#include <stdint.h>
#include <stdio.h>
#include <string.h>

#include "fr30xx.h"

#include "co_util.h"

#include "bt_types.h"
#include "me_api.h"
#include "hfg_api.h"
#include "gatt_api.h"

#include "app_at.h"
#include "app_task.h"
#include "app_ble.h"
#include "app_bt.h"
#include "app_audio.h"
#include "btdm_mem.h"
#include "fdb_app.h"
#include "user_bt.h"
#include "dsp_mem.h"
#include "heap.h"

#define AT_RECV_MAX_LEN             32

static uint8_t app_at_recv_char;
static uint8_t at_recv_buffer[AT_RECV_MAX_LEN];
static uint8_t at_recv_index = 0;
static uint8_t at_recv_state = 0;

void btdm_host_send_vendor_cmd(uint8_t type, uint8_t length, void *data);

void btdm_host_vendor_cmd_cmp_evt(uint8_t status, uint8_t len, uint8_t const *param)
{
    printf("status: 0x%02x.\r\n", status);
    for (uint32_t i=0; i<len; i++) {
        printf("%02x ", param[i]);
    }
    printf("\r\n");
}

static void app_at_recv_cmd_A(uint8_t sub_cmd, uint8_t *data)
{
    switch(sub_cmd)
    {
//        case 'A':
//            {
//                mac_addr_t addr;
//                addr.addr[5] = ascii_strn2val((const char *)&data[0], 16, 2);
//                addr.addr[4] = ascii_strn2val((const char *)&data[2], 16, 2);
//                addr.addr[3] = ascii_strn2val((const char *)&data[4], 16, 2);
//                addr.addr[2] = ascii_strn2val((const char *)&data[6], 16, 2);
//                addr.addr[1] = ascii_strn2val((const char *)&data[8], 16, 2);
//                addr.addr[0] = ascii_strn2val((const char *)&data[10], 16, 2);
//                gap_start_conn(&addr, ascii_strn2val((const char *)&data[12], 16, 2), 64, 64, 0, 500);
//            }
//            break;
//        case 'B':
//            {
//                gap_stop_conn();
//            }
//            break;
        case 'A':
            {
                uint8_t addr = ascii_strn2val((const char *)&data[0], 16, 2);
                btdm_host_send_vendor_cmd(0x00, 1, &addr);
            }
            printf("OK\r\n");
            break;
        case 'B':
            {
                uint8_t buffer[2];
                buffer[0] = ascii_strn2val((const char *)&data[0], 16, 2);
                buffer[1] = ascii_strn2val((const char *)&data[3], 16, 2);
                btdm_host_send_vendor_cmd(0x01, 2, (void *)&buffer[0]);
            }
            printf("OK\r\n");
            break;
        case 'C':
            {
                uint32_t addr = ascii_strn2val((const char *)&data[0], 16, 8);
                btdm_host_send_vendor_cmd(0x02, 4, (void *)&addr);
            }
            printf("OK\r\n");
            break;
        case 'D':
            {
                uint32_t buffer[2];
                buffer[0] = ascii_strn2val((const char *)&data[0], 16, 8);
                buffer[1] = ascii_strn2val((const char *)&data[9], 16, 8);
                btdm_host_send_vendor_cmd(0x03, 8, (void *)&buffer[0]);
            }
            printf("OK\r\n");
            break;
        case 'G':
            printf("hello world!\r\n");
            break;
        case 'H':
            printf("VAL: 0x%08x.\r\n", *(volatile uint32_t *)ascii_strn2val((const char *)&data[0], 16, 8));
            break;
        case 'I':
            *(volatile uint32_t *)ascii_strn2val((const char *)&data[0], 16, 8) = ascii_strn2val((const char *)&data[9], 16, 8);
            printf("OK\r\n");
            break;
        case 'J':
            printf("OOL VAL: 0x%02x.\r\n", ool_read(ascii_strn2val((const char *)&data[0], 16, 2)));
            break;
        case 'K':
            ool_write(ascii_strn2val((const char *)&data[0], 16, 2), ascii_strn2val((const char *)&data[3], 16, 2));
            printf("OK\r\n");
            break;
        case 'L':
            printf("VAL: 0x%02x.\r\n", *(volatile uint8_t *)(ascii_strn2val((const char *)&data[0], 16, 8)));
