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// Example snippet from dram_paras.c for A133 static struct dram_para dram_para = .clk = 792, // DRAM frequency in MHz .type = 7, // 7 = LPDDR3, 8 = DDR4 .zq = 0x3f3f, // Impedance calibration .odt_en = 0x1, // Enable ODT ;
I can provide the exact step-by-step recovery process for your situation. allwinner+a133+firmware+work
make CROSS_COMPILE=aarch64-linux-gnu- orangepi_zero2_defconfig # Note: A133 shares configs with H616 often make menuconfig CROSS_COMPILE=aarch64-linux-gnu- # Enable bootstage, disable CONFIG_SPL_SYS_THUMB_BUILD for stability make // Example snippet from dram_paras
: The sunxi-fel tool's uboot command can upload the SPL (Secondary Program Loader) and U-Boot proper, but it relies on versions of U-Boot that can return to FEL mode after initializing the DRAM. // 7 = LPDDR3
// Example snippet from dram_paras.c for A133 static struct dram_para dram_para = .clk = 792, // DRAM frequency in MHz .type = 7, // 7 = LPDDR3, 8 = DDR4 .zq = 0x3f3f, // Impedance calibration .odt_en = 0x1, // Enable ODT ;
I can provide the exact step-by-step recovery process for your situation.
make CROSS_COMPILE=aarch64-linux-gnu- orangepi_zero2_defconfig # Note: A133 shares configs with H616 often make menuconfig CROSS_COMPILE=aarch64-linux-gnu- # Enable bootstage, disable CONFIG_SPL_SYS_THUMB_BUILD for stability make
: The sunxi-fel tool's uboot command can upload the SPL (Secondary Program Loader) and U-Boot proper, but it relies on versions of U-Boot that can return to FEL mode after initializing the DRAM.
