STM32+W5500网络通信
板子：STM32F103C8
模块：W5500
移植系统：uc/OS-III
编译工具：Keil&STM32CubeMX
烧录工具：FlyMcu
文章目录
一、W5500&Demos
1. W5500以太网模块
Niren_W5500模块是一款基于WIZnet W5500芯片的以太网模块，是泥人电子继 Niren_W5100模块后设计的一块性能更好、性价比更高的以太网模块。模块集成硬件化TCP/IP协议:内部32K字节存储器作TX/RX
缓存:支持10/100Mbps的传输速率;支持8个独立端口同时运行;同时模块还支持3.3V或5V电源供电,5V供电时还可以输出3.3V电源,方便用户在不同的单片机系统中使用;模块与单片机系统的通讯方式是简单、方便的SPI通信。
| 排针标识 | 功能说明 | 接法 | 排针标识 | 功能说明 | |
|---|---|---|---|---|---|
| 3.3V | 3.3V电源输入引脚 | – | 5V | 5V电源输入引脚 | – |
| MISO | SPI主机输入从机输出引脚 | A6 | GND | 电源地引脚 | – |
| MOSI | SPI主机输出从机输入引脚 | A7 | RST | W5500硬件初始化引脚（低电平有效） | A15 |
| SCS | SPI SLAVE选择引脚（低电平有效） | A4 | INT | W5500中断引脚（低电平有效） | C4 |
| SCLK | SPI时钟引脚 | A5 | NC | 悬空 | – |
2. 厂家Demo测试
资料地址：
链接：https://pan.baidu.com/s/1fiWWfmWQT9CNh4EimU-Igw
提取码：1234
具体例程的调试过程请参考压缩包中NiRen_W5500模块用户手册(用Adobe Reader打开)
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客户端：
服务器端：
UDP：
二、STM32+W5500+modbus协议编程
1. 工程文件下载地址
2. 源码演示
核心部分：
main.c
int main(void)
{
unsigned char i;
/* Initialize STM32F103 */
System_Initialization();//系统配置
SysTick_Init();//启动系统滴答定时器 SysTick
/* Config W5500 */
W5500_Configuration();//W5500配置
Delay_ms(200);//延时等待
/* Modbus-TCP Init */
eMBTCPInit(MB_TCP_PORT_USE_DEFAULT); //端口依赖事件模块初始化
Delay_ms(200); //延时等待
/* Enable Modbus-TCP Stack */
eMBEnable();//激活协议栈
printf("\r\nModbus-TCP Start!\r\n");
printf("IP:192.168.1.128\r\n");
while(1)
{
i=Read_SOCK_1_Byte(0,Sn_SR); //读W5500状态
if(i==0)
{
do
{
Delay_ms(100);//延时等待
}while(Socket_Listen(0)==FALSE);//设置“Socket n”为“TCP服务器模式”
}
else if(i==SOCK_ESTABLISHED) //建立TCP连接
{
eMBPoll();//启动modbus侦听
BSP_LED();//线圈控制LED灯
}
}
}
W5500的配置函数
/* W5500 configuration */
void W5500_Configuration()
{
unsigned char array[6];
GPIO_SetBits(GPIO_W5500_RST_PORT, GPIO_W5500_RST_Pin);//上拉
Delay_ms(100); /*delay 100ms 使用systick 1ms时基的延时*/
//等待以太网链路
while((Read_1_Byte(PHYCFGR)&LINK)==0); /* Waiting for Ethernet Link */
Write_1_Byte(MR, RST);//写入W5500普通寄存器一个字节
Delay_ms(20); /*delay 20ms */
/* Set Gateway IP as: 192.168.1.1 */
array[0]=192;
array[1]=168;
array[2]=1;
array[3]=1;
Write_Bytes(GAR, array, 4);//设置网关IP
/* Set Subnet Mask as: 255.255.255.0 */
array[0]=255;
array[1]=255;
array[2]=255;
array[3]=0;
Write_Bytes(SUBR, array, 4);//设置子网掩码
/* Set MAC Address as: 0x48,0x53,0x00,0x57,0x55,0x00 */
array[0]=0x48;
array[1]=0x53;
array[2]=0x00;
array[3]=0x57;
array[4]=0x55;
array[5]=0x00;
Write_Bytes(SHAR, array, 6);//设置MAC地址
/* Set W5500 IP as: 192.168.1.128 */
array[0]=192;
array[1]=168;
array[2]=1;
array[3]=128;
Write_Bytes(SIPR, array, 4);//设置W5500的IP地址
}
三、STM32+W5500的web服务
1. 项目下载：
https://github.com/Wattson1128/Embedded-System/tree/main/week15-W5500/HTTP_Server-Two_Page
2. 源码演示：
核心代码：
main.c:
int main(void)
{
Systick_Init(72);//系统时钟初始化
GPIO_Configuration(); //GPIO configuration
USART1_Init(); //串口初始化：115200@8-n-1
printf("W5500 EVB initialization over.\r\n");
Reset_W5500();
WIZ_SPI_Init();//W5500相关引脚配置
printf("W5500 initialized!\r\n");
if(GPIO_ReadInputDataBit(GPIOB,GPIO_Pin_7))
{
DefaultSet();//出厂值
}
else
{
get_config();//read config data from flash
}
printf("Firmware ver%d.%d\r\n",ConfigMsg.sw_ver[0],ConfigMsg.sw_ver[1]);
if(ConfigMsg.debug==0) ConfigMsg.debug=1;
set_network();//配置网络信息
printf("Network is ready.\r\n");
while(1)
{
if(ConfigMsg.JTXD_Control == 0)
do_http();//开启http服务
else
JTXD_do_http();
if(reboot_flag)
NVIC_SystemReset();//发起系统复位请求复位单片机
// reboot();
}
}
GPIO.C
void GPIO_Configuration(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA |RCC_APB2Periph_GPIOB |RCC_APB2Periph_GPIOC|RCC_APB2Periph_AFIO , ENABLE);
// Port A output
GPIO_InitStructure.GPIO_Pin =GPIO_Pin_0|GPIO_Pin_1| GPIO_Pin_2 |GPIO_Pin_3;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_Init(GPIOA, &GPIO_InitStructure);
// GPIO_ResetBits(GPIOA, GPIO_Pin_0);
// GPIO_ResetBits(GPIOA, GPIO_Pin_1);
// GPIO_SetBits(GPIOA, GPIO_Pin_2); // led off
// GPIO_SetBits(GPIOA, GPIO_Pin_3); // led off