            break;
        case 'M':
            *(volatile uint8_t *)(ascii_strn2val((const char *)&data[0], 16, 8)) = ascii_strn2val((const char *)&data[9], 16, 2);
            printf("OK\r\n");
            break;
//        case 'P':
//            co_printf("VAL: 0x%02x.\r\n", *(uint8_t *)(MODEM_BASE + ascii_strn2val((const char *)&data[0], 16, 2)));
//            break;
//        case 'Q':
//            *(uint8_t *)(MODEM_BASE + ascii_strn2val((const char *)&data[0], 16, 2)) = ascii_strn2val((const char *)&data[3], 16, 2);
//            co_printf("OK\r\n");
//            break;
//        case 'S':
//            co_printf("VAL: 0x%02x.\r\n", frspim_rd(FR_SPI_RF_COB_CHAN, ascii_strn2val((const char *)&data[0], 16, 2), 1));
//            break;
//        case 'T':
//            frspim_wr(FR_SPI_RF_COB_CHAN, ascii_strn2val((const char *)&data[0], 16, 2), 1, ascii_strn2val((const char *)&data[3], 16, 2));
//            co_printf("OK\r\n");
//            break;
        case 'U':
            {
                uint32_t *ptr = (uint32_t *)(ascii_strn2val((const char *)&data[0], 16, 8) & (~3));
                uint8_t count = ascii_strn2val((const char *)&data[9], 16, 2);
                uint32_t *start = (uint32_t *)((uint32_t)ptr & (~0x0f));
                for(uint8_t i=0; i<count;) {
                    if(((uint32_t)start & 0x0c) == 0) {
                        printf("0x%08x: ", (uint32_t)start);
                    }
                    if(start < ptr) {
                        printf("        ");
                    }
                    else {
                        i++;
                        printf("%08x", *start);
                    }
                    if(((uint32_t)start & 0x0c) == 0x0c) {
                        printf("\r\n");
                    }
                    else {
                        printf(" ");
                    }
                    start++;
                }
            }
            break;
        case 'V':
            flash_erase(QSPI0, ascii_strn2val((const char *)&data[0], 16, 8), ascii_strn2val((const char *)&data[9], 16, 8));
            break;
        case 'W':
            {
                uint32_t curr_free, min_free;
                dsp_mem_get_usage(&curr_free, &min_free);
                printf("DSP MEM: %d, %d\r\n", curr_free, min_free);
            }
            break;
        case 'X':
            {
                void system_reset(void);
                system_reset();
            }
            break;
        case 'Y':
            heap_dump_used_mem(ascii_strn2val((const char *)&data[0], 16, 2));
            break;
        case 'Z':
            printf("MEM usage\r\n \
                    \tHEAP_TYPE_SRAM_BLOCK: %d, %d\r\n \
                    \tHEAP_TYPE_DRAM_BLOCK: %d, %d\r\n \
                    \tHEAP_TYPE_BTDM_BLOCK: %d, %d\r\n \
                    \tTOTAL USAGE: %d\r\n", \
                            heap_get_mem_usage(HEAP_TYPE_SRAM_BLOCK), heap_get_mem_usage_single(HEAP_TYPE_SRAM_BLOCK), \
                            heap_get_mem_usage(HEAP_TYPE_DRAM_BLOCK), heap_get_mem_usage_single(HEAP_TYPE_DRAM_BLOCK), \
                            heap_get_mem_usage(HEAP_TYPE_BTDM_BLOCK), heap_get_mem_usage_single(HEAP_TYPE_BTDM_BLOCK), \
                            heap_get_max_mem_usage());
            break;
        default:
            break;
    }
}

static void user_hci_callback(const BtEvent *event)
{
    printf("event type = %d\r\n",event->eType);
    if(event->eType == BTEVENT_COMMAND_COMPLETE){
        btdm_free(event->p.meToken);
    }
}
static void app_at_recv_cmd_B(uint8_t sub_cmd, uint8_t *data)
{
    struct gap_ble_addr peer_addr;
    BD_ADDR addr;
    HfgResponse *rsp;
    BtStatus status;
    MeCommandToken *token;
    uint16_t page_timeout = 0x400;
    
