Passing ADC through to NUS Service Wrong Results

RE: Passing ADC through to NUS Service Wrong Results

Edvin — Mon, 14 May 2018 08:43:05 GMT

Well,

You can change the characteristic to hold/send 16 bit values, but if you want to send 16 bits, I suggest that you split it in two 8bit values, as this is probably easier to do.

Best regards,

Edvin

RE: Passing ADC through to NUS Service Wrong Results

ewizardii — Fri, 11 May 2018 20:46:09 GMT

Thanks, I think I found a way around it - unless one can straight pass to `ble_nus_data_send` 16 bit values this is what I am doing:

    static uint16_t adc_value;
    static uint16_t adc_len;

    uint8_t i = SAADC_SAMPLES_IN_BUFFER - 1;
    adc_value = p_event->data.done.p_buffer[i];
    adc_len = sizeof(adc_value);
    err_code = ble_nus_data_send(&m_nus, (uint8_t *)&adc_value, &adc_len, m_conn_handle);

RE: Passing ADC through to NUS Service Wrong Results

Edvin — Fri, 11 May 2018 08:30:12 GMT

Hello,

I think the problem is that your saadc buffer holds uint8_t values, while they are actually uint16_t.

Try to change to:

uint16_t transfer_buffer[SAADC_SAMPLES_IN_BUFFER];

and see if it sends the correct values.

Best regards,

Edvin