Merge pull request #2767 from cesanta/frdm-n94

FRDM-MCXN947

examples/nxp/frdm-mcxn947-make-baremetal-builtin/Makefile

@@ -0,0 +1,45 @@
+CFLAGS  = -W -Wall -Wextra -Werror -Wundef -Wshadow -Wdouble-promotion
+CFLAGS += -Wformat-truncation -fno-common # -Wconversion is not SDK-friendly
+CFLAGS += -g3 -Os -ffunction-sections -fdata-sections
+CFLAGS += -I. -Icmsis_core/CMSIS/Core/Include -Icmsis_mcu/devices/MCXN947/
+CFLAGS += -Icmsis_mcu/devices/MCXN947/drivers
+CFLAGS += -DCPU_MCXN947VDF -DCPU_MCXN947VDF_cm33 -DCPU_MCXN947VDF_cm33_core0
+CFLAGS += -mcpu=cortex-m33 -mthumb -mfloat-abi=hard -mfpu=fpv5-sp-d16 $(CFLAGS_EXTRA)
+CFLAGS += -Wno-old-style-declaration -Wno-unused-parameter # due to NXP FSL code
+
+LDSCRIPT = link.ld
+LDFLAGS ?= -T$(LDSCRIPT) -nostdlib -nostartfiles --specs nano.specs -lc -lgcc -Wl,--gc-sections -Wl,-Map=$@.map 
+
+SOURCES = main.c hal.c
+SOURCES += startup.c
+SOURCES += cmsis_mcu/devices/MCXN947/drivers/fsl_clock.c cmsis_mcu/devices/MCXN947/drivers/fsl_spc.c cmsis_mcu/devices/MCXN947/drivers/fsl_common_arm.c # NXP support files
+
+# Mongoose options are defined in mongoose_config.h
+SOURCES += mongoose.c net.c packed_fs.c
+
+# Example specific build options. See README.md
+CFLAGS += -DHTTP_URL=\"http://0.0.0.0/\" -DHTTPS_URL=\"https://0.0.0.0/\"
+
+ifeq ($(OS),Windows_NT)
+  RM = cmd /C del /Q /F /S
+else
+  RM = rm -rf
+endif
+
+all build example: firmware.bin
+
+firmware.bin: firmware.elf
+	arm-none-eabi-objcopy -O binary $< $@
+
+firmware.elf: cmsis_core cmsis_mcu $(SOURCES) hal.h link.ld Makefile
+	arm-none-eabi-gcc $(SOURCES) $(CFLAGS) $(LDFLAGS) -o $@
+	arm-none-eabi-size $@
+
+cmsis_core:     # ARM CMSIS core headers
+	git clone -q --depth 1 -b 5.9.0 https://github.com/ARM-software/CMSIS_5 $@
+cmsis_mcu:
+	wget -O $@.zip https://mcuxpresso.nxp.com/cmsis_pack/repo/NXP.MCXN947_DFP.17.0.0.pack
+	mkdir $@ && cd $@ && unzip -q ../$@.zip
+clean:
+	$(RM) firmware.* *.su cmsis_core cmsis_mcu *.zip
+

