Linux学习笔记5---WSL2编译裸机程序并烧录至SD卡

        在用WLS进行开发的时候发现在mnt/底下竟然识别不了U盘！！也识别不了SD卡！！那程序不就不能烧录到SD卡上了？？？那还开发个锤子。

        在网上查找了一些相关资料，发现可以通过Win32DiskImager在Windows系统下烧录SD卡。将软件安装到电脑上。

Win32DiskImager下载链接：Win32 Disk Imager download | SourceForge.net

正点原子的imxdownload由于包含了烧录的功能，但在WLS上无法识别SD卡，因此无法使用，所以可以将imxdownload的烧录功能都取消，让程序生成一个可烧录的镜像文件即可。

imxdownload.c(正点原子官方.c文件中修改)

#include "stdio.h"
#include "stdlib.h"
#include "string.h"
#include "imxdownload.h"#define SHELLCMD_LEN    (200)
#define BIN_OFFSET      (3072)
#define SD_BIN_OFFSET   (1024)
#define BIN_OFFSET2     (BIN_OFFSET+SD_BIN_OFFSET)/* 此宏指明是否打印u-boot.imx的IVT DCD表信息，不同的开发板其IVT和DCD* 表的数据是不同的，因此需要获取所使用的开发板的IVT和DCD表信息，最* 简单的方法就是读取开发板配套资料里面的u-boot.imx的前1KB数据，理论上* 应该读取3KB的数据，但是表信息远远没有3K这么多，因此读1KB即可 */
#define PRINT_TAB       0   
/** 介绍： 此软件是针对NXP的IMX6U系列芯片的，软件用来烧写bin文件到SD卡里面，*        本软件会自动添加IVT、DCD等信息到原始的bin文件里面，主要用于裸机和uboot的烧写。* 使用方法： 1、编译好原始的二进制bin文件，如，u-boot.bin等，并将编译好的.bin文件和本*             软件放置到同一个目录下！！！！*          2、执行命令sudo ./imxdownload <soucre_bin> <sd_device>*             如烧写u-boot.bin到/dev/sdd中即可使用如下所示命令:*             sudo ./imxdownload u-boot.bin /dev/sdd*//** 输出一些信息*/
void message_print(void)
{   printf("I.MX6ULL bin merge software\r\n");printf("Edit by:trueLink\r\n");printf("Date:2022/11/26\r\n");printf("Version:V1.0\r\n");printf("log:V1.0 initial version,support 256MB、512MB DDR3\r\n");
}int main(int argc, char *argv[])
{FILE *fp;unsigned char *buf,*buf2;unsigned char *cmdbuf;int nbytes, filelen;int i = 0, j = 0;int ddrsize = 0; /* 0为512MB，1为256MB，2为128MB...... */message_print();if((argc != 2) && (argc != 3)){printf("Error Usage! Reference Below:\r\n");printf("sudo ./%s <-512m or -256m> <source_bin> \r\n", argv[0]);return -1;}/* 查找参数，获取DDR容量 */for(i = 0; i < argc; i++){char *param = argv[i];if(param[0] != '-')continue;if(strcmp(param, "-256m") == 0)         /* 256MB */ddrsize = 1;else if(strcmp(param, "-512m") == 0)    /* 512MB */ddrsize = 0;}if(argc == 2)   /* 三个参数，也就是不输入DDR容量的话默认为512MB */ddrsize = 0;/* 打开bin文件 */fp = fopen(argv[1], "rb"); /* 以二进制只读方式打开bin文件 */if(fp == NULL){printf("Can't Open file %s\r\n", argv[1]);return -1;}/* 获取bin文件长度 */fseek(fp, 0L, SEEK_END);filelen = ftell(fp);fseek(fp, 0L, SEEK_SET);printf("file %s size = %dBytes\r\n", argv[1], filelen);/* 读取bin文件到缓冲区buf中 */buf = malloc(filelen + BIN_OFFSET);if(buf == NULL){printf("Mem Malloc Failed!\r\n");free(buf);fclose(fp);return -1;}memset(buf, 0, filelen + BIN_OFFSET); /* 清零 *//* 读取bin源码文件 */fread(buf + BIN_OFFSET, 1, filelen, fp);/* 关闭文件 *///fclose(fp);       //buf2//buf2///buf2 = malloc(filelen + BIN_OFFSET2);if(buf2 == NULL){printf("Mem Malloc Failed!