SPI控制X25043设置看么狗？求助原子哥

青玉更落星雨 · 发表于 2015-2-9 10:07:17

#define SPI_CS_LOW GPIO_ResetBits(GPIOA,GPIO_Pin_4) //CS ????
#define SPI_CS_HIGH GPIO_SetBits(GPIOA,GPIO_Pin_4) //CS ????
#define SPI_EEPROM_LOW GPIO_ResetBits(GPIOC,GPIO_Pin_3)
#define SPI_EEPROM_HIGH GPIO_SetBits(GPIOC,GPIO_Pin_3)

#define CMD_WRITE_DISABLE 0x04
#define CMD_WRITE_ENABLE 0x06
#define CMD_READ_STATE_REG 0x05
#define CMD_WRITE_STARE_REG 0x01

#define SET_1400ms_TIMER 0x00
#define SET_600ms_TIMER 0x10;
#define SET_200ms_TIMER 0x20;
#define SET_WDOG_DISABLE 0x30;

void SPI1_Init(void);
void SPI1_X25043_Init(void);
void SPI_X25043_Write_Enable(void);
void SPI_X25043_Write_SR(u8 sr);

void SPI1_Init(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
SPI_InitTypeDef SPI_InitStructure;

RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE );
RCC_APB2PeriphClockCmd(RCC_APB2Periph_SPI1, ENABLE );

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5 | GPIO_Pin_7;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_Init(GPIOA, &GPIO_InitStructure);

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4; //SPI CS
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_Init(GPIOA, &GPIO_InitStructure);

SPI_CS_LOW;

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_256;
SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;
SPI_InitStructure.SPI_CRCPolynomial = 7;
SPI_Init(SPI1, &SPI_InitStructure);

SPI_Cmd(SPI1, ENABLE);

}
void SPI1_X25043_Init()
{
SPI1_Init();
SPI_I2S_ClearFlag(SPI1,SPI_I2S_FLAG_TXE);
SPI_X25043_Write_Enable();
SPI_X25043_Write_SR(SET_1400ms_TIMER);
}

void SPI_X25043_Write_Enable(void)
{
SPI_CS_LOW;
SPI_I2S_SendData(SPI1, CMD_WRITE_ENABLE);
while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_TXE) == RESET);
SPI_CS_HIGH;
}

void SPI_X25043_Write_SR(u8 state)
{
SPI_CS_LOW;
SPI_I2S_SendData(SPI1, CMD_WRITE_STARE_REG);
while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_TXE) == RESET);
SPI_I2S_SendData(SPI1, state);
while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_TXE) == RESET);
SPI_CS_HIGH;
}