Songhan SN8P2711 2722 ADC initialization program and application-assembly source code

Source: Internet
Author: User

/* Songhan SN8P2711 2722 ADC initialization program and application instance */INIT_ADC: MOVA, #0XB2 // start the ADC circuit to enable AIN channel B0MOVADM, AMOVA, # 0XF0B0MOVADR,; fad = 1/2 Fcpu sets the ADC conversion rate; MOVA, # 0X1C for a pure analog input port; P4.2 3 4 for a simulated AD port B0MOVP4CON, a ret // --- application instance -----//****************************** * ******** // Function Name: READAD1 // function: Read AD value // entry parameter: NONE // exit parameter: none //************************************* ** READAD1: MOVA, #0XF3; select 3 channels to convert B0MOVADM, AMOVA, # 0X00B0MOVADR, ACALLDLY100U; latency; Start ad A_AD1: latency; wait until the conversion ends B0MOVA, ADBMOVT_NTCM,; the conversion value to the adserver is 8 bits in height.


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