Микроконтроллеры

объём текста больше, не спорю, но не на много для примера : avr asm вычисление давления и температуры высотомера MS5607-02BA03 от ТЕ типы: _w - слово(16), _d - двойное(32), _q - (64). muls/mul , divs/div signed/unsigned умножение , деление имхо наглядность/читаемость вполне. на чистом асме писать - безумие, а макросы творят чудеса. ;******************************************************************** // dT = D2 - C5*2**8 ;******************************************************************** ........................................ clr_w E1 lds_w E0 , const_C5 lsl_n_d dE , 8 // R(32) <- 0 shift left, n- number shift ........................................ lds_d dF , adc_D2 sub_d dF , dE ........................................ sts_d data_dT , dF ........................................ ;******************************************************************** // TEMP = 2000 + dT * C6 / 2**23 ;******************************************************************** ........................................ clr_w G1 lds_w G0 , const_C6 muls_d // qC = dH : dG = dG * dF div2s_q qC , 23 // R(64) , n | R(64) = R(64) / 2^n signed ldi_d dE , 2000 add_d dE , dG ........................................ sts_w data_TEMP , E0 ........................................ ;******************************************************************** // OFF = C2 * 2**17 + (C4 * dT) / 2**6 ;******************************************************************** ........................................ clr_q qA lds_w C0 , const_C2 mul2_q qA , 17 // R(64) , n | R(64) = R(64) * 2^n signed/unsigned ........................................ lds_d dG , data_dT clr_w F1 lds_w F0 , const_C4 muls_d // qC = dH : dG = dG * dF div2s_q qC , 6 // R(64) , n | R(64) = R(64) / 2^n signed ........................................ add_q qA , qC ........................................ sts_q data_OFF , qA ........................................ ;******************************************************************** // SENS = C1 * 2**16 + (C3 * dT) / 2**7 ;******************************************************************** ........................................ clr_q qA lds_w C0 , const_C3 lds_d dE , data_dT sig_dq dF , dE // (R32)h , (R32)l = signed quad (R32)h : (R32)l muls_q // qC : qB = qB * qA div2s_q qB , 7 // R(64) , n | R(64) = R(64) / 2^n signed ........................................ clr_q qA lds_w C0 , const_C1 mul2_q qA , 16 // R(64) , n | R(64) = R(64) * 2^n signed/unsigned ........................................ add_q qB , qA ........................................ sts_q data_SENS , qB ........................................ ;******************************************************************** // Pmbar = (D1 * SENS / 2**21 - OFF) / 2**15 ;******************************************************************** ........................................ clr_d dD lds_D dC , adc_D1 muls_q // qC : qB = qB * qA div2s_q qB , 21 // R(64) , n | R(64) = R(64) / 2^n signed ........................................ lds_q qA , data_OFF ........................................ sub_q qB , qA ........................................ div2s_q qB , 15 // R(64) , n | R(64) = R(64) / 2^n signed ........................................ sts_d data_PRESS_mbar , dE ........................................ ;******************************************************************** // Pmmhg = (Pmbar * 7501)/100 000 ;******************************************************************** mov_d dG , dE muli_d 7501 // qC = dH : dG = dG * (K32) ........................................ divi_d 100000 // dG = dG / K(32) ........................................ sts_w data_PRESS_mmhg , G0 ;********************************************************************