#define spiPortOfEEPROM
/*******************************************************************************
函式功能： 初始化EEPROM
輸 入： 無
輸 出： 無
返 回 值： 無
備 注： 無
*******************************************************************************/
void InitEEPROM(void)
{
//MX25L-CS，初始化片選 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);
//初始化對應spi
SPI_Configuration(spiPortOfEEPROM);
}
/*******************************************************************************
* Function Name : SPI_Configuration
* Description : SPI模塊初始化，【包括相關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:
//啟動SPI1時鐘
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE);//使能GPIOB,GPIOC時鐘
RCC_APB2PeriphClockCmd(RCC_APB2Periph_SPI1, ENABLE);//使能SPI2時鐘
GPIO_PinAFConfig(GPIOA,GPIO_PinSource5,GPIO_AF_SPI1); //PA5復用為 SPI1
GPIO_PinAFConfig(GPIOA,GPIO_PinSource6,GPIO_AF_SPI1); //PA6復用為 SPI1
GPIO_PinAFConfig(GPIOA,GPIO_PinSource7,GPIO_AF_SPI1); //PA7復用為 SPI1
//////下面是SPI相關GPIO初始化//////
//Configure SPI1 pins: SCK, MISO and MOSI
//GPIOA5~7初始化設定
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5|GPIO_Pin_6|GPIO_Pin_7;//PA5~7復用功能輸出
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;//復用功能
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;//推挽輸出
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;//輸出
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;//推挽輸出
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);//啟動傳輸
break;
case 2:
//啟動SPI2時鐘
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOB, ENABLE);//使能GPIOB時鐘
RCC_APB1PeriphClockCmd(RCC_APB1Periph_SPI2, ENABLE);//使能SPI2時鐘
GPIO_PinAFConfig(GPIOB,GPIO_PinSource13,GPIO_AF_SPI2); //PB13復用為 SPI2
GPIO_PinAFConfig(GPIOB,GPIO_PinSource14,GPIO_AF_SPI2); //PC2復用為 SPI2
GPIO_PinAFConfig(GPIOB,GPIO_PinSource15,GPIO_AF_SPI2); //PC3復用為 SPI2
//////下面是SPI相關GPIO初始化//////
//Configure SPI2 pins: SCK, MISO and MOSI
//GPIOB13~15初始化設定
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_13|GPIO_Pin_14|GPIO_Pin_15;//PB13~15復用功能輸出
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;//復用功能
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;//推挽輸出
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;//輸出
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;//推挽輸出
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);//啟動傳輸
break;
case 3:
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA|RCC_AHB1Periph_GPIOB|RCC_AHB1Periph_GPIOC, ENABLE);//使能時鐘
RCC_APB1PeriphClockCmd(RCC_APB1Periph_SPI3, ENABLE);//使能SPI3時鐘
//////下面是SPI相關GPIO初始化//////
//Configure SPI1 pins: SCK, MISO and MOSI
//GPIOA5~7初始化設定
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5;//PA5~7復用功能輸出
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;//復用功能
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;//推挽輸出
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;//復用功能
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;//推挽輸出
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;//輸出
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;//推挽輸出
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;//100MHz
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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);
//這里只針對SPI口初始化
RCC_APB1PeriphResetCmd(RCC_APB1Periph_SPI3,ENABLE);//復位SPI1
RCC_APB1PeriphResetCmd(RCC_APB1Periph_SPI3,DISABLE);//停止復位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);//啟動傳輸
break;
}
}
/*******************************************************************************
* Function Name : SPI_ReadWriteByte
* Description : SPI讀寫一個位元組（發送完成后回傳本次通訊讀取的資料）
* Input : u8 TxData 待發送的數
* Output : None
* Return : u8 RxData 收到的數
*******************************************************************************/
unsigned char SPI_ReadWriteByte(unsigned char port,unsigned char TxData)
{
unsigned char RxData = 0;
unsigned short j=0;
switch(port)
{
case 1:
j=0; //等待發送緩沖區空
while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_TXE) == RESET)
{
if(j++>5000)break;
}
//發一個位元組
SPI_I2S_SendData(SPI1, TxData);
//等待資料接收
j=0;
while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_RXNE) == RESET)
{
if(j++>5000)break;
}
//取資料
RxData = SPI_I2S_ReceiveData(SPI1);
break;
case 2:
j=0; //等待發送緩沖區空
while(SPI_I2S_GetFlagStatus(SPI2, SPI_I2S_FLAG_TXE) == RESET)
{
if(j++>5000)break;
}
//發一個位元組
SPI_I2S_SendData(SPI2, TxData);
//等待資料接收
j=0;
while(SPI_I2S_GetFlagStatus(SPI2, SPI_I2S_FLAG_RXNE) == RESET)
{
if(j++>5000)break;
}
//取資料
RxData = SPI_I2S_ReceiveData(SPI2);
break;
case 3:
j=0; //等待發送緩沖區空
while(SPI_I2S_GetFlagStatus(SPI3, SPI_I2S_FLAG_TXE) == RESET)
{
if(j++>5000)break;
}
//發一個位元組
SPI_I2S_SendData(SPI2, TxData);
//等待資料接收
j=0;
while(SPI_I2S_GetFlagStatus(SPI3, SPI_I2S_FLAG_RXNE) == RESET)
{
if(j++>5000)break;
}
//取資料
RxData = SPI_I2S_ReceiveData(SPI3);
break;
default:
break;
}
return (unsigned char)RxData;
}
調了一天了，一點波形都沒有。無語中。。。
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