spi 問題，求助各路大神
各位大神求助一下，目前有 3 個問題！1. 我改了 fex ， 在系統中也看到的 /dev/spidev0.0但是我的 spi 訊號一直量測不到！
2. 我看了開機的 log ，但是我發現怎麼和網上看到的有的不一樣！: sw spi init !!
: Found 1 spi devices in config files
: boards num modalias max_spd_hz bus_numcs mode
: spi_board0 irq gpio not used
: 0 spidev 12000000 0 0 0x0
: bus num = 0, spi used = 1
: source = sdram_pll_p, src_clk = 360000000, mclk 90000000
<7>sun4i-spi sun4i-spi.0: registered master spi0
<6>sun4i-spi sun4i-spi.0: master is unqueued, this is deprecated
<7>spi spi0.0: setup mode 0, 8 bits/w, 12000000 Hz max --> 0
<7>sun4i-spi sun4i-spi.0: registered child spi0.0
: allwinners SoC SPI Driver loaded for Bus SPI-0 with 0 Slaves attached
: : driver probe succeed, base f1c17000, irq 12, dma_id 2!但是我看有的人是，沒有 "sun4i-spi sun4i-spi.0: master is unqueued, this is deprecated" 這一句，是否就是因為這樣，我才會有 spi 訊號出不來的問題！ [ 1.750000] : sw spi init !!
[ 1.760000] : Found 1 spi devices in config files
[ 1.770000] : boards num modalias max_spd_hz bus_numcs mode
[ 1.780000] : 0 spidev 200000 0 0 0x0
[ 1.790000] : bus num = 0, spi used = 1
[ 1.800000] : source = sdram_pll_p, src_clk = 480000000, mclk 96000000
[ 1.820000] sun4i-spi sun4i-spi.0: registered master spi0
[ 1.820000] spi spi0.0: setup mode 0, 8 bits/w, 200000 Hz max --> 0
[ 1.840000] sun4i-spi sun4i-spi.0: registered child spi0.0
[ 1.850000] : allwinners SoC SPI Driver loaded for Bus SPI-0 with 1 Slaves attached
[ 1.860000] : : driver probe succeed, base e88b8000, irq 10, dma_id 0!3. 我使用 echo 測試 spidev ，但是若是超過 64字節，系統就會報錯？root@linaro-ubuntu-desktop:/dev# echo "12345678901234567890123456789013245678901
2345678901234567890123" > spidev0.0
root@linaro-ubuntu-desktop:/dev# echo "12345678901234567890123456789013245678901
23456789012345678901234" > spidev0.0
: /home/evb/evb_allwinner/sunxi-bsp/linux-sunxi/drivers/spi/spi_sunxi.c(L583) unknow dma direction = 0 請問要如何解決這 3 問題呀！ 我搞了一個多星期了！ 各位大神幫下忙呀！
页:
[1]