First attempt to add support to ESP32.

Signed-off-by: Pol Henarejos <pol.henarejos@cttc.es>

CMakeLists.txt

@@ -17,6 +17,14 @@
 
 cmake_minimum_required(VERSION 3.13)
 
+if(ESP_PLATFORM)
+set(EXTRA_COMPONENT_DIRS src pico-keys-sdk/src)
+include($ENV{IDF_PATH}/tools/cmake/project.cmake)
+set(USB_VID 0x20a0)
+set(USB_PID 0x4230)
+set(DEBUG_APDU 1)
+set(USB_ITF_CCID 1)
+else()
 if(ENABLE_EMULATION)
 else()
 include(pico_sdk_import.cmake)
@@ -27,8 +35,7 @@ project(pico_hsm C CXX ASM)
 set(CMAKE_C_STANDARD 11)
 set(CMAKE_CXX_STANDARD 17)
 
-if(ENABLE_EMULATION)
-else()
+if(NOT ENABLE_EMULATION)
 pico_sdk_init()
 endif()
 
@@ -40,7 +47,7 @@ if (__FOR_CI)
 endif()
 
 add_executable(pico_hsm)
-
+endif()
 set(SOURCES ${SOURCES}
         ${CMAKE_CURRENT_LIST_DIR}/src/hsm/sc_hsm.c
         ${CMAKE_CURRENT_LIST_DIR}/src/hsm/cmd_select.c
@@ -77,11 +84,14 @@ set(SOURCES ${SOURCES}
         )
 set(USB_ITF_CCID 1)
 include(pico-keys-sdk/pico_keys_sdk_import.cmake)
+if(ESP_PLATFORM)
+    project(pico_hsm)
+endif()
 
 set(INCLUDES ${INCLUDES}
         ${CMAKE_CURRENT_LIST_DIR}/src/hsm
         )
-
+if(NOT ESP_PLATFORM)
 target_sources(pico_hsm PUBLIC ${SOURCES})
 target_include_directories(pico_hsm PUBLIC ${INCLUDES})
 
@@ -120,3 +130,4 @@ else()
 pico_add_extra_outputs(pico_hsm)
 target_link_libraries(pico_hsm PRIVATE pico_keys_sdk pico_stdlib pico_multicore hardware_flash hardware_sync hardware_adc pico_unique_id hardware_rtc tinyusb_device tinyusb_board)
 endif()
+endif()