Hi,

when i set  io_cfg.useSpi    = CyTrue in main function before call CyU3PDeviceConfigureIOMatrix, i find fx3 can't be recongnized by host( device manager can't see my usb3.0 device), although i can hear dingdong. Would someone tell me is there specital attention should be payed?

If i can't set spi true, where is the right place i can use spi?

in sdk beta3, i don't need set io_cfg.lppMode   = CY_U3P_IO_MATRIX_LPP_UART_ONLY; but in beta4 or v1.0 release, if i don't set, the things is same to above. what's wrong?

Regards!

Thanks!

Hi Mike,

SPI just works if the GPIF is configured in 16-bit mode. That means if you like to use SPI you have to configure io_cfg.isDQ32Bit to CyFalse and may be io_cfg.lppMode to default.

Regards

lumpi

Thanks Lumpi6! That is the reason.

    io_cfg.useUart   = CyTrue;
    io_cfg.useI2C    = CyTrue;
    io_cfg.useI2S    = CyFalse;
    io_cfg.useSpi    = CyTrue;
    io_cfg.isDQ32Bit = CyFalse;
    io_cfg.lppMode   = CY_U3P_IO_MATRIX_LPP_DEFAULT; // should not be CY_U3P_IO_MATRIX_LPP_UART_ONLY;
    io_cfg.gpioSimpleEn[0]  = 0;
    io_cfg.gpioSimpleEn[1]  = 0;
    io_cfg.gpioComplexEn[0] = 0;
    io_cfg.gpioComplexEn[1] = 0;
    status = CyU3PDeviceConfigureIOMatrix ( &io_cfg );