    switch(sub_cmd) {
        case 'A':
            // AT#BA00
            //app_ble_start_advertising(ascii_strn2val((const char *)&data[0], 16, 2));
            break;
        case 'B':
            // AT#BB01
            //app_ble_stop_advertising(ascii_strn2val((const char *)&data[0], 16, 2));
            break;
        case 'C':
            app_ble_scan_start();
            break;
        case 'D':
            app_ble_scan_stop();
            break;
        case 'E':
            // AT#BE0123456789ab_01
            peer_addr.addr.addr[5] = ascii_strn2val((const char *)&data[0], 16, 2);
            peer_addr.addr.addr[4] = ascii_strn2val((const char *)&data[2], 16, 2);
            peer_addr.addr.addr[3] = ascii_strn2val((const char *)&data[4], 16, 2);
            peer_addr.addr.addr[2] = ascii_strn2val((const char *)&data[6], 16, 2);
            peer_addr.addr.addr[1] = ascii_strn2val((const char *)&data[8], 16, 2);
            peer_addr.addr.addr[0] = ascii_strn2val((const char *)&data[10], 16, 2);
            peer_addr.addr_type = ascii_strn2val((const char *)&data[13], 16, 2);
            app_ble_conn_start(&peer_addr);
            break;
        case 'F':
            app_ble_conn_stop();
            break;
#if BTDM_STACK_ENABLE_BT == 1
        case 'H':
            ME_Inquiry(BT_IAC_GIAC, 5, 5);
            break;
        case 'I':
            ME_CancelInquiry();
            break;
        case 'J':
            {
                BtStatus       status;
                addr.A[0] = ascii_strn2val((const char*)&data[0],16,2);
                addr.A[1] = ascii_strn2val((const char*)&data[2],16,2);
                addr.A[2] = ascii_strn2val((const char*)&data[4],16,2);
                addr.A[3] = ascii_strn2val((const char*)&data[6],16,2);
                addr.A[4] = ascii_strn2val((const char*)&data[8],16,2);
                addr.A[5] = ascii_strn2val((const char*)&data[10],16,2);
                
                status = HFG_CreateServiceLink(&hfg_channel[0], &addr);
                
                if (status == BT_STATUS_PENDING) {
                    printf("Opening Channel...\r\n");
                } else {
                    printf("Could not open channel, status: %d\r\n", status);
                }
            }
            break;
        case 'K':
            status = BT_STATUS_NO_RESOURCES;
            rsp = (HfgResponse *)btdm_malloc(sizeof(HfgResponse));
            if(rsp != NULL){
                status = HFG_CreateCodecConnection(&hfg_channel[0], 1, rsp);
            }
            if(status != BT_STATUS_PENDING){
                btdm_free((void *)rsp);
            }
            printf("status = %d\r\n",status);
            break;
        case 'L':
            flashdb_del(FDB_KEY_BT_LINKKEY);

            break;
        case 'M':
            token = btdm_malloc(sizeof(MeCommandToken));
            token->p.general.in.hciCommand = 0x0c18;//HCC_WRITE_PAGE_TIMEOUT;
            token->p.general.in.parmLen = 2;
            token->p.general.in.parms = (uint8_t *)&page_timeout;
            token->callback = user_hci_callback;    //token is freed at this callback
            status = ME_SendHciCommandAsync(token);
            printf("status = %d\r\n",status);
            break;
        case 'N':
            {
                addr.A[0] = ascii_strn2val((const char*)&data[0],16,2);
                addr.A[1] = ascii_strn2val((const char*)&data[2],16,2);
                addr.A[2] = ascii_strn2val((const char*)&data[4],16,2);
                addr.A[3] = ascii_strn2val((const char*)&data[6],16,2);
                addr.A[4] = ascii_strn2val((const char*)&data[8],16,2);
                addr.A[5] = ascii_strn2val((const char*)&data[10],16,2);
                user_bt_env.connect_times = 3;
                status = bt_connect(&addr);
                printf("status = %d\r\n",status);
            }
            break;
#endif
        case 'O':
//            {
//                uint8_t battery_level[15] = {1,2,3,4,5,6,7,8,9,10,11,12,13,14,15};
//                struct gatt_send_event ntf[6];
//                uint8_t i=0;
//                for(i=0;i<6;i++){
//                    ntf[i].conidx = 0;
//                    ntf[i].svc_id = svc_id;
//                    ntf[i].att_idx = 2;
//                    ntf[i].data_len = 15;
//                    ntf[i].p_data = &battery_level[0];
//                    gatt_notification(&ntf[i]);
//                }
//            }
            break;
        case 'P':
            addr.A[0] = ascii_strn2val((const char*)&data[0],16,2);
            addr.A[1] = ascii_strn2val((const char*)&data[2],16,2);
            addr.A[2] = ascii_strn2val((const char*)&data[4],16,2);
            addr.A[3] = ascii_strn2val((const char*)&data[6],16,2);
            addr.A[4] = ascii_strn2val((const char*)&data[8],16,2);
            addr.A[5] = ascii_strn2val((const char*)&data[10],16,2);
            bt_disconnect(&addr,false);
        break;
        
