Radar_Parameter_Global.Distance_Precision=1;
V_LD1_Radar_Parameter_Global.TX_Power=31;
V_LD1_Radar_Parameter_Global.Chirp_Integration_Count=20;
V_LD1_Radar_Parameter_Global.Short_Range_Distance_Filter=0;
}
void Init_V_LD1(void)
{
V_LD1_Struct V_LD1_Stu={
0};
V_LD1_RxBit=0;
V_LD1_Status=0;
V_LD1_RxFlag=0;
uint8_t RESP_Code=0;
memset(V_LD1_RxBuffer,0,sizeof(V_LD1_RxBuffer));
memcpy(&V_LD1_Stu.Header[0],"RFSE",4);
V_LD1_Stu.Length=0;
Send_V_LD1_Stu(V_LD1_Stu);
RESP_Code=Read_V_LD1_RESP();
printf("[INFO] RFSE RESP: %d\n",RESP_Code);
memcpy(&V_LD1_Stu.Header[0],"INIT",4);
V_LD1_Stu.Length=1;
V_LD1_Stu.DATA[0]=0;
Send_V_LD1_Stu(V_LD1_Stu);
RESP_Code=Read_V_LD1_RESP();
printf("[INFO] INIT RESP: %d\n",RESP_Code);
if(RESP_Code==V_LD1_RESP_OK)
{
if(Read_V_LD1_VERS(&V_LD1_Stu)==0)
{
printf("[INFO] V_LD1_Version: %s\n",V_LD1_Stu.DATA);
memcpy(&V_LD1_Radar_Parameter_Global.Version[0],&V_LD1_Stu.DATA[0],19);
}
}
memcpy(&V_LD1_Stu.Header[0],"TGFI",4);
V_LD1_Stu.Length=1;
V_LD1_Stu.DATA[0]=0 ;
Send_V_LD1_Stu(V_LD1_Stu);
RESP_Code=Read_V_LD1_RESP();
printf("[INFO] TGFI RESP: %d\n",RESP_Code);
memcpy(&V_LD1_Stu.Header[0],"INTN",4);
V_LD1_Stu.Length=1;
V_LD1_Stu.DATA[0]=20;
Send_V_LD1_Stu(V_LD1_Stu);
RESP_Code=Read_V_LD1_RESP();
printf("[INFO] INTN RESP: %d\n",RESP_Code);
memcpy(&V_LD1_Stu.Header[0],"SRDF",4);
V_LD1_Stu.Length=1;
V_LD1_Stu.DATA[0]=0;
Send_V_LD1_Stu(V_LD1_Stu);
RESP_Code=Read_V_LD1_RESP();
printf("[INFO] SRDF RESP: %d\n",RESP_Code);
Read_V_LD1_Radar();
}
运行效果
附录：Cortex-M架构的SysTick系统定时器精准延时和MCU位带操作
SysTick系统定时器精准延时
延时函数
SysTick->LOAD中的值为计数值
计算方法为工作频率值/分频值
比如工作频率/1000 则周期为1ms
以ADuCM4050为例：
#include "ADuCM4050.h"
void delay_ms(unsigned int ms)
{
SysTick->LOAD = 26000000/1000-1; // Count from 255 to 0 (256 cycles) 载入计数值 定时器从这个值开始计数
SysTick->VAL = 0; // Clear current value as well as count flag 清空计数值到达0后的标记
SysTick->CTRL = 5; // Enable SysTick timer with processor clock 使能52MHz的系统定时器
while(ms--)
{
while ((SysTick->CTRL & 0x00010000)==0);// Wait until count flag is set 等待
}
SysTick->CTRL = 0; // Disable SysTick 关闭系统定时器
}
void delay_us(unsigned int us)
{
SysTick->LOAD = 26000000/1000/1000-1; // Count from 255 to 0 (256 cycles) 载入计数值 定时器从这个值开始计数
SysTick->VAL = 0; // Clear current value as well as count flag 清空计数值到达0后的标记
SysTick->CTRL = 5; // Enable SysTick timer with processor clock 使能52MHz的系统定时器
while(us--)
{
while ((SysTick->CTRL & 0x00010000)==0);// Wait until count flag is set 等待
}
SysTick->CTRL = 0; // Disable SysTick 关闭系统定时器
}
其中的52000000表示芯片的系统定时器频率 32系列一般为外部定时器频率的两倍
Cortex-M架构SysTick系统定时器阻塞和非阻塞延时
阻塞延时
首先是最常用的阻塞延时
void delay_ms(unsigned int ms)
{
SysTick->LOAD = 50000000/1000-1; // Count from 255 to 0 (256 cycles) 载入计数值 定时器从这个值开始计数
SysTick->VAL = 0; // Clear current value as well as count flag 清空计数值到达0后的标记
SysTick->CTRL = 5; // Enable SysTick timer with processor clock 使能26MHz的系统定时器
while(ms--)
{
while ((SysTick->CTRL & 0x00010000)==0);// Wait until count flag is set 等待
}
SysTick->CTRL = 0; // Disable SysTick 关闭系统定时器
}
void delay_us(unsigned int us)
{
SysTick->LOAD = 50000000/1000/1000-1; // Count from 255 to 0 (256 cycles) 载入计数值 定时器从这个值开始计数
SysTick->VAL = 0; // Clear current value as well as count flag 清空计数值到达0后的标记
SysTick->CTRL = 5; // Enable SysTick timer with processor clock 使能26MHz的系统定时器
