Initial support for MicroPython

ada/buildsupport.adb

@@ -215,6 +215,8 @@ procedure BuildSupport is
                                              C_Set_Language_To_BlackBox_Device;
                      when Language_QGenAda       => C_Set_Language_To_QGenAda;
                      when Language_QGenC         => C_Set_Language_To_QGenC;
+                     when Language_MicroPython   =>
+                                             C_Set_Language_To_MicroPython;
                      when others                 => Exit_On_Error (True,
                          "Language is currently not supported: "
                          & Source_Language'Img);

ada/imported_routines.ads

@@ -162,6 +162,7 @@ package Imported_Routines is
    procedure C_Set_Language_To_GUI;
    procedure C_Set_Language_To_VHDL;
    procedure C_Set_Language_To_System_C;
+   procedure C_Set_Language_To_MicroPython;
    procedure C_Set_Native_Encoding;
    procedure C_Set_UPER_Encoding;
    procedure C_Set_ACN_Encoding;
@@ -249,6 +250,8 @@ private
    pragma Import (C, C_Set_Language_To_GUI, "Set_Language_To_GUI");
    pragma Import (C, C_Set_Language_To_VHDL, "Set_Language_To_VHDL");
    pragma Import (C, C_Set_Language_To_System_C, "Set_Language_To_System_C");
+   pragma Import (C, C_Set_Language_To_MicroPython,
+     "Set_Language_To_MicroPython");
    pragma Import (C, C_Set_UPER_Encoding, "Set_UPER_Encoding");
    pragma Import (C, C_Set_ACN_Encoding, "Set_ACN_Encoding");
    pragma Import (C, C_Set_Native_Encoding, "Set_Native_Encoding");

c/build_c_glue.c

@@ -62,6 +62,9 @@ void c_preamble(FV * fv)
     else if (rtds == fv->language) {
         fprintf(vm_if, "#include \"glue_%s.h\"\n\n", fv->name);
     }
+    else if (micropython == fv->language) {
+        fprintf(vm_if, "#include \"%s_mpy_bindings.h\"\n\n", fv->name);
+    }
 
     if (hasparam) {
         fprintf(vm_if,   "#include \"C_ASN1_Types.h\"\n\n");
@@ -714,7 +717,8 @@ void GLUE_C_Backend(FV * fv)
 
     if (c == fv->language || gui == fv->language || ada == fv->language || vdm == fv->language
         || qgenada == fv->language || qgenc == fv->language
-        || rtds == fv->language || cpp == fv->language || opengeode == fv->language) {
+        || rtds == fv->language || cpp == fv->language || opengeode == fv->language
+        || micropython == fv->language) {
         Init_C_Glue_Backend(fv);
         FOREACH(i, Interface, fv->interfaces, {
                 GLUE_C_ProvidedInterface(i);

