add circuitpython code

1 files changed, 232 insertions, 0 deletions

diff --git a/circuitpython/devices/ble_hci/common-hal/_bleio/Characteristic.c b/circuitpython/devices/ble_hci/common-hal/_bleio/Characteristic.c
new file mode 100644
index 0000000..e2f9cad
--- /dev/null
+++ b/circuitpython/devices/ble_hci/common-hal/_bleio/Characteristic.c
@@ -0,0 +1,232 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) Dan Halbert for Adafruit Industries
+ * Copyright (c) 2018 Artur Pacholec
+ *
+ * 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 "shared-bindings/_bleio/__init__.h"
+#include "shared-bindings/_bleio/Characteristic.h"
+#include "shared-bindings/_bleio/CharacteristicBuffer.h"
+#include "shared-bindings/_bleio/Descriptor.h"
+#include "shared-bindings/_bleio/PacketBuffer.h"
+#include "shared-bindings/_bleio/Service.h"
+
+#include "common-hal/_bleio/Adapter.h"
+#include "common-hal/_bleio/att.h"
+
+#define CCCD_NOTIFY   0x1
+#define CCCD_INDICATE 0x2
+
+
+void common_hal_bleio_characteristic_construct(bleio_characteristic_obj_t *self, bleio_service_obj_t *service, uint16_t handle, bleio_uuid_obj_t *uuid, bleio_characteristic_properties_t props, bleio_attribute_security_mode_t read_perm, bleio_attribute_security_mode_t write_perm, mp_int_t max_length, bool fixed_length, mp_buffer_info_t *initial_value_bufinfo, const char *user_description) {
+    self->service = service;
+    self->uuid = uuid;
+    self->decl_handle = BLE_GATT_HANDLE_INVALID;
+    self->handle = BLE_GATT_HANDLE_INVALID;
+    self->props = props;
+    self->read_perm = read_perm;
+    self->write_perm = write_perm;
+    self->descriptor_list = mp_obj_new_list(0, NULL);
+    self->observer = mp_const_none;
+    self->user_desc = NULL;
+    self->cccd = NULL;
+    self->sccd = NULL;
+    self->value = mp_obj_new_bytes(initial_value_bufinfo->buf, initial_value_bufinfo->len);
+
+    const mp_int_t max_length_max = 512;
+    if (max_length < 0 || max_length > max_length_max) {
+        mp_raise_ValueError(translate("max_length must be <= 512"));
+    }
+    self->max_length = max_length;
+    self->fixed_length = fixed_length;
+
+    if (service->is_remote) {
+        self->handle = handle;
+    } else {
+        common_hal_bleio_service_add_characteristic(self->service, self, initial_value_bufinfo, user_description);
+    }
+}
+
+mp_obj_tuple_t *common_hal_bleio_characteristic_get_descriptors(bleio_characteristic_obj_t *self) {
+    return mp_obj_new_tuple(self->descriptor_list->len, self->descriptor_list->items);
+}
+
+bleio_service_obj_t *common_hal_bleio_characteristic_get_service(bleio_characteristic_obj_t *self) {
+    return self->service;
+}
+
+size_t common_hal_bleio_characteristic_get_max_length(bleio_characteristic_obj_t *self) {
+    return self->max_length;
+}
+
+size_t common_hal_bleio_characteristic_get_value(bleio_characteristic_obj_t *self, uint8_t *buf, size_t len) {
+    // Do GATT operations only if this characteristic has been added to a registered service.
+    if (self->handle != BLE_GATT_HANDLE_INVALID) {
+        // FIX uint16_t conn_handle = bleio_connection_get_conn_handle(self->service->connection);
+        if (common_hal_bleio_service_get_is_remote(self->service)) {
+            // FIX read remote chars
+            // uint8_t rsp[MAX(len, 512)];
+            // FIX improve att_read_req to write into our requested buffer.
+            // return att_read_req(conn_handle, self->handle, rsp);
+            return 0; // FIX
+        } else {
+            mp_buffer_info_t bufinfo;
+            if (!mp_get_buffer(self->value, &bufinfo, MP_BUFFER_READ)) {
+                return 0;
+            }
+            const size_t actual_length = MIN(len, bufinfo.len);
+            memcpy(buf, bufinfo.buf, actual_length);
+            return actual_length;
+        }
+    }
+
+    return 0;
+}
+
+void common_hal_bleio_characteristic_set_value(bleio_characteristic_obj_t *self, mp_buffer_info_t *bufinfo) {
+    if (self->fixed_length && bufinfo->len != self->max_length) {
+        mp_raise_ValueError(translate("Value length != required fixed length"));
+    }
+    if (bufinfo->len > self->max_length) {
+        mp_raise_ValueError(translate("Value length > max_length"));
+    }
+
+    // Do GATT operations only if this characteristic has been added to a registered service.
