ADC does not work when I disable UART

[copperface]

Here is my question.

I always disable uart after I send data.

NRF_UART0->TASKS_STOPTX = 1;
NRF_UART0->ENABLE = UART_ENABLE_ENABLE_Disabled;

this was write in the function of:

uart_event_handler

and in the case of APP_UART_TX_EMPTY evt->type.

Before I send data, I always run:

    NRF_UART0->ENABLE =  UART_ENABLE_ENABLE_Enabled;\
    NRF_UART0->TASKS_STARTTX = 1;           \

However, when I do this, my ADC module just does not work. I have to stop disable and enable uart. Then the ADC works fine.

What is the problem?

[copperface]

I have solve this problem by add nrf_delay_ms(1) after I start ADC

uint32_t temp = 0;
ovc_adc_on();

NRF_ADC->TASKS_START = 1;
nrf_delay_ms(1);// need time to initial ADC
while( (NRF_ADC->BUSY) ) {
}

temp = NRF_ADC->RESULT;
NRF_ADC->TASKS_STOP = 1;
ovc_adc_off();f();