flipperzero-firmware/firmware/targets/f7/ble-glue/serial_service.c

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#include "serial_service.h"
#include "app_common.h"
#include "ble.h"
#include <furi.h>
#define SERIAL_SERVICE_TAG "serial service"
#define SERIAL_SVC_DATA_LEN_MAX 245
typedef struct {
uint16_t svc_handle;
uint16_t rx_char_handle;
uint16_t tx_char_handle;
} SerialSvc;
static SerialSvc* serial_svc;
static const uint8_t service_uuid[] = {0x00, 0x00, 0xfe, 0x60, 0xcc, 0x7a, 0x48, 0x2a, 0x98, 0x4a, 0x7f, 0x2e, 0xd5, 0xb3, 0xe5, 0x8f};
static const uint8_t char_rx_uuid[] = {0x00, 0x00, 0xfe, 0x61, 0x8e, 0x22, 0x45, 0x41, 0x9d, 0x4c, 0x21, 0xed, 0xae, 0x82, 0xed, 0x19};
static const uint8_t char_tx_uuid[] = {0x00, 0x00, 0xfe, 0x62, 0x8e, 0x22, 0x45, 0x41, 0x9d, 0x4c, 0x21, 0xed, 0xae, 0x82, 0xed, 0x19};
static SVCCTL_EvtAckStatus_t serial_svc_event_handler(void *event) {
SVCCTL_EvtAckStatus_t ret = SVCCTL_EvtNotAck;
hci_event_pckt* event_pckt = (hci_event_pckt *)(((hci_uart_pckt*)event)->data);
evt_blecore_aci* blecore_evt = (evt_blecore_aci*)event_pckt->data;
aci_gatt_attribute_modified_event_rp0* attribute_modified;
if(event_pckt->evt == HCI_VENDOR_SPECIFIC_DEBUG_EVT_CODE) {
if(blecore_evt->ecode == ACI_GATT_ATTRIBUTE_MODIFIED_VSEVT_CODE) {
attribute_modified = (aci_gatt_attribute_modified_event_rp0*)blecore_evt->data;
if(attribute_modified->Attr_Handle == serial_svc->tx_char_handle + 2) {
// Descriptor handle
ret = SVCCTL_EvtAckFlowEnable;
FURI_LOG_D(SERIAL_SERVICE_TAG, "TX descriptor event");
} else if(attribute_modified->Attr_Handle == serial_svc->tx_char_handle + 1) {
FURI_LOG_D(SERIAL_SERVICE_TAG, "Received %d bytes", attribute_modified->Attr_Data_Length);
serial_svc_update_rx(attribute_modified->Attr_Data, attribute_modified->Attr_Data_Length);
ret = SVCCTL_EvtAckFlowEnable;
}
} else if(blecore_evt->ecode == ACI_GATT_SERVER_CONFIRMATION_VSEVT_CODE) {
FURI_LOG_D(SERIAL_SERVICE_TAG, "Ack received", blecore_evt->ecode);
ret = SVCCTL_EvtAckFlowEnable;
}
}
return ret;
}
void serial_svc_start() {
tBleStatus status;
serial_svc = furi_alloc(sizeof(SerialSvc));
// Register event handler
SVCCTL_RegisterSvcHandler(serial_svc_event_handler);
// Add service
status = aci_gatt_add_service(UUID_TYPE_128, (Service_UUID_t *)service_uuid, PRIMARY_SERVICE, 6, &serial_svc->svc_handle);
if(status) {
FURI_LOG_E(SERIAL_SERVICE_TAG, "Failed to add Serial service: %d", status);
}
// Add TX characteristics
status = aci_gatt_add_char(serial_svc->svc_handle, UUID_TYPE_128, (const Char_UUID_t*)char_tx_uuid,
SERIAL_SVC_DATA_LEN_MAX,
CHAR_PROP_WRITE_WITHOUT_RESP | CHAR_PROP_WRITE | CHAR_PROP_READ,
ATTR_PERMISSION_NONE,
GATT_NOTIFY_ATTRIBUTE_WRITE,
10,
CHAR_VALUE_LEN_VARIABLE,
&serial_svc->tx_char_handle);
if(status) {
FURI_LOG_E(SERIAL_SERVICE_TAG, "Failed to add TX characteristic: %d", status);
}
// Add RX characteristic
status = aci_gatt_add_char(serial_svc->svc_handle, UUID_TYPE_128, (const Char_UUID_t*)char_rx_uuid,
SERIAL_SVC_DATA_LEN_MAX,
CHAR_PROP_READ | CHAR_PROP_INDICATE,
ATTR_PERMISSION_NONE,
GATT_DONT_NOTIFY_EVENTS,
10,
CHAR_VALUE_LEN_VARIABLE,
&serial_svc->rx_char_handle);
if(status) {
FURI_LOG_E(SERIAL_SERVICE_TAG, "Failed to add RX characteristic: %d", status);
}
}
void serial_svc_stop() {
tBleStatus status;
if(serial_svc) {
// Delete characteristics
status = aci_gatt_del_char(serial_svc->svc_handle, serial_svc->tx_char_handle);
if(status) {
FURI_LOG_E(SERIAL_SERVICE_TAG, "Failed to delete TX characteristic: %d", status);
}
status = aci_gatt_del_char(serial_svc->svc_handle, serial_svc->rx_char_handle);
if(status) {
FURI_LOG_E(SERIAL_SERVICE_TAG, "Failed to delete RX characteristic: %d", status);
}
// Delete service
status = aci_gatt_del_service(serial_svc->svc_handle);
if(status) {
FURI_LOG_E(SERIAL_SERVICE_TAG, "Failed to delete Serial service: %d", status);
}
free(serial_svc);
serial_svc = NULL;
}
}
bool serial_svc_update_rx(uint8_t* data, uint8_t data_len) {
furi_assert(data_len < SERIAL_SVC_DATA_LEN_MAX);
tBleStatus result = aci_gatt_update_char_value(serial_svc->svc_handle,
serial_svc->rx_char_handle,
0,
data_len,
data);
if(result) {
FURI_LOG_E(SERIAL_SERVICE_TAG, "Failed updating RX characteristic: %d", result);
}
return result != BLE_STATUS_SUCCESS;
}