spi - spi操作库

本页文档由[这个文件](https://gitee.com/openLuat/LuatOS/tree/master/luat/modules/luat_lib_spi.c)自动生成。如有错误，请提交issue或帮忙修改后pr，谢谢！

本库有专属demo，[点此链接查看spi的demo例子](https://gitee.com/openLuat/LuatOS/tree/master/demo/spi)

本库还有视频教程，[点此链接查看](https://www.bilibili.com/video/BV1VY411M7YH)

-- 初始化spi
spi.setup(0,20,0,0,8,2000000,spi.MSB,1,1)

-- 初始化软件spi
local softSpiDevice = spi.createSoft(0, 1, 2, 3, 0, 0, 8, spi.MSB, 1, 1)
local result = spi.send(softSpiDevice, string.char(0x9f))

-- 初始化spi
spi.close(0)

-- 初始化spi
spi.setup(0,nil,0,0,8,2000000,spi.MSB,1,1)
local recv = spi.transfer(0, "123")--发送123,并读取数据

local buff = zbuff.create(1024, 0x33) --创建一个初值全为0x33的内存区域
local recv = spi.transfer(0, buff)--把zbuff数据从指针开始，全发出去,并读取数据

-- 初始化spi
spi.setup(0,nil,0,0,8,2000000,spi.MSB,1,1)
-- 接收数据
local recv = spi.recv(0, 4)--接收4字节数据

-- 当传入zbuff参数时,返回值有所不同. 2024.3.29新增
-- 读取成功后, 指针会往后移动len个字节
-- 写入位置以当前used()位置开始, 请务必确保有足够空间写入len长度的数据
local len = spi.recv(0, 4, buff)

-- 初始化spi
spi.setup(0,nil,0,0,8,2000000,spi.MSB,1,1)
local result = spi.send(0, "123")--发送123

local buff = zbuff.create(1024, 0x33) --创建一个初值全为0x33的内存区域
local result = spi.send(0, buff)--把zbuff数据从指针开始，全发出去

-- 初始化spi
local spi_device = spi.deviceSetup(0,17,0,0,8,2000000,spi.MSB,1,1)

-- 初始化spi
spi_device.close()

-- 初始化spi
local spi_device = spi.device_setup(0,17,0,0,8,2000000,spi.MSB,1,1)
local recv = spi_device:transfer("123")--发送123,并读取数据
local result = spi_device:transfer({0x00,0x01})--发送0x00,0x01,并读取数据

local buff = zbuff.create(1024, 0x33) --创建一个初值全为0x33的内存区域
local recv = spi_device:transfer(buff)--把zbuff数据从指针开始，全发出去,并读取数据

-- 初始化spi
local spi_device = spi.device_setup(0,17,0,0,8,2000000,spi.MSB,1,1)
local result = spi_device:send("123")--发送123
local result = spi_device:send({0x00,0x01})--发送0x00,0x01

local buff = zbuff.create(1024, 0x33) --创建一个初值全为0x33的内存区域
local result = spi_device:send(buff)--把zbuff数据从指针开始，全发出去

-- 初始化spi
local spi_device = spi.device_setup(0,17,0,0,8,2000000,spi.MSB,1,1)
local recv = spi_device:recv(4)--接收4字节数据

local result = spi.xfer(spi.SPI_0, txbuff, rxbuff, 1024, "SPIDONE") if result then result, spi_id, succ, error_code = sys.waitUntil("SPIDONE") end if not result or not succ then log.info("spi fail, error code", error_code) else log.info("spi ok") end