请教各位，我用PC10 --CLK,PC11 --MISO,PC12 MOSI，来初始化SPI3接口，另一端是DS26518的芯片，但是怎么也无法读出芯片的Device ID，代码如下，有大神给指点一下吗？
//定义GPIO管脚来通过SPI 初始化E1芯片
#define GPIO_SPI_E1_PORT1 GPIOC //pins,10,11,12,5,6,7,8,9,4
#define GPIO_SPI_E1_PORT2 GPIOD //pins 0,1
#define GPIO_SPI_E1_PORT3 GPIOA //pins 4
#define E26518_SPI_SCLK GPIO_Pin_10
#define E26518_SPI_MISO GPIO_Pin_11
#define E26518_SPI_MOSI GPIO_Pin_12
#define E26518_SPI_SWAP GPIO_Pin_4
#define E1_SEL1 GPIO_Pin_4
#define E1_SEL2 GPIO_Pin_5
#define E1_SEL3 GPIO_Pin_6
#define E1_SEL4 GPIO_Pin_7
#define E1_SEL5 GPIO_Pin_8
#define E1_SEL6 GPIO_Pin_9
#define E1_SEL7 GPIO_Pin_0
#define E1_SEL8 GPIO_Pin_1
//CLK define ...
#define SPI_E26518_SPI_CLK RCC_APB1Periph_SPI3
#define SPI_E26518_SPI_SCLK_GPIO_CLK RCC_APB2Periph_GPIOC
#define SPI_E26518_SPI_MISO_GPIO_CLK RCC_APB2Periph_GPIOC
#define SPI_E26518_SPI_MOSI_GPIO_CLK RCC_APB2Periph_GPIOC
#define SPI_E26518_SPI_SEL1_GPIO_CLK RCC_APB2Periph_GPIOA
#define SPI_E26518_SPI_SEL2_GPIO_CLK RCC_APB2Periph_GPIOC
#define SPI_E26518_SPI_SEL3_GPIO_CLK RCC_APB2Periph_GPIOC
#define SPI_E26518_SPI_SEL4_GPIO_CLK RCC_APB2Periph_GPIOC
#define SPI_E26518_SPI_SEL5_GPIO_CLK RCC_APB2Periph_GPIOC
#define SPI_E26518_SPI_SEL6_GPIO_CLK RCC_APB2Periph_GPIOC
#define SPI_E26518_SPI_SEL7_GPIO_CLK RCC_APB2Periph_GPIOD
#define SPI_E26518_SPI_SEL8_GPIO_CLK RCC_APB2Periph_GPIOD
//POLL TYPE AND POLL MODE DEFINE...
//poll type...
#define POLL_SEL1 0x00
#define POLL_SEL2 0x01
#define POLL_SEL3 0x02
#define POLL_SEL4 0x03
#define POLL_SEL5 0x04
#define POLL_SEL6 0x05
#define POLL_SEL7 0x06
#define POLL_SEL8 0x07
#define POLL_ALL 0XFF
//poll mode...
#define POLL_LOW 0
#define POLL_HIGH 1
void SPI_E26518_Poll_Action(u8 poll_type,u8 poll_mode)
{
if (POLL_LOW == poll_mode)
{//拉低操作...
switch(poll_type)
{
case POLL_SEL1:
GPIO_ResetBits(GPIO_SPI_E1_PORT3, E1_SEL1);
break;
case POLL_SEL2:
GPIO_ResetBits(GPIO_SPI_E1_PORT1, E1_SEL2);
break;
case POLL_SEL3:
GPIO_ResetBits(GPIO_SPI_E1_PORT1, E1_SEL3);
break;
case POLL_SEL4:
GPIO_ResetBits(GPIO_SPI_E1_PORT1, E1_SEL4);
break;
case POLL_SEL5:
GPIO_ResetBits(GPIO_SPI_E1_PORT1, E1_SEL5);
break;
case POLL_SEL6:
GPIO_ResetBits(GPIO_SPI_E1_PORT1, E1_SEL6);
break;
case POLL_SEL7:
GPIO_ResetBits(GPIO_SPI_E1_PORT2, E1_SEL7);
break;
case POLL_SEL8:
GPIO_ResetBits(GPIO_SPI_E1_PORT2, E1_SEL8);
break;
case POLL_ALL:
GPIO_ResetBits(GPIO_SPI_E1_PORT3, E1_SEL1);
GPIO_ResetBits(GPIO_SPI_E1_PORT1, E1_SEL2);
GPIO_ResetBits(GPIO_SPI_E1_PORT1, E1_SEL3);
GPIO_ResetBits(GPIO_SPI_E1_PORT1, E1_SEL4);
GPIO_ResetBits(GPIO_SPI_E1_PORT1, E1_SEL5);
GPIO_ResetBits(GPIO_SPI_E1_PORT1, E1_SEL6);
GPIO_ResetBits(GPIO_SPI_E1_PORT2, E1_SEL7);
GPIO_ResetBits(GPIO_SPI_E1_PORT2, E1_SEL8);
printf("herer\r\n");
break;
default:
//出错了...
