/** adc_init
* \brief initialize and calibrate ADC0 module
* \brief 48MHz IPBus clock; ADC clock = 48M/2/8 = 3MHz
* \brief Total conversion time: 56N+4ADCK
* \brief given sampling rate Fs = 6.4K, 156us/sample, 156*3= 468 ADCK
* \author FSL
* \param none
* \return none
* \warning assumes 48MHz IPBus clock
*/
void adc_init(void)
{
uint8_t cal_ok;
SIM_SCGC6 |= SIM_SCGC6_ADC0_MASK;
#ifdef CMSIS
NVIC_EnableIRQ(ADC0_IRQn);
#else
enable_irq(INT_ADC0 - 16);
#endif
/* 48MHz IPBus clock
* ADC clock = 48M/2/8 = 3MHz
* Total conversion time: 56N+4ADCK
* Given sampling rate Fs = 6.4K, 156us/sample, 156*3= 468 ADCK
* the maximum h/w average number = 8
* use h/w average number = 4
* Total conversion time: 56*4+4 = 228 ADC clocks,76us
* There are 468-228 = 240 ADC clocks (ie. 80us) free for post processing
*/
// Initialize ADC0
// Do calibration first with 32 h/w averages
Master_Adc_Config.CONFIG1 = ADLPC_NORMAL | ADC_CFG1_ADIV(ADIV_8) | ADLSMP_LONG | ADC_CFG1_MODE(MODE_16)
| ADC_CFG1_ADICLK(ADICLK_BUS_2);
Master_Adc_Config.CONFIG2 = MUXSEL_ADCA | ADACKEN_ENABLED | ADHSC_HISPEED | ADC_CFG2_ADLSTS(ADLSTS_20) ;
Master_Adc_Config.COMPARE1 = 0x1234u ;
Master_Adc_Config.COMPARE2 = 0x5678u ;
Master_Adc_Config.STATUS2 = ADTRG_SW | ACFE_DISABLED | ACFGT_GREATER | ACREN_ENABLED | DMAEN_DISABLED | ADC_SC2_REFSEL(REFSEL_EXT);
Master_Adc_Config.STATUS3 = CAL_OFF | ADCO_SINGLE | AVGE_ENABLED | ADC_SC3_AVGS(AVGS_32);
// Master_Adc_Config.PGA = PGAEN_DISABLED | PGACHP_NOCHOP | PGALP_NORMAL | ADC_PGA_PGAG(PGAG_64);
Master_Adc_Config.STATUS1A = AIEN_OFF | DIFF_SINGLE | ADC_SC1_ADCH(31);
Master_Adc_Config.STATUS1B = AIEN_OFF | DIFF_SINGLE | ADC_SC1_ADCH(31);
ADC_Config_Alt(ADC0_BASE_PTR, &Master_Adc_Config); // config ADC
cal_ok = ADC_Cal(ADC0_BASE_PTR); // do the calibration
if (cal_ok != 0) printf("ADC calibration error");
ADC_Read_Cal(ADC0_BASE_PTR,&CalibrationStore[1]); // store the cal
// Now do normal ADC configuration with 4 h/w averages and h/w trigger from PDB
Master_Adc_Config.CONFIG1 = ADLPC_NORMAL | ADC_CFG1_ADIV(ADIV_8) | ADLSMP_LONG | ADC_CFG1_MODE(MODE_12)
| ADC_CFG1_ADICLK(ADICLK_BUS_2);
Master_Adc_Config.CONFIG2 = MUXSEL_ADCB | ADACKEN_ENABLED | ADHSC_HISPEED | ADC_CFG2_ADLSTS(ADLSTS_20) ;
Master_Adc_Config.COMPARE1 = 0x1234u ;
Master_Adc_Config.COMPARE2 = 0x5678u ;
Master_Adc_Config.STATUS2 = !ADTRG_HW | ACFE_DISABLED | ACFGT_GREATER | ACREN_DISABLED | DMAEN_DISABLED | ADC_SC2_REFSEL(REFSEL_EXT);
Master_Adc_Config.STATUS3 = CAL_OFF | ADCO_SINGLE | AVGE_ENABLED | ADC_SC3_AVGS(AVGS_4);
// Master_Adc_Config.PGA = PGAEN_DISABLED | PGACHP_NOCHOP | PGALP_NORMAL | ADC_PGA_PGAG(PGAG_64);
Master_Adc_Config.STATUS1A = !AIEN_ON | DIFF_SINGLE | ADC_SC1_ADCH(31);
Master_Adc_Config.STATUS1B = !AIEN_ON | DIFF_SINGLE | ADC_SC1_ADCH(31);
ADC_Config_Alt(ADC0_BASE_PTR, &Master_Adc_Config); // config the ADC again to default conditions