        case 'Q':
            addr.A[0] = ascii_strn2val((const char*)&data[0],16,2);
            addr.A[1] = ascii_strn2val((const char*)&data[2],16,2);
            addr.A[2] = ascii_strn2val((const char*)&data[4],16,2);
            addr.A[3] = ascii_strn2val((const char*)&data[6],16,2);
            addr.A[4] = ascii_strn2val((const char*)&data[8],16,2);
            addr.A[5] = ascii_strn2val((const char*)&data[10],16,2);
            bt_disconnect(&addr,true);
        break;
        
        case 'R':
//            ME_SetLocalDeviceName((const uint8_t *)"FR30xx_m", sizeof("FR30xx_m"));
            //app_btdm_init();

            break;
        case 'S':
        {
            BtAccessModeInfo access_mode_nc = {
                .inqInterval = 0x800,
                .inqWindow = 0x12,
                .pageInterval = 0x800,
                .pageWindow = 0x12,
            };
            status = bt_enter_pairing(BAM_GENERAL_ACCESSIBLE, &access_mode_nc);
            printf("status = %d\r\n",status);
        }
            break;
        case 'T':
        {
            status = bt_exit_pairing();
            printf("status = %d\r\n",status);

        }
            break;
        case 'U':
        {
            addr.A[0] = ascii_strn2val((const char*)&data[0],16,2);
            addr.A[1] = ascii_strn2val((const char*)&data[2],16,2);
            addr.A[2] = ascii_strn2val((const char*)&data[4],16,2);
            addr.A[3] = ascii_strn2val((const char*)&data[6],16,2);
            addr.A[4] = ascii_strn2val((const char*)&data[8],16,2);
            addr.A[5] = ascii_strn2val((const char*)&data[10],16,2);
            bt_exit_pairing();
            bt_connect(&addr);        
        }

            break;
    }
    
    printf("OK\r\n");
}

uint8_t voltage_str[] = "AT+IPHONEACCEV=1,1,6";
uint8_t cmps_str[] = "AT+CPMS=?";
uint8_t clk_str[] = "AT+CCLK=?";
//bt hf&pbap related cmd
static void app_at_recv_cmd_C(uint8_t sub_cmd, uint8_t *data)
{
    BtStatus status;
    BD_ADDR addr;
    switch(sub_cmd) {
        case 'A':
            status = bt_answer_call(user_bt_env.last_active_index);
            printf("status = %d\r\n",status);
            break;
        case 'B':
            status = bt_hang_up(user_bt_env.last_active_index);
            printf("status = %d\r\n",status);
            break;
        case 'C':
            status = bt_redial(user_bt_env.last_active_index);
            printf("status = %d\r\n",status);
            break;
        case 'D':
        {
            uint8_t number[] = "10086";
            status = bt_dial_number(user_bt_env.last_active_index,number,sizeof(number));
            printf("status = %d\r\n",status);
        }
        break;
        case 'E':
            status = bt_list_current_calls(user_bt_env.last_active_index);
            printf("status = %d\r\n",status);
            break;
        case 'F':
            status = bt_transfer_sco(user_bt_env.last_active_index);
            printf("status = %d\r\n",status);
            break;
        case 'G':
        {
            uint8_t dtmf = data[0];
            status = bt_send_dtmf(user_bt_env.last_active_index,dtmf);
            printf("status = %d\r\n",status);        
        }
            break;       
        case 'H':
        {
            //vol---[0x00,0x0f]
            uint8_t vol = ascii_strn2val((const char*)&data[0],16,2);
            status = bt_report_spk_volume(user_bt_env.last_active_index,vol);
            printf("status = %d\r\n",status);        
        }
            break;         
        case 'I':
        {
            status = bt_send_hf_cmd(user_bt_env.last_active_index,voltage_str);
            printf("status = %d\r\n",status);        
        }
            break;    
        case 'J':
        {
            uint8_t enabled = ascii_strn2val((const char*)&data[0],16,2);
            status = bt_enable_voice_recognition(user_bt_env.last_active_index, enabled);
            printf("status = %d\r\n",status);
        }
            break;
        case 'K':
            printf("voice recog enabled : %d\r\n",bt_is_voice_rec_active(user_bt_env.last_active_index));
            break;
        