break;
}
}
else if (POLL_HIGH == poll_mode)
{ //拉高操作...
switch(poll_type)
{
case POLL_SEL1:
GPIO_SetBits(GPIO_SPI_E1_PORT3, E1_SEL1);
break;
case POLL_SEL2:
GPIO_SetBits(GPIO_SPI_E1_PORT1, E1_SEL2);
break;
case POLL_SEL3:
GPIO_SetBits(GPIO_SPI_E1_PORT1, E1_SEL3);
break;
case POLL_SEL4:
GPIO_SetBits(GPIO_SPI_E1_PORT1, E1_SEL4);
break;
case POLL_SEL5:
GPIO_SetBits(GPIO_SPI_E1_PORT1, E1_SEL5);
break;
case POLL_SEL6:
GPIO_SetBits(GPIO_SPI_E1_PORT1, E1_SEL6);
break;
case POLL_SEL7:
GPIO_SetBits(GPIO_SPI_E1_PORT2, E1_SEL7);
break;
case POLL_SEL8:
GPIO_SetBits(GPIO_SPI_E1_PORT2, E1_SEL8);
break;
case POLL_ALL:
GPIO_SetBits(GPIO_SPI_E1_PORT3, E1_SEL1);
GPIO_SetBits(GPIO_SPI_E1_PORT1, E1_SEL2);
GPIO_SetBits(GPIO_SPI_E1_PORT1, E1_SEL3);
GPIO_SetBits(GPIO_SPI_E1_PORT1, E1_SEL4);
GPIO_SetBits(GPIO_SPI_E1_PORT1, E1_SEL5);
GPIO_SetBits(GPIO_SPI_E1_PORT1, E1_SEL6);
GPIO_SetBits(GPIO_SPI_E1_PORT2, E1_SEL7);
GPIO_SetBits(GPIO_SPI_E1_PORT2, E1_SEL8);
break;
default:
//出错了...
break;
}
}
else
{
//出错了
}
return;
}
/*******************************************************************************
* Function Name : E1_SPI_IF_INIT
* Description : init E1 chip by SPI interface,this function init the SPI interface
* Input : None
* Output : None
* Return : None
*******************************************************************************/
void E1_SPI_IF_init(void)
{
SPI_InitTypeDef SPI_InitStructure;
GPIO_InitTypeDef GPIO_InitStructure;
/* Disable E1_SEL 2, 3, 4, 5, 6 */
GPIO_InitStructure.GPIO_Pin = E1_SEL2|E1_SEL3|E1_SEL4|E1_SEL5|E1_SEL6;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_Init(GPIO_SPI_E1_PORT1, &GPIO_InitStructure);
GPIO_SetBits(GPIO_SPI_E1_PORT1, E1_SEL2|E1_SEL3|E1_SEL4|E1_SEL5|E1_SEL6); //通过设置BSRR寄存器
/* Disable E1_SEL 1 */
GPIO_InitStructure.GPIO_Pin = E1_SEL1;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_Init(GPIO_SPI_E1_PORT3, &GPIO_InitStructure);
GPIO_SetBits(GPIO_SPI_E1_PORT3, E1_SEL1); //通过设置BSRR寄存器
/* Disable E1_SEL 7, 8*/
GPIO_InitStructure.GPIO_Pin = E1_SEL7|E1_SEL8;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_Init(GPIO_SPI_E1_PORT2, &GPIO_InitStructure);
GPIO_SetBits(GPIO_SPI_E1_PORT2, E1_SEL7|E1_SEL8); //通过设置BSRR寄存器
/* Enable SPI3 and GPIO clocks */
/*!< SPI_FLASH_SPI_CS_GPIO, SPI_FLASH_SPI_MOSI_GPIO,
SPI_FLASH_SPI_MISO_GPIO, SPI_FLASH_SPI_DETECT_GPIO
and SPI_FLASH_SPI_SCK_GPIO Periph clock enable */
RCC_APB2PeriphClockCmd(SPI_E26518_SPI_SCLK_GPIO_CLK|RCC_APB2Periph_GPIOA|
RCC_APB2Periph_GPIOD|RCC_APB2Periph_AFIO , ENABLE); //设置APB2ENR寄存器对应位,使能GPIO port C 时钟
/*!< AFIO Periph clock enable */
RCC_APB1PeriphClockCmd(SPI_E26518_SPI_CLK,ENABLE); //SPI3在APB1总线上,使能 SPI3 的时钟
/*!< Remap SPI3 Pins */
GPIO_PinRemapConfig(GPIO_Remap_SPI3,ENABLE);
/*!< Configure SPI_FLASH_SPI pins: SCK */
GPIO_InitStructure.GPIO_Pin = E26518_SPI_SCLK;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;//复用推挽模式
GPIO_Init(GPIO_SPI_E1_PORT1, &GPIO_InitStructure);//初始化SPI，涉及GPIO的CRL\BRR\BSRR寄存器
/*!< Configure SPI_FLASH_SPI pins: MISO */
GPIO_InitStructure.GPIO_Pin = E26518_SPI_MISO;
GPIO_Init(GPIO_SPI_E1_PORT1, &GPIO_InitStructure);
/*!< Configure SPI_FLASH_SPI pins: MOSI */