\r\n");free(buf2);fclose(fp);return -1;}memset(buf2, 0, filelen + BIN_OFFSET2); /* 清零 *//* 复制bin源码文件 */memcpy(buf2 + BIN_OFFSET2, buf + BIN_OFFSET, filelen);/* 关闭文件 */fclose(fp);#if PRINT_TABprintf("IVT DCD Table:\r\n");for(i = 0; i < 1024/32; i++){for(j = 0; j < 8; j++){printf("0X%08X,",*(int *)(buf + BIN_OFFSET + (((i * 8) + j) * 4)));}printf("\r\n");}   free(buf);return 0;
#endif/* 添加IVT DCD等表信息到bin文件里面 */if(ddrsize == 0) {      /* 512MB */printf("Board DDR SIZE: 512MB\r\n");memcpy(buf, imx6_512mb_ivtdcd_table, sizeof(imx6_512mb_ivtdcd_table));}else if (ddrsize == 1) {    /* 256MB */printf("Board DDR SIZE: 256MB\r\n");memcpy(buf, imx6_256mb_ivtdcd_table, sizeof(imx6_256mb_ivtdcd_table));}/* 现在我们已经在buf中构建好了可以用于下载的bin文件，将buf中的数据保存到* 到一个文件中，文件命名为load.imx*/printf("Delete Old load.imx\r\n");system("rm -rf load.imx");      /* 先删除旧的load.imx文件  */printf("Create New load.imx\r\n");system("touch load.imx");       /* 创建新的load.imx文件       */fp = fopen("load.imx", "wb");   /* 打开laod.imx               */if(fp == NULL){printf("Cant't Open load.imx!!!\r\n");free(buf);fclose(fp);return -1;}nbytes = fwrite(buf, 1, filelen + BIN_OFFSET, fp);if(nbytes != (filelen + BIN_OFFSET)){printf("File Write Error!\r\n");free(buf);fclose(fp);return -1;}printf("load.imx is complete.\r\n");free(buf);fclose(fp); //buf2////* 添加IVT DCD等表信息到bin文件里面 */if(ddrsize == 0) {      /* 512MB */printf("Board DDR SIZE: 512MB\r\n");memcpy(buf2+SD_BIN_OFFSET, imx6_512mb_ivtdcd_table, sizeof(imx6_512mb_ivtdcd_table));}else if (ddrsize == 1) {    /* 256MB */printf("Board DDR SIZE: 256MB\r\n");memcpy(buf2+SD_BIN_OFFSET, imx6_256mb_ivtdcd_table, sizeof(imx6_256mb_ivtdcd_table));}//新建一个可直接烧录到SD的bin文件  load.binprintf("Delete Old load.img\r\n");system("rm -rf load.img");      /* 先删除旧的load.img    */printf("Create New load.img\r\n");system("touch load.img");       /* 创建新的load.img     */fp = fopen("load.img", "wb");   /* 打开laod.img               */if(fp == NULL){printf("Cant't Open load.img!!!\r\n");free(buf2);fclose(fp);return -1;}nbytes = fwrite(buf2, 1, filelen + BIN_OFFSET2, fp);if(nbytes != (filelen + BIN_OFFSET2)){printf("File Write Error!\r\n");free(buf2);fclose(fp);return -1;}printf("load.bin is complete.\r\n");free(buf2);fclose(fp);     //屏蔽烧录命令/* 构建烧写的shell命令 */// cmdbuf = malloc(SHELLCMD_LEN);// sprintf(cmdbuf, "sudo dd iflag=dsync oflag=dsync if=load.imx of=%s bs=512 seek=2",argv[2]);  // printf("Download load.imx to %s  ......\r\n", argv[2]);// /* 执行上面的shell命令 */// system(cmdbuf);// free(cmdbuf);return 0;   
}

