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Diffstat (limited to 'binding/slimamp/slimamp.c')
| -rw-r--r-- | binding/slimamp/slimamp.c | 110 |
1 files changed, 110 insertions, 0 deletions
diff --git a/binding/slimamp/slimamp.c b/binding/slimamp/slimamp.c new file mode 100644 index 0000000..1e4f012 --- /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); + } +}
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