}
/*
** ===================================================================
** Method : ADC0_Init (component Init_ADC)
** Description :
** This method initializes registers of the ADC module
** according to the Peripheral Initialization settings.
** Call this method in user code to initialize the module. By
** default, the method is called by PE automatically; see "Call
** Init method" property of the component for more details.
** Parameters : None
** Returns : Nothing
** ===================================================================
*/
void ADC0_Init(void)
{
/* SIM_SCGC6: ADC0=1 */
SIM_SCGC6 |= SIM_SCGC6_ADC0_MASK;
/* ADC0_CFG1: ??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,ADLPC=0,ADIV=0,ADLSMP=0,MODE=0,ADICLK=0 */
ADC0_CFG1 = ADC_CFG1_ADIV(0x00) |
ADC_CFG1_MODE(0x00) |
ADC_CFG1_ADICLK(0x00);
/* ADC0_CFG2: ??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,ADACKEN=0,ADHSC=0,ADLSTS=0 */
ADC0_CFG2 &= (uint32_t)~(uint32_t)(
ADC_CFG2_ADACKEN_MASK |
ADC_CFG2_ADHSC_MASK |
ADC_CFG2_ADLSTS(0x03) |
0xFFFFFFE0U
);
/* ADC0_CV1: ??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,CV=0 */
ADC0_CV1 = ADC_CV1_CV(0x00);
/* ADC0_CV2: ??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,CV=0 */
ADC0_CV2 = ADC_CV2_CV(0x00);
/* ADC0_OFS: ??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,OFS=4 */
ADC0_OFS = ADC_OFS_OFS(0x04);
/* ADC0_SC2: ??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,ADACT=0,ADTRG=0,ACFE=0,ACFGT=0,ACREN=0,DMAEN=0,REFSEL=0 */
ADC0_SC2 = ADC_SC2_REFSEL(0x00);
/* ADC0_SC3: ??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,CAL=0,CALF=0,??=0,??=0,ADCO=0,AVGE=0,AVGS=0 */
ADC0_SC3 = ADC_SC3_AVGS(0x00);
/* ADC0_SC1A: ??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,COCO=0,AIEN=0,DIFF=0,ADCH=0x1F */
ADC0_SC1A = ADC_SC1_ADCH(0x1F);
/* ADC0_SC1B: ??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,COCO=0,AIEN=0,DIFF=0,ADCH=0x1F */
ADC0_SC1B = ADC_SC1_ADCH(0x1F);
}
void analog_init(void)
{
VREF_TRM = 0x60;
VREF_SC = 0xE1; // enable 1.2 volt ref
// SIM_SCGC6 |= SIM_SCGC6_ADC0;
#if F_BUS == 48000000
ADC0_CFG1 = ADC_CFG1_ADIV(3) + ADC_CFG1_ADLSMP + ADC_CFG1_MODE(3) + ADC_CFG1_ADICLK(1);
#elif F_BUS == 24000000
ADC0_CFG1 = ADC_CFG1_ADIV(3) + ADC_CFG1_ADLSMP + ADC_CFG1_MODE(3) + ADC_CFG1_ADICLK(0);
#else
#error
#endif
//return;
ADC0_CFG2 = ADC_CFG2_MUXSEL + ADC_CFG2_ADLSTS(1);
ADC0_SC2 = ADC_SC2_REFSEL(0); // vcc/ext ref
//ADC0_SC2 = ADC_SC2_REFSEL(1); // 1.2V ref
ADC0_SC3 = ADC_SC3_AVGE + ADC_SC3_AVGS(3); // avg 32 samples
ADC0_SC3 = ADC_SC3_AVGE + ADC_SC3_AVGS(0); // avg 4 samples
ADC0_SC3 = 0; // no averaging
//calibrating = 0;
//return;
ADC0_SC3 = ADC_SC3_CAL + ADC_SC3_AVGE + ADC_SC3_AVGS(3); // begin cal
calibrating = 1;
}
void adc_init (void) {
/*
* this initializes the ADC to record from PTE20, the
* MKL25Z only has one ADC peripheral
*/
/* SIM_SCGC6: ADC0=1 */
SIM_SCGC6 |= SIM_SCGC6_ADC0_MASK;
SIM_SCGC5 |= SIM_SCGC5_PORTE_MASK;
/* PORTE_PCR20: ISF=0,MUX=0 */
PORTE_PCR20 &= (uint32_t)~(uint32_t)((PORT_PCR_ISF_MASK | PORT_PCR_MUX(0x07)));
/* ADC0_CFG1: ??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,ADLPC=0,ADIV=1,ADLSMP=0,MODE=3,ADICLK=3 */
ADC0_CFG1 = ADC_CFG1_ADIV(0x01) |
ADC_CFG1_MODE(0x03) |
ADC_CFG1_ADICLK(0x03);
/* ADC0_CFG2: ADACKEN=0,ADHSC=0,ADLSTS=0 */
ADC0_CFG2 &= (uint32_t)~(uint32_t)(
ADC_CFG2_ADACKEN_MASK |
ADC_CFG2_ADHSC_MASK |
ADC_CFG2_ADLSTS(0x03)
);
//
// Need to drive Vrefh and Vrefh, already done on FRDM board
//
/* ADC0_SC2: ??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,ADACT=0,ADTRG=0,ACFE=0,ACFGT=0,ACREN=0,DMAEN=0,REFSEL=0 */
ADC0_SC2 = 0x00U;
/* ADC0_SC3: ??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,??=0,CAL=0,CALF=1,??=0,??=0,ADCO=0,AVGE=0,AVGS=0 */
ADC0_SC3 = ADC_SC3_CALF_MASK;
}
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;
}
}
/* Change the resolution of the measurement
* For single-ended measurements: 8, 10, 12 or 16 bits.
* For differential measurements: 9, 11, 13 or 16 bits.
* If you want something in between (11 bits single-ended for example) select the inmediate higher
* and shift the result one to the right.
*/
void ADC::setResolution(uint8_t bits)
{
uint8_t config;
if (bits <8) {
config = 8;
} else if (bits > 16) {
config = 16;
} else {
config = bits;
}
// if the new res is the "same" as the old, update analog_config_bits, but do nothing else
if( (config==8 && analog_config_bits==9) || (config==9 && analog_config_bits==8)
|| (config==10 && analog_config_bits==11) || (config==11 && analog_config_bits==10)
|| (config==12 && analog_config_bits==13) || (config==13 && analog_config_bits==12) ) {
analog_config_bits = config;
} else if (config != analog_config_bits) { // change res
analog_config_bits = config;
// conversion resolution and frequency
if ( (analog_config_bits == 8) || (analog_config_bits == 9) ) {
ADC0_CFG1 = ADC0_CFG1_24MHZ + ADC_CFG1_MODE(0); // 0 clock divide + Input clock: 24 MHz (run at 24 MHz) + Conversion mode: 8 bit + Sample time: Short
ADC0_CFG2 = ADC_CFG2_MUXSEL + ADC_CFG2_ADLSTS(3); // b channels + Sample time 2 cycles (I think that if ADC_CFG1_ADLSMP isn't set, then ADC_CFG2_ADLSTS doesn't matter)
analog_max_val = 256; // diff mode 9 bits has 1 bit for sign, so max value is the same as single 8 bits
} else if ( (analog_config_bits == 10 )|| (analog_config_bits == 11) ) { // total clock cycles to complete conversion: 3 ADCK + 5 BUS + 4 averages*( 20 + 2 ADCK ) = 7.8 us
ADC0_CFG1 = ADC0_CFG1_12MHZ + ADC_CFG1_MODE(2) + ADC_CFG1_ADLSMP; // Clock divide: 1/2 + Input clock: 24 MHz (run at 12 MHz) + Conversion mode: 10 bit + Sample time: Long
ADC0_CFG2 = ADC_CFG2_MUXSEL + ADC_CFG2_ADLSTS(3); // b channels + Sample time 2 extra clock cycles
analog_max_val = 1024;
} else if ( (analog_config_bits == 12 )|| (analog_config_bits == 13) ) {
ADC0_CFG1 = ADC0_CFG1_12MHZ + ADC_CFG1_MODE(1) + ADC_CFG1_ADLSMP; // Clock divide: 1/2 + Input clock: 24 MHz (run at 12 MHz) + Conversion mode: 12 bit + Sample time: Long
ADC0_CFG2 = ADC_CFG2_MUXSEL + ADC_CFG2_ADLSTS(2); // b channels + Sample time: 6 extra clock cycles
analog_max_val = 4096;
} else {
ADC0_CFG1 = ADC0_CFG1_12MHZ + ADC_CFG1_MODE(3) + ADC_CFG1_ADLSMP; //Clock divide: 1/2 + Input clock: 24 MHz (run at 12 MHz) + Conversion mode: 16 bit + Sample time: Long
ADC0_CFG2 = ADC_CFG2_MUXSEL + ADC_CFG2_ADLSTS(2); // b channels + Sample time: 6 extra clock cycles
analog_max_val = 65536;
}
// no recalibration is needed when changing the resolution, p. 619
// but it's needed if we change the frequency...