c/build_micropython_glue.c

+/* Buildsupport is (c) 2008-2015 European Space Agency
+ * contact: maxime.perrotin@esa.int
+ * License is LGPL, check LICENSE file */
+/* build_sdl_glue.c
+
+  this program generates the code to interface an objectgeode generated application with the assert virtual machine
+  It creates X_mpy_bindings.h and X_mpy_bindings.c.
+  
+ */
+
+#define ID "$Id: build_sdl_glue.c 414 2009-12-04 16:21:52Z maxime1008 $"
+
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <sys/stat.h>
+
+#include "my_types.h"
+#include "practical_functions.h"
+
+static FILE *mpy_bind_h, *mpy_bind_c;
+
+static bool gen_this_ri(Interface * i)
+{
+    /* 
+     * There can be duplicate RI name but one sync, the other async
+     * In that case, discard the async one (generated by VT to allow
+     * a mix of sync and async PI in one block
+     */
+    if (asynch == i->synchronism) {
+        FOREACH(interface, Interface, i->parent_fv->interfaces, {
+            if (RI == interface->direction &&
+                !strcmp(interface->name, i->name) &&
+                synch == interface->synchronism) {
+                return false;
+            }
+
+        });
+    }
+
+    return true;
+}
+
+void micropython_mpy_bind_preamble(FV * fv)
+{
+    if (NULL == mpy_bind_h || NULL == mpy_bind_c)
+	return;
+
+    int hasparam = 0;
+
+    /* Check if any interface needs ASN.1 types */
+    FOREACH(i, Interface, fv->interfaces, {
+            CheckForAsn1Params(i, &hasparam);}
+    );
+
+    fprintf(mpy_bind_h,
+            "/* This file was generated automatically by build_micropython_glue.c: DO NOT MODIFY IT ! */\n\n");
+    fprintf(mpy_bind_h,
+            "/* Declaration of the functions that have to be provided by the user */\n\n");
+    fprintf(mpy_bind_h,
+            "#ifndef __USER_CODE_H_%s__\n#define __USER_CODE_H_%s__\n\n",
+            fv->name, fv->name);
+
+    fprintf(mpy_bind_h, "#include <stdint.h>\n\n");
+
+    if (hasparam) {
+        fprintf(mpy_bind_h, "#include \"C_ASN1_Types.h\"\n\n");
+    }
+
+    fprintf(mpy_bind_h,
+            "#ifdef __cplusplus\n"
+            "extern \"C\" {\n" 
+            "#endif\n\n");
+
+    fprintf(mpy_bind_h, "void %s_startup();\n\n", fv->name);
+
+    fprintf(mpy_bind_c, "#include \"py/runtime.h\"\n");
+    fprintf(mpy_bind_c, "#include \"py/gc.h\"\n");
+    fprintf(mpy_bind_c, "#include \"py/stackctrl.h\"\n");
+    fprintf(mpy_bind_c, "#include \"py/pystack.h\"\n");
+    fprintf(mpy_bind_c, "#include \"mputil.h\"\n");
+    fprintf(mpy_bind_c, "#include \"%s_mpy_bindings.h\"\n", fv->name);
+    fprintf(mpy_bind_c, "#include \"%s.mpy.h\"\n\n", fv->name);
+
+    if (has_context_param(fv)) {
+        char *fv_no_underscore =
+            underscore_to_dash(fv->name, strlen(fv->name));
+        fprintf(mpy_bind_c,
+                "/* Function static data is declared in this file : */\n");
+        fprintf(mpy_bind_c, "#include \"Context-%s.h\"\n\n",
+                fv_no_underscore);
+        free(fv_no_underscore);
