voidSPI_SendByte(unsignedchardata){unsignedchari;for(i=0;i<8;i++){if(data&0x80){MOSI=1;// 发送1}else{MOSI=0;// 发送0}SCK=1;// 产生时钟信号SCK=0;// 结束时钟信号data<<=1;// 处理下一个数据位}} 接收字节数据 unsignedcharSPI_ReceiveByte(){unsignedchari,data=0;for(i=0;i<8;i...
while (SPI_I2S_GetFlagStatus(SPIx, SPI_I2S_FLAG_TXE) == RESET); /* Send the byte */ SPI_I2S_SendData(SPIx, byte); /* Wait for the transfer to complete */ while (SPI_I2S_GetFlagStatus(SPIx, SPI_I2S_FLAG_RXNE) == RESET); /* Return the received byte */ return SPI_I2S_Receive...
一、在例程中,先写一个通过 SPI 接口发送 16 位数据的函数。发送单个数据是采取SPI0_MasterSendByte库函数进行编写。 voidspi_write_test(uint16_t data) { GPIOA_ResetBits(GPIO_Pin_12);//片选信号拉低SPI0_MasterSendByte(data>>8);//向 SPI0 接口发送数据的高字节。使用 >> 操作符将数据右移 8 ...
uint8_t SPI_SendByte(uint8_t byte) { uint8_t d_read,d_send=byte; if(HAL_SPI_TransmitReceive(&hspi1,&d_send,&d_read,1,0xFFFFFF)!=HAL_OK) d_read=0XFF; return d_read; 审核编辑:黄飞
还剩下SPISendByte()函数,它属于SPI协议,放在gpio_spi.c里面: 代码语言:javascript 代码运行次数:0 复制 Cloud Studio代码运行 voidSPISendByte(unsigned char val){int i;for(i=0;i<8;i++){SPI_Set_CLK(0);SPI_Set_DO(val&0x80);SPI_Set_CLK(1);val<<=1;}} ...
SPI发送函数(标准库/HAL库) HLA库: uint8_t SPI_SendByte(uint8_t byte) { uint8_t d_read,d_send=byte; if(HAL_SPI_TransmitReceive(&hspi1,&d_send,&d_read,1,0xFFFFFF)!=HAL_OK) d_read=0XFF; return d_read; 审核编辑:黄飞
Send_byte(0x03); // Read command. Send_byte(addr >> 16); // send 3 address unsigned chars,High Byte Address First. Send_byte(addr >> 8); // Middle: the Second Byte. Send_byte(addr); // LOW : the Third Byte. for (i = 0; i < len; i++) // 128 Bytes Charactor/Chinese...
SPI_SendByte(addr & 0xFF);HAL_SPI_Receive(&hspi1, buffer, len, HAL_MAX_DELAY);W25Q64_CS_...
return (SPI_FLASH_SendByte(Dummy_Byte));} 由于SPI通讯模式配置为全双工模式，即收发是同步...
voidsend_byte(dat)//主机发送数据到从机 写操作//数据传输顺序:MSB→LSB{unsignedchari;cs_n=0;for(i=0;i<8;i++){sclk=0;if(dat&0x80){mosi=1;}else{mosi=0;}sclk=1;//上升沿锁存数据dat=(dat<<1);}sclk=0;//拉低dclk,方便后续操作} ...