while(us--)
{
while ((SysTick->CTRL & 0x00010000)==0);// Wait until count flag is set 等待
}
SysTick->CTRL = 0; // Disable SysTick 关闭系统定时器
}
50000000表示工作频率
分频后即可得到不同的延时时间
以此类推
那么 不用两个嵌套while循环 也可以写成：
void delay_ms(unsigned int ms)
{
SysTick->LOAD = 50000000/1000*ms-1; // Count from 255 to 0 (256 cycles) 载入计数值 定时器从这个值开始计数
SysTick->VAL = 0; // Clear current value as well as count flag 清空计数值到达0后的标记
SysTick->CTRL = 5; // Enable SysTick timer with processor clock 使能26MHz的系统定时器
while ((SysTick->CTRL & 0x00010000)==0);// Wait until count flag is set 等待
SysTick->CTRL = 0; // Disable SysTick 关闭系统定时器
}
void delay_us(unsigned int us)
{
SysTick->LOAD = 50000000/1000/1000*us-1; // Count from 255 to 0 (256 cycles) 载入计数值 定时器从这个值开始计数
SysTick->VAL = 0; // Clear current value as well as count flag 清空计数值到达0后的标记
SysTick->CTRL = 5; // Enable SysTick timer with processor clock 使能26MHz的系统定时器
while ((SysTick->CTRL & 0x00010000)==0);// Wait until count flag is set 等待
SysTick->CTRL = 0; // Disable SysTick 关闭系统定时器
}
但是这种写法有个弊端
那就是输入ms后，最大定时不得超过计数值，也就是不能超过LOAD的最大值，否则溢出以后，则无法正常工作
而LOAD如果最大是32位 也就是4294967295
晶振为50M的话 50M的计数值为1s 4294967295计数值约为85s
固最大定时时间为85s
但用嵌套while的话 最大可以支持定时4294967295*85s
非阻塞延时
如果采用非阻塞的话 直接改写第二种方法就好了：
void delay_ms(unsigned int ms)
{
SysTick->LOAD = 50000000/1000*ms-1; // Count from 255 to 0 (256 cycles) 载入计数值 定时器从这个值开始计数
SysTick->VAL = 0; // Clear current value as well as count flag 清空计数值到达0后的标记
SysTick->CTRL = 5; // Enable SysTick timer with processor clock 使能26MHz的系统定时器
//while ((SysTick->CTRL & 0x00010000)==0);// Wait until count flag is set 等待
//SysTick->CTRL = 0; // Disable SysTick 关闭系统定时器
}
void delay_us(unsigned int us)
{
SysTick->LOAD = 50000000/1000/1000*us-1; // Count from 255 to 0 (256 cycles) 载入计数值 定时器从这个值开始计数
SysTick->VAL = 0; // Clear current value as well as count flag 清空计数值到达0后的标记
SysTick->CTRL = 5; // Enable SysTick timer with processor clock 使能26MHz的系统定时器
//while ((SysTick->CTRL & 0x00010000)==0);// Wait until count flag is set 等待
//SysTick->CTRL = 0; // Disable SysTick 关闭系统定时器
}
将等待和关闭定时器语句去掉
在使用时加上判断即可变为阻塞：
delay_ms(500);
while ((SysTick->CTRL & 0x00010000)==0);
SysTick->CTRL = 0;
在非阻塞状态下 可以提交定时器后 去做别的事情 然后再来等待
不过这样又有一个弊端 那就是定时器会自动重载 可能做别的事情以后 定时器跑过了 然后就要等85s才能停下
故可以通过内部定时器来进行非阻塞延时函数的编写
基本上每个mcu的内部定时器都可以配置自动重载等功能 网上资料很多 这里就不再阐述了
位带操作
位带代码
M3、M4架构的单片机 其输出口地址为端口地址+20 输入为+16
M0架构的单片机 其输出口地址为端口地址+12 输入为+8
以ADuCM4050为列：
位带宏定义
#ifndef __GPIO_H__
#define __GPIO_H__
#include "ADuCM4050.h"
#include "adi_gpio.h"
#define BITBAND(addr, bitnum) ((addr & 0xF0000000)+0x2000000+((addr &0xFFFFF)<<5)+(bitnum<<2))
#define MEM_ADDR(addr) *((volatile unsigned long *)(addr))
#define BIT_ADDR(addr, bitnum) MEM_ADDR(BITBAND(addr, bitnum))
#define GPIO0_ODR_Addr (ADI_GPIO0_BASE+20) //0x40020014
#define GPIO0_IDR_Addr (ADI_GPIO0_BASE+16) //0x40020010
#define GPIO1_ODR_Addr (ADI_GPIO1_BASE+20) //0x40020054
#define GPIO1_IDR_Addr (ADI_GPIO1_BASE+16) //0x40020050
#define GPIO2_ODR_Addr (ADI_GPIO2_BASE+20) //0x40020094
#define GPIO2_IDR_Addr (ADI_GPIO2_BASE+16) //0x40020090
#define GPIO3_ODR_Addr (ADI_GPIO3_BASE+20) //0x400200D4
#define GPIO3_IDR_Addr (ADI_GPIO3_BASE+16) //0x400200D0
#define P0_O(n) BIT_ADDR(GPIO0_ODR_Addr,n) //输出