+    }
+
+    fprintf(mpy_bind_c, "mp_state_ctx_t *mp_current_ctx;\n"); // TODO there should only be one of these per executable
+    fprintf(mpy_bind_c, "static mp_state_ctx_t mp_ctx;\n");
+    fprintf(mpy_bind_c, "static uint64_t mp_heap[4096];\n");
+    fprintf(mpy_bind_c, "static mp_obj_t mp_pystack[4096];\n\n");
+
+    FOREACH(i, Interface, fv->interfaces, {
+        if (i->direction == PI) {
+            fprintf(mpy_bind_c, "static mp_obj_t mp_global_%s_PI_%s;\n\n", i->parent_fv->name, i->name);
+        }
+    });
+
+    fprintf(mpy_bind_c, "void %s_startup()\n{\n", fv->name);
+
+    fprintf(mpy_bind_c,
+        "    /* MicroPython VM initialisation */\n"
+        "    mp_current_ctx = &mp_ctx;\n"
+        "    mp_stack_ctrl_init();\n"
+        "    mp_stack_set_limit(8192);\n"
+        "    gc_init(mp_heap, (uint8_t*)mp_heap + sizeof(mp_heap));\n"
+        "    mp_pystack_init(mp_pystack, (uint8_t*)mp_pystack + sizeof(mp_pystack));\n"
+        "    mp_init();\n"
+        "    mp_exec_mpy(mpy_script_data, mpy_script_len);\n"
+    );
+
+    fprintf(mpy_bind_c,
+        "    mp_obj_t global_startup = mp_load_global(MP_QSTR_%s_startup);\n", fv->name);
+
+    FOREACH(i, Interface, fv->interfaces, {
+        if (i->direction == PI) {
+            fprintf(mpy_bind_c,
+                "    mp_global_%s_PI_%s = mp_load_global(MP_QSTR_%s_PI_%s);\n",
+                    i->parent_fv->name, i->name, i->parent_fv->name, i->name);
+        }
+    });
+
+    fprintf(mpy_bind_c,
+            "    mp_call_function_0(global_startup);\n"
+    );
+
+    fprintf(mpy_bind_c, "}\n\n");
+}
+
+void micropython_add_PI_to_glue(Interface * i)
+{
+    if (NULL == mpy_bind_h)
+        return;
+
+    char *signature = make_string("void %s_PI_%s(",
+                                  i->parent_fv->name,
+                                  i->name);
+    char *signature_py = make_string("def %s_PI_%s(",
+                                     i->parent_fv->name,
+                                     i->name);
+
+    size_t sig_len = strlen(signature);
+    char *sep = make_string(",\n%*s", sig_len, "");
+    char *sep_py = make_string(",\n%*s", strlen(signature_py), "");
+    size_t n_args = 0;
+
+    fprintf(mpy_bind_h, "%s", signature);
+    fprintf(mpy_bind_c, "%s", signature);
+
+    FOREACH (p, Parameter, i->in, {
+        char *sort = make_string("%sconst asn1Scc%s *",
+                                 n_args ? sep: "",
+                                 p->type);
+        fprintf(mpy_bind_h, "%s", sort);
+        fprintf(mpy_bind_c, "%sIN_%s",
+                             sort,
+                             p->name);
+        free(sort);
+        n_args += 1;
+    });
+
+    FOREACH (p, Parameter, i->out, {
+        char *sort = make_string("%sasn1Scc%s *",
+                                 n_args ? sep: "",
+                                 p->type);
+        fprintf(mpy_bind_h, "%s", sort);
+        fprintf(mpy_bind_c, "%sOUT_%s",
+                             sort,