if (calibrating) ADC0_SC3 = 0; // cancel cal
calibrate(); // re-cal
} // end if change res
}
int adc_init(adc_t line)
{
/* make sure the given line is valid */
if (line >= ADC_NUMOF) {
return -1;
}
/* prepare the device: lock and power on */
prep(line);
/* configure the connected pin mux */
if (adc_config[line].pin != GPIO_UNDEF) {
gpio_init_port(adc_config[line].pin, GPIO_AF_ANALOG);
}
/* The ADC requires at least 2 MHz module clock for full accuracy, and less
* than 12 MHz */
/* For the calibration it is important that the ADC clock is <= 4 MHz */
uint32_t adiv;
if (CLOCK_BUSCLOCK > (ADC_MAX_CLK << 3)) {
#if KINETIS_HAVE_ADICLK_BUS_DIV_2
/* Some CPUs, e.g. MK60D10, MKW22D5, provide an additional divide by two
* divider for the bus clock as CFG1[ADICLK] = 0b01
*/
adiv = ADC_CFG1_ADIV(3) | ADC_CFG1_ADICLK(1);
#else
/* Newer CPUs seem to have replaced this with various alternate clock
* sources instead */
adiv = ADC_CFG1_ADIV(3);
#endif
}
else {
unsigned int i = 0;
while ((i < 3) && (CLOCK_BUSCLOCK > (ADC_MAX_CLK << i))) {
++i;
}
adiv = ADC_CFG1_ADIV(i);
}
/* set configuration register 1: clocking and precision */
/* Set long sample time */
dev(line)->CFG1 = ADC_CFG1_ADLSMP_MASK | adiv;
/* select ADxxb channels, longest sample time (20 extra ADC cycles) */
dev(line)->CFG2 = ADC_CFG2_MUXSEL_MASK | ADC_CFG2_ADLSTS(0);
/* select software trigger, external ref pins */
dev(line)->SC2 = ADC_SC2_REFSEL(0);
/* select hardware average over 32 samples */
dev(line)->SC3 = ADC_SC3_AVGE_MASK | ADC_SC3_AVGS(3);
/* set an (arbitrary) input channel, single-ended mode */
dev(line)->SC1[0] = ADC_SC1_ADCH(0);
/* perform calibration routine */
int res = kinetis_adc_calibrate(dev(line));
done(line);
return res;
}
void analog_init(void)
{
uint32_t num;
VREF_TRM = 0x60;
VREF_SC = 0xE1; // enable 1.2 volt ref
if (analog_config_bits == 8) {
ADC0_CFG1 = ADC0_CFG1_24MHZ + ADC_CFG1_MODE(0);
ADC0_CFG2 = ADC_CFG2_MUXSEL + ADC_CFG2_ADLSTS(3);
} else if (analog_config_bits == 10) {
ADC0_CFG1 = ADC0_CFG1_12MHZ + ADC_CFG1_MODE(2) + ADC_CFG1_ADLSMP;
ADC0_CFG2 = ADC_CFG2_MUXSEL + ADC_CFG2_ADLSTS(3);
} else if (analog_config_bits == 12) {
ADC0_CFG1 = ADC0_CFG1_12MHZ + ADC_CFG1_MODE(1) + ADC_CFG1_ADLSMP;
ADC0_CFG2 = ADC_CFG2_MUXSEL + ADC_CFG2_ADLSTS(2);
} else {
ADC0_CFG1 = ADC0_CFG1_12MHZ + ADC_CFG1_MODE(3) + ADC_CFG1_ADLSMP;
ADC0_CFG2 = ADC_CFG2_MUXSEL + ADC_CFG2_ADLSTS(2);
}
if (analog_reference_internal) {
ADC0_SC2 = ADC_SC2_REFSEL(1); // 1.2V ref
} else {
ADC0_SC2 = ADC_SC2_REFSEL(0); // vcc/ext ref
}
num = analog_num_average;
if (num <= 1) {
ADC0_SC3 = ADC_SC3_CAL; // begin cal
} else if (num <= 4) {
ADC0_SC3 = ADC_SC3_CAL + ADC_SC3_AVGE + ADC_SC3_AVGS(0);
} else if (num <= 8) {
ADC0_SC3 = ADC_SC3_CAL + ADC_SC3_AVGE + ADC_SC3_AVGS(1);
} else if (num <= 16) {
ADC0_SC3 = ADC_SC3_CAL + ADC_SC3_AVGE + ADC_SC3_AVGS(2);
} else {
ADC0_SC3 = ADC_SC3_CAL + ADC_SC3_AVGE + ADC_SC3_AVGS(3);
}
calibrating = 1;
}
void init_ADC16(void){
// Turn on the ADC0 clock as well as the PDB clocks to test ADC triggered by PDB
SIM_SCGC6 |= (SIM_SCGC6_ADC0_MASK );
// SIM_SCGC6 |= SIM_SCGC6_PDB_MASK ; pdb
PMC_REGSC |= PMC_REGSC_BGBE_MASK ;
// setup the initial ADC default configuration
Master_Adc_Config.CONFIG1 = ADLPC_LOW
| ADC_CFG1_ADIV(ADIV_1)
| ADLSMP_LONG
| ADC_CFG1_MODE(MODE_16)
| ADC_CFG1_ADICLK(ADICLK_BUS);
Master_Adc_Config.CONFIG2 = MUXSEL_ADCA
| ADACKEN_DISABLED
| ADHSC_HISPEED
| ADC_CFG2_ADLSTS(ADLSTS_20) ;
Master_Adc_Config.COMPARE1 = 0x1234u ; // can be anything
Master_Adc_Config.COMPARE2 = 0x5678u ; // can be anything
// since not using
// compare feature
Master_Adc_Config.STATUS2 = ADTRG_SW
| ACFE_DISABLED
| ACFGT_GREATER
| ACREN_DISABLED
| DMAEN_DISABLED
| ADC_SC2_REFSEL(REFSEL_EXT);
Master_Adc_Config.STATUS3 = CAL_OFF
| ADCO_SINGLE
| !AVGE_ENABLED
| ADC_SC3_AVGS(AVGS_4);
Master_Adc_Config.STATUS1A = !AIEN_ON | DIFF_SINGLE | ADC_SC1_ADCH(31);
// Configure ADC as it will be used, but becuase ADC_SC1_ADCH is 31,
// the ADC will be inactive. Channel 31 is just disable function.
// There really is no channel 31.
ADC_Config_Alt(ADC0_BASE_PTR, &Master_Adc_Config); // config ADC
// Calibrate the ADC in the configuration in which it will be used:
ADC_Cal(ADC0_BASE_PTR); // do the calibration
// The structure still has the desired configuration. So restore it.
