pcf8574 - pcf8574 IO Extension#
Adaptation status unknown
Note
This page document is automatically generated by this file. If there is any error, please submit issue or help modify pr, thank you!
Example
--Note: due to the use of sys.wait() all apis need to be used in the coroutine
-- Usage Examples
local pcf8574 = require "pcf8574"
i2cid = 0
i2c_speed = i2c.FAST
sys.taskInit(function()
i2c.setup(i2cid,i2c_speed)
pcf8574.init(i2cid)--initialization, passing in i2c_id
for i=0,7 do
print(pcf8574.pin(i))
end
pcf8574.pin(0,1)
for i=0,7 do
print(pcf8574.pin(i))
end
end)
pcf8574.init(i2c_id)#
pcf8574 Initialization
Parameters
Incoming Value Type |
Explanation |
---|---|
number |
The i2c bus id |
Return Value
return value type |
explanation |
---|---|
bool |
Successful return true |
Examples
pcf8574.init(0)
pcf8574.pin(pin,val)#
pcf8574 pin Control
Parameters
Incoming Value Type |
Explanation |
---|---|
number |
pin 0-7 |
number |
val 0/1 Optional, read level if not filled |
Return Value
return value type |
explanation |
---|---|
number |
If val is not filled, return read level |
Examples
pcf8574.pin(0,1)
print(pcf8574.pin(0))