DHCP and TFTP

[Jim Schaettle]

Hello! I have U-Boot installed on the SD card of my Orange Pi. It works great, using SRVLOC to get the address of the server, DHCP to get an IP address, and TFTP to get the application files.

I also have a rack of 48 Orange Pi devices with the same U-Boot code in their SD cards. They all have a common power supply. When they boot, sometimes do_pxe() runs before net_ip is set. (There are many devices trying to get IP addresses.)

I have my own copy of the U-Boot code. Is there an environment variable that I can set, or a code change that I can make? For example:

static int do_pxe(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[]) {
      struct cmd_tbl *cp;

      if (net_ip.s_addr == 0) {
              // now what?
      }
      ...

Do you have any ideas? Thank you!

Jim Schaettle