#define P0_I(n) BIT_ADDR(GPIO0_IDR_Addr,n) //输入
#define P1_O(n) BIT_ADDR(GPIO1_ODR_Addr,n) //输出
#define P1_I(n) BIT_ADDR(GPIO1_IDR_Addr,n) //输入
#define P2_O(n) BIT_ADDR(GPIO2_ODR_Addr,n) //输出
#define P2_I(n) BIT_ADDR(GPIO2_IDR_Addr,n) //输入
#define P3_O(n) BIT_ADDR(GPIO3_ODR_Addr,n) //输出
#define P3_I(n) BIT_ADDR(GPIO3_IDR_Addr,n) //输入
#define Port0 (ADI_GPIO_PORT0)
#define Port1 (ADI_GPIO_PORT1)
#define Port2 (ADI_GPIO_PORT2)
#define Port3 (ADI_GPIO_PORT3)
#define Pin0 (ADI_GPIO_PIN_0)
#define Pin1 (ADI_GPIO_PIN_1)
#define Pin2 (ADI_GPIO_PIN_2)
#define Pin3 (ADI_GPIO_PIN_3)
#define Pin4 (ADI_GPIO_PIN_4)
#define Pin5 (ADI_GPIO_PIN_5)
#define Pin6 (ADI_GPIO_PIN_6)
#define Pin7 (ADI_GPIO_PIN_7)
#define Pin8 (ADI_GPIO_PIN_8)
#define Pin9 (ADI_GPIO_PIN_9)
#define Pin10 (ADI_GPIO_PIN_10)
#define Pin11 (ADI_GPIO_PIN_11)
#define Pin12 (ADI_GPIO_PIN_12)
#define Pin13 (ADI_GPIO_PIN_13)
#define Pin14 (ADI_GPIO_PIN_14)
#define Pin15 (ADI_GPIO_PIN_15)
void GPIO_OUT(unsigned int port,unsigned int pin,unsigned int flag);
void GPIO_BUS_OUT(unsigned int port,unsigned int num);
void P0_BUS_O(unsigned int num);
unsigned int P0_BUS_I(void);
void P1_BUS_O(unsigned int num);
unsigned int P1_BUS_I(void);
void P2_BUS_O(unsigned int num);
unsigned int P2_BUS_I(void);
void P3_BUS_O(unsigned int num);
unsigned int P3_BUS_I(void);
#endif
总线函数
#include "ADuCM4050.h"
#include "adi_gpio.h"
#include "GPIO.h"
void GPIO_OUT(unsigned int port,unsigned int pin,unsigned int flag)
{
switch(port)
{
case 0:{
switch(pin)
{
case 0:if(flag==1){
adi_gpio_SetHigh((ADI_GPIO_PORT0),(ADI_GPIO_PIN_0));}else{
adi_gpio_SetLow((ADI_GPIO_PORT0),(ADI_GPIO_PIN_0));};break;
case 1:if(flag==1){
adi_gpio_SetHigh((ADI_GPIO_PORT0),(ADI_GPIO_PIN_1));}else{
adi_gpio_SetLow((ADI_GPIO_PORT0),(ADI_GPIO_PIN_1));};break;
case 2:if(flag==1){
adi_gpio_SetHigh((ADI_GPIO_PORT0),(ADI_GPIO_PIN_2));}else{
adi_gpio_SetLow((ADI_GPIO_PORT0),(ADI_GPIO_PIN_2));};break;
case 3:if(flag==1){
adi_gpio_SetHigh((ADI_GPIO_PORT0),(ADI_GPIO_PIN_3));}else{
adi_gpio_SetLow((ADI_GPIO_PORT0),(ADI_GPIO_PIN_3));};break;
case 4:if(flag==1){
adi_gpio_SetHigh((ADI_GPIO_PORT0),(ADI_GPIO_PIN_4));}else{
adi_gpio_SetLow((ADI_GPIO_PORT0),(ADI_GPIO_PIN_4));};break;
case 5:if(flag==1){
adi_gpio_SetHigh((ADI_GPIO_PORT0),(ADI_GPIO_PIN_5));}else{
adi_gpio_SetLow((ADI_GPIO_PORT0),(ADI_GPIO_PIN_5));};break;
case 6:if(flag==1){
adi_gpio_SetHigh((ADI_GPIO_PORT0),(ADI_GPIO_PIN_6));}else{
adi_gpio_SetLow((ADI_GPIO_PORT0),(ADI_GPIO_PIN_6));};break;
case 7:if(flag==1){
adi_gpio_SetHigh((ADI_GPIO_PORT0),(ADI_GPIO_PIN_7));}else{
adi_gpio_SetLow((ADI_GPIO_PORT0),(ADI_GPIO_PIN_7));};break;
case 8:if(flag==1){
adi_gpio_SetHigh((ADI_GPIO_PORT0),(ADI_GPIO_PIN_8));}else{
adi_gpio_SetLow((ADI_GPIO_PORT0),(ADI_GPIO_PIN_8));};break;
case 9:if(flag==1){
adi_gpio_SetHigh((ADI_GPIO_PORT0),(ADI_GPIO_PIN_9));}else{
adi_gpio_SetLow((ADI_GPIO_PORT0),(ADI_GPIO_PIN_9));};break;
case 10:if(flag==1){
adi_gpio_SetHigh((ADI_GPIO_PORT0),(ADI_GPIO_PIN_10));}else{
adi_gpio_SetLow((ADI_GPIO_PORT0),(ADI_GPIO_PIN_10));};break;
case 11:if(flag==1){
adi_gpio_SetHigh((ADI_GPIO_PORT0),(ADI_GPIO_PIN_11));}else{
adi_gpio_SetLow((ADI_GPIO_PORT0),(ADI_GPIO_PIN_11));};break;
case 12:if(flag==1){