imxdownload.h (未修改正点原子官方.h文件)

#ifndef _IMXDOWNLOAD_H
#define _IMXDOWNLOAD_H
/* IMX6U IVT DCD表信息  暂时定义为1K Bytes，此表是读取的u-boot.imx前1K Bytes* imx6_ivedcd_table[9]是指明代码长度的，本应该根据实际的代码长度来修改* 这里为了方便，就直接定义为2M Bytes，即*/const int imx6_512mb_ivtdcd_table[256] = {
0X402000D1,0X87800000,0X00000000,0X877FF42C,0X877FF420,0X877FF400,0X00000000,0X00000000,
0X877FF000,0X00200000,0X00000000,0X40E801D2,0X04E401CC,0X68400C02,0XFFFFFFFF,0X6C400C02,
0XFFFFFFFF,0X70400C02,0XFFFFFFFF,0X74400C02,0XFFFFFFFF,0X78400C02,0XFFFFFFFF,0X7C400C02,
0XFFFFFFFF,0X80400C02,0XFFFFFFFF,0XB4040E02,0X00000C00,0XAC040E02,0X00000000,0X7C020E02,
0X30000000,0X50020E02,0X30000000,0X4C020E02,0X30000000,0X90040E02,0X30000000,0X88020E02,
0X30000C00,0X70020E02,0X00000000,0X60020E02,0X30000000,0X64020E02,0X30000000,0XA0040E02,
0X30000000,0X94040E02,0X00000200,0X80020E02,0X30000000,0X84020E02,0X30000000,0XB0040E02,
0X00000200,0X98040E02,0X30000000,0XA4040E02,0X30000000,0X44020E02,0X30000000,0X48020E02,
0X30000000,0X1C001B02,0X00800000,0X00081B02,0X030039A1,0X0C081B02,0X0B000300,0X3C081B02,
0X44014801,0X48081B02,0X302C4040,0X50081B02,0X343E4040,0X1C081B02,0X33333333,0X20081B02,
0X33333333,0X2C081B02,0X333333F3,0X30081B02,0X333333F3,0XC0081B02,0X09409400,0XB8081B02,
0X00080000,0X04001B02,0X2D000200,0X08001B02,0X3030331B,0X0C001B02,0XF3526B67,0X10001B02,
0X630B6DB6,0X14001B02,0XDB00FF01,0X18001B02,0X40172000,0X1C001B02,0X00800000,0X2C001B02,
0XD2260000,0X30001B02,0X23106B00,0X40001B02,0X4F000000,0X00001B02,0X00001884,0X90081B02,
0X00004000,0X1C001B02,0X32800002,0X1C001B02,0X33800000,0X1C001B02,0X31800400,0X1C001B02,
0X30802015,0X1C001B02,0X40800004,0X20001B02,0X00080000,0X18081B02,0X27020000,0X04001B02,
0X2D550200,0X04041B02,0X06100100,0X1C001B02,0X00000000,0X00000000,0X00000000,0X00000000,
0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,
0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,
0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,
0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,
0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,
0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,
0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,
0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,
0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,
0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,
0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,
0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,
0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,
0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,
0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,0X00000000
};const int imx6_256mb_ivtdcd_table[256] = {
0X402000D1,0X87800000,0X00000000,0X877FF42C,0X877FF420,0X877FF400,0X00000000,0X00000000,
0X877FF000,0X00076000,0X00000000,0X40E801D2,0X04E401CC,0X68400C02,0XFFFFFFFF,0X6C400C02,
0XFFFFFFFF,0X70400C02,0XFFFFFFFF,0X74400C02,0XFFFFFFFF,0X78400C02,0XFFFFFFFF,0X7C400C02,
0XFFFFFFFF,0X80400C02,0XFFFFFFFF,0XB4040E02,0X00000C00,0XAC040E02,0X00000000,0X7C020E02,
0X30000000,0X50020E02,0X30000000,0X4C020E02,0X30000000,0X90040E02,0X30000000,0X88020E02,
0X30000C00,0X70020E02,0X00000000,0X60020E02,0X30000000,0X64020E02,0X30000000,0XA0040E02,
0X30000000,0X94040E02,0X00000200,0X80020E02,0X30000000,0X84020E02,0X30000000,0XB0040E02,
0X00000200,0X98040E02,0X30000000,0XA4040E02,0X30000000,0X44020E02,0X30000000,0X48020E02,
0X30000000,0X1C001B02,0X00800000,0X00081B02,0X030039A1,0X0C081B02,0X04000000,0X3C081B02,
0X3C013C01,0X48081B02,0X38324040,0X50081B02,0X28304040,0X1C081B02,0X33333333,0X20081B02,
0X33333333,0X2C081B02,0X333333F3,0X30081B02,0X333333F3,0XC0081B02,0X09409400,0XB8081B02,
0X00080000,0X04001B02,0X2D000200,0X08001B02,0X3030331B,0X0C001B02,0XF352433F,0X10001B02,
0X630B6DB6,0X14001B02,0XDB00FF01,0X18001B02,0X40172000,0X1C001B02,0X00800000,0X2C001B02,
0XD2260000,0X30001B02,0X23104300,0X40001B02,0X47000000,0X00001B02,0X00001883,0X90081B02,
0X00004000,0X1C001B02,0X32800002,0X1C001B02,0X33800000,0X1C001B02,0X31800400,0X1C001B02,
0X30802015,0X1C001B02,0X40800004,0X20001B02,0X00080000,0X18081B02,0X27020000,0X04001B02,
0X2D550200,0X04041B02,0X06100100,0X1C001B02,0X00000000,0X00000000,0X00000000,0X00000000,
0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,
0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,
0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,
0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,
0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,
0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,
0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,
0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,
0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,
0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,
0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,
0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,
0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,
0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,
0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,0X00000000,
};#endif

1、修改程序后再WLS上编译出新的imxdownload执行文件，

gcc imxdownload.c -o imxdownload2 

修改后的文件可在此处下载： 【免费】imxdownload修改文件资源-CSDN文库

2、 把imxdownload2复制到需要烧录的工程下

执行：

./imxdownload2 led.bin

注：led.bin是工程中需要的.bin文件

        此时，生成了.imx (可在Linux下用dd命令烧录), img (可在windows下用Win32DiskImager烧录SD卡)。load.img的内容是在load.imx基础上偏移了1K 字节，这样可以直接烧录到SD卡。

3、Win32DiskImager烧录SD卡

使用Win32DiskImager打开需要烧录的.imx文件进行，点击“写入”即可。

写入成功后将SD卡插回开发板上，选择SD卡启动，程序成功运行。

上述方法简单好用对新手友好，但多了一步烧录的步骤，如果觉得繁琐可以参考

解决WSL烧录SD卡问题_wsl如何连接sd卡-CSDN博客文章，可以利用命令在WLS上直接调用Windows上的软件进行烧录。

如果想在WLS上识别到SD卡，可参考下面文章进行设置。

WSL2连接USB存储设备（保姆级教程，真正做到你奶奶来了也能成功）_wsl2 usb-CSDN博客

参考文献：

WSL2编译IMX6ULL裸机程序烧录至SD卡_wsl u盘 /dev/sd-CSDN博客