SPI device driver issue on Cubietruck Android
Hi everyone,I have a question on cubietruck SPI, and am seeking help from this group. Hope someone can help me.
My target OS is android, and the BSP is cubieboard2_android_SDK_v1.09. The SPI2 (pin5~8) is used and the configuration is as following:
spi_used = 1
spi_cs_bitmap = 1
spi_cs0 = port:PC19<3><default><default><default>
spi_cs1 = port:PB13<2><default><default><default>
spi_sclk = port:PC20<3><default><default><default>
spi_mosi = port:PC21<3><default><default><default>
spi_miso = port:PC22<3><default><default><default>
spi_dev_num = 1
modalias = "spidev"
max_speed_hz = 12000000
bus_num = 2
chip_select = 0
mode = 0
full_duplex = 0
manual_cs = 0
When I try to debug the spi driver, I got the log info as following:
sun7i_spi_transfer: enter
sun7i_spi_work: enter
sun7i_spi_xfer: spi2 begin transfer, txbuf ecea2ac0, rxbuf (null), len 246
spi_set_bc_wtc: bc: 246
spi_set_bc_wtc: tc: 246
sun7i_spi_prepare_dma: enter
sun7i_spi_config_dma: enter
sun7i_spi_start_dma: enter
sun7i_spi_xfer: spi2 wait for xfer complete
init: sys_prop: permission denied uid:1003name:service.bootanim.exit
start_powernow uncare mode:859320624!
wait for xfer complete sun7i_spi_transfer: enter
/dev/ttyS0: wait: for: argument must be %job or process id
/dev/ttyS0: wait: xfer: argument must be %job or process id
/dev/ttyS0: wait: complete: argument must be %job or process id
/dev/ttyS0: wait: sun7i_spi_transfer:: argument must be %job or process id
/dev/ttyS0: wait: enter: argument must be %job or process id
sun7i_spi_work: enter
/dev/ttyS0: : not found
sun7i_spi_xfer: spi2 begin transfer, txbuf ecea2ac0, rxbuf (null), len 246
/dev/ttyS0: syntax error: '(' unexpected
sun7i_spi_prepare_dma: enter
/dev/ttyS0: : not found
sun7i_spi_config_dma: enter
/dev/ttyS0: : not found
sun7i_spi_start_dma: enter
/dev/ttyS0: : not found
sun7i_spi_xfer: spi2 wait for xfer complete
Somehow SPI transferring was never get finished.
May someone tell me what's wrong and how to do?
Thanksa lot in advance! https://github.com/jiangdoudou/linux-sdk-a20/tree/shanghai-a20-spi/spi-driver-test jiangdou 发表于 2015-9-22 12:32 static/image/common/back.gif
https://github.com/jiangdoudou/linux-sdk-a20/tree/shanghai-a20-spi/spi-driver-test
Hi Jiangdou,
I will try it and thanks a lot! Hello all,
I have found the following descriptions in A20_系统配置手册_V1.0_20130521.pdf
Page #26
7.6.
chip_select=xx 理论上可以选0,1,2,3,目前只支持1,2(芯片没引出接口)
This pdf file could be found in Android BSP, the path is lichee/tools_win/documentations.
is there anyone could help to explain it?
Thanks a lot! Page #26
7.6.
chip_select=xx xx should be 0,1,2,3, but only 1,2 for A20
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