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https://github.com/cesanta/mongoose.git
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147 lines
3.5 KiB
C
147 lines
3.5 KiB
C
// Copyright (c) 2024 Cesanta Software Limited
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// All rights reserved
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#include "hal.h"
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static volatile uint64_t s_ticks; // Milliseconds since boot
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void SysTick_Handler(void) { // SyStick IRQ handler, triggered every 1ms
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s_ticks++;
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}
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void mg_random(void *buf, size_t len) { // Use on-board RNG
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for (size_t n = 0; n < len; n += sizeof(uint32_t)) {
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uint32_t r = rng_read();
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memcpy((char *) buf + n, &r, n + sizeof(r) > len ? len - n : sizeof(r));
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}
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}
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uint64_t mg_millis(void) { // Let Mongoose use our uptime function
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return s_ticks; // Return number of milliseconds since boot
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}
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void hal_init(void) {
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clock_init(); // Set system clock to SYS_FREQUENCY
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SystemCoreClock = SYS_FREQUENCY; // Update SystemCoreClock global var
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SysTick_Config(SystemCoreClock / 1000); // Sys tick every 1ms
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rng_init(); // Initialise random number generator
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uart_init(UART_DEBUG, 115200); // Initialise UART
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gpio_output(LED1); // Initialise LED1
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gpio_output(LED2); // Initialise LED2
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gpio_output(LED3); // Initialise LED3
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ethernet_init(); // Initialise Ethernet pins
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}
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#if defined(__ARMCC_VERSION)
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// Keil specific - implement IO printf redirection
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int fputc(int c, FILE *stream) {
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if (stream == stdout || stream == stderr) uart_write_byte(UART_DEBUG, c);
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return c;
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}
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#elif defined(__GNUC__)
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// ARM GCC specific. ARM GCC is shipped with Newlib C library.
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// Implement newlib syscalls:
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// _sbrk() for malloc
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// _write() for printf redirection
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// the rest are just stubs
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#include <sys/stat.h> // For _fstat()
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uint32_t SystemCoreClock;
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void SystemInit(void) { // Called automatically by startup code
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}
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int _fstat(int fd, struct stat *st) {
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(void) fd, (void) st;
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return -1;
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}
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extern unsigned char _end[]; // End of data section, start of heap. See link.ld
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static unsigned char *s_current_heap_end = _end;
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size_t hal_ram_used(void) {
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return (size_t) (s_current_heap_end - _end);
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}
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size_t hal_ram_free(void) {
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unsigned char endofstack;
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return (size_t) (&endofstack - s_current_heap_end);
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}
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void *_sbrk(int incr) {
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unsigned char *prev_heap;
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unsigned char *heap_end = (unsigned char *) ((size_t) &heap_end - 256);
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prev_heap = s_current_heap_end;
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// Check how much space we got from the heap end to the stack end
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if (s_current_heap_end + incr > heap_end) return (void *) -1;
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s_current_heap_end += incr;
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return prev_heap;
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}
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int _open(const char *path) {
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(void) path;
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return -1;
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}
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int _close(int fd) {
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(void) fd;
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return -1;
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}
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int _isatty(int fd) {
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(void) fd;
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return 1;
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}
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int _lseek(int fd, int ptr, int dir) {
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(void) fd, (void) ptr, (void) dir;
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return 0;
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}
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void _exit(int status) {
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(void) status;
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for (;;) asm volatile("BKPT #0");
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}
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void _kill(int pid, int sig) {
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(void) pid, (void) sig;
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}
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int _getpid(void) {
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return -1;
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}
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int _write(int fd, char *ptr, int len) {
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(void) fd, (void) ptr, (void) len;
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if (fd == 1) uart_write_buf(UART_DEBUG, ptr, (size_t) len);
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return -1;
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}
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int _read(int fd, char *ptr, int len) {
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(void) fd, (void) ptr, (void) len;
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return -1;
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}
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int _link(const char *a, const char *b) {
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(void) a, (void) b;
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return -1;
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}
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int _unlink(const char *a) {
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(void) a;
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return -1;
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}
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int _stat(const char *path, struct stat *st) {
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(void) path, (void) st;
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return -1;
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}
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int mkdir(const char *path, mode_t mode) {
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(void) path, (void) mode;
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return -1;
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}
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void _init(void) {
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}
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#endif // __GNUC__
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