        case 'L':
//            addr.A[0] = ascii_strn2val((const char*)&data[0],16,2);
//            addr.A[1] = ascii_strn2val((const char*)&data[2],16,2);
//            addr.A[2] = ascii_strn2val((const char*)&data[4],16,2);
//            addr.A[3] = ascii_strn2val((const char*)&data[6],16,2);
//            addr.A[4] = ascii_strn2val((const char*)&data[8],16,2);
//            addr.A[5] = ascii_strn2val((const char*)&data[10],16,2);
            if(user_bt_get_state(user_bt_env.last_active_index) >= BT_STATE_CONNECTED){
                printf("pbap client %d\r\n",pbap_client[user_bt_env.last_active_index].cApp.connState);
                status = PBAP_ClientConnect(&pbap_client[user_bt_env.last_active_index],&user_bt_env.dev[user_bt_env.last_active_index].remote_bd);
                if(status == BT_STATUS_PENDING){
                    user_bt_env.dev[user_bt_env.last_active_index].pbap_client = &pbap_client[user_bt_env.last_active_index];
                }
            }
            printf("status = %d\r\n",status);
            break;
        case 'M':
            status = PBAP_ClientDisconnect(&pbap_client[user_bt_env.last_active_index]);
            printf("status = %d\r\n",status);
            break;
        case 'N':
        {
            uint8_t pbName[64];
            PbapPullPbParms     parms;
            
            memcpy(pbName,PB_LOCAL_MCH_NAME,sizeof(PB_LOCAL_MCH_NAME));
            parms.pbName = pbName;
            memset(parms.filter.byte,0,PBAP_FILTER_SIZE);
            parms.filter.byte[0] = 0x84;
            parms.listStartOffset = 0;
            parms.maxListCount = 4; //0---search missed call and total pb size
            parms.format= VCARD_FORMAT_30;
            status = PBAP_PullPhonebook(&pbap_client[0], &parms);       
            printf("status = %d\r\n",status);        
        }
            break;
        case 'O':
        {
            PbapPullVcardListingParms   parms;
            uint8_t search_val[12]; //= "13262651013";
            memcpy(search_val,&data[0],11);
            uint8_t folder[] = "telecom/pb";
            parms.folderName = folder;
            parms.order = VCARD_SORT_ORDER_INDEXED;
            parms.listStartOffset = 0x00;
            parms.maxListCount = 4;
            parms.searchAttribute = VCARD_SEARCH_ATTRIB_NUMBER;
            parms.searchValue = search_val;
            status = PBAP_PullVcardListing(&pbap_client[0], &parms);       
            printf("status = %d\r\n",status);        
        }
            break;
        case 'P':
        {
            uint8_t pbName[64];
            PbapPullPbParms     parms;
            
            memcpy(pbName,PB_LOCAL_STORE_NAME,sizeof(PB_LOCAL_STORE_NAME));
            parms.pbName = pbName;
            memset(parms.filter.byte,0,PBAP_FILTER_SIZE);
            parms.filter.byte[0] = 0x07;//0x84;
            parms.listStartOffset = 0;
            parms.maxListCount = 20; //0---search missed call and total pb size
            parms.format= VCARD_FORMAT_30;
            status = PBAP_PullPhonebook(&pbap_client[0], &parms);       
            printf("status = %d\r\n",status);
        }
            break;
        
        case 'X':
        {
            uint8_t mute_str[] = "AT+CMUT=1";
            status = bt_send_hf_cmd(user_bt_env.last_active_index,mute_str);
            printf("status = %d\r\n",status);        
        }
            break;
        case 'Y':
        {
            
            status = bt_send_hf_cmd(user_bt_env.last_active_index,clk_str);
            printf("status = %d\r\n",status);        
        }
        case 'Z':
        {
            uint8_t mute_str[] = "AT+CCLK?";
            status = bt_send_hf_cmd(user_bt_env.last_active_index,mute_str);
            printf("status = %d\r\n",status);        
        }
            break;
        default:
            break;
    }
    printf("OK\r\n");
}

