Xtensa
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Note: the ESP32 support is highly experimental and prone to be broken. This description is work in progress.
Building FPC
Preparations
So far Linux only
Install esp-idf and execute
source ~/eps/esp-idf/export.sh
to get the pathes and environment set (namely tools path and $IDF_PATH are needed)
Change into the fpc directory and run
make CPU_TARGET=xtensa OS_TARGET=freertos "CROSSOPT=-Cplx6 -XPxtensa-esp32-elf- -Cfhard" all FPC=fpc
to get FPC.
Create somewhere a hello world program, compile it with
fpc/compiler/xtensa/pp -Fu../rtl/units/xtensa-freertos/ -Tfreertos -Cawindowed -XPxtensa-esp32-elf- -al -O3 -Wpesp32 -Fl~/xtensa-esp32-elf-libs -Fl$HOME/.espressif/tools/xtensa-esp32-elf/esp-2019r2-8.2.0/xtensa-esp32-elf/xtensa-esp32-elf/lib/ hello
Get partition-table.bin and bootloader.bin from the hello_world example compiled above and copy them into the same dir as the compiled hello.bin
Flash with
esptool.py -p /dev/ttyUSB0 -b 460800 --before default_reset --after hard_reset --chip esp32 write_flash --flash_mode dio --flash_size detect --flash_freq 40m 0x1000 bootloader.bin 0x8000 partition-table.bin 0x10000 hello.bin
Monitor the output with:
idf_monitor.py --port /dev/ttyUSB0 hello.elf
