revert to use __USE_LPCOPEN

properly init fpu on LPC M4

hw/bsp/ngx4330/board.mk

@@ -7,7 +7,7 @@ CFLAGS += \
   -mfpu=fpv4-sp-d16 \
   -nostdlib \
   -DCORE_M4 \
-  -D__USE_CMSIS \
+  -D__USE_LPCOPEN \
   -DCFG_TUSB_MCU=OPT_MCU_LPC43XX
 
 # mcu driver cause following warnings
@@ -24,7 +24,8 @@ SRC_C += \
 	$(MCU_DIR)/src/clock_18xx_43xx.c \
 	$(MCU_DIR)/src/gpio_18xx_43xx.c \
 	$(MCU_DIR)/src/sysinit_18xx_43xx.c \
-	$(MCU_DIR)/src/uart_18xx_43xx.c
+	$(MCU_DIR)/src/uart_18xx_43xx.c \
+	$(MCU_DIR)/src/fpu_init.c
 
 INC += \
 	$(TOP)/$(MCU_DIR)/inc \

hw/bsp/ngx4330/ngx4330.c

@@ -71,11 +71,17 @@ static const PINMUX_GRP_T pinmuxing[] =
 };
 
 // Invoked by startup code
-extern void (* const g_pfnVectors[])(void);
 void SystemInit(void)
 {
-  // Remap isr vector
-	*((uint32_t *) 0xE000ED08) = (uint32_t) &g_pfnVectors;
+#ifdef __USE_LPCOPEN
+	extern void (* const g_pfnVectors[])(void);
+  unsigned int *pSCB_VTOR = (unsigned int *) 0xE000ED08;
+	*pSCB_VTOR = (unsigned int) &g_pfnVectors;
+
+#if __FPU_USED == 1
+	fpuInit();
+#endif
+#endif // __USE_LPCOPEN
 
 	// Set up pinmux
 	Chip_SCU_SetPinMuxing(pinmuxing, sizeof(pinmuxing) / sizeof(PINMUX_GRP_T));