#include "SPI_FPGA.h"
#include "delay.h"
#include "stm32f10x_spi.h"
#include "stm32f10x_dma.h"
u8 test_spi;
u8 spi_buf[4]="";
u16 DMA1_MEM_LEN;//保存DMA每次数据传送的长度
extern u32 g_frequency_data;
/****************************************************************************
* @Author： Zhang Zhenhua
* @Date: 2019-08-30
* @F_name: SPI_FPGA_Interface_Init
* @brief : 用于初始化spi1接口，用于与fpga通信
* @param : None
* @retval: None
* @note ： 1、fpga作为主机，主动往stm32发送传感器数据
2、stm32在spi中断中处理数据。
//SPI1_NSS PA4 pin39
//SPI1_SCK PA5 pin38
//SPI1_MISO PA6 pin34
//SPI1_MOSI PA7 pin33
*****************************************************************************/
void SPI_FPGA_Interface_Init(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
SPI_InitTypeDef SPI_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
DMA_InitTypeDef DMA_InitStructure;
RCC_APB2PeriphClockCmd( RCC_APB2Periph_GPIOA, ENABLE );
RCC_APB2PeriphClockCmd( RCC_APB2Periph_SPI1, ENABLE );
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1,ENABLE);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4 | GPIO_Pin_5|GPIO_Pin_6|GPIO_Pin_7;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; //复用推挽输出
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);
SPI_Cmd(SPI1, DISABLE);
SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex; //设置SPI单向或者双向的数据模式:SPI设置为双线双向全双工
SPI_InitStructure.SPI_Mode = SPI_Mode_Slave; //设置SPI工作模式:设置为从SPI
SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b; //设置SPI的数据大小:SPI发送接收8位帧结构
SPI_InitStructure.SPI_CPOL = SPI_CPOL_Low; //选择了串行时钟的稳态:时钟悬空高.....不知道为啥，在之前雕刻机板子上面，配置spi竟然选择的high。。竟然能用？？？？
SPI_InitStructure.SPI_CPHA = SPI_CPHA_2Edge; //数据捕获于第二个时钟沿
SPI_InitStructure.SPI_NSS = SPI_NSS_Soft; //NSS信号由硬件（NSS管脚）还是软件（使用SSI位）管理:内部NSS信号有SSI位控制
SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_256; //定义波特率预分频的值:波特率预分频值为256,,雕刻机上的就是2
SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_LSB; //指定数据传输从MSB位还是LSB位开始:数据传输从MSB位开始//////雕刻机上的是LSB，这里更改掉
// SPI_InitStructure.SPI_CRCPolynomial = 7; //CRC值计算的多项式
SPI_Init(SPI1, &SPI_InitStructure); //根据SPI_InitStruct中指定的参数初始化外设SPIx寄存器
//配置SPI的DMA
/* Enable the DMA Stream IRQ Channel */
NVIC_InitStructure.NVIC_IRQChannel = DMA1_Channel2_IRQn; //设置DMA中断
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
NVIC_InitStructure.NVIC_IRQChannel = SPI1_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
DMA_DeInit(DMA1_Channel2); //SPI1 DMA rx
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC; //数据传输方向，这里改成了从外设读取，存储到内存
DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)spi_buf;
DMA_InitStructure.DMA_PeripheralBaseAddr= ((uint32_t)SPI1 + 0x0C);//(uint32_t)(&(SPI_COM_PORT_NAME->DR));
DMA_InitStructure.DMA_BufferSize = 4;
DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable; //外设地址不递增
DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;//内存地址可以递增
DMA_InitStructure.DMA_PeripheralDataSize =DMA_PeripheralDataSize_Byte;//DMA_PeripheralDataSize_Word;
DMA_InitStructure.DMA_MemoryDataSize =DMA_PeripheralDataSize_Byte;// DMA_MemoryDataSize_Word;
DMA_InitStructure.DMA_Mode = DMA_Mode_Circular; //之前是normal模式，现在改了看看！！
DMA_InitStructure.DMA_Priority = DMA_Priority_VeryHigh; //DMA通道 x拥有中优先级
DMA_InitStructure.DMA_M2M = DMA_M2M_Disable; //DMA通道x没有设置为内存到内存传输
DMA_Init(DMA1_Channel2, &DMA_InitStructure);
SPI_I2S_DMACmd(SPI1,SPI_I2S_DMAReq_Rx,ENABLE);
SPI_I2S_ClearFlag(SPI1,SPI_I2S_FLAG_RXNE);
DMA_ITConfig(DMA1_Channel2, DMA_IT_TC, ENABLE);
DMA_Cmd(DMA1_Channel2, ENABLE);
//配置SPI的DMA
SPI_I2S_ITConfig(SPI1,SPI_I2S_IT_RXNE, ENABLE);//新状态依然是中断打开状态！！
SPI_Cmd(SPI1, ENABLE); //使能SPI外设
}
void DMA1_Channel2_IRQHandler(void)//貌似只有stm32F4才有数据流的概念，F1里面只有通道的概念
{
GPIO_SetBits(GPIOA,GPIO_Pin_4);
DMA_InitTypeDef DMA_InitStructure;
SERVO_ON=~SERVO_ON;//
DMA_DeInit(DMA1_Channel2);
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)spi_buf;
DMA_InitStructure.DMA_PeripheralBaseAddr= ((uint32_t)SPI1 + 0x0C);//(uint32_t)(&(SPI_COM_PORT_NAME->DR));
DMA_InitStructure.DMA_BufferSize = 4;
DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
DMA_InitStructure.DMA_PeripheralDataSize =DMA_PeripheralDataSize_Byte;//DMA_PeripheralDataSize_Word;
DMA_InitStructure.DMA_MemoryDataSize =DMA_PeripheralDataSize_Byte;// DMA_MemoryDataSize_Word;
DMA_InitStructure.DMA_Mode =DMA_Mode_Normal;
DMA_InitStructure.DMA_Priority = DMA_Priority_VeryHigh;
DMA_InitStructure.DMA_M2M = DMA_M2M_Disable; //DMA通道x没有设置为内存到内存传输
DMA_Init(DMA1_Channel2, &DMA_InitStructure);
SPI_I2S_DMACmd(SPI1,SPI_I2S_DMAReq_Rx,ENABLE);
SPI_I2S_ClearFlag(SPI1,SPI_I2S_FLAG_RXNE);
// /* Enable DMA Stream Transfer Complete interrupt */
DMA_ITConfig(DMA1_Channel2, DMA_IT_TC, ENABLE);
DMA_Cmd(DMA1_Channel2, ENABLE);
SPI_Cmd(SPI1, ENABLE);
GPIO_ResetBits(GPIOA,GPIO_Pin_4);
}
//下面这个spi1的中断服务函数一定要有，不然进不了SPI1接收的DMA中断服务函数！！！！
void SPI1_IRQHandler(void)//貌似只有stm32F4才有数据流的概念，F1里面只有通道的概念
{
}
