LOG_INF doesn't print float numbers on RTT logs

Hello Bhumika,

I am getting just 0.00 for floating numbers.

I’m not sure if I can reproduce this.

Could you provide me with a small sample code and RTT log?

Thanks & regards,

Markus

hi,

Below is the code snippet:

 #define float_num 10.234
 
 /* Print the AIN0 values */
    int ret;
    float adc_voltage = 0;
    ret = adc_read(adc_battery_voltage, &sequence);
    LOG_INF("ADC read err: %d\n", ret);
    adc_voltage = (float)(((float)m_sample_buffer[i] / 1023.0f) * 3600.0f);
    LOG_INF("ADC raw value: %d\n", m_sample_buffer[i]);
    LOG_INF("Measured voltage: %d mV\n", (int)adc_voltage);
    LOG_INF("Float Num: %0.3f \n", float_num);
    LOG_INF("Measured voltage: %0.2f mV\n", adc_voltage);

and here is RTT log:

So as you can see, when I print the value in integer format, it shows in log, else it displays 0.00 on RTT logs.

bhumika said:

So as you can see, when I print the value in integer format, it shows in log, else it displays 0.00 on RTT logs.

Thanks for the feedback, Bhumika!

Have you enabled the following configuration parameters in your prj.conf?

CONFIG_LOG=y
CONFIG_LOG2_MODE_IMMEDIATE=y

CONFIG_FPU=y

Regards,

Markus

Hi,

I have enabled the following, 

CONFIG_LOG=y

CONFIG_FPU=y

but not 

CONFIG_LOG2_MODE_IMMEDIATE=y 

in prj.conf.

I will enable this as well, but can you explain to me the role of the "CONFIG_LOG2_MODE_IMMEDIATE" conf also?

bhumika said:

I will enable this as well, but can you explain to me the role of the "CONFIG_LOG2_MODE_IMMEDIATE" conf also?

CONFIG_LOG2_MODE_IMMEDIATE (or CONFIG_LOG2_MODE_DEFERRED alternatively) enable LOG2, which supports floating point operations.

Regards,

Markus