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This commit is contained in:
Edward Emelianov
2024-01-05 23:38:43 +03:00
parent 7d8cbd55cf
commit 9ecce531cb
10 changed files with 404 additions and 254 deletions
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66
F3:F303/CANbus4BTA/adc.c
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@@ -68,16 +68,15 @@ void adc_setup(){
// ADC1: channels 1-4,10,16; ADC2: channel 1
ADC1->SMPR1 = ADC_SMPR1_SMP1 | ADC_SMPR1_SMP2 | ADC_SMPR1_SMP3 | ADC_SMPR1_SMP4;
ADC1->SMPR2 = ADC_SMPR2_SMP16;
// 11 conversions in group: 1...10->16
// 5 conversions in group: 1..4,16
ADC1->SQR1 = (1<<6) | (2<<12) | (3<<18) | (4<<24) | (NUMBER_OF_ADC_CHANNELS-1);
ADC1->SQR2 = (16<<0);
ADC2->SMPR1 = ADC_SMPR1_SMP1;
ADC2->SQR1 = (1<<6) | (NUMBER_OF_ADC2_CHANNELS-1);
// configure DMA for ADC
ADC1->CFGR = ADC_CFGR_CONT | ADC_CFGR_DMAEN | ADC_CFGR_DMACFG;
DMA1_Channel1->CPAR = (uint32_t) (&(ADC1->DR));
DMA1_Channel1->CMAR = (uint32_t)(ADC_array);
DMA1_Channel1->CNDTR = NUMBER_OF_ADC1_CHANNELS * 9;
DMA1_Channel1->CNDTR = NUMBER_OF_ADC_CHANNELS * 9;
DMA1_Channel1->CCR |= DMA_CCR_MINC | DMA_CCR_MSIZE_0 | DMA_CCR_PSIZE_0 | DMA_CCR_CIRC;
DMA1_Channel1->CCR |= DMA_CCR_EN;
enADC(ADC1);
@@ -93,12 +92,8 @@ uint16_t getADCval(int nch){
#define PIX_SORT(a,b) { if ((a)>(b)) PIX_SWAP((a),(b)); }
#define PIX_SWAP(a,b) { temp=(a);(a)=(b);(b)=temp; }
uint16_t p[9];
int addr = nch, adval = NUMBER_OF_ADC1_CHANNELS;
if(nch >= NUMBER_OF_ADC1_CHANNELS){
adval = NUMBER_OF_ADC2_CHANNELS;
addr += ADC2START - NUMBER_OF_ADC1_CHANNELS;
}
for(int i = 0; i < 9; ++i, addr += adval) // first we should prepare array for optmed
int addr = nch;
for(int i = 0; i < 9; ++i, addr += NUMBER_OF_ADC_CHANNELS) // first we should prepare array for optmed
p[i] = ADC_array[addr];
PIX_SORT(p[1], p[2]) ; PIX_SORT(p[4], p[5]) ; PIX_SORT(p[7], p[8]) ;
PIX_SORT(p[0], p[1]) ; PIX_SORT(p[3], p[4]) ; PIX_SORT(p[6], p[7]) ;
@@ -120,61 +115,10 @@ float getADCvoltage(uint16_t ADCval){
// return MCU temperature (degrees of celsius)
float getMCUtemp(){
float temperature = ADCvals[ADC_TSENS] - (float) *TEMP30_CAL_ADDR;
float temperature = ADC_array[ADC_TSENS] - (float) *TEMP30_CAL_ADDR;
temperature *= (110.f - 30.f);
temperature /= (float)(*TEMP110_CAL_ADDR - *TEMP30_CAL_ADDR);
temperature += 30.f;
return(temperature);
}
// calculate R (Ohms) by given `ADCval` for main 10 ADC channels with 1k in upper arm of divider
float calcR(uint16_t ADCval){
return 1000.f/(4096.f/((float)ADCval) - 1.f);
}
/****** R(T, K):
T -= 273.15; % convert to K
_A = 3.9083e-03;
_B = -5.7750e-07;
_C = 0.;
if(T < 0.); _C = -4.1830e-12; endif
R = 1000.*(1 + _A*T + _B*T.^2 - _C.*T.^3*100. + _C.*T.^4);
=====> for T=[70:400] Kelvins
function T = pt1000Tapp(R)
k1 = 27.645;
k2 = 0.235268;
k3 = 1.0242e-05;
k4 = 0.;
if(R < 1000)
k1 = 31.067;
k2 = 2.2272e-01;
k3 = 2.5251e-05;
k4 = -5.9001e-09;
endif
T = k1 + k2*R + k3*R.^2 + k4*R.^3;
endfunction
mean(T-Tapp)= -3.3824e-04
std(T-Tapp')= 3.2089e-03
max(abs(T-Tapp'))= 0.011899
********/
// approximate calculation of T (K) for platinum 1k PTC
float calcT(uint16_t ADCval){
float R = calcR(ADCval);
if(R < 1000.){
return (31.067 + R * (2.2272e-01 + R * (2.5251e-05 - R * 5.9001e-09)));
}
return (27.645 + R * (0.235268 + R * 1.0242e-05));
}
// MPX5050: V=VS(P x 0.018 + 0.04); for 3v3 ADU=4096(P*0.018+0.04) ====>
// 0.018P=ADU/4096-0.04,
// P(kPa) = 55.556*(ADU/4096-0.04)
float calcPres5050(){
float adu = (float)ADCvals[ADC_EXT]/4096. - 0.04;
return 55.556*adu;
}