// Why restore it? The calibration makes some adjustments to the
// configuration of the ADC. The are now undone:
// config the ADC again to desired conditions
ADC_Config_Alt(ADC0_BASE_PTR, &Master_Adc_Config);
}
//------------------------------------------------------------
// Configuration du convertisseur AD
//------------------------------------------------------------
void iAd_Config(void)
{
// Lets calibrate the ADC. 1st setup how the channel will be used.
disable_irq(INT_ADC1-16);
// ADC configuration register 1 (ADCx_CFG1)
// K10 Sub-Family Reference Manual, Rev. 6, Nov 2011 page 757
// ADLPC=0, Normal power configuration
// ADIV=0,The divide ratio is 1 and the clock rate is (input clock)/1
// ADLSMP=0,short sample time
// MODE=11,It is single-ended 16-bit conversion
// ADICLK=0,Bus clock divided by 1 --> 50MHz
ADC1_CFG1=0;
ADC1_CFG1|=(ADC_CFG1_ADIV(0)|ADC_CFG1_MODE(3)|ADC_CFG1_ADICLK(0));
// Configuration register 2 (ADCx_CFG2)
// K10 Sub-Family Reference Manual, Rev. 6, Nov 2011 page 759
// MUXSEL=0,ADxxa channels are selected
// ADACKEN=0,Asynchronous clock output disabled
// ADHSC=1,high speed conversion sequence selected
// ADLSTS=3,2 extra ADCK cycles; 6 ADCK cycles total sample time
ADC1_CFG2=0|ADC_CFG2_ADHSC_MASK|ADC_CFG2_ADLSTS(3);
// --> une conversion 5us --> 128 pixels: 640us
// Status and control register 2 (ADCx_SC2)
// K10 Sub-Family Reference Manual, Rev. 6, Nov 2011 page 762
// ADTRG=0,Software trigger selected
// ACFE=0,Compare function disabled
// ACFGT=0,Configures less than threshold, outside range not inclusive and inside range not inclusive functionality
// based on the values placed in the CV1 and CV2 registers
// ACREN=0,Range function disabled. Only the compare value 1 register (CV1) is compared
// DMAEN=0,DMA is disabled
// REFSEL=0,Default voltage reference pin pair (external pins VREFH and VREFL)
ADC1_SC2=0;
// Status and control register 2 (ADCx_SC3)
// K10 Sub-Family Reference Manual, Rev. 6, Nov 2011 page 764
// ADCO=0, One conversion or one set of conversions if the hardware average function is enabled (AVGE=1) after initiating a conversion.
// AVGE=0, Hardware average function disabled
// AVGS=0, 4 samples averaged
ADC1_SC3=0|ADC_SC3_AVGE_MASK|ADC_SC3_AVGS(0);
// ADC status and control registers 1 (ADCx_SC1n)
// K10 Sub-Family Reference Manual, Rev. 6, Nov 2011 page 754
// AIEN=0,Conversion complete interrupt disabled
// DIFF=0,Differential mode enable -> Single-ended conversions and input channels are selected
// ADCH=0x03,Input channel select -> POT1
ADC1_SC1A=0;
ADC1_SC1A=0|(ADC_SC1_ADCH(3));
}
void InitADC_12Bit()
{
SIM_SCGC6 |= SIM_SCGC6_ADC0_MASK;
// setup the initial ADC default configuration to get setup for calibration
Master_Adc_Config.CONFIG1 = ADLPC_NORMAL
| ADC_CFG1_ADIV(ADIV_4)
| ADLSMP_LONG
| ADC_CFG1_MODE(MODE_12)
| ADC_CFG1_ADICLK(ADICLK_BUS);
Master_Adc_Config.CONFIG2 = MUXSEL_ADCA
| ADACKEN_DISABLED
| ADHSC_HISPEED
| ADC_CFG2_ADLSTS(ADLSTS_20) ;
Master_Adc_Config.COMPARE1 = 0x1234u ; // can be anything
Master_Adc_Config.COMPARE2 = 0x5678u ; // can be anything
// since not using
// compare feature
Master_Adc_Config.STATUS2 =
ACFE_DISABLED
| ACFGT_GREATER
| ACREN_ENABLED
| DMAEN_DISABLED
| ADC_SC2_REFSEL(REFSEL_EXT);
Master_Adc_Config.STATUS3 = CAL_OFF
| ADCO_SINGLE
| AVGE_ENABLED
| ADC_SC3_AVGS(AVGS_16);
Master_Adc_Config.STATUS1A = AIEN_OFF | DIFF_SINGLE | ADC_SC1_ADCH(31);
Master_Adc_Config.STATUS1B = AIEN_OFF | DIFF_SINGLE | ADC_SC1_ADCH(31);
// Configure ADC as it will be used, but becuase ADC_SC1_ADCH is 31,
// the ADC will be inactive. Channel 31 is just disable function.
// There really is no channel 31.
ADC_Config_Alt(ADC0_BASE_PTR, &Master_Adc_Config); // config ADC
// Calibrate the ADC in the configuration in which it will be used:
ADC_Cal(ADC0_BASE_PTR); // do the calibration
// The structure still has the desired configuration. So restore it.
// Why restore it? The calibration makes some adjustments to the
// configuration of the ADC. The are now undone:
// config the ADC again to desired conditions
ADC_Config_Alt(ADC0_BASE_PTR, &Master_Adc_Config);
// *****************************************************************************
// ADC0 using the PDB trigger in ping pong
// *****************************************************************************
// use interrupts, single ended mode, and real channel numbers now:
ADC_Config_Alt(ADC0_BASE_PTR, &Master_Adc_Config); // config ADC0
}
void CIO::startInt()
{
// Initialise ADC0 conversion to be triggered by the PDB
