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本帖最后由 pjzmj2012 于 2021-5-27 15:08 编辑
#define spiPortOfEEPROM 3
/*******************************************************************************
函数功能： 初始化EEPROM
输 入： 无
输 出： 无
返 回 值： 无
备 注： 无
*******************************************************************************/
void InitEEPROM(void)
{
//MX25L-CS，初始化片选 PA4
GPIO_InitTypeDef GPIO_InitStructure;
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_15 ;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;//100MHz
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_DOWN;
GPIO_Init(GPIOA, &GPIO_InitStructure);
//初始化对应spi
SPI_Configuration(spiPortOfEEPROM);
}
/*******************************************************************************
* Function Name : SPI_Configuration
* Description : SPI模块初始化，【包括相关IO口的初始化】
* Input : None
* Output : None
* Return : None
*******************************************************************************/
void SPI_Configuration(unsigned char port)
{
GPIO_InitTypeDef GPIO_InitStructure;
SPI_InitTypeDef SPI_InitStructure;
switch(port)
{
case 1:
//启动SPI1时钟
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE);//使能GPIOB,GPIOC时钟
RCC_APB2PeriphClockCmd(RCC_APB2Periph_SPI1, ENABLE);//使能SPI2时钟
GPIO_PinAFConfig(GPIOA,GPIO_PinSource5,GPIO_AF_SPI1); //PA5复用为 SPI1
GPIO_PinAFConfig(GPIOA,GPIO_PinSource6,GPIO_AF_SPI1); //PA6复用为 SPI1
GPIO_PinAFConfig(GPIOA,GPIO_PinSource7,GPIO_AF_SPI1); //PA7复用为 SPI1
//////下面是SPI相关GPIO初始化//////
//Configure SPI1 pins: SCK, MISO and MOSI
//GPIOA5~7初始化设置
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5|GPIO_Pin_6|GPIO_Pin_7;//PA5~7复用功能输出
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;//复用功能
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;//推挽输出
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;//100MHz
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;//上拉
GPIO_Init(GPIOA, &GPIO_InitStructure);//初始化
//Configure PA4 pin: MX25L_CS pin
//GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12;//PA4
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4;//PA4
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;//输出
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;//推挽输出
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;//100MHz
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;//上拉
GPIO_Init(GPIOA, &GPIO_InitStructure);//初始化
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_High;
SPI_InitStructure.SPI_CPHA = SPI_CPHA_2Edge;
SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;
SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_256;
SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;
SPI_InitStructure.SPI_CRCPolynomial = 7;
SPI_Init(SPI1, &SPI_InitStructure);
SPI_Cmd(SPI1, ENABLE);
SPI_ReadWriteByte(1,0xff);//启动传输
break;
case 2:
//启动SPI2时钟
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOB, ENABLE);//使能GPIOB时钟
RCC_APB1PeriphClockCmd(RCC_APB1Periph_SPI2, ENABLE);//使能SPI2时钟
GPIO_PinAFConfig(GPIOB,GPIO_PinSource13,GPIO_AF_SPI2); //PB13复用为 SPI2
GPIO_PinAFConfig(GPIOB,GPIO_PinSource14,GPIO_AF_SPI2); //PC2复用为 SPI2
GPIO_PinAFConfig(GPIOB,GPIO_PinSource15,GPIO_AF_SPI2); //PC3复用为 SPI2
//////下面是SPI相关GPIO初始化//////
//Configure SPI2 pins: SCK, MISO and MOSI
//GPIOB13~15初始化设置
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_13|GPIO_Pin_14|GPIO_Pin_15;//PB13~15复用功能输出
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;//复用功能
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;//推挽输出
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;//100MHz
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;//上拉
GPIO_Init(GPIOB, &GPIO_InitStructure);//初始化
//Configure PB12 pin: SD_CS pin
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12;//PB12
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;//输出
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;//推挽输出
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;//100MHz
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;//上拉
GPIO_Init(GPIOB, &GPIO_InitStructure);//初始化
