Question

我一直试图让几个菊花链7段显示器显示每个显示不同的信息，但我似乎无法让它工作。无论我尝试打印出来，都会在第一个显示屏上显示。

如何将数据推送到剩下的7段差异？我做错了什么（除了一切......）

local M = {}

local CS_PIN = 8
local MODS = 4      --number of modules
local DIGS = 8      --number of digits / module

local digits = {}
digits["0"] = 0x7E
digits["1"] = 0x30
digits["2"] = 0x6d
digits["3"] = 0x79
digits["4"] = 0x33
digits["5"] = 0x5b
digits["6"] = 0x5f
digits["7"] = 0x70
digits["8"] = 0x7f
digits["9"] = 0x7b

local function set(reg, data)
    gpio.write(CS_PIN, gpio.LOW)
    spi.send(1, reg * 256 + data)
    gpio.write(CS_PIN, gpio.HIGH)
end

function M.init()
    spi.setup(1, spi.MASTER, spi.CPOL_LOW, spi.CPHA_LOW, 16, 8)
    gpio.mode(CS_PIN, gpio.OUTPUT)
    gpio.write(CS_PIN, gpio.HIGH)
    set(0x0B, 7)
    set(0x09, 0)
    set(0x0F, 0)
    set(0x0A, 0)
    set(0x0C, 1)
end

function M.write(mod, str)
    --this should push the text to the next 7segment module but it doesnt
    --instead it prints some jibberish on the second segment
    for m = 1, MODS do
        if m < mod then
            set(0x00, 0)
        end
    end

    local dots = 0
    str = string.rep(" ", DIGS - str:gsub("%.", ""):len())..str
    for i = 1, str:gsub("%.", ""):len() do
        local s = str:gsub("%.", ""):sub(i, i)
        local ds = digits[s]
        local x = i + dots + 1
        if str:sub(x, x) == '.' then
            ds = ds + 0x80
            dots = dots + 1
        end
        set(DIGS - i + 1, ds)
    end
end

M.init()
M.write(1, '10000000')
M.write(2, '20000000')
M.write(3, '30000000')
M.write(4, '40000000')

如何在多个菊花链式7段显示器上显示文本

0 个答案: