how to change new device_number when ANT device is working

[chao]

Hello,

I use nrf51422 to connect the ANT device(Heart rate monitor) and it can work .

My question is , I want to assign a new device_number to 51422 and use this new device_number to search second ANT+ device ,but I found the 51422 will be reset.

I don't want 51422 to reset ,how could I do?

I use below function to assign a new device_number

void change_device_number(uint16_t device_number) {

uint32_t err_code;

err_code = sd_ant_channel_close(ANT_HRMRX_ANT_CHANNEL);
APP_ERROR_CHECK(err_code);

err_code = sd_ant_network_address_set(ANTPLUS_NETWORK_NUMBER, m_ant_network_key);
APP_ERROR_CHECK(err_code);

err_code = sd_ant_channel_assign(ANT_HRMRX_ANT_CHANNEL,
                                 ANT_HRMRX_CHANNEL_TYPE,
                                 ANTPLUS_NETWORK_NUMBER,
                                 ANT_HRMRX_EXT_ASSIGN);

APP_ERROR_CHECK(err_code);

err_code = sd_ant_channel_id_set(ANT_HRMRX_ANT_CHANNEL,
                                 device_number,
                                 ANT_HRMRX_DEVICE_TYPE,
                                 ANT_HRMRX_TRANS_TYPE);


APP_ERROR_CHECK(err_code);

err_code = sd_ant_channel_radio_freq_set(ANT_HRMRX_ANT_CHANNEL, ANTPLUS_RF_FREQ);


APP_ERROR_CHECK(err_code);

err_code = sd_ant_channel_period_set(ANT_HRMRX_ANT_CHANNEL, ANT_HRMRX_MSG_PERIOD);


APP_ERROR_CHECK(err_code);

err_code = sd_ant_channel_open(ANT_HRMRX_ANT_CHANNEL);
APP_ERROR_CHECK(err_code);


}

[Asbjørn]

What error code do you get? In main there are assert callbacks and app_error_handler that will display the error code and on which line it went wrong. Would also encourage you to try and step through the code with the debugger to see on which line it goes wrong.

[chao]

thanks your suggestion.

[chao]

I get some date from app_error_handler() .

error code: 0x4015

and error line is at:

err_code = sd_ant_channel_assign(ANT_HRMRX_ANT_CHANNEL, ANT_HRMRX_CHANNEL_TYPE, ANTPLUS_NETWORK_NUMBER, ANT_HRMRX_EXT_ASSIGN);

APP_ERROR_CHECK(err_code); // <------ error is at this line

[Asbjørn]

#define NRF_ANT_ERROR_CHANNEL_IN_WRONG_STATE          NRF_ANT_ERROR_OFFSET + CHANNEL_IN_WRONG_STATE  ///< Response on attempt to perform an action from the wrong channel state.

It seems like you haven't closed the channel you are trying to re-configure. Make sure that the channel is closed before you modify the parameters.

edit: You have do add a delay to ensure that the channel is closed before you change any parameters on it. I tested the routine you sent me here and it works, but it needs a delay. I did a nasty little for-loop to add a delay quickly, I would recommend you to wait for the callback and make sure that the channel is closed correctly before you change the device number and you should be fine.

[chao]

how to know channel is closed or not? I get error code from "sd_ant_channel_close" is 0x00.