ADC0_CFG1 = ADC_CFG1_ADIV(1) | ADC_CFG1_ADICLK(1) | ADC_CFG1_MODE(1) |
ADC_CFG1_ADLSMP; // Single-ended 12 bits, long sample time
ADC0_CFG2 = ADC_CFG2_MUXSEL | ADC_CFG2_ADLSTS(2); // Select channels ADxxxb
ADC0_SC2 = ADC_SC2_REFSEL(1) | ADC_SC2_ADTRG; // Voltage ref internal, hardware trigger
ADC0_SC3 = ADC_SC3_AVGE | ADC_SC3_AVGS(0); // Enable averaging, 4 samples
ADC0_SC1A = ADC_SC1_AIEN | 5; // Enable ADC interrupt, use A0
NVIC_ENABLE_IRQ(IRQ_ADC0);
// Setup PDB for ADC0 at 24 kHz
SIM_SCGC6 |= SIM_SCGC6_PDB; // Enable PDB clock
#if F_BUS == 60000000
// 60 MHz for the Teensy 3.5/3.6
PDB0_MOD = 2500; // Timer period for 60 MHz bus
#else
// 48 MHz for the Teensy 3.1/3.2
PDB0_MOD = 2000; // Timer period for 48 MHz bus
#endif
PDB0_IDLY = 0; // Interrupt delay
PDB0_CH0C1 = PDB_CH0C1_TOS | PDB_CH0C1_EN; // Enable pre-trigger
PDB0_SC = PDB_SC_TRGSEL(15) | PDB_SC_PDBEN | PDB_SC_PDBIE |
PDB_SC_CONT | PDB_SC_PRESCALER(7) | PDB_SC_MULT(1) |
PDB_SC_LDOK;
PDB0_SC |= PDB_SC_SWTRIG; // Software trigger (reset and restart counter)
#if defined(SEND_RSSI_DATA)
// Initialise ADC1 conversion to be triggered by the PDB
// Setup interrupt on ADC1 conversion finished
// Setup PDB for ADC1 at 24 kHz
#endif
// Initialise the DAC
SIM_SCGC2 |= SIM_SCGC2_DAC0;
DAC0_C0 = DAC_C0_DACEN | DAC_C0_DACRFS; // 1.2V VDDA is DACREF_2
digitalWrite(PIN_PTT, m_pttInvert ? HIGH : LOW);
digitalWrite(PIN_COSLED, LOW);
digitalWrite(PIN_LED, HIGH);
}
/*************************************************************************
* 野火嵌入式開發工作室
*
* 函數名稱：adc_start
* 功能說明：啟動adc軟件采樣，B通道不能用於軟件觸發！！！！
* 參數說明：ADCx 模塊號（ ADC0、 ADC1）
* ADC_Channel 通道號
* ADC_nbit 精度（ ADC_8bit,ADC_12bit, ADC_10bit, ADC_16bit ）
* 函數返回：無
* 修改時間：2012-2-10
* 備 注：修改蘇州大學的例程
*************************************************************************/
void adc_start(ADCn adcn,ADC_Ch ch,ADC_nbit bit)
{
Master_Adc_Config.STATUS1A = AIEN_ON | DIFF_SINGLE | ADC_SC1_ADCH( ch );
//初始化ADC默認配置
Master_Adc_Config.CONFIG1 = ADLPC_NORMAL
| ADC_CFG1_ADIV(ADIV_4)
| ADLSMP_LONG
| ADC_CFG1_MODE(bit)
| ADC_CFG1_ADICLK(ADICLK_BUS);
Master_Adc_Config.CONFIG2 = MUXSEL_ADCB //MUXSEL_ADCB
| ADACKEN_DISABLED
| ADHSC_HISPEED
| ADC_CFG2_ADLSTS(ADLSTS_20) ;
Master_Adc_Config.COMPARE1 = 0x1234u ; //任意值
Master_Adc_Config.COMPARE2 = 0x5678u ; //任意值
adc_config_alt(ADCx[adcn], &Master_Adc_Config); // 配置 ADCn
}
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;
}
void analog_init(void)
{
uint32_t num;
#if defined(__MK20DX128__) || defined(__MK20DX256__) || defined(__MK64FX512__) || defined(__MK66FX1M0__)
VREF_TRM = 0x60;
VREF_SC = 0xE1; // enable 1.2 volt ref
#endif
if (analog_config_bits == 8) {
ADC0_CFG1 = ADC_CFG1_8BIT + ADC_CFG1_MODE(0);
ADC0_CFG2 = ADC_CFG2_MUXSEL + ADC_CFG2_ADLSTS(3);
#ifdef HAS_KINETIS_ADC1
ADC1_CFG1 = ADC_CFG1_8BIT + ADC_CFG1_MODE(0);
ADC1_CFG2 = ADC_CFG2_MUXSEL + ADC_CFG2_ADLSTS(3);
#endif
} else if (analog_config_bits == 10) {
ADC0_CFG1 = ADC_CFG1_10BIT + ADC_CFG1_MODE(2) + ADC_CFG1_ADLSMP;
ADC0_CFG2 = ADC_CFG2_MUXSEL + ADC_CFG2_ADLSTS(3);
#ifdef HAS_KINETIS_ADC1
ADC1_CFG1 = ADC_CFG1_10BIT + ADC_CFG1_MODE(2) + ADC_CFG1_ADLSMP;
ADC1_CFG2 = ADC_CFG2_MUXSEL + ADC_CFG2_ADLSTS(3);
#endif
} else if (analog_config_bits == 12) {
ADC0_CFG1 = ADC_CFG1_12BIT + ADC_CFG1_MODE(1) + ADC_CFG1_ADLSMP;
ADC0_CFG2 = ADC_CFG2_MUXSEL + ADC_CFG2_ADLSTS(2);
#ifdef HAS_KINETIS_ADC1
ADC1_CFG1 = ADC_CFG1_12BIT + ADC_CFG1_MODE(1) + ADC_CFG1_ADLSMP;
ADC1_CFG2 = ADC_CFG2_MUXSEL + ADC_CFG2_ADLSTS(2);
#endif
} else {
ADC0_CFG1 = ADC_CFG1_16BIT + ADC_CFG1_MODE(3) + ADC_CFG1_ADLSMP;
ADC0_CFG2 = ADC_CFG2_MUXSEL + ADC_CFG2_ADLSTS(2);
#ifdef HAS_KINETIS_ADC1
ADC1_CFG1 = ADC_CFG1_16BIT + ADC_CFG1_MODE(3) + ADC_CFG1_ADLSMP;
ADC1_CFG2 = ADC_CFG2_MUXSEL + ADC_CFG2_ADLSTS(2);
#endif
}
#if defined(__MK20DX128__)
if (analog_reference_internal) {
ADC0_SC2 = ADC_SC2_REFSEL(1); // 1.2V ref
} else {
ADC0_SC2 = ADC_SC2_REFSEL(0); // vcc/ext ref
}
#elif defined(__MK20DX256__) || defined(__MK64FX512__) || defined(__MK66FX1M0__)
if (analog_reference_internal) {
ADC0_SC2 = ADC_SC2_REFSEL(1); // 1.2V ref
ADC1_SC2 = ADC_SC2_REFSEL(1); // 1.2V ref
} else {
ADC0_SC2 = ADC_SC2_REFSEL(0); // vcc/ext ref
ADC1_SC2 = ADC_SC2_REFSEL(0); // vcc/ext ref
}
#elif defined(__MKL26Z64__)
if (analog_reference_internal) {
ADC0_SC2 = ADC_SC2_REFSEL(0); // external AREF
} else {
ADC0_SC2 = ADC_SC2_REFSEL(1); // vcc
}
#endif
num = analog_num_average;
if (num <= 1) {
ADC0_SC3 = ADC_SC3_CAL; // begin cal
#ifdef HAS_KINETIS_ADC1
ADC1_SC3 = ADC_SC3_CAL; // begin cal
