tiny4412使用---ubuntu下的dnw

最新推荐文章于 2021-05-07 21:16:44 发布

转载最新推荐文章于 2021-05-07 21:16:44 发布 · 566 阅读

本文介绍如何使用dnw2linux工具结合libusb库，实现通过USB接口进行设备下载操作，避免了传统SD卡烧录过程中的插拔步骤，提升效率与便利性。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

以前在tiny4412上用ubuntu下的dnw,不用装驱动一个ELF文件就可以执行下载.
把以前的代码拿过来修改了一下,发现还是不错的,呵呵,这下烧的时候不用插拔SD卡了! (附件中有编译好的dnw)
dusb.c

/* dnw2 linux main file. This depends on libusb.
*
* Author: Fox <hulifox008@163.com>
* License: GPL
* dusb.c
*/
#include <stdio.h>
#include <usb.h>
#include <errno.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#if 1
#define QQ2440_SECBULK_IDVENDOR 0x04e8
#define QQ2440_SECBULK_IDPRODUCT 0x1234
#else
#define QQ2440_SECBULK_IDVENDOR 0x1234
#define QQ2440_SECBULK_IDPRODUCT 0x04e8
#endif
struct usb_dev_handle * open_port() {
struct usb_bus *busses, *bus;
usb_init();
usb_find_busses();
usb_find_devices();
busses = usb_get_busses();
for (bus = busses; bus; bus = bus->next) {
struct usb_device *dev;
for (dev = bus->devices; dev; dev = dev->next) {
printf("idVendor:0x%xt,ipProduct:0x%xn",
dev->descriptor.idVendor, dev->descriptor.idProduct);
if (QQ2440_SECBULK_IDVENDOR == dev->descriptor.idVendor
&& QQ2440_SECBULK_IDPRODUCT == dev->descriptor.idProduct) {
printf("Target usb device found!n");
struct usb_dev_handle *hdev = usb_open(dev);
if (!hdev) {
perror("Cannot open device");
} else {
if (0 != usb_claim_interface(hdev, 0)) {
perror("Cannot claim interface");
usb_close(hdev);
hdev = NULL;
}
}
return hdev;
}
}
}
printf("Target usb device not found!n");
return NULL;
}
void usage() {
printf("Usage: dnw2 nn");
}
unsigned char* prepare_write_buf(char *filename, unsigned int *len) {
unsigned char *write_buf = NULL;
struct stat fs;
int fd = open(filename, O_RDONLY);
if (-1 == fd) {
perror("Cannot open file");
return NULL;
}
if (-1 == fstat(fd, &fs)) {
perror("Cannot get file size");
goto error;
}
write_buf = (unsigned char*) malloc(fs.st_size + 10);
if (NULL == write_buf) {
perror("malloc failed");
goto error;
}
if (fs.st_size != read(fd, write_buf+8, fs.st_size)) {
perror("Reading file failed");
goto error;
}
printf("Filename : %sn", filename);
printf("Filesize : 0x%x bytesn", (int)fs.st_size);
*((u_int32_t*) write_buf) = 0x30000000; //download address:这个值写啥无所谓
*((u_int32_t*) write_buf + 1) = fs.st_size + 10; //download size;
//USB format : addr(4)+size(4)+data(n)+cs(2)
// 主要是添加了下面这部分内容: 生成checksum值,并写到write_buf中
//如果重新编译的u-boot去掉了 #ifdef USB_CHECKSUM_EN,那么下面这个可以不加
int i;
unsigned short checkSum = 0;
unsigned char* cs_start = write_buf+8;
unsigned char* cs_end = write_buf+8+fs.st_size;
while(cs_start < cs_end) {
checkSum += *cs_start++;
}
printf("checkSum=0x%xn", checkSum);
*(unsigned short*)(write_buf+fs.st_size+8) = checkSum;
*len = fs.st_size + 10;
return write_buf;
error: if (fd != -1)
close(fd);
if (NULL != write_buf)
free(write_buf);
fs.st_size = 0;
return NULL;
}
int main(int argc, char *argv[]) {
if (2 != argc) {
usage();
return 1;
}
struct usb_dev_handle *hdev = open_port();
if (!hdev) {
return 1;
}
unsigned int len = 0;
unsigned char* write_buf = prepare_write_buf(argv[1], &len);
if (NULL == write_buf)
return 1;
unsigned int remain = len;
unsigned int towrite;
printf("Writing data ...n");
while (remain) {
towrite = remain > 512 ? 512 : remain;
//端点与TQ2440不一样是个二
//if (towrite != usb_bulk_write(hdev, 0x03, write_buf + (len - remain), towrite, 3000)) {
if (towrite != usb_bulk_write(hdev, 0x02, write_buf + (len - remain), towrite, 3000)) {
perror("usb_bulk_write failed");
break;
}
remain -= towrite;
printf("r%dt %d bytes ", (len-remain)*100/len, len-remain);
fflush(stdout);
}
if (0 == remain)
printf("Done!n");
return 0;
}