adi_gpio_SetHigh((ADI_GPIO_PORT0),(ADI_GPIO_PIN_12));}else{
adi_gpio_SetLow((ADI_GPIO_PORT0),(ADI_GPIO_PIN_12));};break;
case 13:if(flag==1){
adi_gpio_SetHigh((ADI_GPIO_PORT0),(ADI_GPIO_PIN_13));}else{
adi_gpio_SetLow((ADI_GPIO_PORT0),(ADI_GPIO_PIN_13));};break;
case 14:if(flag==1){
adi_gpio_SetHigh((ADI_GPIO_PORT0),(ADI_GPIO_PIN_14));}else{
adi_gpio_SetLow((ADI_GPIO_PORT0),(ADI_GPIO_PIN_14));};break;
case 15:if(flag==1){
adi_gpio_SetHigh((ADI_GPIO_PORT0),(ADI_GPIO_PIN_15));}else{
adi_gpio_SetLow((ADI_GPIO_PORT0),(ADI_GPIO_PIN_15));};break;
default:pin=0;break;
}
}break;
case 1:{
switch(pin)
{
case 0:if(flag==1){
adi_gpio_SetHigh((ADI_GPIO_PORT1),(ADI_GPIO_PIN_0));}else{
adi_gpio_SetLow((ADI_GPIO_PORT1),(ADI_GPIO_PIN_0));};break;
case 1:if(flag==1){
adi_gpio_SetHigh((ADI_GPIO_PORT1),(ADI_GPIO_PIN_1));}else{
adi_gpio_SetLow((ADI_GPIO_PORT1),(ADI_GPIO_PIN_1));};break;
case 2:if(flag==1){
adi_gpio_SetHigh((ADI_GPIO_PORT1),(ADI_GPIO_PIN_2));}else{
adi_gpio_SetLow((ADI_GPIO_PORT1),(ADI_GPIO_PIN_2));};break;
case 3:if(flag==1){
adi_gpio_SetHigh((ADI_GPIO_PORT1),(ADI_GPIO_PIN_3));}else{
adi_gpio_SetLow((ADI_GPIO_PORT1),(ADI_GPIO_PIN_3));};break;
case 4:if(flag==1){
adi_gpio_SetHigh((ADI_GPIO_PORT1),(ADI_GPIO_PIN_4));}else{
adi_gpio_SetLow((ADI_GPIO_PORT1),(ADI_GPIO_PIN_4));};break;
case 5:if(flag==1){
adi_gpio_SetHigh((ADI_GPIO_PORT1),(ADI_GPIO_PIN_5));}else{
adi_gpio_SetLow((ADI_GPIO_PORT1),(ADI_GPIO_PIN_5));};break;
case 6:if(flag==1){
adi_gpio_SetHigh((ADI_GPIO_PORT1),(ADI_GPIO_PIN_6));}else{
adi_gpio_SetLow((ADI_GPIO_PORT1),(ADI_GPIO_PIN_6));};break;
case 7:if(flag==1){
adi_gpio_SetHigh((ADI_GPIO_PORT1),(ADI_GPIO_PIN_7));}else{
adi_gpio_SetLow((ADI_GPIO_PORT1),(ADI_GPIO_PIN_7));};break;
case 8:if(flag==1){
adi_gpio_SetHigh((ADI_GPIO_PORT1),(ADI_GPIO_PIN_8));}else{
adi_gpio_SetLow((ADI_GPIO_PORT1),(ADI_GPIO_PIN_8));};break;
case 9:if(flag==1){
adi_gpio_SetHigh((ADI_GPIO_PORT1),(ADI_GPIO_PIN_9));}else{
adi_gpio_SetLow((ADI_GPIO_PORT1),(ADI_GPIO_PIN_9));};break;
case 10:if(flag==1){
adi_gpio_SetHigh((ADI_GPIO_PORT1),(ADI_GPIO_PIN_10));}else{
adi_gpio_SetLow((ADI_GPIO_PORT1),(ADI_GPIO_PIN_10));};break;
case 11:if(flag==1){
adi_gpio_SetHigh((ADI_GPIO_PORT1),(ADI_GPIO_PIN_11));}else{
adi_gpio_SetLow((ADI_GPIO_PORT1),(ADI_GPIO_PIN_11));};break;
case 12:if(flag==1){
adi_gpio_SetHigh((ADI_GPIO_PORT1),(ADI_GPIO_PIN_12));}else{
adi_gpio_SetLow((ADI_GPIO_PORT1),(ADI_GPIO_PIN_12));};break;
case 13:if(flag==1){
adi_gpio_SetHigh((ADI_GPIO_PORT1),(ADI_GPIO_PIN_13));}else{
adi_gpio_SetLow((ADI_GPIO_PORT1),(ADI_GPIO_PIN_13));};break;
case 14:if(flag==1){
adi_gpio_SetHigh((ADI_GPIO_PORT1),(ADI_GPIO_PIN_14));}else{
adi_gpio_SetLow((ADI_GPIO_PORT1),(ADI_GPIO_PIN_14));};break;
case 15:if(flag==1){
adi_gpio_SetHigh((ADI_GPIO_PORT1),(ADI_GPIO_PIN_15));}else{
adi_gpio_SetLow((ADI_GPIO_PORT1),(ADI_GPIO_PIN_15));};break;
default:pin=0;break;
}
}break;
case 2:{
switch(pin)
{
case 0:if(flag==1){
adi_gpio_SetHigh((ADI_GPIO_PORT2),(ADI_GPIO_PIN_0));}else{
adi_gpio_SetLow((ADI_GPIO_PORT2),(ADI_GPIO_PIN_0));};break;
case 1:if(flag==1){
adi_gpio_SetHigh((ADI_GPIO_PORT2),(ADI_GPIO_PIN_1));}else{
adi_gpio_SetLow((ADI_GPIO_PORT2),(ADI_GPIO_PIN_1));};break;
case 2:if(flag==1){
adi_gpio_SetHigh((ADI_GPIO_PORT2),(ADI_GPIO_PIN_2));}else{
