@evanh said:
The only way to use a SD card, and not be constantly removing it, and also develop new code via serial booting is to have a loader in the EEPROM. Thereby entirely bypassing the ROM's SD boot solution.
I usually just set the pullup for the long serial window. Forget which one that was. That will never auto-boot anything, but that's usually desireable.
P59 pull-up forces serial only booting. P59 pull-down forces no serial booting.
Yeah, I suppose that is an option: Boot from serial as a loader until happy with finished product, then put the loader on the SD card and make it bootable.
You do know that's a work-around, right? You're overpowering the incorrectly wired pull-down that should be a pull-up. I expect you to correct the schematic and fix the already made modules in the medium term.
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P59 pull-up forces serial only booting. P59 pull-down forces no serial booting.
Yeah, I suppose that is an option: Boot from serial as a loader until happy with finished product, then put the loader on the SD card and make it bootable.
@evanh Looks like that was it...
FatFS works from boot with this change to line 550 in sdmm.cc:
//spm_rx |= P_SYNC_RX | P_OE | P_INVERT_OUTPUT | P_HIGH_15K | P_LOW_15K; // rx smartpin mode, with 15 k pull-up spm_rx |= P_SYNC_RX | P_OE | P_INVERT_OUTPUT | P_HIGH_1MA | P_LOW_FLOAT; // pull-upYou do know that's a work-around, right? You're overpowering the incorrectly wired pull-down that should be a pull-up. I expect you to correct the schematic and fix the already made modules in the medium term.