+    if (self->handle != BLE_GATT_HANDLE_INVALID) {
+        if (common_hal_bleio_service_get_is_remote(self->service)) {
+            // FIX uint16_t conn_handle = bleio_connection_get_conn_handle(self->service->connection);
+            if (self->props & CHAR_PROP_WRITE) {
+                // FIX writing remote chars
+                // uint8_t rsp[sizeof(bt_att_error_rsp)];
+                // att_write_req(conn_handle, self->handle, bufinfo->buf, bufinfo->len, rsp);
+            } else if (self->props & CHAR_PROP_WRITE_NO_RESPONSE) {
+                // att_write_cmd(conn_handle, self->handle, bufinfo->buff, bufinfo->len);
+            } else {
+                mp_raise_bleio_BluetoothError(translate("Characteristic not writable"));
+            }
+        } else {
+            // Always write the value locally even if no connections are active.
+            bleio_characteristic_set_local_value(self, bufinfo);
+            // Notify or indicate all active connections.
+
+            uint16_t cccd_value = 0;
+            mp_buffer_info_t cccd_bufinfo = {
+                .buf = &cccd_value,
+                .len = sizeof(cccd_value),
+            };
+
+            const bool notify = self->props & CHAR_PROP_NOTIFY;
+            const bool indicate = self->props & CHAR_PROP_INDICATE;
+            // Read the CCCD value, if there is one.
+            if ((notify | indicate) && self->cccd != NULL) {
+                common_hal_bleio_descriptor_get_value(self->cccd, cccd_bufinfo.buf, cccd_bufinfo.len);
+            }
+
+            // It's possible that both notify and indicate are set.
+            if (notify && (cccd_value & CCCD_NOTIFY)) {
+                att_notify(self->handle, bufinfo->buf, MIN(bufinfo->len, self->max_length));
+            }
+            if (indicate && (cccd_value & CCCD_INDICATE)) {
+                att_indicate(self->handle, bufinfo->buf, MIN(bufinfo->len, self->max_length));
+
+            }
+        }
+    }
+}
+
+bleio_uuid_obj_t *common_hal_bleio_characteristic_get_uuid(bleio_characteristic_obj_t *self) {
+    return self->uuid;
+}
+
+bleio_characteristic_properties_t common_hal_bleio_characteristic_get_properties(bleio_characteristic_obj_t *self) {
+    return self->props;
+}
+
+void common_hal_bleio_characteristic_add_descriptor(bleio_characteristic_obj_t *self, bleio_descriptor_obj_t *descriptor) {
+    if (self->handle != common_hal_bleio_adapter_obj.last_added_characteristic_handle) {
+        mp_raise_bleio_BluetoothError(
+            translate("Descriptor can only be added to most recently added characteristic"));
+    }
+
+    descriptor->handle = bleio_adapter_add_attribute(&common_hal_bleio_adapter_obj, MP_OBJ_TO_PTR(descriptor));
+    // Include this descriptor in the service handle's range.
+    self->service->end_handle = descriptor->handle;
+
+    mp_obj_list_append(MP_OBJ_FROM_PTR(self->descriptor_list),
+        MP_OBJ_FROM_PTR(descriptor));
+}
+
+void common_hal_bleio_characteristic_set_cccd(bleio_characteristic_obj_t *self, bool notify, bool indicate) {
+    if (self->cccd == NULL) {
+        mp_raise_bleio_BluetoothError(translate("No CCCD for this Characteristic"));
+    }
+
+    if (!common_hal_bleio_service_get_is_remote(self->service)) {
+        mp_raise_bleio_RoleError(translate("Can't set CCCD on local Characteristic"));
+    }
+
+    const uint16_t conn_handle = bleio_connection_get_conn_handle(self->service->connection);
+    common_hal_bleio_check_connected(conn_handle);
+
+    uint16_t cccd_value =
+        (notify ? CCCD_NOTIFY : 0) |
+        (indicate ? CCCD_INDICATE : 0);
+
+    // FIX do remote
+    (void)cccd_value;
+    // uint8_t rsp[sizeof(bt_att_error_rsp)];
+    // if (att_write_req(conn_handle, self->cccd->handle, &cccd_value, sizeof(cccd_value)) == 0) {
+    //     mp_raise_bleio_BluetoothError(translate("Could not write CCCD"));
+    // }
+}
+
+bool bleio_characteristic_set_local_value(bleio_characteristic_obj_t *self, mp_buffer_info_t *bufinfo) {
+    if (self->fixed_length && bufinfo->len != self->max_length) {
+        return false;
+    }
+    if (bufinfo->len > self->max_length) {
+        return false;
+    }
+
+    self->value = mp_obj_new_bytes(bufinfo->buf, bufinfo->len);
+
+    if (mp_obj_is_type(self->observer, &bleio_characteristic_buffer_type)) {
+        bleio_characteristic_buffer_update(MP_OBJ_FROM_PTR(self->observer), bufinfo);
+    } else if (mp_obj_is_type(self->observer, &bleio_packet_buffer_type)) {
+        bleio_packet_buffer_update(MP_OBJ_FROM_PTR(self->observer), bufinfo);
+    } else {
+        return false;
+    }
+    return true;
+}
+
+void bleio_characteristic_set_observer(bleio_characteristic_obj_t *self, mp_obj_t observer) {
+    self->observer = observer;
+}
+
+void bleio_characteristic_clear_observer(bleio_characteristic_obj_t *self) {
+    self->observer = mp_const_none;
+}