// Port B output;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_Init(GPIOB, &GPIO_InitStructure);
GPIO_SetBits(GPIOB, GPIO_Pin_9);
// Port C input
// GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6;
// GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
// GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
// GPIO_Init(GPIOC, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_7;//控制flash
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
GPIO_Init(GPIOB, &GPIO_InitStructure);
GPIO_SetBits(GPIOB, GPIO_Pin_7);
}
W5500配置：
void WIZ_SPI_Init(void)
{
SPI_InitTypeDef SPI_InitStructure;
GPIO_InitTypeDef GPIO_InitStructure;
RCC_APB1PeriphClockCmd(RCC_APB1Periph_SPI2, ENABLE);
RCC_APB2PeriphClockCmd( RCC_APB2Periph_GPIOB |RCC_APB2Periph_AFIO , ENABLE);
// Port B output
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_Init(GPIOB, &GPIO_InitStructure);
GPIO_SetBits(GPIOB, GPIO_Pin_12);
/* Configure SPIy pins: SCK, MISO and MOSI */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_13| GPIO_Pin_14| GPIO_Pin_15;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_Init(GPIOB, &GPIO_InitStructure);
/* SPI Config -------------------------------------------------------------*/
SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex;
SPI_InitStructure.SPI_Mode = SPI_Mode_Master;
SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b;
SPI_InitStructure.SPI_CPOL = SPI_CPOL_Low;
SPI_InitStructure.SPI_CPHA = SPI_CPHA_1Edge;
SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;
SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_4;
SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;
SPI_InitStructure.SPI_CRCPolynomial = 7;
SPI_Init(SPI2, &SPI_InitStructure);
SPI_Cmd(SPI2, ENABLE);
}
http请求：
void do_http(void)
{
uint8 ch=SOCK_HTTP;
uint16 len;
st_http_request *http_request;
memset(rx_buf,0x00,MAX_URI_SIZE);
http_request = (st_http_request*)rx_buf; // struct of http request
/* http service start */
switch(getSn_SR(ch))
{
case SOCK_INIT:
listen(ch);
break;
case SOCK_LISTEN:
break;
case SOCK_ESTABLISHED:
//case SOCK_CLOSE_WAIT:
if(getSn_IR(ch) & Sn_IR_CON)
{
setSn_IR(ch, Sn_IR_CON);
}
if ((len = getSn_RX_RSR(ch)) > 0)
{
len = recv(ch, (uint8*)http_request, len);
*(((uint8*)http_request)+len) = 0;
proc_http(ch, (uint8*)http_request); // request is processed
disconnect(ch);
}
break;
case SOCK_CLOSE_WAIT:
if ((len = getSn_RX_RSR(ch)) > 0)
{
//printf("close wait: %d\r\n",len);
len = recv(ch, (uint8*)http_request, len);
*(((uint8*)http_request)+len) = 0;
proc_http(ch, (uint8*)http_request); // request is processed
}
disconnect(ch);
break;
case SOCK_CLOSED:
socket(ch, Sn_MR_TCP, 80, 0x00); /* reinitialize the socket */
break;
default:
break;
}// end of switch
}
void JTXD_do_http(void)
{
uint8 ch=SOCK_HTTP;
uint16 len;
st_http_request *http_request;
memset(rx_buf,0x00,MAX_URI_SIZE);
http_request = (st_http_request*)rx_buf; // struct of http request
/* http service start */
switch(getSn_SR(ch))
{
case SOCK_INIT:
listen(ch);
break;
case SOCK_LISTEN:
break;
case SOCK_ESTABLISHED:
//case SOCK_CLOSE_WAIT:
if(getSn_IR(ch) & Sn_IR_CON)
{
setSn_IR(ch, Sn_IR_CON);
}
if ((len = getSn_RX_RSR(ch)) > 0)
{
len = recv(ch, (uint8*)http_request, len);
*(((uint8*)http_request)+len) = 0;
JTXD_proc_http(ch, (uint8*)http_request); // request is processed
disconnect(ch);
}
break;
case SOCK_CLOSE_WAIT:
if ((len = getSn_RX_RSR(ch)) > 0)
{
//printf("close wait: %d\r\n",len);
len = recv(ch, (uint8*)http_request, len);
*(((uint8*)http_request)+len) = 0;
JTXD_proc_http(ch, (uint8*)http_request); // request is processed
}
disconnect(ch);
break;
case SOCK_CLOSED:
socket(ch, Sn_MR_TCP, 80, 0x00); /* reinitialize the socket */
break;
default:
break;
}// end of switch
}
四、总结
w5500通过对PB7引脚的操作来实现缺省值和flash之间的切换。
五、参考文章
天才精英2020: STM32+W5500+Freemodbus Modbus-TCP协议功能实现，工程文件下载
天才精英2020: 基于STM32_DM9000_UIP_FreeModbus的Modbus-TCP功能实现工程下载