1 /* 2 * hci.h 3 * 4 * Created by Matthias Ringwald on 4/29/09. 5 * 6 */ 7 8 #pragma once 9 10 #include <stdint.h> 11 #include <stdlib.h> 12 13 #include "hci_transport.h" 14 15 16 // helper for BT little endian format 17 #define READ_BT_16( buffer, pos) (buffer[pos] | (buffer[pos+1] << 8)) 18 #define READ_BT_24( buffer, pos) ( ((uint32_t) buffer[pos]) | (((uint32_t)buffer[pos+1]) << 8) | (((uint32_t)buffer[pos+2]) << 16)) 19 #define READ_BT_32( buffer, pos) ( ((uint32_t) buffer[pos]) | (((uint32_t)buffer[pos+1]) << 8) | (((uint32_t)buffer[pos+2]) << 16) | (((uint32_t) buffer[pos+3])) << 24) 20 21 // #define STORE_BT_16( buffer, pos, value ) { buffer[pos] = (value) & 0xff; buffer[pos+1] = (value) >> 8; } 22 23 24 // packet headers 25 #define HCI_CMD_DATA_PKT_HDR 0x03 26 #define HCI_ACL_DATA_PKT_HDR 0x04 27 #define HCI_SCO_DATA_PKT_HDR 0x03 28 #define HCI_EVENT_PKT_HDR 0x02 29 30 31 // Events from host controller to host 32 #define HCI_EVENT_INQUIRY_COMPLETE 0x01 33 #define HCI_EVENT_INQUIRY_RESULT 0x02 34 #define HCI_EVENT_CONNECTION_COMPLETE 0x03 35 #define HCI_EVENT_CONNECTION_REQUEST 0x04 36 #define HCI_EVENT_DISCONNECTION_COMPLETE 0x05 37 #define HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT 0x06 38 #define HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 0x07 39 #define HCI_EVENT_ENCRIPTION_CHANGE 0x08 40 #define HCI_EVENT_CHANGE_CONNECTION_LINK_KEY_COMPLETE 0x09 41 #define HCI_EVENT_MASTER_LINK_KEY_COMPLETE 0x0A 42 #define HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE 0x0B 43 #define HCI_EVENT_READ_REMOTE_VERSION_INFORMATION_COMPLETE 0x0C 44 #define HCI_EVENT_QOS_SETUP_COMPLETE 0x0D 45 #define HCI_EVENT_COMMAND_COMPLETE 0x0E 46 #define HCI_EVENT_COMMAND_STATUS 0x0F 47 #define HCI_EVENT_HARDWARE_ERROR 0x10 48 #define HCI_EVENT_FLUSH_OCCURED 0x11 49 #define HCI_EVENT_ROLE_CHANGE 0x12 50 #define HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS 0x13 51 #define HCI_EVENT_MODE_CHANGE_EVENT 0x14 52 #define HCI_EVENT_RETURN_LINK_KEYS 0x15 53 #define HCI_EVENT_PIN_CODE_REQUEST 0x16 54 #define HCI_EVENT_LINK_KEY_REQUEST 0x17 55 #define HCI_EVENT_LINK_KEY_NOTIFICATION 0x18 56 #define HCI_EVENT_DATA_BUFFER_OVERFLOW 0x1A 57 #define HCI_EVENT_MAX_SLOTS_CHANGED 0x1B 58 #define HCI_EVENT_READ_CLOCK_OFFSET_COMPLETE 0x1C 59 #define NECTEVENT_ION_PACKET_TYPE_CHANGED 0x1D 60 #define HCI_EVENT_INQUIRY_RESULT_WITH_RSSI 0x22 61 #define HCI_EVENT_VENDOR_SPECIFIC 0xFF 62 63 // events from BTstack for application/client lib 64 #define BTSTACK_EVENT_HCI_WORKING 0x80 65 66 #define COMMAND_COMPLETE_EVENT(event,cmd) ( event[0] == HCI_EVENT_COMMAND_COMPLETE && READ_BT_16(event,3) == cmd.opcode) 67 68 /** 69 * @brief Length of a bluetooth device address. 