esp32: Add support for the esp32's ULP.

The ULP is available as esp32.ULP().  See README.ulp.md for basic usage.

1 files changed, 97 insertions, 0 deletions

diff --git a/ports/esp32/esp32_ulp.c b/ports/esp32/esp32_ulp.c
new file mode 100644
index 000000000..3772639f4
--- /dev/null
+++ b/ports/esp32/esp32_ulp.c
@@ -0,0 +1,97 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2018 "Andreas Valder" <andreas.valder@serioese.gmbh>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "py/runtime.h"
+
+#include "esp32/ulp.h"
+#include "esp_err.h"
+
+typedef struct _esp32_ulp_obj_t {
+    mp_obj_base_t base;
+} esp32_ulp_obj_t;
+
+const mp_obj_type_t esp32_ulp_type;
+
+// singleton ULP object
+STATIC const esp32_ulp_obj_t esp32_ulp_obj = {{&esp32_ulp_type}};
+
+STATIC mp_obj_t esp32_ulp_make_new(const mp_obj_type_t *type, size_t n_args, size_t n_kw, const mp_obj_t *args) {
+    // check arguments
+    mp_arg_check_num(n_args, n_kw, 0, 0, false);
+
+    // return constant object
+    return (mp_obj_t)&esp32_ulp_obj;
+}
+
+STATIC mp_obj_t esp32_ulp_set_wakeup_period(mp_obj_t self_in, mp_obj_t period_index_in, mp_obj_t period_us_in) {
+    mp_uint_t period_index = mp_obj_get_int(period_index_in);
+    mp_uint_t period_us = mp_obj_get_int(period_us_in);
+    int _errno = ulp_set_wakeup_period(period_index, period_us);
+    if (_errno != ESP_OK) {
+	    mp_raise_OSError(_errno);
+    }
+    return mp_const_none;
+}
+STATIC MP_DEFINE_CONST_FUN_OBJ_3(esp32_ulp_set_wakeup_period_obj, esp32_ulp_set_wakeup_period);
+
+STATIC mp_obj_t esp32_ulp_load_binary(mp_obj_t self_in, mp_obj_t load_addr_in, mp_obj_t program_binary_in) {
+    mp_uint_t load_addr = mp_obj_get_int(load_addr_in);
+
+    mp_buffer_info_t bufinfo;
+    mp_get_buffer_raise(program_binary_in, &bufinfo, MP_BUFFER_READ);
+
+    int _errno = ulp_load_binary(load_addr, bufinfo.buf, bufinfo.len/sizeof(uint32_t));
+    if (_errno != ESP_OK) {
+	    mp_raise_OSError(_errno);
+    }
+    return mp_const_none;
+}
+STATIC MP_DEFINE_CONST_FUN_OBJ_3(esp32_ulp_load_binary_obj, esp32_ulp_load_binary);
+
+STATIC mp_obj_t esp32_ulp_run(mp_obj_t self_in, mp_obj_t entry_point_in) {
+    mp_uint_t entry_point = mp_obj_get_int(entry_point_in);
+    int _errno = ulp_run(entry_point/sizeof(uint32_t));
+    if (_errno != ESP_OK) {
+	    mp_raise_OSError(_errno);
+    }
+    return mp_const_none;
+}
+STATIC MP_DEFINE_CONST_FUN_OBJ_2(esp32_ulp_run_obj, esp32_ulp_run);
+
+STATIC const mp_rom_map_elem_t esp32_ulp_locals_dict_table[] = {
+    { MP_ROM_QSTR(MP_QSTR_set_wakeup_period), MP_ROM_PTR(&esp32_ulp_set_wakeup_period_obj) },
+    { MP_ROM_QSTR(MP_QSTR_load_binary), MP_ROM_PTR(&esp32_ulp_load_binary_obj) },
+    { MP_ROM_QSTR(MP_QSTR_run), MP_ROM_PTR(&esp32_ulp_run_obj) },
+    { MP_ROM_QSTR(MP_QSTR_RESERVE_MEM), MP_ROM_INT(CONFIG_ULP_COPROC_RESERVE_MEM) },
+};
+STATIC MP_DEFINE_CONST_DICT(esp32_ulp_locals_dict, esp32_ulp_locals_dict_table);
+
+const mp_obj_type_t esp32_ulp_type = {
+    { &mp_type_type },
+    .name = MP_QSTR_ULP,
+    .make_new = esp32_ulp_make_new,
+    .locals_dict = (mp_obj_t)&esp32_ulp_locals_dict,
+};