am335x spitest没有自发自收的测试打印

am335x-bone-common.dtsi中添加
spi1_pins_default: spi1_pins_default {
		pinctrl-single,pins = <
			AM33XX_IOPAD(0x990, PIN_INPUT_PULLUP | MUX_MODE3) /* (A13) mcasp0_aclkx.spi1_sclk */
			AM33XX_IOPAD(0x994, PIN_INPUT_PULLUP | MUX_MODE3) /* (B13) mcasp0_fsx.spi1_d0 */
			AM33XX_IOPAD(0x998, PIN_OUTPUT_PULLUP | MUX_MODE3) /* (D12) mcasp0_axr0.spi1_d1 */
			AM33XX_IOPAD(0x99c, PIN_OUTPUT_PULLUP | MUX_MODE3) /* (C12) mcasp0_ahclkr.spi1_cs0 */
	>;
	};

&spi1 {
	#address-cells = <1>;
	#size-cells = <0>;

	status = "okay";
	pinctrl-names = "default";
	pinctrl-0 = <&spi1_pins_default>;


	channel@0 {
		#address-cells = <1>;
		#size-cells = <0>;

		compatible = "spidev";

		reg = <0>;
		spi-max-frequency = <16000000>;
		spi-cpha;
	};

};

编译好后，进入系统，dmesg显示spi1的pinctrl占用了macsp的管脚，注册了spidev1.0设备，短接D0和D1

./spifdv_test -D /dev/spidev1.0
该命令只打印出spi1的mode，发送模式和工作频率，并没有发送数据的过程

sjl3110：

急急急急急急

yongqing wang：

回复 sjl3110:

spitest 有比较多的配置参数

yongqing wang：

回复 yongqing wang:

加个 -h看看

Shine：

回复 sjl3110:

请问有量过SPI管脚的时序吗？

Shine：

回复 Shine:

把SPI管脚都设成PIN_INPUT模式。AM33XX_IOPAD(0x998, PIN_OUTPUT_PULLUP | MUX_MODE3) /* (D12) mcasp0_axr0.spi1_d1 */AM33XX_IOPAD(0x99c, PIN_OUTPUT_PULLUP | MUX_MODE3) /* (C12) mcasp0_ahclkr.spi1_cs0 */