#endif
} else if (num <= 4) {
ADC0_SC3 = ADC_SC3_CAL + ADC_SC3_AVGE + ADC_SC3_AVGS(0);
#ifdef HAS_KINETIS_ADC1
ADC1_SC3 = ADC_SC3_CAL + ADC_SC3_AVGE + ADC_SC3_AVGS(0);
#endif
} else if (num <= 8) {
ADC0_SC3 = ADC_SC3_CAL + ADC_SC3_AVGE + ADC_SC3_AVGS(1);
#ifdef HAS_KINETIS_ADC1
ADC1_SC3 = ADC_SC3_CAL + ADC_SC3_AVGE + ADC_SC3_AVGS(1);
#endif
} else if (num <= 16) {
ADC0_SC3 = ADC_SC3_CAL + ADC_SC3_AVGE + ADC_SC3_AVGS(2);
#ifdef HAS_KINETIS_ADC1
ADC1_SC3 = ADC_SC3_CAL + ADC_SC3_AVGE + ADC_SC3_AVGS(2);
#endif
} else {
ADC0_SC3 = ADC_SC3_CAL + ADC_SC3_AVGE + ADC_SC3_AVGS(3);
#ifdef HAS_KINETIS_ADC1
ADC1_SC3 = ADC_SC3_CAL + ADC_SC3_AVGE + ADC_SC3_AVGS(3);
#endif
}
calibrating = 1;
}
void CIO::startInt()
{
// Initialise the DAC
SIM_SCGC2 |= SIM_SCGC2_DAC0;
DAC0_C0 = DAC_C0_DACEN | DAC_C0_DACRFS; // 3.3V VDDA is DACREF_2
// Initialise ADC0
SIM_SCGC6 |= SIM_SCGC6_ADC0;
ADC0_CFG1 = ADC_CFG1_ADIV(1) | ADC_CFG1_ADICLK(1) | // Single-ended 12 bits, long sample time
ADC_CFG1_MODE(1) | ADC_CFG1_ADLSMP;
ADC0_CFG2 = ADC_CFG2_MUXSEL | ADC_CFG2_ADLSTS(2); // Select channels ADxxxb
ADC0_SC2 = ADC_SC2_REFSEL(0) | ADC_SC2_ADTRG; // Voltage ref external, hardware trigger
ADC0_SC3 = ADC_SC3_AVGE | ADC_SC3_AVGS(0); // Enable averaging, 4 samples
ADC0_SC3 |= ADC_SC3_CAL;
while (ADC0_SC3 & ADC_SC3_CAL) // Wait for calibration
;
uint16_t sum0 = ADC0_CLPS + ADC0_CLP4 + ADC0_CLP3 + // Plus side gain
ADC0_CLP2 + ADC0_CLP1 + ADC0_CLP0;
sum0 = (sum0 / 2U) | 0x8000U;
ADC0_PG = sum0;
ADC0_SC1A = ADC_SC1_AIEN | PIN_ADC; // Enable ADC interrupt, use A0
NVIC_ENABLE_IRQ(IRQ_ADC0);
#if defined(SEND_RSSI_DATA)
// Initialise ADC1
SIM_SCGC3 |= SIM_SCGC3_ADC1;
ADC1_CFG1 = ADC_CFG1_ADIV(1) | ADC_CFG1_ADICLK(1) | // Single-ended 12 bits, long sample time
ADC_CFG1_MODE(1) | ADC_CFG1_ADLSMP;
ADC1_CFG2 = ADC_CFG2_MUXSEL | ADC_CFG2_ADLSTS(2); // Select channels ADxxxb
ADC1_SC2 = ADC_SC2_REFSEL(0); // Voltage ref external, software trigger
ADC1_SC3 = ADC_SC3_AVGE | ADC_SC3_AVGS(0); // Enable averaging, 4 samples
ADC1_SC3 |= ADC_SC3_CAL;
while (ADC1_SC3 & ADC_SC3_CAL) // Wait for calibration
;
uint16_t sum1 = ADC1_CLPS + ADC1_CLP4 + ADC1_CLP3 + // Plus side gain
ADC1_CLP2 + ADC1_CLP1 + ADC1_CLP0;
sum1 = (sum1 / 2U) | 0x8000U;
ADC1_PG = sum1;
#endif
#if defined(EXTERNAL_OSC)
// Set ADC0 to trigger from the LPTMR at 24 kHz
SIM_SOPT7 = SIM_SOPT7_ADC0ALTTRGEN | // Enable ADC0 alternate trigger
SIM_SOPT7_ADC0TRGSEL(14); // Trigger ADC0 by LPTMR0
CORE_PIN13_CONFIG = PORT_PCR_MUX(3);
SIM_SCGC5 |= SIM_SCGC5_LPTIMER; // Enable Low Power Timer Access
LPTMR0_CSR = 0; // Disable
LPTMR0_PSR = LPTMR_PSR_PBYP; // Bypass prescaler/filter
LPTMR0_CMR = (EXTERNAL_OSC / 24000) - 1; // Frequency divided by CMR + 1
LPTMR0_CSR = LPTMR_CSR_TPS(2) | // Pin: 0=CMP0, 1=xtal, 2=pin13
LPTMR_CSR_TMS; // Mode Select, 0=timer, 1=counter
LPTMR0_CSR |= LPTMR_CSR_TEN; // Enable
#else
// Setup PDB for ADC0 at 24 kHz
SIM_SCGC6 |= SIM_SCGC6_PDB; // Enable PDB clock
PDB0_MOD = (F_BUS / 24000) - 1; // Timer period - 1
PDB0_IDLY = 0; // Interrupt delay
PDB0_CH0C1 = PDB_CHnC1_TOS | PDB_CHnC1_EN; // Enable pre-trigger for ADC0
PDB0_SC = PDB_SC_TRGSEL(15) | PDB_SC_PDBEN | // SW trigger, enable interrupts, continuous mode
PDB_SC_PDBIE | PDB_SC_CONT | PDB_SC_LDOK; // No prescaling
PDB0_SC |= PDB_SC_SWTRIG; // Software trigger (reset and restart counter)
#endif
digitalWrite(PIN_PTT, m_pttInvert ? HIGH : LOW);
digitalWrite(PIN_COSLED, LOW);
digitalWrite(PIN_LED, HIGH);
}
uint8_t Hw_Trig_Test(void)
{
// Notes:
// PDB settings : continous mode, started by sotware trigger.
// This means that once the software "pulls the trigger" by setting a certain bit, the PDB starts counting
// and handing out four triggers per cycle of its counter.
// PDB settings: CH0_DLY0, CH0_DLY1 , CH1_DLY0, CH1_DLY1
// set to different values to distinguish effect on ADCx_Ry register
// need to provide 4 different voltages to convert at two ADC0 and two ADC1 input channels
// PDB counter clock prescaled to allow time for printf's and slow down things to they are visible, each trigger.
// Using adiclk= BUS , and adidiv/4 to get 12,5MHz on Tower demonstration.
// visibility of PDB start trigger is obtained by generating a toggling edge on
// GPIOxx with PDBisr set to trigger immediatly at zero value of PDB counter.
// Conversion end of each ADC and channel within the ADC ( A,B ) will be done by
// toggling second GPIO pin inside ADCisr ( this pin is also reset by PDB isr )
// GPIO PIN to low voltage .. this macro sets the PIN low.