adi_gpio_SetLow((ADI_GPIO_PORT2),(ADI_GPIO_PIN_2));};break;
case 3:if(flag==1){
adi_gpio_SetHigh((ADI_GPIO_PORT2),(ADI_GPIO_PIN_3));}else{
adi_gpio_SetLow((ADI_GPIO_PORT2),(ADI_GPIO_PIN_3));};break;
case 4:if(flag==1){
adi_gpio_SetHigh((ADI_GPIO_PORT2),(ADI_GPIO_PIN_4));}else{
adi_gpio_SetLow((ADI_GPIO_PORT2),(ADI_GPIO_PIN_4));};break;
case 5:if(flag==1){
adi_gpio_SetHigh((ADI_GPIO_PORT2),(ADI_GPIO_PIN_5));}else{
adi_gpio_SetLow((ADI_GPIO_PORT2),(ADI_GPIO_PIN_5));};break;
case 6:if(flag==1){
adi_gpio_SetHigh((ADI_GPIO_PORT2),(ADI_GPIO_PIN_6));}else{
adi_gpio_SetLow((ADI_GPIO_PORT2),(ADI_GPIO_PIN_6));};break;
case 7:if(flag==1){
adi_gpio_SetHigh((ADI_GPIO_PORT2),(ADI_GPIO_PIN_7));}else{
adi_gpio_SetLow((ADI_GPIO_PORT2),(ADI_GPIO_PIN_7));};break;
case 8:if(flag==1){
adi_gpio_SetHigh((ADI_GPIO_PORT2),(ADI_GPIO_PIN_8));}else{
adi_gpio_SetLow((ADI_GPIO_PORT2),(ADI_GPIO_PIN_8));};break;
case 9:if(flag==1){
adi_gpio_SetHigh((ADI_GPIO_PORT2),(ADI_GPIO_PIN_9));}else{
adi_gpio_SetLow((ADI_GPIO_PORT2),(ADI_GPIO_PIN_9));};break;
case 10:if(flag==1){
adi_gpio_SetHigh((ADI_GPIO_PORT2),(ADI_GPIO_PIN_10));}else{
adi_gpio_SetLow((ADI_GPIO_PORT2),(ADI_GPIO_PIN_10));};break;
case 11:if(flag==1){
adi_gpio_SetHigh((ADI_GPIO_PORT2),(ADI_GPIO_PIN_11));}else{
adi_gpio_SetLow((ADI_GPIO_PORT2),(ADI_GPIO_PIN_11));};break;
case 12:if(flag==1){
adi_gpio_SetHigh((ADI_GPIO_PORT2),(ADI_GPIO_PIN_12));}else{
adi_gpio_SetLow((ADI_GPIO_PORT2),(ADI_GPIO_PIN_12));};break;
case 13:if(flag==1){
adi_gpio_SetHigh((ADI_GPIO_PORT2),(ADI_GPIO_PIN_13));}else{
adi_gpio_SetLow((ADI_GPIO_PORT2),(ADI_GPIO_PIN_13));};break;
case 14:if(flag==1){
adi_gpio_SetHigh((ADI_GPIO_PORT2),(ADI_GPIO_PIN_14));}else{
adi_gpio_SetLow((ADI_GPIO_PORT2),(ADI_GPIO_PIN_14));};break;
case 15:if(flag==1){
adi_gpio_SetHigh((ADI_GPIO_PORT2),(ADI_GPIO_PIN_15));}else{
adi_gpio_SetLow((ADI_GPIO_PORT2),(ADI_GPIO_PIN_15));};break;
default:pin=0;break;
}
}break;
case 3:{
switch(pin)
{
case 0:if(flag==1){
adi_gpio_SetHigh((ADI_GPIO_PORT3),(ADI_GPIO_PIN_0));}else{
adi_gpio_SetLow((ADI_GPIO_PORT3),(ADI_GPIO_PIN_0));};break;
case 1:if(flag==1){
adi_gpio_SetHigh((ADI_GPIO_PORT3),(ADI_GPIO_PIN_1));}else{
adi_gpio_SetLow((ADI_GPIO_PORT3),(ADI_GPIO_PIN_1));};break;
case 2:if(flag==1){
adi_gpio_SetHigh((ADI_GPIO_PORT3),(ADI_GPIO_PIN_2));}else{
adi_gpio_SetLow((ADI_GPIO_PORT3),(ADI_GPIO_PIN_2));};break;
case 3:if(flag==1){
adi_gpio_SetHigh((ADI_GPIO_PORT3),(ADI_GPIO_PIN_3));}else{
adi_gpio_SetLow((ADI_GPIO_PORT3),(ADI_GPIO_PIN_3));};break;
case 4:if(flag==1){
adi_gpio_SetHigh((ADI_GPIO_PORT3),(ADI_GPIO_PIN_4));}else{
adi_gpio_SetLow((ADI_GPIO_PORT3),(ADI_GPIO_PIN_4));};break;
case 5:if(flag==1){
adi_gpio_SetHigh((ADI_GPIO_PORT3),(ADI_GPIO_PIN_5));}else{
adi_gpio_SetLow((ADI_GPIO_PORT3),(ADI_GPIO_PIN_5));};break;
case 6:if(flag==1){
adi_gpio_SetHigh((ADI_GPIO_PORT3),(ADI_GPIO_PIN_6));}else{
adi_gpio_SetLow((ADI_GPIO_PORT3),(ADI_GPIO_PIN_6));};break;
case 7:if(flag==1){
adi_gpio_SetHigh((ADI_GPIO_PORT3),(ADI_GPIO_PIN_7));}else{
adi_gpio_SetLow((ADI_GPIO_PORT3),(ADI_GPIO_PIN_7));};break;
case 8:if(flag==1){
adi_gpio_SetHigh((ADI_GPIO_PORT3),(ADI_GPIO_PIN_8));}else{
adi_gpio_SetLow((ADI_GPIO_PORT3),(ADI_GPIO_PIN_8));};break;
