main.c
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#include "libusb-1.0/libusb.h"
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
int Initialize_Device(libusb_context ** ctx, libusb_device_handle ** usb_device)
{
int ret = 0;
*usb_device = libusb_open_device_with_vid_pid(*ctx, 0x0a5c, 0x2763);
if (*usb_device == NULL)
{
return -1;
}
ret = libusb_claim_interface(*usb_device, 0);
if (ret)
{
printf("Failed to claim interface\n");
return ret;
}
return ret;
}
int ep_write(unsigned char *buf, int len, libusb_device_handle * usb_device)
{
int ret =
libusb_control_transfer(usb_device, LIBUSB_REQUEST_TYPE_VENDOR, 0,
len & 0xffff, len >> 16, NULL, 0, 1000);
int a_len;
libusb_bulk_transfer(usb_device, 0x01, buf, len, &a_len, 1000);
return a_len;
}
int ep_read(unsigned char *buf, int len, libusb_device_handle * usb_device)
{
int ret =
libusb_control_transfer(usb_device,
LIBUSB_REQUEST_TYPE_VENDOR |
LIBUSB_ENDPOINT_IN, 0, len & 0xffff,
len >> 16, buf, len, 1000);
return len;
}
int main(int argc, char *argv[])
{
int result;
libusb_context *ctx;
libusb_device_handle *usb_device;
unsigned char *txbuf;
int size;
int retcode;
FILE *fp1, *fp2;
char def1[] = "usbbootcode.bin";
char def2[] = "msd.bin";
char *str1, *str2;
struct MESSAGE_S {
int length;
unsigned char signature[20];
} message;
if (argc < 3)
{
str1 = def1;
str2 = def2;
} else
{
str1 = argv[1];
str2 = argv[2];
}
fp1 = fopen(str1, "rb");
if (fp1 == NULL)
{
printf("Cannot open file %s\n", str1);
exit(-1);
}
fp2 = fopen(str2, "rb");
if (fp2 == NULL)
{
printf("Cannot open file %s\n", str2);
exit(-1);
}
int ret = libusb_init(&ctx);
if (ret)
{
printf("Failed to initialise libUSB\n");
exit(-1);
}
libusb_set_debug(ctx, 0);
while (1)
{
FILE *fp;
printf("Waiting for BCM2835 ...\n");
// Wait for a device to get plugged in
do
{
result = Initialize_Device(&ctx, &usb_device);
if (result)
{
sleep(1);
}
}
while (result);
{
struct libusb_device_descriptor desc;
ret =
libusb_get_device_descriptor(libusb_get_device
(usb_device), &desc);
printf("Found serial = %d: writing file %s\n",
desc.iSerialNumber,
desc.iSerialNumber == 0 ? str1 : str2);
fp = desc.iSerialNumber == 0 ? fp1 : fp2;
}
fseek(fp, 0, SEEK_END);
message.length = ftell(fp);
fseek(fp, 0, SEEK_SET);
txbuf = (unsigned char *)malloc(message.length);
if (txbuf == NULL)
{
printf("Failed to allocate memory\n");
exit(-1);
}
fread(txbuf, 1, message.length, fp);
size =
ep_write((unsigned char *)&message, sizeof(message),
usb_device);
if (size != sizeof(message))
{
printf("Failed to write correct length, returned %d\n",
size);
exit(-1);
}
size = ep_write(txbuf, message.length, usb_device);
if (size != message.length)
{
printf("Failed to read correct length, returned %d\n",
size);
exit(-1);
}
sleep(1);
size =
ep_read((unsigned char *)&retcode, sizeof(retcode),
usb_device);
if (retcode == 0)
{
printf("Successfull\n");
if(fp==fp2)
{
printf("Raspberry Pi is now a mass storage device, use lsblk to find it\n");
exit(0);
}
else
printf("Failed : 0x%x", retcode);
sleep(1);
libusb_close(usb_device);
}
libusb_exit(ctx);
return 0;
}