PIN_LOW
// Initialize PIN1 and PIN2 GPIO outputs
Init_Gpio2();
// Disable ADC and PDB interrupts
disable_irq(ADC0_irq_no) ; // not ready for this interrupt yet. Plug vector first.
disable_irq(ADC1_irq_no) ; // not ready for this interrupt yet. Plug vector first.
disable_irq(PDB_irq_no) ; // not ready for this interrupt yet. Plug vector first.
// Dynamic interrupt vector modification whilst those interruts are disabled
__VECTOR_RAM[73] = (uint32)adc0_isr; // plug isr into vector table in case not there already
__VECTOR_RAM[74] = (uint32)adc1_isr; // plug isr into vector table in case not there already
__VECTOR_RAM[88] = (uint32)pdb_isr; // plug isr into vector table in case not there already
// The System Integration Module largely determines the role of the different ball map locations on Kinetis.
// When an external pin is used, the System Integration Module should be consulted and invoked as needed.
// System integration module registers start with SIM_
// Turn on the ADC0 and ADC1 clocks as well as the PDB clocks to test ADC triggered by PDB
SIM_SCGC6 |= (SIM_SCGC6_ADC0_MASK );
SIM_SCGC3 |= (SIM_SCGC3_ADC1_MASK );
SIM_SCGC6 |= SIM_SCGC6_PDB_MASK ;
// Configure System Integration Module for defaults as far as ADC
SIM_SOPT7 &= ~(SIM_SOPT7_ADC1ALTTRGEN_MASK | // selects PDB not ALT trigger
SIM_SOPT7_ADC1PRETRGSEL_MASK |
SIM_SOPT7_ADC0ALTTRGEN_MASK | // selects PDB not ALT trigger
SIM_SOPT7_ADC0ALTTRGEN_MASK) ;
SIM_SOPT7 = SIM_SOPT7_ADC0TRGSEL(0); // applies only in case of ALT trigger, in which case
// PDB external pin input trigger for ADC
SIM_SOPT7 = SIM_SOPT7_ADC1TRGSEL(0); // same for both ADCs
/////////////////////////////////////////////////////////////////////////////////////////
//PDB configured below 以下是PDB配置
// Configure the Peripheral Delay Block (PDB):
// enable PDB, pdb counter clock = busclock / 20 , continous triggers, sw trigger , and use prescaler too
PDB0_SC = PDB_SC_CONT_MASK // Contintuous, rather than one-shot, mode
| PDB_SC_PDBEN_MASK // PDB enabled
| PDB_SC_PDBIE_MASK // PDB Interrupt Enable
| PDB_SC_PRESCALER(0x5) // Slow down the period of the PDB for testing
| PDB_SC_TRGSEL(0xf) // Trigger source is Software Trigger to be invoked in this file
| PDB_SC_MULT(2); // Multiplication factor 20 for the prescale divider for the counter clock
// the software trigger, PDB_SC_SWTRIG_MASK is not triggered at this time.
PDB0_IDLY = 0x0000; // need to trigger interrupt every counter reset which happens when modulus reached
PDB0_MOD = 0xffff; // largest period possible with the slections above, so slow you can see each conversion.
// channel 0 pretrigger 0 and 1 enabled and delayed
PDB0_CH0C1 = PDB_C1_EN(0x01)
| PDB_C1_TOS(0x01)
| PDB_C1_EN(0x02)
| PDB_C1_TOS(0x02) ;
PDB0_CH0DLY0 = ADC0_DLYA ;
PDB0_CH0DLY1 = ADC0_DLYB ;
// channel 1 pretrigger 0 and 1 enabled and delayed
PDB0_CH1C1 = PDB_C1_EN(0x01)
| PDB_C1_TOS(0x01)
| PDB_C1_EN(0x02)
| PDB_C1_TOS(0x02) ;
PDB0_CH1DLY0 = ADC1_DLYA ;
PDB0_CH1DLY1 = ADC1_DLYB ;
PDB0_SC = PDB_SC_CONT_MASK // Contintuous, rather than one-shot, mode
| PDB_SC_PDBEN_MASK // PDB enabled
| PDB_SC_PDBIE_MASK // PDB Interrupt Enable
| PDB_SC_PRESCALER(0x5) // Slow down the period of the PDB for testing
| PDB_SC_TRGSEL(0xf) // Trigger source is Software Trigger to be invoked in this file
| PDB_SC_MULT(2) // Multiplication factor 20 for the prescale divider for the counter clock
| PDB_SC_LDOK_MASK; // Need to ok the loading or it will not load certain regsiters!
// the software trigger, PDB_SC_SWTRIG_MASK is not triggered at this time.
//PDB configured above 以上是PDB配置
/////////////////////////////////////////////////////////////////////////////////////////
//ADC configured below 以下是ADC配置
// setup the initial ADC default configuration
Master_Adc_Config.CONFIG1 = ADLPC_NORMAL
| ADC_CFG1_ADIV(ADIV_4)
| ADLSMP_LONG
| ADC_CFG1_MODE(MODE_16)
| ADC_CFG1_ADICLK(ADICLK_BUS);
Master_Adc_Config.CONFIG2 = MUXSEL_ADCA
| ADACKEN_DISABLED
| ADHSC_HISPEED
| ADC_CFG2_ADLSTS(ADLSTS_20) ;
Master_Adc_Config.COMPARE1 = 0x1234u ; // can be anything
Master_Adc_Config.COMPARE2 = 0x5678u ; // can be anything
// since not using
// compare feature
Master_Adc_Config.STATUS2 = ADTRG_HW
| ACFE_DISABLED
| ACFGT_GREATER
| ACREN_ENABLED
| DMAEN_DISABLED
| ADC_SC2_REFSEL(REFSEL_EXT);
Master_Adc_Config.STATUS3 = CAL_OFF
| ADCO_SINGLE
| AVGE_ENABLED
| ADC_SC3_AVGS(AVGS_32);
Master_Adc_Config.PGA = PGAEN_DISABLED
| PGACHP_NOCHOP
| PGALP_NORMAL
| ADC_PGA_PGAG(PGAG_64);
Master_Adc_Config.STATUS1A = AIEN_OFF | DIFF_SINGLE | ADC_SC1_ADCH(31);
Master_Adc_Config.STATUS1B = AIEN_OFF | DIFF_SINGLE | ADC_SC1_ADCH(31);
// Configure ADC as it will be used, but becuase ADC_SC1_ADCH is 31,
// the ADC will be inactive. Channel 31 is just disable function.
// There really is no channel 31.
ADC_Config_Alt(ADC0_BASE_PTR, &Master_Adc_Config); // config ADC
// Calibrate the ADC in the configuration in which it will be used:
ADC_Cal(ADC0_BASE_PTR); // do the calibration
// The structure still has the desired configuration. So restore it.
// Why restore it? The calibration makes some adjustments to the
// configuration of the ADC. The are now undone:
// config the ADC again to desired conditions
ADC_Config_Alt(ADC0_BASE_PTR, &Master_Adc_Config);
// REPEAT for BOTH ADC's. However we will only 'use' the results from
// the ADC wired to the Potentiometer on the Kinetis Tower Card.
