ws2812驱动

Keil-LL

Keil-HAL

Arduino

LuaOS

sensor.ws2812b_pwm(pin,data)：800k的PWM输出频率
sensor.ws2812b_spi(pin,data)：5Mbps 的SPI输出速率

local ws2812_w = 8
local ws2812_h = 8
local buff = zbuff.create({ws2812_w,ws2812_h,24},0x000000)

local function ws2812_roll_show(show_data,data_w)
    local m = 0
    while 1 do
        for j=0,ws2812_w-1 do
            if j%2==0 then
                for i=ws2812_w-1,0,-1 do
                    if m+ws2812_w-i>data_w then
                        buff:pixel(i,j,show_data[j+1][m+ws2812_w-i-data_w])
                    else
                        buff:pixel(i,j,show_data[j+1][m+ws2812_w-i])
                    end
                end
            else
                for i=0,ws2812_w-1 do
                    if m+i+1>data_w then
                        buff:pixel(i,j,show_data[j+1][m+i+1-data_w])
                    else
                        buff:pixel(i,j,show_data[j+1][m+i+1])
                    end
                end
            end
        end
        m = m+1
        if m==data_w then m=0 end
        sensor.ws2812b_pwm(5,buff)--此处使用pwm方法驱动,当然也可以用gpio,spi方式,API详情查看wiki https://wiki.luatos.com/api/sensor.html
        -- sensor.ws2812b_spi(0,buff)
        sys.wait(300)
    end
end