nrf52832 uart buffer size

[yy]

hi, i have set the uart buffer size as 64. but when i am transmitting data,i found that the size might not enough(eg. there are 100 Bytes to send).how could i do except for expanding the size? i have try to use twice to send the data by for(;;), but it isn't successful.

[MartinBL]

What SDK are you using and how does your application behave when you transmit too much data? In other words, what makes you believe 100 bytes might not be enough?

[yy]

hi Martin, i am using other's project, ths sdk might be 11 or 12 ,i'm not sure. the init code of uart:

APP_UART_FIFO_INIT( 
		&comm_params, 
		UART_RX_BUF_SIZE,
		UART_TX_BUF_SIZE,
		uart_rx_handle,
		APP_IRQ_PRIORITY_LOW,
		err_code);  

//and the send data code is 
for (uint32_t i = 0; i < idx; i++) 
{
    while(app_uart_put(tx_buff[i]) != NRF_SUCCESS);
}

i have made some experiments. i found that data couldn't be sent out 100 Bytes once when i set UART_TX_BUF_SIZE to 64(i think it doesn't send out by jlink RTT log)

[MartinBL]

I have tried to reproduce your problem with SDK 12.3, but it seems to work fine. How big is your tx_buff and idx?

[yy]

the UART_TX_BUF_SIZE is 64,when i send 30 Bytes once(the size of tx_buff is 100 and idx = 30),it is ok. but when i send 100 Bytes once(the size of tx_buff is 100 and idx = 100), my program couldn't go on

[MartinBL]

Can you edit your original question and attach your entire code?