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#include "spi.h"
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void WIZ_SPI_Init(void)
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{
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// 初始化GPIO管脚和SPI的参数设置：建立SPI和GPIO的初始化结构体
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SPI_InitTypeDef SPI_InitStructure;
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GPIO_InitTypeDef GPIO_InitStructure;
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RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);
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GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12;
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GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
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GPIO_Init(GPIOB, &GPIO_InitStructure);
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GPIO_SetBits(GPIOB, GPIO_Pin_12);
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/* GPIO Config -------------------------------------------------------------*/
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RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB,ENABLE);
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GPIO_InitStructure.GPIO_Pin=GPIO_Pin_13|GPIO_Pin_14|GPIO_Pin_15;
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GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
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GPIO_Init(GPIOB, &GPIO_InitStructure);
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/* SPI Config -------------------------------------------------------------*/
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RCC_APB1PeriphClockCmd(RCC_APB1Periph_SPI2 , ENABLE);
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SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex;
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SPI_InitStructure.SPI_Mode = SPI_Mode_Master;
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SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b;
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SPI_InitStructure.SPI_CPOL = SPI_CPOL_Low;
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SPI_InitStructure.SPI_CPHA = SPI_CPHA_1Edge;
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SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;
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SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_4;
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SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;
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SPI_InitStructure.SPI_CRCPolynomial = 7;
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SPI_Init(SPI2, &SPI_InitStructure);
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/* Enable SPI */
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SPI_Cmd(SPI2, ENABLE);
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}
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// Connected to Data Flash
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void WIZ_CS(uint8_t val)
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{
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if (val == LOW)
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{
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GPIO_ResetBits(GPIOB, GPIO_Pin_12); // GPIOB的WIZ_SCS（GPIO_Pin_12）引脚清零拉低
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}
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else if (val == HIGH)
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{
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GPIO_SetBits(GPIOB, GPIO_Pin_12); // GPIOB的WIZ_SCS（GPIO_Pin_12）引脚置1拉高
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}
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}
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uint8_t SPI2_SendByte(uint8_t byte)
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{
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while (SPI_I2S_GetFlagStatus(SPI2, SPI_I2S_FLAG_TXE) == RESET); // 等待发送区空
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SPI_I2S_SendData(SPI2, byte); // 发送一个字节
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while (SPI_I2S_GetFlagStatus(SPI2, SPI_I2S_FLAG_RXNE) == RESET); // 等待接收完一个字节
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return SPI_I2S_ReceiveData(SPI2); // 返回收到的数据
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}
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