case 9:if(flag==1){
adi_gpio_SetHigh((ADI_GPIO_PORT3),(ADI_GPIO_PIN_9));}else{
adi_gpio_SetLow((ADI_GPIO_PORT3),(ADI_GPIO_PIN_9));};break;
case 10:if(flag==1){
adi_gpio_SetHigh((ADI_GPIO_PORT3),(ADI_GPIO_PIN_10));}else{
adi_gpio_SetLow((ADI_GPIO_PORT3),(ADI_GPIO_PIN_10));};break;
case 11:if(flag==1){
adi_gpio_SetHigh((ADI_GPIO_PORT3),(ADI_GPIO_PIN_11));}else{
adi_gpio_SetLow((ADI_GPIO_PORT3),(ADI_GPIO_PIN_11));};break;
case 12:if(flag==1){
adi_gpio_SetHigh((ADI_GPIO_PORT3),(ADI_GPIO_PIN_12));}else{
adi_gpio_SetLow((ADI_GPIO_PORT3),(ADI_GPIO_PIN_12));};break;
case 13:if(flag==1){
adi_gpio_SetHigh((ADI_GPIO_PORT3),(ADI_GPIO_PIN_13));}else{
adi_gpio_SetLow((ADI_GPIO_PORT3),(ADI_GPIO_PIN_13));};break;
case 14:if(flag==1){
adi_gpio_SetHigh((ADI_GPIO_PORT3),(ADI_GPIO_PIN_14));}else{
adi_gpio_SetLow((ADI_GPIO_PORT3),(ADI_GPIO_PIN_14));};break;
case 15:if(flag==1){
adi_gpio_SetHigh((ADI_GPIO_PORT3),(ADI_GPIO_PIN_15));}else{
adi_gpio_SetLow((ADI_GPIO_PORT3),(ADI_GPIO_PIN_15));};break;
default:pin=0;break;
}
}break;
default:port=0;break;
}
}
void GPIO_BUS_OUT(unsigned int port,unsigned int num) //num最大为0xffff
{
int i;
for(i=0;i<16;i++)
{
GPIO_OUT(port,i,(num>>i)&0x0001);
}
}
void P0_BUS_O(unsigned int num) //输入值num最大为0xFFFF
{
int i;
for(i=0;i<16;i++)
{
P0_O(i)=(num>>i)&0x0001;
}
}
unsigned int P0_BUS_I(void) //输出值num最大为0xFFFF
{
unsigned int num;
int i;
for(i=0;i<16;i++)
{
num=num+(P0_I(i)<<i)&0xFFFF;
}
return num;
}
void P1_BUS_O(unsigned int num) //输入值num最大为0xFFFF
{
int i;
for(i=0;i<16;i++)
{
P1_O(i)=(num>>i)&0x0001;
}
}
unsigned int P1_BUS_I(void) //输出值num最大为0xFFFF
{
unsigned int num;
int i;
for(i=0;i<16;i++)
{
num=num+(P1_I(i)<<i)&0xFFFF;
}
return num;
}
void P2_BUS_O(unsigned int num) //输入值num最大为0xFFFF
{
int i;
for(i=0;i<16;i++)
{
P2_O(i)=(num>>i)&0x0001;
}
}
unsigned int P2_BUS_I(void) //输出值num最大为0xFFFF
{
unsigned int num;
int i;
for(i=0;i<16;i++)
{
num=num+(P2_I(i)<<i)&0xFFFF;
}
return num;
}
void P3_BUS_O(unsigned int num) //输入值num最大为0xFFFF
{
int i;
for(i=0;i<16;i++)
{
P3_O(i)=(num>>i)&0x0001;
}
}
unsigned int P3_BUS_I(void) //输出值num最大为0xFFFF
{
unsigned int num;
int i;
for(i=0;i<16;i++)
{
num=num+(P3_I(i)<<i)&0xFFFF;
}
return num;
}
一、位带操作理论及实践
位带操作的概念其实30年前就有了，那还是 CM3 将此能力进化，这里的位带操作是 8051 位寻址区的威力大幅加强版
位带区： 支持位带操作的地址区
位带别名： 对别名地址的访问最终作 用到位带区的访问上（注意：这中途有一个 地址映射过程）
位带操作对于硬件 I/O 密集型的底层程序最有用处
支持了位带操作后，可以使用普通的加载/存储指令来对单一的比特进行读写。在CM4中，有两个区中实现了位带。其中一个是SRAM区的最低1MB范围，第二个则是片内外设区的最低1MB范围。这两个区中的地址除了可以像普通的RAM一样使用外，它们还都有自己的“位带别名区”，位带别名区把每个比特膨胀成一个32位的字。当你通过位带别名区访问这些字时，就可以达到访问原始比特的目的。
位操作就是可以单独的对一个比特位读和写，类似与51中sbit定义的变量，stm32中通过访问位带别名区来实现位操作的功能
STM32中有两个地方实现了位带，一个是SRAM，一个是片上外设。
（1）位带本质上是一块地址区（例如每一位地址位对应一个寄存器）映射到另一片地址区（实现每一位地址位对应一个寄存器中的一位），该区域就叫做位带别名区，将每一位膨胀成一个32位的字。
（2）位带区的4个字节对应实际寄存器或内存区的一个位，虽然变大到4个字节，但实际上只有最低位有效（代表0或1）
只有位带可以直接用=赋值的方式来操作寄存器 位带是把寄存器上的每一位 膨胀到32位 映射到位带区 比如0x4002 0000地址的第0个bit 映射到位带区的0地址 那么其对应的位带映射地址为0x00 - 0x04 一共32位 但只有LSB有效 采用位带的方式用=赋值时 就是把位带区对应的LSB赋值 然后MCU再转到寄存器对应的位里面 寄存器操作时 如果不改变其他位上面的值 那就只能通过&=或者|=的方式进行
要设置0x2000 0000这个字节的第二个位bit2为1,使用位带操作的步骤有：
1、将1写入位 带别名区对应的映射地址（即0x22000008,因为1bit对应4个byte）；
2、将0x2000 0000的值 读取到内部的缓冲区（这一步骤是内核完成的，属于原子操作，不需要用户操作）；
3、将bit2置1，再把值写 回到0x2000 0000(属于原子操作，不需要用户操作)。
关于GPIO引脚对应的访问地址，可以参考以下公式
寄存器位带别名 = 0x42000000 + (寄存器的地址-0x40000000)32 + 引脚编号4
