c8051f850 ADC Polling Example

There are projects that need to use Silabs's c8051f850. In fact, the most important is to fancy the price, as well as its working temperature. So we need to start learning this film. The simplest ADC routines are as follows:

Initializes the system clock, initializes the IO, and so on. The P1.0 is led output and the P1.2 is the ADC input. The ADC uses VDD and GND as the reference source. and use polling in a way that is not interrupted.

void c8051f850_io_initial (void) {//disable Watchdog with key sequence WDTCN = 0xDE;        WDTCN = 0xAD; Using internal 24.5MHz RC oscillator, and no division Clksel = Clksel_clksl__hfosc |        Clksel_clkdiv__sysclk_div_1; GPIO initial P0mdout = P0mdout_b0__open_drain | P0mdout_b1__open_drain | P0mdout_b2__open_drain | P0mdout_b3__open_drain | P0mdout_b4__push_pull | P0mdout_b5__open_drain | P0mdout_b6__open_drain |        P0mdout_b7__open_drain; P1.0 LED output, P1.2 ADC input p1mdout = P1mdout_b0__push_pull | P1mdout_b1__open_drain | P1mdout_b2__open_drain | P1mdout_b3__open_drain | P1mdout_b4__open_drain | P1mdout_b5__open_drain | P1mdout_b6__open_drain |        P1mdout_b7__open_drain; P1.2 alalog ADC Input p1mdin = P1mdin_b0__digital | P1mdin_b1__digital | P1mdin_b2__analog | P1mdin_b3__digital | P1mdin_b4__digital | P1mdin_b5__digital | P1mdin_b6__digital |        P1mdin_b7__digital; P1skip = p1skip_b0__not_skipped | p1skip_b1__not_skipped | P1skip_b2__skipped | p1skip_b3__not_skipped | p1skip_b4__not_skipped | p1skip_b5__not_skipped | p1skip_b6__not_skipped |        p1skip_b7__not_skipped; CrossBar initial XBR0 = xbr0_urt0e__enabled | xbr0_spi0e__disabled | xbr0_smb0e__disabled | xbr0_cp0e__disabled | xbr0_cp0ae__disabled | xbr0_cp1e__disabled | xbr0_cp1ae__disabled |        xbr0_syscke__disabled; XBR2 = xbr2_weakpud__pull_ups_enabled |        xbr2_xbare__enabled;        ADC initial adc0mx = ADC0MX_ADC0MX__ADC0P10; ADC0CF = (1 << adc0cf_adsc__shift) | Adc0cf_ad8be__normal | adc0cf_adgn__gain_1 |        Adc0cf_adtm__track_normal;    ADC enable and start by writing adbusy Adc0cn0 &= ~adc0cn0_adcm__fmask; Adc0cn0 |= adc0cn0_aden__enabled |        Adc0cn0_adcm__adbusy; Voltage Reference Control REF0CN = Ref0cn_refsl__vdd_pin | REF0CN_IREFLVL__2P4 | Ref0cn_gndsl__gnd_pin |        ref0cn_tempe__temp_disabled; Interrupt, all Interrupt disabled EIE1 = eie1_eadc0__disabled | eie1_ecp0__disabled | Eie1_ecp1__disabled | eie1_emat__disabled | eie1_epca0__disabled | eie1_esmb0__disabled | eie1_et3__disabled | eie1_ewadc0__disabled;}

The following calls are in the main function:

void Main (void) {    c8051f850_io_initial ();        while (1)    {        unsigned long Delay = 60000;        while (delay--);                Adc0cn0_bit. Ad0busy = 1; ADC start by Soft Trigger while         (adc0cn0_bit. Ad0int = = 0); Wait for ADC complate        adc0cn0_bit. Ad0int = 0; Clear ADC Flag                adcvalue = adc0h;        Adcvalue = Adcvalue << 8;        Adcvalue = adc0l;                if (Adcvalue < +)        {            if (LED1) LED1 = 0;            else LED1 = 1;        }        else        {                    }}}    

The above code is written based on IAR for 8051.

c8051f850 ADC Polling Example