mimxrt1170_evkb: add M4 build support.

hw/bsp/imxrt/boards/mimxrt1170_evkb/board.cmake

@@ -1,8 +1,17 @@
 set(MCU_VARIANT MIMXRT1176)
-set(MCU_CORE _cm7)
 
-set(JLINK_DEVICE MIMXRT1176xxxA_M7)
-set(PYOCD_TARGET mimxrt1170_cm7)
+if (M4 STREQUAL "1")
+  set(MCU_CORE _cm4)
+  set(JLINK_CORE _M4)
+  set(LD_FILE_GNU ${SDK_DIR}/devices/${MCU_VARIANT}/gcc/${MCU_VARIANT}xxxxx${MCU_CORE}_ram.ld)
+  set(CMAKE_SYSTEM_PROCESSOR cortex-m4 CACHE INTERNAL "System Processor")
+else ()
+  set(MCU_CORE _cm7)
+  set(JLINK_CORE _M7)
+endif()
+
+set(JLINK_DEVICE MIMXRT1176xxxA${JLINK_CORE})
+set(PYOCD_TARGET mimxrt1170${MCU_CORE})
 set(NXPLINK_DEVICE MIMXRT1176xxxxx:MIMXRT1170-EVK)
 
 function(update_board TARGET)
@@ -10,7 +19,7 @@ function(update_board TARGET)
     ${CMAKE_CURRENT_FUNCTION_LIST_DIR}/evkbmimxrt1170_flexspi_nor_config.c
     )
   target_compile_definitions(${TARGET} PUBLIC
-    CPU_MIMXRT1176DVMAA_cm7
+    CPU_MIMXRT1176DVMAA${MCU_CORE}
     BOARD_TUD_RHPORT=0
     BOARD_TUH_RHPORT=1
     )

hw/bsp/imxrt/boards/mimxrt1170_evkb/board.mk

@@ -1,12 +1,22 @@
-CFLAGS += -DCPU_MIMXRT1176DVMAA_cm7
 MCU_VARIANT = MIMXRT1176
+
+ifeq ($(M4), 1)
+  MCU_CORE = _cm4
+  JLINK_CORE = _M4
+  CPU_CORE = cortex-m4
+  LD_FILE ?= $(MCU_DIR)/gcc/$(MCU_VARIANT)xxxxx${MCU_CORE}_ram.ld
+else
   MCU_CORE = _cm7
+  JLINK_CORE = _M7
+endif
+
+CFLAGS += -DCPU_MIMXRT1176DVMAA$(MCU_CORE)
 
 # For flash-jlink target
-JLINK_DEVICE = MIMXRT1176xxxA_M7
+JLINK_DEVICE = MIMXRT1176xxxA$(JLINK_CORE)
 
 # For flash-pyocd target
-PYOCD_TARGET = mimxrt1170_cm7
+PYOCD_TARGET = mimxrt1170$(MCU_CORE)
 
 BOARD_TUD_RHPORT = 0
 BOARD_TUH_RHPORT = 1

hw/bsp/imxrt/family.cmake

@@ -8,7 +8,9 @@ include(${CMAKE_CURRENT_LIST_DIR}/boards/${BOARD}/board.cmake)
 set(MCU_VARIANT_WITH_CORE ${MCU_VARIANT}${MCU_CORE})
 
 # toolchain set up
+if (NOT DEFINED CMAKE_SYSTEM_PROCESSOR)
   set(CMAKE_SYSTEM_PROCESSOR cortex-m7 CACHE INTERNAL "System Processor")
+endif ()
 set(CMAKE_TOOLCHAIN_FILE ${TOP}/examples/build_system/cmake/toolchain/arm_${TOOLCHAIN}.cmake)
 
 set(FAMILY_MCUS MIMXRT1XXX CACHE INTERNAL "")
@@ -58,14 +60,21 @@ function(add_board_target BOARD_TARGET)
     endif()
   endforeach()
 
+
+  target_compile_definitions(${BOARD_TARGET} PUBLIC
+    __STARTUP_CLEAR_BSS
+    CFG_TUSB_MEM_SECTION=__attribute__\(\(section\(\"NonCacheable\"\)\)\)
+    )
+
+  if (NOT M4 STREQUAL "1")
     target_compile_definitions(${BOARD_TARGET} PUBLIC
       __ARMVFP__=0
       __ARMFPV5__=0
       XIP_EXTERNAL_FLASH=1
       XIP_BOOT_HEADER_ENABLE=1
-    __STARTUP_CLEAR_BSS
-    CFG_TUSB_MEM_SECTION=__attribute__((section("NonCacheable")))
       )
+  endif ()
+
   target_include_directories(${BOARD_TARGET} PUBLIC
     ${CMAKE_CURRENT_FUNCTION_LIST_DIR}/boards/${BOARD}
     ${CMAKE_CURRENT_FUNCTION_LIST_DIR}/boards/${BOARD}/board
@@ -140,6 +149,8 @@ function(family_configure_example TARGET RTOS)
   # Link dependencies
   target_link_libraries(${TARGET} PUBLIC board_${BOARD} ${TARGET}-tinyusb)
 
+  family_add_bin_hex(${TARGET})
+
   # Flashing
   family_flash_jlink(${TARGET})
   #family_flash_nxplink(${TARGET})

hw/bsp/imxrt/family.mk

@@ -8,14 +8,18 @@ CPU_CORE ?= cortex-m7
 MCU_VARIANT_WITH_CORE = ${MCU_VARIANT}${MCU_CORE}
 MCU_DIR = $(SDK_DIR)/devices/$(MCU_VARIANT)
 
+CFLAGS += \
+  -D__STARTUP_CLEAR_BSS \
+  -DCFG_TUSB_MCU=OPT_MCU_MIMXRT1XXX \
+  -DCFG_TUSB_MEM_SECTION='__attribute__((section("NonCacheable")))' \
+
+ifneq ($(M4), 1)
 CFLAGS += \
   -D__ARMVFP__=0 \
   -D__ARMFPV5__=0 \
-  -D__STARTUP_CLEAR_BSS \
   -DXIP_EXTERNAL_FLASH=1 \
-  -DXIP_BOOT_HEADER_ENABLE=1 \
-  -DCFG_TUSB_MCU=OPT_MCU_MIMXRT1XXX \
-  -DCFG_TUSB_MEM_SECTION=__attribute__((section("NonCacheable"))) \
+  -DXIP_BOOT_HEADER_ENABLE=1
+endif
 
 ifdef BOARD_TUD_RHPORT
 CFLAGS += -DBOARD_TUD_RHPORT=$(BOARD_TUD_RHPORT)