diff --git a/examples/coremark/platformio.ini b/examples/coremark/platformio.ini
index e82a4e8..3777076 100644
--- a/examples/coremark/platformio.ini
+++ b/examples/coremark/platformio.ini
@@ -67,14 +67,21 @@ build_flags = ${common.300_flags} -DITERATIONS=4000
 
 [env:gd32vf103v_rvstar]
 board = gd32vf103v_rvstar
+board_build.sysclk = 96000000
+board_build.clksrc = hxtal
+board_build.stdclib = libncrt_small
 build_flags = ${common.200_flags} -DITERATIONS=4000
 
 [env:gd32vf103v_eval]
 board = gd32vf103v_eval
+board_build.sysclk = 108000000
+board_build.clksrc = hxtal
 build_flags = ${common.200_flags} -DITERATIONS=4000
 
 [env:gd32vf103c_longan_nano]
 board = gd32vf103c_longan_nano
+board_build.sysclk = 72000000
+board_build.clksrc = irc8m
 build_flags = ${common.200_flags} -DITERATIONS=4000
 
 [env:gd32vf103c_longan_nano_lite]
diff --git a/examples/cpuinfo/platformio.ini b/examples/cpuinfo/platformio.ini
index db67fd1..5d41340 100644
--- a/examples/cpuinfo/platformio.ini
+++ b/examples/cpuinfo/platformio.ini
@@ -18,21 +18,33 @@ monitor_speed = 115200
 
 [env:nuclei_fpga_eval]
 board = nuclei_fpga_eval
-board_build.download = ilm
+board_build.download = flashxip
+board_build.stdclib = libncrt_small
 
 [env:gd32vw553h_eval]
 board = gd32vw553h_eval
 # Changed to use sram download mode
-board_build.download = sram
+board_build.download = flashxip
+board_build.stdclib = libncrt_nano
+board_build.clksrc = hxtal
 
 [env:gd32vf103v_rvstar]
 board = gd32vf103v_rvstar
+board_build.sysclk = 108000000
+board_build.clksrc = hxtal
+board_build.stdclib = libncrt_small
 
 [env:gd32vf103v_eval]
 board = gd32vf103v_eval
+board_build.sysclk = 96000000
+board_build.clksrc = hxtal
+board_build.stdclib = libncrt_fast
 
 [env:gd32vf103c_longan_nano]
 board = gd32vf103c_longan_nano
+board_build.sysclk = 96000000
+board_build.clksrc = hxtal
+board_build.stdclib = libncrt_balanced
 
 [env:gd32vf103c_longan_nano_lite]
 board = gd32vf103c_longan_nano
diff --git a/examples/demo_dsp/platformio.ini b/examples/demo_dsp/platformio.ini
index b131115..b6d6aa5 100644
--- a/examples/demo_dsp/platformio.ini
+++ b/examples/demo_dsp/platformio.ini
@@ -23,11 +23,12 @@ board_build.download = ilm
 board_build.core = n307fd
 board_build.nmsis_lib_arch = rv32imafdc
 build_flags = 
+board_build.stdclib = libncrt_small
 
 [env:gd32vw553h_eval]
 board = gd32vw553h_eval
 # Changed to use sram download mode
-board_build.download = sram
+board_build.download = flashxip
 # you can change to use different toolchain
 board_build.toolchain = nuclei_gnu
 board_build.arch_ext = _zba_zbb_zbc_zbs_xxldspn1x
@@ -38,6 +39,7 @@ build_flags =
 [env:gd32vf103v_rvstar]
 board = gd32vf103v_rvstar
 build_flags =
+board_build.stdclib = libncrt_fast
 
 [env:gd32vf103v_eval]
 board = gd32vf103v_eval
diff --git a/examples/demo_eclic/platformio.ini b/examples/demo_eclic/platformio.ini
index c517334..d36c0a2 100644
--- a/examples/demo_eclic/platformio.ini
+++ b/examples/demo_eclic/platformio.ini
@@ -26,12 +26,17 @@ board_build.download = ilm
 board = gd32vw553h_eval
 # Changed to use sram download mode
 board_build.download = sram
+board_build.sysclk = 48000000
+board_build.clksrc = irc16m
+board_build.stdclib = libncrt_small
 
 [env:gd32vf103v_rvstar]
 board = gd32vf103v_rvstar
+board_build.stdclib = libncrt_nano
 
 [env:gd32vf103v_eval]
 board = gd32vf103v_eval
+board_build.stdclib = newlib_fast
 
 [env:gd32vf103c_longan_nano]
 board = gd32vf103c_longan_nano
diff --git a/examples/demo_nice/platformio.ini b/examples/demo_nice/platformio.ini
index 06cd5a7..d7c1094 100644
--- a/examples/demo_nice/platformio.ini
+++ b/examples/demo_nice/platformio.ini
@@ -20,4 +20,5 @@ monitor_speed = 115200
 
 [env:nuclei_fpga_eval]
 board = nuclei_fpga_eval
-board_build.download = ilm
\ No newline at end of file
+board_build.download = flash
+board_build.stdclib = newlib_fast
diff --git a/examples/demo_timer/platformio.ini b/examples/demo_timer/platformio.ini
index ec92897..5eab6cc 100644
--- a/examples/demo_timer/platformio.ini
+++ b/examples/demo_timer/platformio.ini
@@ -24,6 +24,7 @@ board_build.download = ilm
 board = gd32vw553h_eval
 # Changed to use sram download mode
 board_build.download = sram
+board_build.stdclib = libncrt_small
 