70 */ 71 #define BD_ADDR_LEN 6 72 typedef uint8_t bd_addr_t[BD_ADDR_LEN]; 73 74 /** 75 * @brief The link key type 76 */ 77 #define LINK_KEY_LEN 16 78 typedef uint8_t link_key_t[LINK_KEY_LEN]; 79 80 /** 81 * @brief hci connection handle type 82 */ 83 typedef uint16_t hci_con_handle_t; 84 85 typedef enum { 86 HCI_POWER_OFF = 0, 87 HCI_POWER_ON 88 } HCI_POWER_MODE; 89 90 typedef enum { 91 HCI_STATE_OFF = 0, 92 HCI_STATE_INITIALIZING, 93 HCI_STATE_WORKING, 94 HCI_STATE_HALTING 95 } HCI_STATE; 96 97 typedef struct { 98 uint16_t opcode; 99 const char *format; 100 } hci_cmd_t; 101 102 typedef enum { 103 SEND_NEGATIVE_LINK_KEY_REQUEST = 1 << 0, 104 SEND_PIN_CODE_RESPONSE = 1 << 1 105 } hci_connection_flags_t; 106 107 typedef struct hci_connection { 108 // linked list 109 struct hci_connection * next; 110 111 // remote side 112 bd_addr_t address; 113 hci_con_handle_t con_handle; 114 115 // hci state machine 116 hci_connection_flags_t flags; 117 118 } hci_connection_t; 119 120 121 typedef struct { 122 123 hci_transport_t * hci_transport; 124 uint8_t * hci_cmd_buffer; 125 hci_connection_t * connections; 126 127 /* host to controller flow control */ 128 uint8_t num_cmd_packets; 129 uint8_t num_acl_packets; 130 131 /* callback to L2CAP layer */ 132 void (*event_packet_handler)(uint8_t *packet, int size); 133 void (*acl_packet_handler) (uint8_t *packet, int size); 134 135 /* hci state machine */ 136 HCI_STATE state; 137 uint8_t substate; 138 uint8_t cmds_ready; 139 140 } hci_stack_t; 141 142 143 // set up HCI 144 void hci_init(hci_transport_t *transport, void *config); 145 146 void hci_register_event_packet_handler(void (*handler)(uint8_t *packet, int size)); 147 148 void hci_register_acl_packet_handler (void (*handler)(uint8_t *packet, int size)); 149 150 // power control 151 int hci_power_control(HCI_POWER_MODE mode); 152 153 /** 154 * run the hci daemon loop once 155 * 156 * @return 0 or next timeout 157 */ 158 uint32_t hci_run(); 159 160 // 161 void hexdump(uint8_t *data, int size); 162 163 // create and send hci command packet based on a template and a list of parameters 164 int hci_send_cmd(hci_cmd_t *cmd, ...); 165 166 // send ACL packet 167 int hci_send_acl_packet(uint8_t *packet, int size); 168 169 // helper 170 extern void bt_store_16(uint8_t *buffer, uint16_t pos, uint16_t value); 171 172 extern hci_cmd_t hci_inquiry; 173 extern hci_cmd_t hci_link_key_request_negative_reply; 174 extern hci_cmd_t hci_pin_code_request_reply; 175 extern hci_cmd_t hci_reset; 176 extern hci_cmd_t hci_create_connection; 177 extern hci_cmd_t hci_host_buffer_size; 178 extern hci_cmd_t hci_write_authentication_enable; 179 extern hci_cmd_t hci_write_page_timeout; 180 181 #define HCI_INQUIRY_LAP 0x9E8B33L // 0x9E8B33: General/Unlimited Inquiry Access Code (GIAC) 182