Compiled and linked SAMD21x18 version successfully.

1 files changed, 167 insertions, 0 deletions

diff --git a/atmel-samd/main.c b/atmel-samd/main.c
new file mode 100644
index 000000000..1033a44c1
--- /dev/null
+++ b/atmel-samd/main.c
@@ -0,0 +1,167 @@
+#include <stdint.h>
+#include <stdio.h>
+#include <string.h>
+
+#include "py/nlr.h"
+#include "py/compile.h"
+#include "py/runtime.h"
+#include "py/repl.h"
+#include "py/gc.h"
+#include "lib/utils/pyexec.h"
+
+void do_str(const char *src, mp_parse_input_kind_t input_kind) {
+    mp_lexer_t *lex = mp_lexer_new_from_str_len(MP_QSTR__lt_stdin_gt_, src, strlen(src), 0);
+    if (lex == NULL) {
+        printf("MemoryError: lexer could not allocate memory\n");
+        return;
+    }
+
+    nlr_buf_t nlr;
+    if (nlr_push(&nlr) == 0) {
+        qstr source_name = lex->source_name;
+        mp_parse_tree_t parse_tree = mp_parse(lex, input_kind);
+        mp_obj_t module_fun = mp_compile(&parse_tree, source_name, MP_EMIT_OPT_NONE, true);
+        mp_call_function_0(module_fun);
+        nlr_pop();
+    } else {
+        // uncaught exception
+        mp_obj_print_exception(&mp_plat_print, (mp_obj_t)nlr.ret_val);
+    }
+}
+
+static char *stack_top;
+static char heap[2048];
+
+int main(int argc, char **argv) {
+    int stack_dummy;
+    stack_top = (char*)&stack_dummy;
+
+    #if MICROPY_ENABLE_GC
+    gc_init(heap, heap + sizeof(heap));
+    #endif
+    mp_init();
+    #if MICROPY_REPL_EVENT_DRIVEN
+    pyexec_event_repl_init();
+    for (;;) {
+        int c = mp_hal_stdin_rx_chr();
+        if (pyexec_event_repl_process_char(c)) {
+            break;
+        }
+    }
+    #else
+    pyexec_friendly_repl();
+    #endif
+    //do_str("print('hello world!', list(x+1 for x in range(10)), end='eol\\n')", MP_PARSE_SINGLE_INPUT);
+    //do_str("for i in range(10):\r\n  print(i)", MP_PARSE_FILE_INPUT);
+    mp_deinit();
+    return 0;
+}
+
+void gc_collect(void) {
+    // WARNING: This gc_collect implementation doesn't try to get root
+    // pointers from CPU registers, and thus may function incorrectly.
+    void *dummy;
+    gc_collect_start();
+    gc_collect_root(&dummy, ((mp_uint_t)stack_top - (mp_uint_t)&dummy) / sizeof(mp_uint_t));
+    gc_collect_end();
+    gc_dump_info();
+}
+
+mp_lexer_t *mp_lexer_new_from_file(const char *filename) {
+    return NULL;
+}
+
+mp_import_stat_t mp_import_stat(const char *path) {
+    return MP_IMPORT_STAT_NO_EXIST;
+}
+
+mp_obj_t mp_builtin_open(uint n_args, const mp_obj_t *args, mp_map_t *kwargs) {
+    return mp_const_none;
+}
+MP_DEFINE_CONST_FUN_OBJ_KW(mp_builtin_open_obj, 1, mp_builtin_open);
+
+void nlr_jump_fail(void *val) {
+}
+
+void NORETURN __fatal_error(const char *msg) {
+    while (1);
+}
+
+#ifndef NDEBUG
+void MP_WEAK __assert_func(const char *file, int line, const char *func, const char *expr) {
+    printf("Assertion '%s' failed, at file %s:%d\n", expr, file, line);
+    __fatal_error("Assertion failed");
+}
+#endif
+
+#if MICROPY_MIN_USE_CORTEX_CPU
+
+// this is a minimal IRQ and reset framework for any Cortex-M CPU
+
+extern uint32_t _estack, _sidata, _sdata, _edata, _sbss, _ebss;
+
+void Reset_Handler(void) __attribute__((naked));
+void Reset_Handler(void) {
+    // stack pointer set by bootloader
+    // copy .data section from flash to RAM
+    for (uint32_t *src = &_sidata, *dest = &_sdata; dest < &_edata;) {
+        *dest++ = *src++;
+    }
+    // zero out .bss section
+    for (uint32_t *dest = &_sbss; dest < &_ebss;) {
+        *dest++ = 0;
+    }
+    // jump to board initialisation
+    void _start(void);
+    _start();
+}
+
+void Default_Handler(void) {
+    for (;;) {
+    }
+}
+
+uint32_t isr_vector[] __attribute__((section(".isr_vector"))) = {
+    (uint32_t)&_estack,
+    (uint32_t)&Reset_Handler,
+    (uint32_t)&Default_Handler, // NMI_Handler
+    (uint32_t)&Default_Handler, // HardFault_Handler
+    (uint32_t)&Default_Handler, // MemManage_Handler
+    (uint32_t)&Default_Handler, // BusFault_Handler
+    (uint32_t)&Default_Handler, // UsageFault_Handler
+    0,
+    0,
+    0,
+    0,
+    (uint32_t)&Default_Handler, // SVC_Handler
+    (uint32_t)&Default_Handler, // DebugMon_Handler
+    0,
+    (uint32_t)&Default_Handler, // PendSV_Handler
+    (uint32_t)&Default_Handler, // SysTick_Handler
+};
+
+void _start(void) {
+    // when we get here: stack is initialised, bss is clear, data is copied
+
+    // initialise the cpu and peripherals
+    #if MICROPY_MIN_USE_SAMD21_MCU
+    void samd21_init(void);
+    samd21_init();
+    #endif
+
+    // now that we have a basic system up and running we can call main
+    main(0, NULL);
+
+    // we must not return
+    for (;;) {
+    }
+}
+
+#endif
+
+#if MICROPY_MIN_USE_SAMD21_MCU
+
+void samd21_init(void) {
+}
+
+#endif