@whycanservice 应该是代理商的技术给的。后面给我我补丁，我打上了。重新制作了镜像 t507_h_linux_demo2.0_uart0.img ，烧录到TF卡，还是不能正常启动。
[108]HELLO! BOOT0 is starting! [111]BOOT0 commit : 100e431 [114]set pll start [116]periph0 has been enabled [119]set pll end [121]PMU: AXP858 [132]vaild para:1 select dram para0 [135]board init ok [137]debug:rtc h-m-s value:0x0 [140]DRAM BOOT DRIVE INFO: V0.648 [144]the chip id is 0x7c00 [146]chip id check OK [150]DRAM_VCC set to 1100 mv [158]read_calibration error [166]read_calibration error [174]read_calibration error [183]read_calibration error [191]read_calibration error [199]read_calibration error [207]read_calibration error [215]read_calibration error [223]read_calibration error [232]read_calibration error [234]retraining final error [245][AUTO DEBUG]32bit,1 ranks training success! [261]DRAM CLK =720 MHZ [263]DRAM Type =8 (3:DDR3,4:DDR4,7:LPDDR3,8:LPDDR4) [273]Actual DRAM SIZE =8192 M [276]DRAM SIZE =8192 MBytes, para1 = 311b, para2 = 20000000, dram_tpr13 = 6061 [291]Actual DRAM SIZE =8192 M [296]DRAM simple test FAIL-----fedcbe98 != fedcba98 at address 40000000请问 [296]DRAM simple test FAIL-----fedcbe98 != fedcba98 at address 40000000 这个大概是什么原因？我可以从tf卡启动吗？还是说必须要从emmc启动？