void BSP_BatterCheckInit (void)
{
unsigned short cal_var;
SIM->SCGC5 |= SIM_SCGC5_PORTB_MASK;
SIM->SCGC6 |= SIM_SCGC6_ADC0_MASK;
BAT_PORT->PCR[BAT_PORT_Pin] &= ~PORT_PCR_MUX_MASK;
BAT_PORT->PCR[BAT_PORT_Pin] |= PORT_PCR_MUX(0);
BAT_ADC->CFG1 &= ~(ADC_CFG1_MODE_MASK);
BAT_ADC->CFG1 |= ADC_CFG1_MODE (3); //
BAT_ADC->CFG1 &= ~(ADC_CFG1_ADICLK_MASK);
BAT_ADC->CFG1 |= (ADC_CFG1_ADICLK (0)); //
BAT_ADC->CFG1 &= ~(ADC_CFG1_ADLSMP_MASK); //
BAT_ADC->CFG1 &= ~(ADC_CFG1_ADIV_MASK);
BAT_ADC->CFG1 |= ADC_CFG1_ADIV (3); //
BAT_ADC->CFG2 = 0; //
BAT_ADC->CFG2 |= (ADACKEN_DISABLED|ADHSC_HISPEED
|ADC_CFG2_ADLSTS(ADLSTS_20));
BAT_ADC->CV1 = 0x1234u;
BAT_ADC->CV2 = 0x5678u;
BAT_ADC->SC2 = (ACFE_DISABLED|ACFGT_GREATER
|ACREN_ENABLED|DMAEN_DISABLED
|ADC_SC2_REFSEL(REFSEL_EXT));
BAT_ADC->SC3 = (CAL_OFF|ADCO_SINGLE|AVGE_ENABLED
|ADC_SC3_AVGS(AVGS_32));
BAT_ADC->PGA = (PGAEN_DISABLED|PGACHP_NOCHOP|PGALP_NORMAL
|ADC_PGA_PGAG(PGAG_64));
BAT_ADC->SC1[0] &= ~ADC_SC1_DIFF_MASK;//
BAT_ADC->SC2 &= ~ADC_SC2_ADTRG_MASK;
BAT_ADC->SC3 &= ( ~ADC_SC3_ADCO_MASK & ~ADC_SC3_AVGS_MASK );
BAT_ADC->SC3 |= ( ADC_SC3_AVGE_MASK | ADC_SC3_AVGS(AVGS_32) );
BAT_ADC->SC3 |= ADC_SC3_CAL_MASK ;
while((BAT_ADC->SC1[0] & ADC_SC1_COCO_MASK) == 0);
if((BAT_ADC->SC3 & ADC_SC3_CALF_MASK) == CALF_FAIL){
}else{
cal_var = 0x00;
cal_var = BAT_ADC->CLP0;
cal_var += BAT_ADC->CLP1;
cal_var += BAT_ADC->CLP2;
cal_var += BAT_ADC->CLP3;
cal_var += BAT_ADC->CLP4;
cal_var += BAT_ADC->CLPS;
cal_var = cal_var/2;
cal_var |= 0x8000; // Set MSB
BAT_ADC->PG = ADC_PG_PG(cal_var);
// Calculate minus-side calibration
cal_var = 0x00;
cal_var = BAT_ADC->CLM0;
cal_var += BAT_ADC->CLM1;
cal_var += BAT_ADC->CLM2;
cal_var += BAT_ADC->CLM3;
cal_var += BAT_ADC->CLM4;
cal_var += BAT_ADC->CLMS;
cal_var = cal_var/2;
cal_var |= 0x8000; // Set MSB
BAT_ADC->MG = ADC_MG_MG(cal_var);
BAT_ADC->SC3 &= ~ADC_SC3_CAL_MASK;
}
}
uint8 ADC_Cal
(ADC_MemMapPtr adcmap)
{
/*~~~~~~~~~~~~~~~~~~~~*/
/*~~~~~~~~~~~~~~~~~~~~*/
/*~~~~~~~~~~~~~~~~~~~~*/
/*~~~~~~~~~~~~~~~~~~~~*/
/*~~~~~~~~~~~~~~~~~~~~*/
/*~~~~~~~~~~~~~~~~~~~~*/
unsigned short cal_var;
/*~~~~~~~~~~~~~~~~~~~~*/
/*~~~~~~~~~~~~~~~~~~~~*/
/*~~~~~~~~~~~~~~~~~~~~*/
/*~~~~~~~~~~~~~~~~~~~~*/
/*~~~~~~~~~~~~~~~~~~~~*/
/*~~~~~~~~~~~~~~~~~~~~*/
ADC_SC2_REG(adcmap) &= ~ADC_SC2_ADTRG_MASK; // Enable Software Conversion Trigger for Calibration Process - ADC0_SC2 = ADC0_SC2 | ADC_SC2_ADTRGW(0);
ADC_SC3_REG(adcmap) &= (~ADC_SC3_ADCO_MASK &~ADC_SC3_AVGS_MASK); // set single conversion, clear avgs bitfield for next writing
ADC_SC3_REG(adcmap) |= (ADC_SC3_AVGE_MASK | ADC_SC3_AVGS(AVGS_32)); // Turn averaging ON and set at max value ( 32 )
