调通STM32F103RCT6 与W5500网卡芯片的PING程序
接到一个任务，验证硬件同事的一块板子上网卡芯片W5500的功能是否正常，MCU使用的是STM32F103RCT6 ，从了解到的信息看，W5500和MCU之间使用SPI接口进行通信，跟最近调了好久的DW1000的使用方法相同，驱动是厂家提供的，也就是只需要调通SPI通信，基本上就能驱动W5500工作！
标准库版本：STM32F10x_StdPeriph_Lib_V3.5.0
W5500与STM32F103RCT6 的引脚关系如下，使用的是STM32F103RCT6 芯片的SPI2：
PA8 -> W5500_RST PB12 -> W5500_SCS PB13 -> W5500_SCK PB14 -> W5500_MISO PB15 -> W5500_MOSI PA15 -> W5500_INT
关键的第一个点是GPIO的初始化（参考CSDN的文档实现）：
GPIO_InitTypeDef GPIO_InitStructure; SPI_InitTypeDef SPI_InitStructure; /*使能GPIOA的rcc时钟*/ RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE); RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE); RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE); RCC_APB1PeriphClockCmd(RCC_APB1Periph_SPI2, ENABLE); /*配置GPIO引脚*/ GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8 | GPIO_Pin_15| GPIO_Pin_3; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_Init(GPIOA, &GPIO_InitStructure); /* Configure SPI1 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); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_14; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU; GPIO_Init(GPIOB, &GPIO_InitStructure); /* Set Chip Select pin */ GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3 | 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); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8; 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_8);//RST /*配置GPIO引脚*/ GPIO_InitStructure.GPIO_Pin = GPIO_Pin_13; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; /*初始化GPIO*/ GPIO_Init(GPIOC, &GPIO_InitStructure); /* Set SPI interface */ 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_2; SPI_InitStructure.SPI_FirstBit=SPI_FirstBit_MSB; SPI_InitStructure.SPI_CRCPolynomial=7; SPI_Init(SPI2,&SPI_InitStructure); SPI_Cmd(SPI2,ENABLE); SPI_I2S_ClearFlag(SPI2, SPI_I2S_FLAG_TXE); SPI_I2S_ClearFlag(SPI2, SPI_I2S_FLAG_RXNE);
W5500的上电，根据W5500的驱动文档，需要把W5500的RST引脚拉低超过500us
void func_w5500_reset(void)
{
GPIO_ResetBits(W5500_RST_GPIO_PORT, W5500_RST_PIN);
delay_ms(2);
GPIO_SetBits(W5500_RST_GPIO_PORT, W5500_RST_PIN);
delay_ms(1600);
}SPI读写：
/* NSS pin is SW controllable */
#define port_SPIx_set_chip_select() GPIO_SetBits(W5500_SPI2_CS_GPIO_PORT, W5500_SPI2_CS_PIN)
#define port_SPIx_clear_chip_select() GPIO_ResetBits(W5500_SPI2_CS_GPIO_PORT, W5500_SPI2_CS_PIN)
uint8_t func_spi_write_a_byte(uint8_t byte)
{
//port_SPIx_set_chip_select();
/* Wait until TXE flag is set to send data */
while (SPI_I2S_GetFlagStatus(SPI2, SPI_I2S_FLAG_TXE) == RESET)
{
}
//SPI_I2S_SendData(SPI2, byte);
SPI2->DR = byte; /* set output to 0 (MOSI), this is necessary for
e.g. when waking up DW1000 from DEEPSLEEP via dwt_spicswakeup() function.
*/
/* Wait until RXNE flag is set to read data */
while (SPI_I2S_GetFlagStatus(SPI2, SPI_I2S_FLAG_RXNE) == RESET)
{
}
//return SPI_I2S_ReceiveData(SPI2);
uint8_t byte_read = SPI2->DR; //copy data read form (MISO)
//port_SPIx_clear_chip_select();
return byte_read;
}
void func_spi_cs_select(void)
{
port_SPIx_clear_chip_select();
}
void func_spi_cs_deselect(void)
{
port_SPIx_set_chip_select();
}测试程序
#include "SEGGER_RTT.h"
#define logD(...) SEGGER_RTT_printf(0, __VA_ARGS__)
int main(void)
{
reset_w5500();
config_eth();
uint8_t test_0 = 0;
uint8_t test_1 = 1;
while(1)
{
int i;
SEGGER_RTT_printf(0, "times:%d\r\n", times++);
test_eth();
delay_ms(500);
}
}
typedef uint8_t uint8;
static uint8 test_ip[8] = {'\0'};
static char print_str[1024] = "\0";
void test_eth(){
int index = 0;
memset(test_ip, 0x00, 8);
memset(print_str, 0x00, 1024);
getGAR(test_ip);
index = 0;
for(int i=0; i<4; i++){
sprintf(print_str + index, "%d.", test_ip[i]);
index = strlen(print_str);
}
logD("gateway:%s\r\n", print_str);
memset(test_ip, 0x00, 8);
memset(print_str, 0x00, 1024);
getSIPR(test_ip);
index = 0;
for(int i=0; i<4; i++){
sprintf(print_str + index, "%d.", test_ip[i]);
index = strlen(print_str);
}
logD("ip:%s\r\n", print_str);
}
void config_eth(){
uint8 mac[6]={0, };
uint8 lip[4]={192,168,86,197};
uint8 sub[4]={255,255,255,0};
uint8 gw[4]={192,168,86,1};//根据网络所在的IP地址段和网关信息修改
char print_str[1024] = "\0";
memset(print_str, 0x00, 1024);
memset(mac, 0x00, 6);
getMacByLockCode(mac);
int index = 0;
for(int i=0; i<6; i++){
sprintf(print_str + index, "%d.", mac[i]);
index = strlen(print_str);
}
logD("mac:%s\r\n", print_str);
uint8 test_ip[8] = {'\0'};
memset(test_ip, 0x00, 8);
memset(print_str, 0x00, 1024);
getSIPR(test_ip);
index = 0;
for(int i=0; i<4; i++){
sprintf(print_str + index, "%d.", test_ip[i]);
index = strlen(print_str);
}
logD("old ip:%s\r\n", print_str);
setSHAR(mac);
memset(test_ip, 0x00, 8);
memset(print_str, 0x00, 1024);
getSHAR(test_ip);
index = 0;
for(int i=0; i<6; i++){
sprintf(print_str + index, "%d.", test_ip[i]);
index = strlen(print_str);
}
logD("new mac:%s\r\n", print_str);
setSUBR(sub);
setGAR(gw);
setSIPR(lip);
memset(test_ip, 0x00, 8);
memset(print_str, 0x00, 1024);
getGAR(test_ip);
index = 0;
for(int i=0; i<4; i++){
sprintf(print_str + index, "%d.", test_ip[i]);
index = strlen(print_str);
}
logD("gateway:%s\r\n", print_str);
memset(test_ip, 0x00, 8);
memset(print_str, 0x00, 1024);
getSIPR(test_ip);
index = 0;
for(int i=0; i<4; i++){
sprintf(print_str + index, "%d.", test_ip[i]);
index = strlen(print_str);
}
logD("ip:%s\r\n", print_str);
}使用参考连接中提供的下载iolibarary，修改了基本的方法后，调通了ping程序
遗留问题：
STM32 CubeMX生成基于Hal库的工程，在SPI口配置为输出时，拉低和拉高均不生效；
参考文档：
https://blog.csdn.net/aliuguangjin/article/details/104552552
https://download.csdn.net/download/aliuguangjin/12197757
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