你好,
请问一下
我需要测试spi 0 spi1 spi 2总线的读写,
将spi0的d0 d1转接在一起,发现tx 有数据波形出来,但rx就是没有读到数据
对应的dts
main_spi0: spi@2100000 {
compatible = "ti,am654-mcspi","ti,omap4-mcspi";
reg = <0x0 0x2100000 0x0 0x400>;
interrupts = <GIC_SPI 184 IRQ_TYPE_LEVEL_HIGH>; //222-190 32
clocks = <&k3_clks 260 1>;
power-domains = <&k3_pds 260 TI_SCI_PD_EXCLUSIVE>;
#address-cells = <1>;
#size-cells = <0>;
};
&main_spi0 {
status="okay";
pinctrl-names = "default";
pinctrl-0 = <&spi0_pins_default>;
//ti,pindir-d0-out-d1-in;
//spi-slave;
spidev@0 {
spi-max-frequency = <24000000>;
reg = <0>;
compatible = "linux,spidev";
};
};
spi0_pins_default: spi0_pins_default {
pinctrl-single,pins = <
J721E_IOPAD(0x1cc, PIN_OUTPUT, 0) /* AB5 SPI0_D0*/
J721E_IOPAD(0x1d0, PIN_OUTPUT, 0) /* AA3 SPI0_D1*/
J721E_IOPAD(0x1c8, PIN_OUTPUT, 0) /* AA1 SPI0_Clk*/
J721E_IOPAD(0x1c0, PIN_OUTPUT, 0) /* AA2 SPI0_CS0*/
>;
};