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]

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

[MartinBL]

How long is MAX_RX_LEN? If 'length' is longer than MAX_RX_LEN you will modify bytes that is outside of tx_buff when you use memcpy() like that. When I tested your code this resulted hard faults.

I suggest that you try something like this instead:

void bsp_uart_send_data(uint8_t * p_data, uint16_t length)
{
    for (uint32_t i = 0; i < length; i++)
    {
        while(app_uart_put(*p_data) != NRF_SUCCESS);
        p_data++;
    }
}

This also seems to work:

void bsp_uart_send_data(uint8_t * p_data, uint16_t length)
{
    for (uint32_t i = 0; i < length; i++)
    {
        while(app_uart_put(p_data[i]) != NRF_SUCCESS);
    }
}

but I'm no C expert so I don't know what is most optimal.