+                             p->name);
+        free(sort);
+        n_args += 1;
+    });
+
+    fprintf(mpy_bind_h, ");\n\n");
+    fprintf(mpy_bind_c, ")\n{\n");
+    fprintf(mpy_bind_c, "    mp_current_ctx = &mp_ctx;\n");
+    fprintf(mpy_bind_c, "    mp_obj_t args[%u];\n", n_args);
+    fprintf(mpy_bind_c,
+        "    mp_stack_ctrl_init();\n"
+        "    mp_stack_set_limit(2048);\n"
+        "    nlr_buf_t nlr;\n"
+        "    if (nlr_push(&nlr) == 0) {\n"
+    );
+    n_args = 0;
+    FOREACH (p, Parameter, i->in, {
+        fprintf(mpy_bind_c,
+            "        args[%u] = mp_obj_new_int(*IN_%s);\n", n_args, p->name);
+        n_args += 1;
+    });
+    fprintf(mpy_bind_c,
+        "        mp_call_function_n_kw(mp_global_%s_PI_%s, %u, 0, args);\n"
+        "        nlr_pop();\n"
+        "    } else {\n"
+        "        mp_obj_print_exception(&mp_plat_print, MP_OBJ_FROM_PTR(nlr.ret_val));\n"
+        "    }\n"
+        "}\n"
+        "\n",
+        i->parent_fv->name, i->name, n_args
+    );
+
+    free(signature);
+    free(signature_py);
+    free(sep);
+    free(sep_py);
+}
+
+void micropython_add_RI_to_glue(Interface * i)
+{
+    if (NULL == mpy_bind_h)
+        return;
+
+    char *signature = make_string("extern void %s_RI_%s(",
+                                  i->parent_fv->name,
+                                  i->name);
+
+    size_t sig_len = strlen(signature);
+    char *sep = make_string(",\n%*s", sig_len, "");
+    size_t n_args = 0;
+
+    fprintf(mpy_bind_c, "%s", signature);
+
+    FOREACH (p, Parameter, i->in, {
+        fprintf(mpy_bind_c, "%sconst asn1Scc%s *",
+                             n_args ? sep: "",
+                             p->type);
+        n_args += 1;
+    });
+
+    FOREACH (p, Parameter, i->out, {
+        fprintf(mpy_bind_c,"%sasn1Scc%s *",
+                            n_args ? sep: "",
+                            p->type);
+        n_args += 1;
+    });
+
+    fprintf(mpy_bind_c, ");\n\n");
+    free(signature);
+    free(sep);
+
+    fprintf(mpy_bind_c,
+        "STATIC mp_obj_t %s_RI_%s_wrap(size_t n_args, const mp_obj_t *args)\n"
+        "{\n",
+        i->parent_fv->name, i->name
+    );
+    n_args = 0;
+    FOREACH (p, Parameter, i->in, {
+        fprintf(mpy_bind_c,
+            "    asn1Scc%s asn_IN_%s = mp_obj_get_int(args[%u]);\n",
+            p->type, p->name, n_args);
+        n_args += 1;
+    });
+    n_args = 0;
+    FOREACH (p, Parameter, i->out, {
+        fprintf(mpy_bind_c,
+            "    asn1Scc%s asn_OUT_%s;\n",
+            p->type, p->name);
+        n_args += 1;
+    });
+    fprintf(mpy_bind_c, "    %s_RI_%s(", i->parent_fv->name, i->name);
+    n_args = 0;
+    FOREACH (p, Parameter, i->in, {
+        fprintf(mpy_bind_c, "%s&asn_IN_%s", n_args ? ", " : "", p->name);
+        n_args += 1;
+    });
+    FOREACH (p, Parameter, i->out, {
+        fprintf(mpy_bind_c, "%s&asn_OUT_%s", n_args ? ", " : "", p->name);
+        n_args += 1;
+    });
+    fprintf(mpy_bind_c, ");\n");
+