ADC_SC3_REG(adcmap) |= ADC_SC3_CAL_MASK; // Start CAL
while((ADC_SC1_REG(adcmap, A) & ADC_SC1_COCO_MASK) == COCO_NOT);
// Wait calibration end
if((ADC_SC3_REG(adcmap) & ADC_SC3_CALF_MASK) == CALF_FAIL)
{
return(1); // Check for Calibration fail error and return
}
// Calculate plus-side calibration
cal_var = 0x00;
cal_var = ADC_CLP0_REG(adcmap);
cal_var += ADC_CLP1_REG(adcmap);
cal_var += ADC_CLP2_REG(adcmap);
cal_var += ADC_CLP3_REG(adcmap);
cal_var += ADC_CLP4_REG(adcmap);
cal_var += ADC_CLPS_REG(adcmap);
cal_var = cal_var / 2;
cal_var |= 0x8000; // Set MSB
ADC_PG_REG(adcmap) = ADC_PG_PG(cal_var);
// Calculate minus-side calibration
cal_var = 0x00;
cal_var = ADC_CLM0_REG(adcmap);
cal_var += ADC_CLM1_REG(adcmap);
cal_var += ADC_CLM2_REG(adcmap);
cal_var += ADC_CLM3_REG(adcmap);
cal_var += ADC_CLM4_REG(adcmap);
cal_var += ADC_CLMS_REG(adcmap);
cal_var = cal_var / 2;
cal_var |= 0x8000; // Set MSB
ADC_MG_REG(adcmap) = ADC_MG_MG(cal_var);
ADC_SC3_REG(adcmap) &= ~ADC_SC3_CAL_MASK; /* Clear CAL bit */
return(0);
}
int adc_init() {
adc_pixelIndex = 0;
// disable ADC irq - not ready yet
disable_irq(ADC_IRQ_NUM);
// turn on clock to ADC0
SIM_SCGC6 |= (SIM_SCGC6_ADC0_MASK);
// to setup SW trigger on FTM2
SIM_SOPT7 = SIM_SOPT7_ADC0TRGSEL(10);
// to calibrate the ADC module
unsigned short cal_var;
cal_var = 0x0000;
// add the plus-side calibration results
cal_var += ADC_CLP0_REG(ADC0_BASE_PTR);
cal_var += ADC_CLP1_REG(ADC0_BASE_PTR);
cal_var += ADC_CLP2_REG(ADC0_BASE_PTR);
cal_var += ADC_CLP3_REG(ADC0_BASE_PTR);
cal_var += ADC_CLP4_REG(ADC0_BASE_PTR);
cal_var += ADC_CLPS_REG(ADC0_BASE_PTR);
cal_var /= 2;
cal_var |= 0x8000;
// store value in plus-side gain calibration register (PG)
ADC_PG_REG(ADC0_BASE_PTR) = ADC_PG_PG(cal_var);
cal_var = 0x0000;
// add the minus-side calibration results
cal_var += ADC_CLM0_REG(ADC0_BASE_PTR);
cal_var += ADC_CLM1_REG(ADC0_BASE_PTR);
cal_var += ADC_CLM2_REG(ADC0_BASE_PTR);
cal_var += ADC_CLM3_REG(ADC0_BASE_PTR);
cal_var += ADC_CLM4_REG(ADC0_BASE_PTR);
cal_var += ADC_CLMS_REG(ADC0_BASE_PTR);
cal_var /= 2;
cal_var |= 0x8000;
// store value in minus-side gain calibration register (MG)
ADC_MG_REG(ADC0_BASE_PTR) = ADC_MG_MG(cal_var);
ADC_SC3_REG(ADC0_BASE_PTR) &= ~ADC_SC3_CAL_MASK;
// to set the configuration register 1 (CFG1) to select the mode of
// operation, clock source, clock divide, and configuration for low
// power or long sample time
ADC_CFG1_REG(ADC0_BASE_PTR) = ADLPC_NORMAL
| ADC_CFG1_ADIV(ADIV_1)
| ADLSMP_SHORT
| ADC_CFG1_MODE(MODE_8)
| ADC_CFG1_ADICLK(ADICLK_BUS);
// to set the configuration register 2 (CFG2) to select the special
