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-rw-r--r--binding/slimamp/slimamp.c110
1 files changed, 110 insertions, 0 deletions
diff --git a/binding/slimamp/slimamp.c b/binding/slimamp/slimamp.c
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--- /dev/null
+++ b/binding/slimamp/slimamp.c
@@ -0,0 +1,110 @@
+/*
+ * Copyright 2019 Microchip Technology Inc. and its subsidiaries
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#define _GNU_SOURCE
+#ifndef AFB_BINDING_VERSION
+# define AFB_BINDING_VERSION 3
+#endif
+
+#include <stdio.h>
+#include <string.h>
+#include <afb/afb-binding.h>
+#include <wrap-json.h>
+#include "wrap-unicens.h"
+
+#define NODE_ID ((uint16_t)0x270U)
+#define CONTROL_MASTER 0x07U
+#define MUTE_VALUE 0x03FFU
+#define MUTE_VALUE_HB 0x03U
+#define MUTE_VALUE_LB 0xFFU
+#define TX_PAYLOAD_SZ 3U
+
+static uint8_t _tx_payload[TX_PAYLOAD_SZ] = {CONTROL_MASTER, MUTE_VALUE_HB, MUTE_VALUE_LB};
+static bool _available = false;
+
+/*****************************************************************************
+ * Local prototypes
+ */
+static int slimamp_master_volume_set(uint8_t volume);
+static int get_payload_master_volume(uint8_t sys_vol, uint8_t *payload_ptr, uint8_t payload_sz);
+
+/*****************************************************************************
+ * API
+ */
+
+extern void slimamp_availablility_changed(uint16_t node_id, bool available) {
+ if (node_id == NODE_ID) {
+ _available = available;
+ }
+}
+
+static int slimamp_master_volume_set(uint8_t volume) {
+ if (_available == false)
+ AFB_API_NOTICE(afbBindingRoot, "%s: node is not available", __func__);
+ return -1;
+
+ if (volume > 100U)
+ return -2; // parameter error
+
+ if (get_payload_master_volume(volume, _tx_payload, TX_PAYLOAD_SZ) != 0)
+ return -3; // calculation error
+
+ // fire message now
+ AFB_API_DEBUG(afbBindingRoot, "%s: calculated payload: {%02X,%02X,%02X}", __func__, _tx_payload[0], _tx_payload[1], _tx_payload[2]);
+ wrap_ucs_i2cwrite_sync(NODE_ID, _tx_payload, TX_PAYLOAD_SZ);
+
+ return 0;
+}
+
+/*****************************************************************************
+ * Device specific helper functions
+ */
+
+static int get_payload_master_volume(uint8_t sys_vol, uint8_t *payload_ptr, uint8_t payload_sz) {
+ if (payload_sz < 3U)
+ return -1;
+
+ uint16_t tmp = (uint16_t)(0x100U + 0x2FFU - (((int32_t)0x2FFU * (int32_t)sys_vol) / (int32_t)100/*max volume*/));
+ payload_ptr[0] = CONTROL_MASTER;
+ payload_ptr[1] = (uint8_t)((tmp >> 8U) & (uint16_t)0xFFU); //HB:Volume
+ payload_ptr[2] = (uint8_t)(tmp & (uint16_t)0xFFU); //LB:Volume
+ return 0;
+}
+
+/*****************************************************************************
+ * JSON API
+ */
+
+extern void slimamp_master_vol_set_api(afb_req_t request) {
+ int volume = 0;
+ struct json_object* j_obj = afb_req_json(request);
+
+ AFB_API_DEBUG(afbBindingRoot, "UNICENS-CONTROLLER: %s:%s", __func__, json_object_get_string(j_obj));
+
+ if (wrap_json_unpack(j_obj, "{s:i}", "value", &volume) == 0) {
+ AFB_API_DEBUG(afbBindingRoot, "UNICENS-CONTROLLER: decoded value=%d", volume);
+
+ if ((volume >= 0) && (volume <= 100)) {
+ slimamp_master_volume_set((uint8_t)volume);
+ afb_req_success(request, NULL, NULL);
+ }
+ else {
+ afb_req_fail(request, "invalid range of parameter 'value'", NULL);
+ }
+ }
+ else {
+ afb_req_fail(request, "missing argument 'value'", NULL);
+ }
+} \ No newline at end of file