///bt media related cmd
static void app_at_recv_cmd_E(uint8_t sub_cmd, uint8_t *data)
{
    BD_ADDR addr;
    BtStatus status;
    switch(sub_cmd) {
        case 'A':
            status = AVRCP_SetPanelKey(user_bt_env.dev[user_bt_env.last_active_index].rcp_chan, AVRCP_POP_PLAY, TRUE);
            printf("status = %d\r\n",status);
            break;
        case 'B':
            status = AVRCP_SetPanelKey(user_bt_env.dev[user_bt_env.last_active_index].rcp_chan, AVRCP_POP_PAUSE, TRUE);
            printf("status = %d\r\n",status);
            break;
        case 'C':
            status = AVRCP_SetPanelKey(user_bt_env.dev[user_bt_env.last_active_index].rcp_chan, AVRCP_POP_FORWARD, TRUE);
            printf("status = %d\r\n",status);
            break;
        case 'D':
        {
            status = AVRCP_SetPanelKey(user_bt_env.dev[user_bt_env.last_active_index].rcp_chan, AVRCP_POP_BACKWARD, TRUE);
            printf("status = %d\r\n",status);
        }
            break;
        case 'E':
        {
            uint8_t vol = ascii_strn2val((const char*)&data[0],16,2);
            status = bt_set_media_volume(user_bt_env.last_active_index,vol);
            printf("status = %d\r\n",status);
        }
            break;
        case 'F':
        {
            status = bt_get_media_info(user_bt_env.last_active_index,0x41);
            printf("status = %d\r\n",status);
        }
            break;
        case 'G':
        {
            status = bt_get_playstatus(user_bt_env.last_active_index);
            printf("status = %d\r\n",status);
        }
            break;       
        case 'H':
            addr.A[0] = ascii_strn2val((const char*)&data[0],16,2);
            addr.A[1] = ascii_strn2val((const char*)&data[2],16,2);
            addr.A[2] = ascii_strn2val((const char*)&data[4],16,2);
            addr.A[3] = ascii_strn2val((const char*)&data[6],16,2);
            addr.A[4] = ascii_strn2val((const char*)&data[8],16,2);
            addr.A[5] = ascii_strn2val((const char*)&data[10],16,2);
            status = spp_connect(&spp_dev[0],&addr);
            printf("status = %d\r\n",status);
            break;
        case 'I':
            status = spp_disconnect(&spp_dev[0]);
            printf("status = %d\r\n",status);
            break;
        case 'J':
        {
            uint8_t test_data[] = {'1','2','3','4'};
            status = spp_send(&spp_dev[0],test_data,sizeof(test_data));
            printf("status = %d\r\n",status);        
        }
            break;
        default:
            break;
    }
    printf("OK\r\n");
}

static void app_at_recv_cmd_D(uint8_t sub_cmd, uint8_t *data)
{
    switch(sub_cmd) {
        case 'A':
            flash_erase(QSPI0, ascii_strn2val((const char*)&data[0],16,8), 0x1000);
            break;
        default:
            break;
    }
    printf("OK\r\n");
}

void app_at_cmd_recv_handler(uint8_t *data, uint16_t length)
{
    switch(data[0])
    {
        case 'A':
            app_at_recv_cmd_A(data[1], &data[2]);
            break;
        case 'B':
            app_at_recv_cmd_B(data[1], &data[2]);
            break;
        case 'C':
            app_at_recv_cmd_C(data[1], &data[2]);
            break;
        case 'D':
            app_at_recv_cmd_D(data[1], &data[2]);
            break;
        case 'E':
            app_at_recv_cmd_E(data[1], &data[2]);
            break;
        default:
            break;
    }
}

static void app_at_recv_c(uint8_t c)
{
    switch(at_recv_state)
    {
        case 0:
            if(c == 'A')
            {
                at_recv_state++;
            }
            break;
        case 1:
            if(c == 'T')
                at_recv_state++;
            else
                at_recv_state = 0;
            break;
        case 2:
            if(c == '#')
                at_recv_state++;
            else
                at_recv_state = 0;
            break;
        case 3:
            at_recv_buffer[at_recv_index++] = c;
            if((c == '\n')
               ||(at_recv_index >= AT_RECV_MAX_LEN))
            {
                struct app_task_event *event;
                event = app_task_event_alloc(APP_TASK_EVENT_AT_CMD, at_recv_index, false);
                if(event) {
                    memcpy(event->param, at_recv_buffer, at_recv_index);
                    app_task_event_post(event, false);
                }
                at_recv_state = 0;
                at_recv_index = 0;
            }
            break;
    }
}

void app_at_rx_done(struct __UART_HandleTypeDef *handle)
{
    app_at_recv_c(app_at_recv_char);
    if (handle) {
        uart_receive_IT(handle, &app_at_recv_char, 1);
    }
}

void app_at_init(struct __UART_HandleTypeDef *handle)
{
    uart_receive_IT(handle, &app_at_recv_char, 1);
}