I'm running ubuntu 20.04 server (which uses u-boot v2021.01 with minor changes/enhancements)
fw_printenv doesn't seem to work -- it always comes up with a crc error (I haven't tried fw_setenv yet).
Is there a spec of how the environment works? I haven't seen one.
Without this patch, I get: Warning: Bad CRC, using default environment
The first environment variable has a "0x1" in front of it. When I apply this patch, things seem to work:
diff --git a/tools/env/fw_env.c b/tools/env/fw_env.c index 66cb9d2a..c85b471a 100644 --- a/tools/env/fw_env.c +++ b/tools/env/fw_env.c @@ -1457,8 +1457,8 @@ int fw_env_open(struct env_opts *opts) goto open_cleanup; }
- crc0 = crc32(0, (uint8_t *)environment.data, ENV_SIZE); - + crc0 = crc32(0, (uint8_t *) (environment.data + 1) , ENV_SIZE - 1);
But I'm not at the phase of doing fw_setenv (I would have used a newer u-boot, but I'm getting resets on bootup (it works on a vanilla 20.04 system).
marty marty