现使用launchpad,想外挂一个flash 25Q41。请问有类似的参考例程么。
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你好,我在外挂Flash的时候遇到如下问题:
使用SSIDataPut函数,在示波器上观察没有发现有相对应的波形。
请问是下面是以下代码的初始化过程出错了么。
SysCtlPeripheralEnable(SYSCTL_PERIPH_SSI0);
SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOA);
GPIOPinConfigure(GPIO_PA2_SSI0CLK);
GPIOPinConfigure(GPIO_PA4_SSI0XDAT0);
GPIOPinConfigure(GPIO_PA5_SSI0XDAT1);
GPIOPinTypeSSI(SSI0_BASE, (GPIO_PIN_2 | GPIO_PIN_5 | GPIO_PIN_4));
ROM_GPIOPinTypeGPIOOutput(GPIO_PORTA_BASE, GPIO_PIN_3);
GPIOPinWrite(GPIO_PORTA_BASE, GPIO_PIN_3, GPIO_PIN_3);
SSIConfigSetExpClk(SFLASH_SSI_BASE, 120000000,
SSI_FRF_MOTO_MODE_0, SSI_MODE_MASTER, 8000000, 8);
SSIEnable(SSI0_BASE);
while(SSIBusy(SSI0_BASE));
SSIDataPut(SSI0_BASE,0x55);
SSIDataPut(SSI0_BASE,0x55);
SSIDataPut(SSI0_BASE,0x55);
SSIDataPut(SSI0_BASE,0x55);