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[fluksod] spi half-duplex logic is now handled in the kernel driver

This commit is contained in:
Bart Van Der Meerssche 2011-01-15 19:56:40 +01:00
parent f033d465ad
commit 968e25c863
1 changed files with 7 additions and 3 deletions
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10
mote/v2/openwrt/package/flukso/luasrc/flukso/spi.lua
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@ -30,6 +30,8 @@ local getfenv, setmetatable =
module (...)
local modenv = getfenv()
local SPI_MAX_READ_BYTES = 256
--- Create a new spi message object.
--
-- Attributes:
@ -103,16 +105,18 @@ end
function tx(msg, cdev)
if msg.to == 'ctrl' or msg.to == 'delta' then
cdev:write('l' .. msg.encoded .. '.\0\0')
cdev:write('l' .. msg.encoded .. '.')
elseif msg.to == 'uart' then
cdev:write('u' .. msg.encoded .. '\0\0')
cdev:write('u' .. msg.encoded)
end
end
function rx(msg, cdev)
msg.received = {}
msg.received.raw = cdev:spiread()
msg.received.raw = cdev:read(SPI_MAX_READ_BYTES)
msg.received.l, msg.received.u = msg.received.raw:match('^l(%w*)%.?u(%w*)%.?$')
-- protect against nil values when match should fail
msg.received.l, msg.received.u = msg.received.l or '', msg.received.u or ''
if msg.received.l ~= '' and msg.received.l:sub(1, 2) == msg.parsed[1] then
msg.received.crc = msg.received.l:sub(-2, -1)