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_High;
SPI_InitStructure.SPI_CPHA = SPI_CPHA_2Edge;
SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;
SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_256;
SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;
SPI_InitStructure.SPI_CRCPolynomial = 7;
SPI_Init(SPI2, &SPI_InitStructure);
SPI_Cmd(SPI2, ENABLE);
SPI_ReadWriteByte(2,0xff);//启动传输
break;
case 3:
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA|RCC_AHB1Periph_GPIOB|RCC_AHB1Periph_GPIOC, ENABLE);//使能时钟
RCC_APB1PeriphClockCmd(RCC_APB1Periph_SPI3, ENABLE);//使能SPI3时钟
//////下面是SPI相关GPIO初始化//////
//Configure SPI1 pins: SCK, MISO and MOSI
//GPIOA5~7初始化设置
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5;//PA5~7复用功能输出
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;//复用功能
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;//推挽输出
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;//100MHz
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;//上拉
GPIO_Init(GPIOB, &GPIO_InitStructure);//初始化
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10|GPIO_Pin_11;//
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;//复用功能
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;//推挽输出
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;//100MHz
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;//上拉
GPIO_Init(GPIOC, &GPIO_InitStructure);//初始化
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_15;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;//输出
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;//推挽输出
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;//100MHz
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;//上拉
GPIO_Init(GPIOA, &GPIO_InitStructure);//初始化
GPIO_PinAFConfig(GPIOB,GPIO_PinSource5,GPIO_AF_SPI3);
GPIO_PinAFConfig(GPIOC,GPIO_PinSource10,GPIO_AF_SPI3);
GPIO_PinAFConfig(GPIOC,GPIO_PinSource11,GPIO_AF_SPI3);
//这里只针对SPI口初始化
RCC_APB1PeriphResetCmd(RCC_APB1Periph_SPI3,ENABLE);//复位SPI1
RCC_APB1PeriphResetCmd(RCC_APB1Periph_SPI3,DISABLE);//停止复位SPI1
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_High;
SPI_InitStructure.SPI_CPHA = SPI_CPHA_2Edge;
SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;
SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_256;
SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;
SPI_InitStructure.SPI_CRCPolynomial = 7;
SPI_Init(SPI3, &SPI_InitStructure);
SPI_Cmd(SPI3, ENABLE);
SPI_ReadWriteByte(3,0xAA);//启动传输
break;
}
}
/*******************************************************************************
* Function Name : SPI_ReadWriteByte
* Description : SPI读写一个字节（发送完成后返回本次通讯读取的数据）
* Input : u8 TxData 待发送的数
* Output : None
* Return : u8 RxData 收到的数
*******************************************************************************/
unsigned char SPI_ReadWriteByte(unsigned char port,unsigned char TxData)
{
unsigned char RxData = 0;
unsigned short j=0;
switch(port)
{
case 1:
j=0; //等待发送缓冲区空
while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_TXE) == RESET)
{
if(j++>5000)break;
}
//发一个字节
SPI_I2S_SendData(SPI1, TxData);
//等待数据接收
j=0;
while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_RXNE) == RESET)
{
if(j++>5000)break;
}
//取数据
RxData = SPI_I2S_ReceiveData(SPI1);
break;
case 2:
j=0; //等待发送缓冲区空
while(SPI_I2S_GetFlagStatus(SPI2, SPI_I2S_FLAG_TXE) == RESET)
{
if(j++>5000)break;
}
//发一个字节
SPI_I2S_SendData(SPI2, TxData);
//等待数据接收
j=0;
while(SPI_I2S_GetFlagStatus(SPI2, SPI_I2S_FLAG_RXNE) == RESET)
{
if(j++>5000)break;
}
//取数据
RxData = SPI_I2S_ReceiveData(SPI2);
break;
case 3:
j=0; //等待发送缓冲区空
while(SPI_I2S_GetFlagStatus(SPI3, SPI_I2S_FLAG_TXE) == RESET)
{
if(j++>5000)break;
}
//发一个字节
SPI_I2S_SendData(SPI2, TxData);
//等待数据接收
j=0;
while(SPI_I2S_GetFlagStatus(SPI3, SPI_I2S_FLAG_RXNE) == RESET)
{
if(j++>5000)break;
}
//取数据
RxData = SPI_I2S_ReceiveData(SPI3);
break;
default:
break;
}
return (unsigned char)RxData;
}
调了一天了，一点波形都没有。无语中。。。
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发表于 2021-5-26 17:11:04
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