如：端口F访问的起始地址GPIOF_BASE
#define GPIOF ((GPIO_TypeDef *)GPIOF_BASE)
但好在官方库里面都帮我们定义好了 只需要在BASE地址加上便宜即可
例如：
GPIOF的ODR寄存器的地址 = GPIOF_BASE + 0x14
寄存器位带别名 = 0x42000000 + (寄存器的地址-0x40000000)32 + 引脚编号4
设置PF9引脚的话：
uint32_t *PF9_BitBand =
*(uint32_t *)(0x42000000 + ((uint32_t )&GPIOF->ODR– 0x40000000) *32 + 9*4)
封装一下：
#define PFout(x) *(volatile uint32_t *)(0x42000000 + ((uint32_t )&GPIOF->ODR – 0x40000000) *32 + x*4)
现在 可以把通用部分封装成一个小定义：
#define BITBAND(addr, bitnum) ((addr & 0xF0000000)+0x2000000+((addr &0xFFFFF)<<5)+(bitnum<<2))
#define MEM_ADDR(addr) *((volatile unsigned long *)(addr))
#define BIT_ADDR(addr, bitnum) MEM_ADDR(BITBAND(addr, bitnum))
那么 设置PF引脚的函数可以定义：
#define GPIOF_ODR_Addr (GPIOF_BASE+20) //0x40021414
#define GPIOF_IDR_Addr (GPIOF_BASE+16) //0x40021410
#define PF_O(n) BIT_ADDR(GPIOF_ODR_Addr,n) //输出
#define PF_I(n) BIT_ADDR(GPIOF_IDR_Addr,n) //输入
若使PF9输入输出则：
PF_O(9)=1; //输出高电平
uint8_t dat = PF_I(9); //获取PF9引脚的值
总线输入输出：
void PF_BUS_O(unsigned int num) //输入值num最大为0xFFFF
{
int i;
for(i=0;i<16;i++)
{
PF_O(i)=(num>>i)&0x0001;
}
}
unsigned int PF_BUS_I(void) //输出值num最大为0xFFFF
{
unsigned int num;
int i;
for(i=0;i<16;i++)
{
num=num+(PF_I(i)<<i)&0xFFFF;
}
return num;
}
STM32的可用下面的函数：
#ifndef __GPIO_H__
#define __GPIO_H__
#include "stm32l496xx.h"
#define BITBAND(addr, bitnum) ((addr & 0xF0000000)+0x2000000+((addr &0xFFFFF)<<5)+(bitnum<<2))
#define MEM_ADDR(addr) *((volatile unsigned long *)(addr))
#define BIT_ADDR(addr, bitnum) MEM_ADDR(BITBAND(addr, bitnum))
#define GPIOA_ODR_Addr (GPIOA_BASE+20) //0x40020014
#define GPIOB_ODR_Addr (GPIOB_BASE+20) //0x40020414
#define GPIOC_ODR_Addr (GPIOC_BASE+20) //0x40020814
#define GPIOD_ODR_Addr (GPIOD_BASE+20) //0x40020C14
#define GPIOE_ODR_Addr (GPIOE_BASE+20) //0x40021014
#define GPIOF_ODR_Addr (GPIOF_BASE+20) //0x40021414
#define GPIOG_ODR_Addr (GPIOG_BASE+20) //0x40021814
#define GPIOH_ODR_Addr (GPIOH_BASE+20) //0x40021C14
#define GPIOI_ODR_Addr (GPIOI_BASE+20) //0x40022014
#define GPIOA_IDR_Addr (GPIOA_BASE+16) //0x40020010
#define GPIOB_IDR_Addr (GPIOB_BASE+16) //0x40020410
#define GPIOC_IDR_Addr (GPIOC_BASE+16) //0x40020810
#define GPIOD_IDR_Addr (GPIOD_BASE+16) //0x40020C10
#define GPIOE_IDR_Addr (GPIOE_BASE+16) //0x40021010
#define GPIOF_IDR_Addr (GPIOF_BASE+16) //0x40021410
#define GPIOG_IDR_Addr (GPIOG_BASE+16) //0x40021810
#define GPIOH_IDR_Addr (GPIOH_BASE+16) //0x40021C10
#define GPIOI_IDR_Addr (GPIOI_BASE+16) //0x40022010
#define PA_O(n) BIT_ADDR(GPIOA_ODR_Addr,n) //输出
#define PA_I(n) BIT_ADDR(GPIOA_IDR_Addr,n) //输入
#define PB_O(n) BIT_ADDR(GPIOB_ODR_Addr,n) //输出
#define PB_I(n) BIT_ADDR(GPIOB_IDR_Addr,n) //输入
#define PC_O(n) BIT_ADDR(GPIOC_ODR_Addr,n) //输出
#define PC_I(n) BIT_ADDR(GPIOC_IDR_Addr,n) //输入
#define PD_O(n) BIT_ADDR(GPIOD_ODR_Addr,n) //输出
#define PD_I(n) BIT_ADDR(GPIOD_IDR_Addr,n) //输入
#define PE_O(n) BIT_ADDR(GPIOE_ODR_Addr,n) //输出
#define PE_I(n) BIT_ADDR(GPIOE_IDR_Addr,n) //输入
#define PF_O(n) BIT_ADDR(GPIOF_ODR_Addr,n) //输出
#define PF_I(n) BIT_ADDR(GPIOF_IDR_Addr,n) //输入
#define PG_O(n) BIT_ADDR(GPIOG_ODR_Addr,n) //输出
#define PG_I(n) BIT_ADDR(GPIOG_IDR_Addr,n) //输入
#define PH_O(n) BIT_ADDR(GPIOH_ODR_Addr,n) //输出
#define PH_I(n) BIT_ADDR(GPIOH_IDR_Addr,n) //输入
