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hwstub: rework i2c completely

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Change-Id: I1e5f87f15f0ca9586d8185316ffcaeef6d9d4d38
This commit is contained in:
Amaury Pouly 2013-10-22 00:24:32 +02:00
parent bfb67f41a9
commit 9ed9807854
4 changed files with 52 additions and 13 deletions
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13
utils/hwstub/tools/lua/stmp/i2c.lua
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@ -8,10 +8,7 @@ h:add("The STMP.clkctrl table handles the i2c device for all STMPs.")
function STMP.i2c.init()
HW.I2C.CTRL0.SFTRST.set()
STMP.pinctrl.pin(0, 30).muxsel("MAIN")
STMP.pinctrl.pin(0, 30).pull(true)
STMP.pinctrl.pin(0, 31).muxsel("MAIN")
STMP.pinctrl.pin(0, 31).pull(true)
STMP.pinctrl.i2c.setup()
STMP.i2c.reset()
STMP.i2c.set_speed(true)
end
@ -21,7 +18,9 @@ function STMP.i2c.reset()
HW.I2C.CTRL0.SFTRST.clr()
HW.I2C.CTRL0.CLKGATE.clr()
-- errata for IMX233
HW.I2C.CTRL1.ACK_MODE.set();
if STMP.is_imx233() then
HW.I2C.CTRL1.ACK_MODE.set();
end
end
function STMP.i2c.set_speed(fast)
@ -63,7 +62,9 @@ function STMP.i2c.transmit(slave_addr, buffer, send_stop)
while HW.I2C.CTRL0.RUN.read() == 1 do
end
if HW.I2C.CTRL1.NO_SLAVE_ACK_IRQ.read() == 1 then
HW.I2C.CTRL1.CLR_GOT_A_NAK.set()
if STMP.is_imx233() then
HW.I2C.CTRL1.CLR_GOT_A_NAK.set()
end
STMP.i2c.reset()
return false
end