+    fprintf(mpy_bind_c, 
+        "    return mp_const_none;\n"
+        "}\n"
+        "STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(%s_RI_%s_obj, %u, %u, %s_RI_%s_wrap);\n"
+        "\n",
+        i->parent_fv->name, i->name,
+        n_args, n_args,
+        i->parent_fv->name, i->name
+    );
+}
+
+int Init_MicroPython_Glue_Backend(FV * fv)
+{
+    char *path = NULL, *filename = NULL;
+    if (NULL != fv->system_ast->context->output)
+	build_string(&path, fv->system_ast->context->output,
+		      strlen(fv->system_ast->context->output));
+    build_string(&path, fv->name, strlen(fv->name));
+    build_string(&filename, fv->name, strlen(fv->name));
+    build_string(&filename, "_mpy_bindings.c", strlen("_mpy_bindings.c"));
+    create_file(path, filename, &mpy_bind_c);
+    filename[strlen(filename) - 1] = 'h';
+    create_file(path, filename, &mpy_bind_h);
+    free(path);
+    free(filename);
+    if (NULL == mpy_bind_c || NULL == mpy_bind_h)
+	return -1;
+
+    micropython_mpy_bind_preamble(fv);
+    return 0;
+}
+
+void End_MicroPython_Glue_Backend(FV *fv)
+{
+    // Generate the taste module
+
+    fprintf(mpy_bind_c,
+        "STATIC const mp_rom_map_elem_t taste_module_globals_table[] = {\n"
+        "    { MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_taste) },\n"
+    );
+
+    FOREACH(i, Interface, fv->interfaces, {
+        if (i->direction == RI && gen_this_ri(i)) {
+            fprintf(mpy_bind_c,
+                "    { MP_ROM_QSTR(MP_QSTR_%s_RI_%s), MP_ROM_PTR(&%s_RI_%s_obj) },\n",
+                i->parent_fv->name, i->name,
+                i->parent_fv->name, i->name
+            );
+        }
+    });
+
+    fprintf(mpy_bind_c,
+        "};\n"
+        "\n"
+        "STATIC MP_DEFINE_CONST_DICT(taste_module_globals, taste_module_globals_table);\n"
+        "\n"
+        "const mp_obj_module_t mp_module_taste = {\n"
+        "    .base = { &mp_type_module },\n"
+        "    .globals = (mp_obj_dict_t*)&taste_module_globals,\n"
+        "};\n"
+    );
+
+    if (NULL != mpy_bind_h) {
+        fprintf(mpy_bind_h,
+            "#ifdef __cplusplus\n"
+            "}\n" 
+            "#endif\n\n");
+        fprintf(mpy_bind_h, "\n#endif\n");
+        close_file(&mpy_bind_h);
+    }
+
+    close_file(&mpy_bind_c);
+} 
+
+/* Function to process one interface of the FV */
+void GLUE_MicroPython_Interface(Interface * i)
+{
+    switch (i->direction) {
+    case PI:
+        micropython_add_PI_to_glue(i);
+        break;
+
+    case RI:
+        if (gen_this_ri(i)) {
+            micropython_add_RI_to_glue(i);
+        }
+        break;
+
+    default:
+        break;
+    }
+}
+
+
+// External interface (the one and unique)
+void GLUE_MicroPython_Backend(FV * fv)
+{
+    if (fv->system_ast->context->onlycv)
+	return;
+    if (micropython == fv->language) {
+        Init_MicroPython_Glue_Backend(fv);
+	FOREACH(i, Interface, fv->interfaces, {
+	    GLUE_MicroPython_Interface(i);
+	})
+	End_MicroPython_Glue_Backend(fv);
+    }
+}

