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author | Amaury Pouly <amaury.pouly@gmail.com> | 2013-12-06 01:56:04 +0100 |
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committer | Amaury Pouly <amaury.pouly@gmail.com> | 2013-12-06 01:56:04 +0100 |
commit | 58bb4b9b4cc7d0e5eee9d2c5b0cb16237d889e4c (patch) | |
tree | dc0df1f9c812f484159e440cd93ec6ae6074a270 /utils/hwstub/tools/lua/stmp | |
parent | c945fb6e94252faa9c6cdf5a5e73a60ededda8a8 (diff) | |
download | rockbox-58bb4b9b4cc7d0e5eee9d2c5b0cb16237d889e4c.tar.gz rockbox-58bb4b9b4cc7d0e5eee9d2c5b0cb16237d889e4c.zip |
hwstub: implement i2c and i2c eeprom dump
Change-Id: Iff1b4f40affb88c104e7322e25cdbe34f8886476
Diffstat (limited to 'utils/hwstub/tools/lua/stmp')
-rw-r--r-- | utils/hwstub/tools/lua/stmp/i2c.lua | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/utils/hwstub/tools/lua/stmp/i2c.lua b/utils/hwstub/tools/lua/stmp/i2c.lua index 209f1df4e2..dee5aaedb6 100644 --- a/utils/hwstub/tools/lua/stmp/i2c.lua +++ b/utils/hwstub/tools/lua/stmp/i2c.lua | |||
@@ -73,4 +73,38 @@ function STMP.i2c.transmit(slave_addr, buffer, send_stop) | |||
73 | else | 73 | else |
74 | return true | 74 | return true |
75 | end | 75 | end |
76 | end | ||
77 | |||
78 | function STMP.i2c.receive(slave_addr, length) | ||
79 | if length > 4 then | ||
80 | error("PIO mode cannot receive mode than 4 bytes at once") | ||
81 | end | ||
82 | -- send address | ||
83 | HW.I2C.CTRL0.RETAIN_CLOCK.set() | ||
84 | STMP.i2c.transmit(bit32.bor(slave_addr, 1), {}, false, true) | ||
85 | HW.I2C.CTRL0.DIRECTION.clr() | ||
86 | HW.I2C.CTRL0.XFER_COUNT.write(length) | ||
87 | HW.I2C.CTRL0.SEND_NAK_ON_LAST.set() | ||
88 | HW.I2C.CTRL0.POST_SEND_STOP.set() | ||
89 | HW.I2C.CTRL0.RETAIN_CLOCK.clr() | ||
90 | HW.I2C.CTRL0.RUN.set() | ||
91 | while HW.I2C.CTRL0.RUN.read() == 1 do | ||
92 | end | ||
93 | if HW.I2C.CTRL1.NO_SLAVE_ACK_IRQ.read() == 1 then | ||
94 | if STMP.is_imx233() then | ||
95 | HW.I2C.CTRL1.CLR_GOT_A_NAK.set() | ||
96 | end | ||
97 | STMP.i2c.reset() | ||
98 | return nil | ||
99 | end | ||
100 | if HW.I2C.CTRL1.EARLY_TERM_IRQ.read() == 1 or HW.I2C.CTRL1.MASTER_LOSS_IRQ.read() == 1 then | ||
101 | return nil | ||
102 | else | ||
103 | local data = HW.I2C.DATA.read() | ||
104 | local res = {} | ||
105 | for i = 0, length - 1 do | ||
106 | table.insert(res, bit32.band(0xff, bit32.rshift(data, 8 * i))) | ||
107 | end | ||
108 | return res | ||
109 | end | ||
76 | end \ No newline at end of file | 110 | end \ No newline at end of file |