spi_write_then_read函数分析 1. 基本功能和用途 spi_write_then_read函数是一个用于SPI(串行外设接口)通信的函数,它首先向SPI设备写入一系列数据,然后紧接着从同一设备读取数据。这个函数常用于需要同时进行数据发送和接收的场景,例如配置寄存器或读取设备状态。
在spi_write_then_read中,可变寄存器大小表示可以根据需求动态调整寄存器的大小。这意味着在每次传输数据时,可以根据具体情况选择不同大小的寄存器来存储数据。 spi_write_then_read的操作流程如下: 写入数据:首先,将要发送的数据写入到SPI发送缓冲区中。
Port_1— Input port to write data to SPI slave [Nx1] or [1xN] array Output expand all Port_1— Output port to read data from SPI slave device [Nx1] array Parameters expand all Slave select (SS) pin— Slave select pin to which SPI slave device is connected ...
SPI_FLASH_CS=0; //使能器件 SPI2_ReadWriteByte(W25X_ReadData); //发送读取命令 SPI2_Rea...
("spi_write_then_read error\n"); return ret; } return read_buf; } // MCP2515写寄存器函数 void mcp2515_write_reg(char reg, char value) { int ret; char write_buf[] = {0x02, reg, value}; // SPI写缓冲区,用于发送写寄存器命令 ret = spi_write(spi_dev, write_buf, sizeof(write_...
0 */spi_enable(SPI0); //spi_readwritebyte(0XFF);}//SPIx 读写一个字节//TxData:要写入的字节//返回值:读取到的字节uint8_t qjp19881132020-10-19 14:30:08 SD卡初始化程序一直卡死 最近接受一个项目,用的是MSP4305438A sd卡初始化时 程序一直卡死在SD_WaitReady(void)函数中的i = SD_SPI_Re...
SPIMaster_TransferSequential SPIMaster_WriteThenRead 結構 Typedefs storage.h sysevent.h uart.h wificonfig.h Azure Sphere 安全性服務 (AS3) API 版本更新 下載PDF 閱讀英文 儲存 新增至集合 新增至計劃 共用方式為 Facebookx.comLinkedIn電子郵件
spi_read write address time out spi_read write address time out Dentry cache hash table entries: 4096 (order: 2, 16384 bytes) Inode-cache hash table entries: 2048 (order: 1, 8192 bytes) Memory available: 14740k/16384k RAM, 0k/0k ROM (1196k kernel code, 255k data) Mount-ca...
spi部分设置如下：<&spi0 { status = "okay";pinctrl-names = "default";pinctrl-0 = <&spi0_...
But what I don't understand is how to use SPI to control these state changes. Do I need to provide a Linux driver for TJA1145? Can someone provide me a basic walkthrough on how to enable this CAN transceiver on S32G399A LLCE_CAN interface? Thank you very much for t...