GPIO_InitStructure.GPIO_Pin = E26518_SPI_MOSI;
GPIO_Init(GPIO_SPI_E1_PORT1, &GPIO_InitStructure);
/* Deselect the FLASH: Chip Select high */
SPI_E26518_Poll_Action(POLL_ALL,POLL_HIGH);
/* SPI1 configuration */
// W25X16: data input on the DIO pin is sampled on the rising edge of the CLK.
// Data on the DO and DIO pins are clocked out on the falling edge of CLK.
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_4;
SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_LSB;
SPI_InitStructure.SPI_CRCPolynomial = 7;
SPI_Init(SPI3, &SPI_InitStructure); //主要通过设置CR1/I2SCFGR/CRCPR寄存器
/* Enable SPI1 */
SPI_Cmd(SPI3, ENABLE);//spi使能，主要通过设置CR1寄存器
}
/*******************************************************************************
* Function Name : spi read/write base byte
* Description : read/write one byte through spi interface...
* Input : None
* Output : None
* Return : None
*******************************************************************************/
//read byte through spi
unsigned char readByte_SPIex1(void) {
unsigned char cBYTE,i;
while (SPI_I2S_GetFlagStatus(SPI3, SPI_I2S_FLAG_RXNE) == RESET);
/* Return the byte read from the SPI bus */
return SPI_I2S_ReceiveData(SPI3);
}
//write a byte...
void writeByte_SPIex1( unsigned char cBYTE) {
/* Loop while DR register in not emplty */
while (SPI_I2S_GetFlagStatus(SPI3, SPI_I2S_FLAG_TXE) == RESET);
/* Send byte through the SPI3 peripheral */
SPI_I2S_SendData(SPI3, cBYTE);
}
/*******************************************************************************
* Function Name : write value to register of e1
* Description : spi write a 2byte address to e1 chip and read one or two byte...
* Input : None
* Output : None
* Return : None
*******************************************************************************/
void write_value(u16 addr,u8 value)
{
u8 SendByte = 0;
u16 tmp_addr =addr<<1;
SendByte = (tmp_addr>>8)&0x7f;
//send first 8bit of addr domain,and the 8th bit must be zero
writeByte_SPIex1(SendByte);
//the second 8bit of addr domain
SendByte = tmp_addr&0xff;
writeByte_SPIex1(SendByte);
//send value of resgister
SPI_E1_SendByte(value);
return;
}
/*******************************************************************************
* Function Name : read one address value from register of e1
* Description : spi write a 2byte address to e1 chip and read one or two byte...
* Input : None
* Output : None
* Return : None
*******************************************************************************/
u8 Read_Value(u16 addr)
{
u8 SendByte = 0;
SendByte = (addr>>7)|0x80;//读时，地址的最高位置1
writeByte_SPIex1(SendByte);
SendByte = (addr&0xff)<<1;
writeByte_SPIex1(SendByte);
SendByte = readByte_SPIex1();
return SendByte;
}
void Read_Device_ID()
{
int i = 0;
int j=0 ,k=0;
u8 Device_ID = 0;
//读Device ID operator
for (i = 0;i< 8 ;i++)
{
SPI_E26518_Poll_Action(i,POLL_LOW);
Device_ID = Read_Value(0x00f8);
printf("\r\n i = %d,Device_ID=%02x",i,Device_ID);
SPI_E26518_Poll_Action(i,POLL_HIGH);
for(j = 0;j<1000;j++)k=j;//sleep a timer...
}
return;
}
大神给把把脉吧，不圣感谢。！！！！！！！！！！！！！！！！！！！！！！！！
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