add: 24c02 demo单独放一个文件

bsp/air302/demo/i2c/24c02main.lua

@@ -0,0 +1,37 @@
+
+-- LuaTools需要PROJECT和VERSION这两个信息
+PROJECT = "i2c 24c02 demo"
+VERSION = "1.0.0"
+
+-- sys库是标配
+local sys = require "sys"
+
+--1010 000x
+local addr = 0x50
+-- 当前仅支持i2c0哦
+local i2cid = 0
+
+sys.taskInit(function()
+    log.info("i2c initial",i2c.setup(0))
+    while true do
+        --第一种方式
+        i2c.send(i2cid, addr, string.char(0x01).."1234abcd")
+        sys.wait(100)
+        i2c.send(i2cid, addr, string.char(0x01))
+        local data = i2c.recv(i2cid, addr, 8)
+        log.info("i2c", "data1",data:toHex(),data)
+
+        --第二种方式
+        i2c.writeReg(i2cid, addr, 0x01, "abcd1234")
+        sys.wait(100)
+        local data = i2c.readReg(i2cid, addr, 0x01, 8)
+        log.info("i2c", "data2",data:toHex(),data)
+        sys.wait(1000)
+    end
+
+end)
+
+-- 用户代码已结束---------------------------------------------
+-- 结尾总是这一句
+sys.run()
+-- sys.run()之后后面不要加任何语句!!!!!

bsp/air302/demo/i2c/main.lua

@@ -6,27 +6,98 @@ VERSION = "1.0.0"
 -- sys库是标配
 local sys = require "sys"
 
---1010000x
-local addr = 0x50
 -- 当前仅支持i2c0哦
-local i2cid = 0
+i2c.setup(0)
+
+-- 读取 OPT3001 光亮度传感器的数据
+
+-- OPT3001 device addr
+local OPT3001_DEVICE_ADDR           = 0x44
+
+-- OPT3001 register addr
+local OPT3001_REG_RESULT            = 0x00
+local OPT3001_REG_CONFIGURATION     = 0x01
+local OPT3001_REG_LOW_LIMIT         = 0x02
+local OPT3001_REG_HIGH_LIMIT        = 0x03
+local OPT3001_REG_MANUFACTURE_ID    = 0x7E
+local OPT3001_REG_DEVICE_ID         = 0x7F
+
+--OPT3001 CONFIG resister bit map
+local CONFIG_RN_Pos         = (12)
+local CONFIG_RN_Msk         = (0xF << CONFIG_RN_Pos) -- Lua 5.3支持各种位运算符, 这在Lua 5.1是没有的
+
+local CONFIG_CT_Pos         = (11)
+local CONFIG_CT_Msk         = (0x1 << CONFIG_CT_Pos)
+
+local CONFIG_M_Pos          = (9)
+local CONFIG_M_Msk          = (0x3 << CONFIG_M_Pos)
+
+local CONFIG_OVF_Pos        = (8)
+local CONFIG_OVF_Msk        = (0x1 << CONFIG_OVF_Pos)
+
+local CONFIG_CRF_Pos        = (7)
+local CONFIG_CRF_Msk        = (0x1 << CONFIG_CRF_Pos)
+
+local CONFIG_FH_Pos         = (6)
+local CONFIG_FH_Msk         = (0x1 << CONFIG_FH_Pos)
+
+local CONFIG_FL_Pos         = (5)
+local CONFIG_FL_Msk         = (0x1 << CONFIG_FL_Pos)
+
+local CONFIG_L_Pos          = (4)
+local CONFIG_L_Msk          = (0x1 << CONFIG_L_Pos)
+
+local CONFIG_POL_Pos        = (3)
+local CONFIG_POL_Msk        = (0x1 << CONFIG_POL_Pos)
+
+local CONFIG_ME_Pos         = (2)
+local CONFIG_ME_Msk         = (0x1 << CONFIG_ME_Pos)
+
+local CONFIG_FC_Pos         = (0)
+local CONFIG_FC_Msk         = (0x3 << CONFIG_L_Pos)
+
+
+-- OPT3001 CONFIG setting macro
+local CONFIG_CT_100         = 0x0000                           -- conversion time set to 100ms
+local CONFIG_CT_800         = CONFIG_CT_Msk                    -- conversion time set to 800ms
+
+local CONFIG_M_CONTI        = (0x2 << CONFIG_M_Pos)            -- continuous conversions
+local CONFIG_M_SINGLE       = (0x1 << CONFIG_M_Pos)            -- single-shot
+local CONFIG_M_SHUTDOWN     = 0x0000                           -- shutdown
+
+
+local CONFIG_RN_RESET       = (0xC << CONFIG_RN_Pos)
+local CONFIG_CT_RESET       = CONFIG_CT_800
+local CONFIG_L_RESET        = CONFIG_L_Msk
+local CONFIG_DEFAULTS       = (CONFIG_RN_RESET | CONFIG_CT_RESET | CONFIG_L_RESET)
+
+local CONFIG_ENABLE_CONTINUOUS     = (CONFIG_M_CONTI | CONFIG_DEFAULTS)
+local CONFIG_ENABLE_SINGLE_SHOT    = (CONFIG_M_SINGLE | CONFIG_DEFAULTS)
+local CONFIG_DISABLE    =  CONFIG_DEFAULTS
 
 sys.taskInit(function()
-    log.info("i2c initial",i2c.setup(0))
-    while true do
-        i2c.send(i2cid, addr, string.char(0x01).."1234abcd")
-        sys.wait(100)
-        i2c.send(i2cid, addr, string.char(0x01))
-        local data = i2c.recv(i2cid, addr, 8)
-        log.info("i2c", "data1",data:toHex(),data)
-
-        i2c.writeReg(i2cid, addr, 0x01, "abcd1234")
-        sys.wait(100)
-        local data = i2c.readReg(i2cid, addr, 0x01, 8)
-        log.info("i2c", "data2",data:toHex(),data)
-        sys.wait(1000)
+    -- 读取device id, 应该是0x3001 = 12289
+    local devid = i2c.readReg(0, OPT3001_DEVICE_ADDR, OPT3001_REG_DEVICE_ID)
+    log.info("i2c", "opt3001", "device id", devid)
+    -- 设置为持续转换
+    i2c.writeReg(0, OPT3001_DEVICE_ADDR, OPT3001_REG_CONFIGURATION, CONFIG_ENABLE_CONTINUOUS)
+    local regVal = 0
+    while 1 do
+        while 1 do
+            log.info("i2c", "check sensor data ready")
+            regVal = i2c.readReg(0, OPT3001_DEVICE_ADDR, OPT3001_REG_CONFIGURATION)
+            if (regVal & CONFIG_CRF_Msk) then
+                log.info("i2c", "sensor data ready")
+                break
+            end
+            sys.wait(3000)
+        end
+        regVal = i2c.readReg(0, OPT3001_DEVICE_ADDR, OPT3001_REG_RESULT)
+        local fraction = regVal & 0xFFF
+        local exponent = 1 << (regVal >> 12)
+        log.info("i2c", "read lux=", fraction * exponent, "/100")
+        sys.wait(3000)
     end
-
 end)
 
 -- 用户代码已结束---------------------------------------------