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#include "../drivers/usb.h"
#include "../sys/core.h"
#define DRIVERS_USB_C
unsigned char usb_buffer0[256] = {0};
unsigned char usb_buffer1[256] = {0};
static struct UsbDeviceRequest udr = {
.Type = 0xA0, // DEVICE_TO_HOST | STDANDAD | DEVICE
.Request = 0x06, // GET_DESCRIPTOR
.Value = 0x0100, // descriptor.type = 0x01, decriptor.index = 0x00
.Index = 0,
.Length = 64,
};
void my_memcpy(void *dest, void *src, unsigned int n) {
char *src_char = (char *)src;
char *dest_char = (char *)dest;
for (unsigned int i=0; i<n; i++) {
dest_char[i] = src_char[i];
}
}
static void txrx_control_msg(uint8_t txlen)
{
// send setup & control packet
// set dma buffer
*USB_HOST_HCDMA0 = (unsigned long long) usb_buffer0;
*USB_HOST_HCDMA0 |= 0xC0000000;
// HCTSIZ0.Pid = 2'd3 (SETUP) , HCTSIZ0.PktCnt = 10'h1 , HCTSIZ0.XferSize = 18'd8
*USB_HOST_HCTSIZ0 = 3 << 29 | 1 << 19 | txlen;
// HCCAR1.ChEna = 1'b1
*USB_HOST_HCCHAR0 |= 1<<31;
// recieve control packet
// set dma buffer
*USB_HOST_HCDMA1 = (unsigned long long) usb_buffer1;
*USB_HOST_HCDMA1 |= 0xC0000000;
// HCTSIZ1.Pid = 2'd2 (DATA1) , HCTSIZ1.PktCnt = 10'h1 , HCTSIZ1.XferSize = 18'd64
*USB_HOST_HCTSIZ1 = 2 << 29 | 1 << 19 | 64;
// HCCAR1.ChEna = 1'b1
*USB_HOST_HCCHAR1 |= 1<<31;
}
void send_packet(void)
{
// HCCAR1.EPDir = 1'b0 (OUT) / 1'b01(IN), HCCAR1.MPS = 11'h40
*USB_HOST_HCCHAR0 |= 0x40; // OUT
*USB_HOST_HCCHAR1 |= 1 << 15 | 0x40; // IN
// build packet
my_memcpy(usb_buffer0, &udr, 8);
txrx_control_msg(8);
}
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