examples/nxp/frdm-mcxn947-make-baremetal-builtin/hal.c

@@ -0,0 +1,186 @@
+// Copyright (c) 2024 Cesanta Software Limited
+// All rights reserved
+
+#include "hal.h"
+
+static volatile uint64_t s_ticks;  // Milliseconds since boot
+void SysTick_Handler(void) {       // SyStick IRQ handler, triggered every 1ms
+  s_ticks++;
+}
+
+#if 0
+void mg_random(void *buf, size_t len) {  // Use on-board RNG
+  for (size_t n = 0; n < len; n += sizeof(uint32_t)) {
+    uint32_t r = rng_read();
+    memcpy((char *) buf + n, &r, n + sizeof(r) > len ? len - n : sizeof(r));
+  }
+}
+#endif
+
+uint64_t mg_millis(void) {  // Let Mongoose use our uptime function
+  return s_ticks;           // Return number of milliseconds since boot
+}
+
+void hal_init(void) {
+  clock_init();                            // Set system clock to SYS_FREQUENCY
+  SystemCoreClock = SYS_FREQUENCY;         // Update SystemCoreClock global var
+  SysTick_Config(SystemCoreClock / 1000);  // Sys tick every 1ms
+  // rng_init();  // TRNG is part of ELS and there is no info on that
+
+  uart_init(UART_DEBUG, 115200);  // Initialise UART
+  gpio_output(LED1);              // Initialise LED1
+  gpio_write(LED1, 1);
+  gpio_output(LED2);  // Initialise LED2
+  gpio_write(LED2, 1);
+  gpio_output(LED3);  // Initialise LED3
+  gpio_write(LED3, 1);
+  ethernet_init();  // Initialise Ethernet pins
+}
+
+#if defined(__ARMCC_VERSION)
+// Keil specific - implement IO printf redirection
+int fputc(int c, FILE *stream) {
+  if (stream == stdout || stream == stderr) uart_write_byte(UART_DEBUG, c);
+  return c;
+}
+#elif defined(__GNUC__)
+// ARM GCC specific. ARM GCC is shipped with Newlib C library.
+// Implement newlib syscalls:
+//      _sbrk() for malloc
+//      _write() for printf redirection
+//      the rest are just stubs
+#include <sys/stat.h>  // For _fstat()
+
+#if !defined(__MCUXPRESSO)
+uint32_t SystemCoreClock;
+// evaluate your use of Secure/non-Secure and modify accordingly
+void SystemInit(void) {  // Called automatically by startup code
+  SCB->CPACR |=
+#if 0
+      (3UL << 0 * 2) | (3UL << 1 * 2) |   // Enable PowerQuad (CPO/CP1)
+#endif
+      (3UL << 10 * 2) | (3UL << 11 * 2);  // Enable FPU
+  __DSB();
+  __ISB();
+  SYSCON->LPCAC_CTRL &= ~SYSCON_LPCAC_CTRL_DIS_LPCAC_MASK;  // enable LPCAC
+// Read TRM 36.1 and decide whether you really want to enable aGDET and dGDET
+#if 1
+  // Disable aGDET and dGDET
+  ITRC0->OUT_SEL[4][0] =
+      (ITRC0->OUT_SEL[4][0] & ~ITRC_OUTX_SEL_OUTX_SELY_OUT_SEL_IN9_SELn_MASK) |
+      (ITRC_OUTX_SEL_OUTX_SELY_OUT_SEL_IN9_SELn(0x2));
+  ITRC0->OUT_SEL[4][1] =
+      (ITRC0->OUT_SEL[4][1] & ~ITRC_OUTX_SEL_OUTX_SELY_OUT_SEL_IN9_SELn_MASK) |
+      (ITRC_OUTX_SEL_OUTX_SELY_OUT_SEL_IN9_SELn(0x2));
+  SPC0->ACTIVE_CFG |= SPC_ACTIVE_CFG_GLITCH_DETECT_DISABLE_MASK;
+  SPC0->GLITCH_DETECT_SC &= ~SPC_GLITCH_DETECT_SC_LOCK_MASK;
+  SPC0->GLITCH_DETECT_SC = 0x3C;
+  SPC0->GLITCH_DETECT_SC |= SPC_GLITCH_DETECT_SC_LOCK_MASK;
+  ITRC0->OUT_SEL[4][0] =
+      (ITRC0->OUT_SEL[4][0] & ~ITRC_OUTX_SEL_OUTX_SELY_OUT_SEL_IN0_SELn_MASK) |
+      (ITRC_OUTX_SEL_OUTX_SELY_OUT_SEL_IN0_SELn(0x2));
+  ITRC0->OUT_SEL[4][1] =
+      (ITRC0->OUT_SEL[4][1] & ~ITRC_OUTX_SEL_OUTX_SELY_OUT_SEL_IN0_SELn_MASK) |
+      (ITRC_OUTX_SEL_OUTX_SELY_OUT_SEL_IN0_SELn(0x2));
+  GDET0->GDET_ENABLE1 = 0;
+  GDET1->GDET_ENABLE1 = 0;
+#endif
+}
+#endif
+
+int _fstat(int fd, struct stat *st) {
+  (void) fd, (void) st;
+  return -1;
+}
+
+#if !defined(__MCUXPRESSO)
+extern unsigned char _end[];  // End of data section, start of heap. See link.ld
+static unsigned char *s_current_heap_end = _end;
+
+size_t hal_ram_used(void) {
+  return (size_t) (s_current_heap_end - _end);
+}
+
+size_t hal_ram_free(void) {
+  unsigned char endofstack;
+  return (size_t) (&endofstack - s_current_heap_end);
+}
+
+void *_sbrk(int incr) {
+  unsigned char *prev_heap;
+  unsigned char *heap_end = (unsigned char *) ((size_t) &heap_end - 256);
+  prev_heap = s_current_heap_end;
+  // Check how much space we  got from the heap end to the stack end
+  if (s_current_heap_end + incr > heap_end) return (void *) -1;
+  s_current_heap_end += incr;
+  return prev_heap;
+}
+#endif
+
+int _open(const char *path) {
+  (void) path;
+  return -1;
+}
+
+int _close(int fd) {
+  (void) fd;
+  return -1;
+}
+
+int _isatty(int fd) {
+  (void) fd;
+  return 1;
+}
+
+int _lseek(int fd, int ptr, int dir) {
+  (void) fd, (void) ptr, (void) dir;
+  return 0;
+}
+
+void _exit(int status) {
+  (void) status;
+  for (;;) asm volatile("BKPT #0");
+}
+
+void _kill(int pid, int sig) {
+  (void) pid, (void) sig;
+}
+
+int _getpid(void) {
+  return -1;
+}
+
+int _write(int fd, char *ptr, int len) {
+  (void) fd, (void) ptr, (void) len;
+  if (fd == 1) uart_write_buf(UART_DEBUG, ptr, (size_t) len);
+  return -1;
+}
+
+int _read(int fd, char *ptr, int len) {
+  (void) fd, (void) ptr, (void) len;
+  return -1;
+}
+
+int _link(const char *a, const char *b) {
+  (void) a, (void) b;
+  return -1;
+}
+
+int _unlink(const char *a) {
+  (void) a;
+  return -1;
+}
+
+int _stat(const char *path, struct stat *st) {
+  (void) path, (void) st;
+  return -1;
+}
+
+int mkdir(const char *path, mode_t mode) {
+  (void) path, (void) mode;
+  return -1;
+}
+
+void _init(void) {
+}
+#endif  // __GNUC__