Hi, I got a problem.
I created a timer, interval is 30ms.
#define MIN_CONN_INTERVAL MSEC_TO_UNITS(150, UNIT_10_MS) /**< Minimum acceptable connection interval (0.02 seconds). */
#define MAX_CONN_INTERVAL MSEC_TO_UNITS(400, UNIT_10_MS) /**< Maximum acceptable connection interval (0.20 second). */
static void notify_timeout_handler(void * p_context){
uint32_t err_code;
uint8_t fifo_number;
int fifo_get_data;
flag_30ms_interrupt = true;
fifo_number = fifo_status(&m_FIFO);
if(ble_connect_status && fifo_number != 0 && m_nus.is_notification_enabled == true){
if(can_get_new_fifo_array){
fifo_get_data = fifo_get(&m_FIFO);
for(int i=0;i<20;i++)
nus_data_array[i] = ecg_fifo[m_FIFO.buf[fifo_get_data]]->data_array[i];
nus_data_array_index = ecg_fifo[m_FIFO.buf[fifo_get_data]]->data_length;
can_get_new_fifo_array = false;
}
err_code = ble_nus_string_send(&m_nus, nus_data_array, nus_data_array_index);
if (err_code == NRF_SUCCESS)
{
nus_data_array_index = 0; //Data has been buffered in softdevice for transmission so we can write data_array with new data.
can_get_new_fifo_array = true;
LEDS_INVERT(BSP_LED_0_MASK);
}
else if (err_code == NRF_ERROR_INVALID_STATE ||
err_code == BLE_ERROR_NO_TX_PACKETS ||
err_code == NRF_ERROR_BUSY)
{
//Do nothing. data_array still contains data for subsequent transmission.
//data_array content will be transmitted on another UART RX interrupt, TX_COMPLETE event or BLE services enabled event.
}
else
{
APP_ERROR_CHECK(err_code);
}
}
}
Using SDK11, 51822, S130V2.
But when I using Lightblue app on iPhone6, sometimes the packet interval only 2~15ms.
13:06:32.053 notified:XXXXXXXXXXX
13:06:32.113 notified:XXXXXXXXXXX
13:06:32.114 notified:XXXXXXXXXXX
13:06:32.143 notified:XXXXXXXXXXX
My android engineers also got the same result on android phone. And they said it's too fast.
Is there any way I can do to avoid it? make it more stable?
