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Diffstat (limited to 'README.org')
| -rw-r--r-- | README.org | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/README.org b/README.org new file mode 100644 index 0000000..03c8939 --- /dev/null +++ b/README.org @@ -0,0 +1,15 @@ +looks like the start board is a gd32vf103cbt from the tiny print silk-screened on the chip. + +which means it has 128k flash and 32k sram and 37(!) gpio pins + +| area | start | end | +|-------------+-------------+-------------| +| sram region | ~0x2000_0000~ | ~0x2001_7fff~ | +| boot loader | ~0x1fff_b000~ | ~0x1fff_f7ff~ | +| main flash | ~0x0800_0000~ | ~0x0801_ffff~ | + +interrupt vector table is 4096 words starting from the start of flash (~mtvt~ register). ~_start~ should be at the end of the vector. + +according to the user manual (pg 51), at least when waking up, the system boots from ~0x0000_0000~ (which is an alias to the start of the main flash, iirc) + +usb is 2.0 full-speed (12Mbps) |