riscv32imac-musl toolchain

Compiled from riscv-gnu-toolchain w/ soft float support. Tested on Ubuntu 24.04 amd64

initial

Flash command

esptool  -b 2000000 \
  0x2000 bootloader.bin \
  0x8000 partition-table.bin \
  0x20000 hello_world.bin \
  0x220000 fw_payload.bin \
  0x2A0000 xipImage \
  0xA20000 initramfs.cpio

Choose one b/w initramfs.cpio and initramfs_full.cpio.

• initramfs: bare minimal busybox
• initramfs_full: most busybox applets + coremark