 [env:gd32vf103v_rvstar]
 board = gd32vf103v_rvstar
diff --git a/examples/dhrystone/platformio.ini b/examples/dhrystone/platformio.ini
index 461bd93..a5cd9af 100644
--- a/examples/dhrystone/platformio.ini
+++ b/examples/dhrystone/platformio.ini
@@ -30,14 +30,18 @@ build_flags = ${common.compile_flags}
 board = nuclei_fpga_eval
 # Changed to use ilm download mode
 board_build.download = ilm
+board_build.core = n300f
+board_build.stdclib = newlib_small
 
 [env:gd32vw553h_eval]
 board = gd32vw553h_eval
 # Changed to use sram download mode
 board_build.download = sram
+board_build.stdclib = newlib_small
 
 [env:gd32vf103v_rvstar]
 board = gd32vf103v_rvstar
+board_build.stdclib = libncrt_small
 
 [env:gd32vf103v_eval]
 board = gd32vf103v_eval
diff --git a/examples/freertos_demo/platformio.ini b/examples/freertos_demo/platformio.ini
index b65540b..65b8951 100644
--- a/examples/freertos_demo/platformio.ini
+++ b/examples/freertos_demo/platformio.ini
@@ -21,6 +21,8 @@ board_build.rtos = freertos
 [env:nuclei_fpga_eval]
 board = nuclei_fpga_eval
 board_build.download = ilm
+board_build.core = n300
+board_build.arch_ext = _zba_zbb_zbc_zbs
 
 [env:gd32vw553h_eval]
 board = gd32vw553h_eval
diff --git a/examples/helloworld/platformio.ini b/examples/helloworld/platformio.ini
index f1559f6..21ab9c3 100644
--- a/examples/helloworld/platformio.ini
+++ b/examples/helloworld/platformio.ini
@@ -18,10 +18,12 @@ monitor_speed = 115200
 
 [env:nuclei_fpga_eval]
 board = nuclei_fpga_eval
-board_build.download = ilm
+board_build.download = flashxip
+board_build.stdclib = newlib_nano
 
 [env:gd32vf103v_rvstar]
 board = gd32vf103v_rvstar
+board_build.stdclib = newlib_small
 
 [env:gd32vf103v_eval]
 board = gd32vf103v_eval
diff --git a/examples/rtthread_demo/platformio.ini b/examples/rtthread_demo/platformio.ini
index 023f620..a453243 100644
--- a/examples/rtthread_demo/platformio.ini
+++ b/examples/rtthread_demo/platformio.ini
@@ -24,12 +24,15 @@ debug_build_flags = -O3 -g
 [env:nuclei_fpga_eval]
 board = nuclei_fpga_eval
 board_build.download = ilm
-board_build.core = n305
+board_build.core = n307
+board_build.stdclib = newlib_small
 
 [env:gd32vw553h_eval]
 board = gd32vw553h_eval
 # Changed to use sram download mode
 board_build.download = sram
+board_build.sysclk = 48000000
+board_build.clksrc = irc16m
 
 [env:gd32vf103v_rvstar]
 board = gd32vf103v_rvstar
diff --git a/examples/rtthread_msh/platformio.ini b/examples/rtthread_msh/platformio.ini
index 7c2812b..22da7c5 100644
--- a/examples/rtthread_msh/platformio.ini
+++ b/examples/rtthread_msh/platformio.ini
@@ -24,7 +24,7 @@ build_flags = -O3
 [env:nuclei_fpga_eval]
 board = nuclei_fpga_eval
 board_build.download = ilm
-board_build.core = n305
+board_build.core = n900fd
 
 [env:gd32vw553h_eval]
 board = gd32vw553h_eval
diff --git a/examples/smphello/platformio.ini b/examples/smphello/platformio.ini
index 1a6abba..6ee1871 100644
--- a/examples/smphello/platformio.ini
+++ b/examples/smphello/platformio.ini
@@ -18,10 +18,10 @@ monitor_speed = 115200
 
 [env:nuclei_fpga_eval]
 board = nuclei_fpga_eval
-board_build.core = nx900fd
+board_build.core = nx900f
 board_build.download = sram
 board_build.smp = 4
 board_build.stacksz = 4k
 board_build.heapsz = 2k
-board_build.boot_hartid = 0
+board_build.boot_hartid = 1
 
diff --git a/examples/ucosii_demo/platformio.ini b/examples/ucosii_demo/platformio.ini
index cbfb0d8..1bc08a7 100644
--- a/examples/ucosii_demo/platformio.ini
+++ b/examples/ucosii_demo/platformio.ini
@@ -20,10 +20,14 @@ board_build.rtos = ucosii
 
 [env:nuclei_fpga_eval]
 board = nuclei_fpga_eval
+board_build.download = ilm
+board_build.core = n200
 
 [env:gd32vw553h_eval]
 board = gd32vw553h_eval
 # Changed to use sram download mode
+board_build.core = n300f
+board_build.arch_ext =
 board_build.download = sram
 
 [env:gd32vf103v_rvstar]
diff --git a/examples/whetstone/platformio.ini b/examples/whetstone/platformio.ini
index a15fe15..1927242 100644
--- a/examples/whetstone/platformio.ini
+++ b/examples/whetstone/platformio.ini
@@ -26,6 +26,7 @@ build_flags = ${common.compile_flags}
 board = nuclei_fpga_eval
 # Changed to use ilm download mode
 board_build.download = ilm
+board_build.core = n300f
 
 [env:gd32vw553h_eval]
 board = gd32vw553h_eval