Add AiThinker Cam board

[just-jason]

Would it be possible to add a board definition for the AiThinker Cam board with PSRAM.?

[Niek]

I have tried to flash to this board, but I keep getting errors when booting. I understand that the esp32wrover board should work since it has PSRAM:

$ make -f ~/makeEspArduino/makeEspArduino.mk ESP_ROOT=~/arduino-esp32 CHIP=esp32 BOARD=esp32wrover UPLOAD_PORT=/dev/tty.usbserial erase_flash flash

Flashing is OK, but while booting I get a bootloop like this:

rst:0x3 (SW_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)
configsip: 0, SPIWP:0xee
clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
mode:DIO, clock div:2
load:0x3fff0018,len:4
load:0x3fff001c,len:928
ho 0 tail 12 room 4
load:0x40078000,len:9280
load:0x40080400,len:5860
entry 0x40080698
ets Jun  8 2016 00:22:57

This message repeats over and over.

[me-no-dev]

Yes, what you are getting is not normal. Try to set pins 13 and 14 as INPUT_PULLUP as first lines on your code. I do not guarantee that it will work, but you can try.

[Niek]

Adding this to the top of the setup() function doesn't do anything for me:

pinMode(13, INPUT_PULLUP);
pinMode(14, INPUT_PULLUP);

[Niek]

I figured out the issue, the partition size was incorrect. Here is a boards.txt entry that works best for me:

esp32cam.name=AI Thinker ESP32-CAM

esp32cam.upload.tool=esptool_py
esp32cam.upload.maximum_size=3145728
esp32cam.upload.maximum_data_size=327680
esp32cam.upload.wait_for_upload_port=true
esp32cam.upload.speed=460800

esp32cam.serial.disableDTR=true
esp32cam.serial.disableRTS=true

esp32cam.build.mcu=esp32
esp32cam.build.core=esp32
esp32cam.build.variant=esp32
esp32cam.build.board=ESP32_DEV
esp32cam.build.f_cpu=240000000L
esp32cam.build.flash_size=4MB
esp32cam.build.flash_freq=80m
esp32cam.build.flash_mode=dio
esp32cam.build.boot=qio
esp32cam.build.partitions=huge_app
esp32cam.build.defines=-DBOARD_HAS_PSRAM -mfix-esp32-psram-cache-issue
esp32cam.build.code_debug=0

[Niek]

Created a PR: #2572

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