#define PI_O(n) BIT_ADDR(GPIOI_ODR_Addr,n) //输出
#define PI_I(n) BIT_ADDR(GPIOI_IDR_Addr,n) //输入
void PA_BUS_O(unsigned int num);
unsigned int PA_BUS_I(void);
void PB_BUS_O(unsigned int num);
unsigned int PB_BUS_I(void);
void PC_BUS_O(unsigned int num);
unsigned int PC_BUS_I(void);
void PD_BUS_O(unsigned int num);
unsigned int PD_BUS_I(void);
void PE_BUS_O(unsigned int num);
unsigned int PE_BUS_I(void);
void PF_BUS_O(unsigned int num);
unsigned int PF_BUS_I(void);
void PG_BUS_O(unsigned int num);
unsigned int PG_BUS_I(void);
void PH_BUS_O(unsigned int num);
unsigned int PH_BUS_I(void);
void PI_BUS_O(unsigned int num);
unsigned int PI_BUS_I(void);
#endif
#include "GPIO.h"
void PA_BUS_O(unsigned int num) //输入值num最大为0xFFFF
{
int i;
for(i=0;i<16;i++)
{
PA_O(i)=(num>>i)&0x0001;
}
}
unsigned int PA_BUS_I(void) //输出值num最大为0xFFFF
{
unsigned int num;
int i;
for(i=0;i<16;i++)
{
num=num+(PA_I(i)<<i)&0xFFFF;
}
return num;
}
void PB_BUS_O(unsigned int num) //输入值num最大为0xFFFF
{
int i;
for(i=0;i<16;i++)
{
PB_O(i)=(num>>i)&0x0001;
}
}
unsigned int PB_BUS_I(void) //输出值num最大为0xFFFF
{
unsigned int num;
int i;
for(i=0;i<16;i++)
{
num=num+(PB_I(i)<<i)&0xFFFF;
}
return num;
}
void PC_BUS_O(unsigned int num) //输入值num最大为0xFFFF
{
int i;
for(i=0;i<16;i++)
{
PC_O(i)=(num>>i)&0x0001;
}
}
unsigned int PC_BUS_I(void) //输出值num最大为0xFFFF
{
unsigned int num;
int i;
for(i=0;i<16;i++)
{
num=num+(PC_I(i)<<i)&0xFFFF;
}
return num;
}
void PD_BUS_O(unsigned int num) //输入值num最大为0xFFFF
{
int i;
for(i=0;i<16;i++)
{
PD_O(i)=(num>>i)&0x0001;
}
}
unsigned int PD_BUS_I(void) //输出值num最大为0xFFFF
{
unsigned int num;
int i;
for(i=0;i<16;i++)
{
num=num+(PD_I(i)<<i)&0xFFFF;
}
return num;
}
void PE_BUS_O(unsigned int num) //输入值num最大为0xFFFF
{
int i;
for(i=0;i<16;i++)
{
PE_O(i)=(num>>i)&0x0001;
}
}
unsigned int PE_BUS_I(void) //输出值num最大为0xFFFF
{
unsigned int num;
int i;
for(i=0;i<16;i++)
{
num=num+(PE_I(i)<<i)&0xFFFF;
}
return num;
}
void PF_BUS_O(unsigned int num) //输入值num最大为0xFFFF
{
int i;
for(i=0;i<16;i++)
{
PF_O(i)=(num>>i)&0x0001;
}
}
unsigned int PF_BUS_I(void) //输出值num最大为0xFFFF
{
unsigned int num;
int i;
for(i=0;i<16;i++)
{
num=num+(PF_I(i)<<i)&0xFFFF;
}
return num;
}
void PG_BUS_O(unsigned int num) //输入值num最大为0xFFFF
{
int i;
for(i=0;i<16;i++)
{
PG_O(i)=(num>>i)&0x0001;
}
}
unsigned int PG_BUS_I(void) //输出值num最大为0xFFFF
{
unsigned int num;
int i;
for(i=0;i<16;i++)
{
num=num+(PG_I(i)<<i)&0xFFFF;
}
return num;
}
void PH_BUS_O(unsigned int num) //输入值num最大为0xFFFF
{
int i;
for(i=0;i<16;i++)
{
PH_O(i)=(num>>i)&0x0001;
}
}
unsigned int PH_BUS_I(void) //输出值num最大为0xFFFF
{
unsigned int num;
int i;
for(i=0;i<16;i++)
{
num=num+(PH_I(i)<<i)&0xFFFF;
}
return num;
}
void PI_BUS_O(unsigned int num) //输入值num最大为0xFFFF
{
int i;
for(i=0;i<16;i++)
{
PI_O(i)=(num>>i)&0x0001;
}
}
unsigned int PI_BUS_I(void) //输出值num最大为0xFFFF
{
unsigned int num;
int i;
for(i=0;i<16;i++)
{
num=num+(PI_I(i)<<i)&0xFFFF;
}
return num;
}
二、如何判断MCU的外设是否支持位带
根据《ARM Cortex-M3与Cortex-M4权威指南(第3版)》中第6章第7节描述
也就是说 要实现对GPIO的位带操作 必须保证GPIO位于外设区域的第一个1MB中
第一个1MB应该是0x4010 0000之前 位带不是直接操作地址 而是操作地址映射 地址映射被操作以后 MCU自动会修改对应寄存器的值
位带区只有1MB 所以只能改0x4000 0000 - 0x400F FFFF的寄存器
像F4系列 GPIO的首地址为0x4002 0000 就可以用位带来更改
STM32L476的GPIO就不行：
AHB2的都不能用位带
ABP 还有AHB1都可以用
但是L476的寄存器里面 GPIO和ADC都是AHB2