SysCtlPeripheralEnable(SYSCTL_PERIPH_SSI0);//开启SSI0时钟SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOA);//开启GPIOA时钟GPIOPinConfigure(GPIO_PA2_SSI0CLK);//配置为SSI0CLK复用功能GPIOPinConfigure(GPIO_PA3_SSI0FSS);//配置为SSI0FSS复用功能GPIOPinConfigure(GPIO_PA5_SSI0TX);//配置为SSI0TX复用功能GPIOPinTypeSSI(GPIO_PORTA_BASE,GPIO_PIN_2|GPIO_PIN_