| 发表于：2007-03-26 14:47:57 楼主 |
各位:
我现在在做arm-linux开发,涉及到硬件驱动的问题,我的内核是2.6.14.7,gcc是3.4.4.板子是samsung-s3c2410.
使用的是gpio,
i/o ports s3c2410a
port e control registers （gpecon, gpedat, and gpeup)
register address r/w description reset value
gpecon 0x56000040 r/w configure the pins of port e 0x0
gpedat 0x56000044 r/w the data register for port e undefined
gpeup 0x56000048 r/w pull-up disable register for port e 0x0
reserved 0x5600004c – reserved undefined
gpecon bit description
gpe15 [31:30] 00 = input 01 = output （open drain output)
10 = iicsda 11 = reserved
gpe14 [29:28] 00 = input 01 = output （open drain output)
10 = iicscl 11 = reserved
gpe13 [27:26] 00 = input 01 = output
10 = spiclk0 11 = reserved
gpe12 [25:24] 00 = input 01 = output
10 = spimosi0 11 = reserved
gpe11 [23:22] 00 = input 01 = output
10 = spimiso0 11 = reserved
gpe10 [21:20] 00 = input 01 = output
10 = sddat3 11 = reserved
gpe9 [19:18] 00 = input 01 = output
10 = sddat2 11 = reserved
gpe8 [17:16] 00 = input 01 = output
10 = sddat1 11 = reserved
gpe7 [15:14] 00 = input 01 = output
10 = sddat0 11 = reserved
gpe6 [13:12] 00 = input 01 = output
10 = sdcmd 11 = reserved
gpe5 [11:10] 00 = input 01 = output
10 = sdclk 11 = reserved
gpe4 [9:8] 00 = input 01 = output
10 = i2ssdo 11 = i2ssdi
gpe3 [7:6] 00 = input 01 = output
10 = i2ssdi 11 = nss0
gpe2 [5:4] 00 = input 01 = output
10 = cdclk 11 = reserved
gpe1 [3:2] 00 = input 01 = output
10 = i2ssclk 11 = reserved
gpe0 [1:0] 00 = input 01 = output
10 = i2slrck 11 = reserved
gpe[15:0] [15:0] when the port is configured as input port, data from external sources can b
read to the corresponding pin. when the port is configured as output port, d
written in this register can be sent to the corresponding pin. when the port
configured as a functional pin, undefined value will be read.
gpeup bit description
gpe[15:0] [15:0] 0: the pull-up function attached to to the corresponding port pin is enabled.
1: the pull-up function is disabled.
就是上面的这个io,请高手们帮个忙,非常感谢了
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