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19 August 2018 08:30 AM

Total Posts: 4

Joined 2018-08-07

Hi,

I am developing on nRF52832 using Nordic SDK v14.2.0 and softdevice S212. I started from the continuous scanning controller example found in Nordic's SDK, and now I would like to use ANT channels 1 to 15 as response channels. When I call sd_ant_channel_assign with ucChannel greater than 1, the call fails with error code 0x4033 (INVALID_PARAMETER_PROVIDED). I have set ANT_CONFIG_TOTAL_CHANNELS_ALLOCATED to 15 in sdk_config.h.

Below is a minimal working example:

// initialize logging
    ret_code_t err_code = NRF_LOG_INIT(NULL);
    APP_ERROR_CHECK(err_code);

    NRF_LOG_DEFAULT_BACKENDS_INIT();
    NRF_LOG_INFO("Hello world")

 // sanity check, this prints 15
    NRF_LOG_INFO("ANT_CONFIG_TOTAL_CHANNELS_ALLOCATED = %d",
                 ANT_CONFIG_TOTAL_CHANNELS_ALLOCATED);

    // initialize app timer
    err_code = app_timer_init();
    APP_ERROR_CHECK(err_code);

    // enable ANT softdevice
    err_code = nrf_sdh_enable_request();
    APP_ERROR_CHECK(err_code);

    ASSERT(nrf_sdh_is_enabled());

    err_code = nrf_sdh_ant_enable();
    APP_ERROR_CHECK(err_code);

    // configure ANT to report device ID and RSSI
    err_code = sd_ant_lib_config_set(
        ANT_LIB_CONFIG_MESG_OUT_INC_DEVICE_ID |
        ANT_LIB_CONFIG_MESG_OUT_INC_RSSI);
    APP_ERROR_CHECK(err_code);

    // channel config for continuous scanning slave
    ant_channel_config_t channel_config = {
        .channel_number    = ANT_SCAN_CHANNEL_NUMBER, // = 0
        .channel_type      = CHANNEL_TYPE_SLAVE,
        .ext_assign        = 0x00,
        .rf_freq           = RF_FREQ,
        .transmission_type = CHAN_ID_SLAVE_TRANS_TYPE, // = 0
        .device_type       = CHAN_ID_SLAVE_DEV_TYPE, // = 0
        .device_number     = 0x00,
        .channel_period    = 0x00,
        .network_number    = ANT_NETWORK_NUM, // = 0
    };

    err_code = ant_channel_init(&channel;_config);
    APP_ERROR_CHECK(err_code);

    // assign response channel 1
    err_code = sd_ant_channel_assign(1,
                                     CHANNEL_TYPE_SLAVE,
                                     ANT_NETWORK_NUM,
                                     0x00);
    APP_ERROR_CHECK(err_code); // <--- success

    // assign response channel 2
    err_code = sd_ant_channel_assign(2,
                                     CHANNEL_TYPE_SLAVE,
                                     ANT_NETWORK_NUM,
                                     0x00);
    APP_ERROR_CHECK(err_code); // <--- returns with 0x4033 

Any help is greatly appreciated.

Best,
Fredrik

30 August 2018 03:22 PM #1

Harrison Administrator

Total Posts: 745

Joined 2012-09-14

PM

Hi Fredrik,

I am just re-posting this here for visibility but it looks like you still only have 2 channels allocated. This is the field which should be changed in sdk_config.h. The existing continuous scan example in the SDK allocates only 2 channels.

//  ANT Channels
 
//==========================================================
//  NRF_SDH_ANT_TOTAL_CHANNELS_ALLOCATED - Allocated ANT channels.
#ifndef NRF_SDH_ANT_TOTAL_CHANNELS_ALLOCATED
#define NRF_SDH_ANT_TOTAL_CHANNELS_ALLOCATED 2
#endif 

Best regards,
Harrison

31 August 2018 06:12 AM #2

fredrik_ellertsen Newbie

Total Posts: 4

Joined 2018-08-07

PM

Hi Harrison, thanks for your reply.

It seems ANT_CONFIG_TOTAL_CHANNELS_ALLOCATED was renamed at some point in the SDK to NRF_SDH_ANT_TOTAL_CHANNELS_ALLOCATED, which is why my define had no effect. Thanks for clarifying, everything works fine now.

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sd_ant_channel_assign fails when ucChannel is > 1