How can I change the TX_BUFFERS on both nrf51 and nrf52?

[bluetoothbiao]

HI, I get the information frome the sd_ble_tx_buffer_count_get that ,the nrf51 with S110 SD8.0 has 7 count(7*32BYTES) of TX_buffers (I can use 6cnt one time) . The nrf52 with SDK 0.9.2 SDs132_nrf52_2.0.0-4.alpha_softdevice has 3 TX_buffers(2 count can i used).

I want to know that

1. How can I change the tx_buffers size ,or how can I keep the txbuffers always have some data in there?    I have tested the BLE_EVT_TX_COMPLETE event to send data as fast as I can ,that is not fast enough.

[bluetoothbiao]

I see that, every interval i can put no more than 2 count of packs into txbuffers the message sequence below is in one interval that shows what's I test the nrf52 works

|--------master--------------------------------------slave-NRF52----------|

|#1LL_DATA_PUD------------------->>>>>>>>>>>>>>>>SD------------|

|------------------------150us-------------------------------------------------|

|#2 <<<<<<------------------------------------LL_DATA PDU (pack 1)| (1 packs keep)

|------------------------150us-------------------------------------------------|

|#3LL_DATA_PUD------------------->>>>>>>>>>>>>>>>SD------------|

|------------------------150us-------------------------------------------------|

|#4 <<<<<<-------------------- LL_DATA PDU (pack 2) (no packs keep)

|#5 no more data so no more LL_data_pud(empty or not) frome the master end this interval.

I think the BLE_EVT_TX_COMPLETE is become frome #2 and #4

what's I want is that I want to put one pack between #2 to #4 then I can keep the txbuffer always has packs. and then the #5 will not stop to send LL_data_pud.(the stack of the master is all under my control no matter the LL or BB)

or if the rf txbuffer is more than 10*32BYTES it will works too .