// high-speed configuration for very high speed conversions and
// select the long sample time duration during long sample mode
ADC_CFG2_REG(ADC0_BASE_PTR) = MUXSEL_ADCA
| ADACKEN_DISABLED
| ADHSC_HISPEED
| ADC_CFG2_ADLSTS(ADLSTS_2);
// to configure the status and control register 2 (SC2)
ADC_SC2_REG(ADC0_BASE_PTR) = ADTRG_SW
| ACFE_DISABLED
| ACFGT_GREATER
| ACREN_DISABLED
| DMAEN_DISABLED
| ADC_SC2_REFSEL(REFSEL_EXT);
// to configure the status and control register 3 (SC3)
// enable hw averaging, 16 samples taken
ADC_SC3_REG(ADC0_BASE_PTR) = CAL_OFF
| ADCO_SINGLE
| AVGE_ENABLED
| ADC_SC3_AVGS(AVGS_16);
// to configure the status and control register 1 (SC1)
// enable the interrupt, single-ended conversion, on AD18
ADC_SC1_REG(ADC0_BASE_PTR, A)= AIEN_ON
| DIFF_SINGLE
| ADC_SC1_ADCH(18);
// to configure the PGA register
ADC_PGA_REG(ADC0_BASE_PTR) = PGAEN_DISABLED
| PGACHP_NOCHOP
| PGALP_NORMAL
| ADC_PGA_PGAG(PGAG_64);
// enable ADC irq
enable_irq(ADC_IRQ_NUM);
return ADC_RET_SUCCESS;
}
//------------------------------------------------------------
// Calibration du convertisseur AD
// Retour: true = OK, false = KO
//------------------------------------------------------------
bool iAd_Cal(void)
{
UInt16 aCalVar=0;
bool aRet;
// Max ADC clock -> 4MHz
ADC1_CFG1&=((~ADC_CFG1_ADIV_MASK)&(~ADC_CFG1_ADICLK_MASK));
ADC1_CFG1|=(ADC_CFG1_ADIV(3)|ADC_CFG1_MODE(1)|ADC_CFG1_ADICLK(1)|ADC_CFG1_ADLSMP_MASK);
// Enable Software Conversion Trigger for Calibration Process
ADC1_SC2&=(~ADC_SC2_ADTRG_MASK);
// Set single conversion, clear avgs bitfield for next writing
ADC1_SC3&= ((~ADC_SC3_ADCO_MASK) & (~ADC_SC3_AVGS_MASK));
// Turn averaging ON and set at max value ( 32 )
ADC1_SC3|= (ADC_SC3_AVGE_MASK | ADC_SC3_AVGS(3) );
// Start CAL
ADC1_SC3 |= ADC_SC3_CAL_MASK ;
// Wait calibration end
while ( (ADC1_SC1A & ADC_SC1_COCO_MASK ) == false );
// Check for Calibration fail error and return
if ((ADC1_SC3&ADC_SC3_CALF_MASK) == ADC_SC3_CALF_MASK)
{
aRet=false;
// Clear CAL bit
ADC1_SC3&= (~ADC_SC3_CAL_MASK);
}
else
{
// Calculate plus-side calibration
aCalVar = 0x00;
aCalVar = ADC1_CLP0;
aCalVar += ADC1_CLP1;
aCalVar += ADC1_CLP2;
aCalVar += ADC1_CLP3;
aCalVar += ADC1_CLP4;
aCalVar += ADC1_CLPS;
aCalVar = aCalVar/2;
aCalVar |= 0x8000; // Set MSB
ADC1_PG= ADC_PG_PG(aCalVar);
// Calculate minus-side calibration
aCalVar = 0x00;
aCalVar = ADC1_CLM0;
aCalVar += ADC1_CLM1;
aCalVar += ADC1_CLM2;
aCalVar += ADC1_CLM3;
aCalVar += ADC1_CLM4;
aCalVar += ADC1_CLMS;
aCalVar = aCalVar/2;
aCalVar |= 0x8000; // Set MSB
ADC1_MG = ADC_MG_MG(aCalVar);
// Clear CAL bit
ADC1_SC3&= (~ADC_SC3_CAL_MASK);
// Return OK
aRet=true;
}
return aRet;
}