c/build_micropython_skeletons.c

+/* Buildsupport is (c) 2008-2016 European Space Agency
+ * contact: maxime.perrotin@esa.int
+ * License is LGPL, check LICENSE file */
+/* build_c_skeletons.c
+
+  this program generates empty C functions respecting the interfaces defined
+  in the interface view. it provides functions to invoke RI.
+
+  updated 10/06/2016: properly align params and use FOREACH
+  updated 20/04/2009 to disable in case "-onlycv" flag is set
+  updated 8/10/2009 to rename the user_code.h/c to FV_name.h/c like in the Ada backend
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <sys/stat.h>
+#include <stdbool.h>
+#include <assert.h>
+
+#include "my_types.h"
+#include "practical_functions.h"
+
+static FILE *user_code_py = NULL;
+
+static bool gen_this_ri(Interface * i)
+{
+    /* 
+     * There can be duplicate RI name but one sync, the other async
+     * In that case, discard the async one (generated by VT to allow
+     * a mix of sync and async PI in one block
+     */
+    if (asynch == i->synchronism) {
+        FOREACH(interface, Interface, i->parent_fv->interfaces, {
+            if (RI == interface->direction &&
+                !strcmp(interface->name, i->name) &&
+                synch == interface->synchronism) {
+                return false;
+            }
+
+        });
+    }
+
+    return true;
+}
+
+/* Import the RI into the module-level namespace of the Python script */
+void import_RI_to_MicroPython_skel(Interface * i)
+{
+    if (NULL == user_code_py)
+        return;
+
+    bool comma = false;
+
+    fprintf(user_code_py, "# %s_RI_%s(", i->parent_fv->name, i->name);
+
+    FOREACH (p, Parameter, i->in, {
+        fprintf(user_code_py, "%sIN_%s: asn1Scc%s",
+            comma ? "," : "", p->name, p->type);
+        comma = true;
+    });
+
+    FOREACH (p, Parameter, i->out, {
+        fprintf(user_code_py,"%sOUT_%s: asn1Scc%s",
+            comma ? "," : "", p->name, p->type);
+        comma = true;
+    });
+
+    fprintf(user_code_py, ")\n");
+
+    fprintf(user_code_py, "from taste import %s_RI_%s\n", i->parent_fv->name, i->name);
+}
+
+/* Generate the preamble of the skeleton script */
+void micropython_skel_preamble(FV * fv)
+{
+    int hasparam = 0;
+
+    /* Check if any interface needs ASN.1 types */
+    FOREACH(i, Interface, fv->interfaces, {
+            CheckForAsn1Params(i, &hasparam);}
+    );
+
+    /* c. user_code.py preamble (if applicable) */
+    if (NULL != user_code_py) {
+        fprintf(user_code_py,
+                "# User code: This file will not be overwritten by TASTE.\n\n");
+        fprintf(user_code_py, "import micropython\n\n");
+
+        FOREACH(i, Interface, fv->interfaces, {
+            if (i->direction == RI && gen_this_ri(i)) {
+                import_RI_to_MicroPython_skel(i);
+            }
+        });
+        fprintf(user_code_py, "\n");
+
+        // TODO need to generate dummy variables for the types
+
+        if (has_context_param(fv)) {
+            char *fv_no_underscore =
+                underscore_to_dash(fv->name, strlen(fv->name));
+            fprintf(user_code_py,
+                    "/* Function static data is declared in this file : */\n");
+            fprintf(user_code_py, "#include \"Context-%s.h\"\n\n",
+                    fv_no_underscore);
+            free(fv_no_underscore);
+        }
+
+        fprintf(user_code_py, "def %s_startup():\n", fv->name);
+
+        fprintf(user_code_py,
+                "    # Write your initialization code here,\n"
+                "    # but do not make any call to a required interface.\n"
+                "    pass\n"
+                "\n\n");
+    }
+}
+
+/* Creates user_code.h, and if necessary user_code.c (if it did not exist) */
+int Init_MicroPython_GW_Backend(FV * fv)
+{
+    char *path = NULL;
+    char *filename = NULL;
+
+    if (NULL != fv->system_ast->context->output) {
+        build_string(&path, fv->system_ast->context->output,
+                     strlen(fv->system_ast->context->output));
+    }
+    build_string(&path, fv->name, strlen(fv->name));
+    build_string(&filename, fv->name, strlen(fv->name));
+    build_string(&filename, ".h", strlen(".h"));
+
+    filename[strlen(filename) - 1] = 'p';       /* change from .c to .p */
+    build_string(&filename, "y", 1);            /* change from .p to .py */
+    if (!file_exists(path, filename)) {
+        printf("MicroPython: creating fresh skeleton %s/%s\n", path, filename);
+        create_file(path, filename, &user_code_py);
+    }
+
+    free(path);
+
+    micropython_skel_preamble(fv);
+
+    return 0;
+}
+
+
+void close_micropython_skel_files()
+{
+    close_file(&user_code_py);
+}
+
+/* Add a Provided interface. Can contain in and out parameters
+ * Write in user_code.h the declaration of the user functions
+ * and if user_code.c is new, copy these declarations there too.
+ */
+void add_PI_to_MicroPython_skel(Interface * i)
+{
+    if (NULL == user_code_py)
+        return;
+
+    char *signature_py = make_string("def %s_PI_%s(",
+                                     i->parent_fv->name,
+                                     i->name);
+    char *sep_py = make_string(",\n%*s", strlen(signature_py), "");
+    bool comma = false;
+
+    fprintf(user_code_py, "%s", signature_py);
+
+#if 0
+    // This code generates type hints for the parameters, but need to have the identifiers defined as globals first...
+    FOREACH (p, Parameter, i->in, {
+        fprintf(user_code_py, "%sIN_%s : asn1Scc%s",
+            comma ? sep_py : "", p->name, p->type);
+        comma = true;
+    });
+
+    FOREACH (p, Parameter, i->out, {
+        fprintf(user_code_py, "%sOUT_%s : asn1Scc%s",