// Repeating for ADC1:
ADC_Config_Alt(ADC1_BASE_PTR, &Master_Adc_Config); // config ADC
ADC_Cal(ADC1_BASE_PTR); // do the calibration
// ADC_Read_Cal(ADC1_BASE_PTR,&CalibrationStore[0]); // store the cal
// config the ADC again to default conditions
ADC_Config_Alt(ADC1_BASE_PTR, &Master_Adc_Config);
// *****************************************************************************
// ADC0 and ADC1 using the PDB trigger in ping pong
// *****************************************************************************
// use interrupts, single ended mode, and real channel numbers now:
Master_Adc_Config.STATUS1A = AIEN_ON | DIFF_SINGLE | ADC_SC1_ADCH(ADC0_CHANA);
Master_Adc_Config.STATUS1B = AIEN_ON | DIFF_SINGLE | ADC_SC1_ADCH(ADC0_CHANB);
ADC_Config_Alt(ADC0_BASE_PTR, &Master_Adc_Config); // config ADC0
Master_Adc_Config.STATUS1A = AIEN_ON | DIFF_SINGLE | ADC_SC1_ADCH(ADC1_CHANA);
Master_Adc_Config.STATUS1B = AIEN_ON | DIFF_SINGLE | ADC_SC1_ADCH(ADC1_CHANB);
ADC_Config_Alt(ADC1_BASE_PTR, &Master_Adc_Config); // config ADC1
// Note that three different balls are being sampled:
// ADC0_CHANA not used in this demo, but readings are shown
// ADC0_CHANB not used in this demo, but readings are shown
// ADC1_CHANA POT channel set the same as the following for demo: 20
// ADC1_CHANB POT channel set the same as the above for demo: 20
// The potentiometer is only on ADC1. That is the one used
// to calculate the change of the potentiometer below.
while(char_present()) in_char(); // flush terminal buffer
printf ("\n\n\n");
printf("********************************************************\n");
printf("* Running ADC0 & ADC1 HARDWARE TRIGGER by PDB *\n");
printf("* The one PDB is triggering both ADC0 and ADC1 *\n");
printf("* ADC1 A,B is the POT. Vary the POT setting. *\n");
printf("* Hit any key to exit (ADC0 readings not used) *\n");
printf("********************************************************\n");
printf ("\n\n");
// Enable the ADC and PDB interrupts in NVIC
enable_irq(ADC0_irq_no) ; // ready for this interrupt.
enable_irq(ADC1_irq_no) ; // ready for this interrupt.
enable_irq(PDB_irq_no) ; // ready for this interrupt.
// In case previous test did not end with interrupts enabled, enable used ones.
EnableInterrupts ;
cycle_flags=0;
PDB0_SC |= PDB_SC_SWTRIG_MASK ; // kick off the PDB - just once
//The system is now working!!!! The PDB is *continuously* triggering ADC
// conversions. Now, to display the results! The line above
// was the SOFTWARE TRIGGER...
// The demo will continue as long as no character is pressed on the terminal.
while(!char_present()) // as long as no operater intervention, keep running this:
{
while( cycle_flags != ( ADC0A_DONE | ADC0B_DONE | ADC1A_DONE | ADC1B_DONE )); // wait for one complete cycle
printf("R0A=%6d R0B=%6d R1A=%6d R1B=%6d POT=%6d\r",
result0A,result0B,result1A,result1B, exponentially_filtered_result1);
}
// disable the PDB
PDB0_SC = 0 ;
// Disable the ADC and PDB interrupts in NVIC
disable_irq(ADC0_irq_no) ; // through with this interrupt.
disable_irq(ADC1_irq_no) ; // through with this interrupt.
disable_irq(PDB_irq_no) ; // through with this interrupt.
printf ("\n\n\n");
printf("********************************************************\n");
printf("* Demonstration ended at operator request *\n");
printf("* ADC0 & ADC1 PDB TRIGGER DEMO COMPLETE *\n");
printf("********************************************************\n");
printf ("\n\n");
return 0;
}
//============================================================================
//函数名称：hw_ad_once
//函数返回：16位无符号的AD值
//参数说明：MoudelNumber：模块号
// Channel：通道号
// accuracy：精度
//功能概要：采集一次一路模拟量的AD值
//============================================================================
uint16 hw_adc_once(int MoudelNumber,int Channel,uint8 accuracy)//采集某路模拟量的AD值
{
uint16 result = 0;
uint8 ADCCfg1Mode = 0;
ADC_MemMapPtr ADCMoudel;//保存ADC模块地址指针
switch(accuracy)
{
case 8:
ADCCfg1Mode = 0x00;
break;
case 12:
ADCCfg1Mode = 0x01;
break;
case 10:
ADCCfg1Mode = 0x02;
break;
case 16:
ADCCfg1Mode = 0x03;
break;
default:
ADCCfg1Mode = 0x00;
}
if(MoudelNumber==0)//选择ADC模块0
{
ADCMoudel = ADC0_BASE_PTR;
}
else //选择ADC模块1
{
ADCMoudel = ADC1_BASE_PTR;
}
//配置正常电源模式，总线时钟，总线时钟4分频，长采样时间使能，设置精度
ADC_CFG1_REG(ADCMoudel) = ADLPC_NORMAL
| ADC_CFG1_ADIV(ADIV_4)
| ADLSMP_LONG
| ADC_CFG1_MODE(ADCCfg1Mode)
| ADC_CFG1_ADICLK(ADICLK_BUS);
//配置禁止异步时钟使能输出，ADxxat通道选择，高速配置，长采样时间
ADC_CFG2_REG(ADCMoudel) = MUXSEL_ADCA
| ADACKEN_DISABLED
| ADHSC_HISPEED
| ADC_CFG2_ADLSTS(ADLSTS_20) ;
//设置通道号
ADC_SC1_REG(ADCMoudel,A) = AIEN_ON | DIFF_SINGLE | ADC_SC1_ADCH(Channel);
//等待转换完成
while (( ADC_SC1_REG(ADCMoudel,A) & ADC_SC1_COCO_MASK ) != ADC_SC1_COCO_MASK)
{
}
//读取转化结果
result = ADC_R_REG(ADCMoudel,A);
//清ADC转换完成标志
ADC_SC1_REG(ADCMoudel,A) &= ~ADC_SC1_COCO_MASK;
return result;
}
////Initialize ADC Function. Needs to be placed somewhere??
void AnalogInputPin::InitADCs()
{
// setup the initial ADC default configuration
Master_Adc_Config.CONFIG1 = ADLPC_NORMAL // Normal power, (not low power)
| ADC_CFG1_ADIV(ADIV_4) // Clock divider
| ADLSMP_LONG // Take a long time to sample
| ADC_CFG1_MODE(MODE_16) // 16 bit mode
| ADC_CFG1_ADICLK(ADICLK_BUS); // use the bus clock
Master_Adc_Config.CONFIG2 = MUXSEL_ADCB // use channel A
| ADACKEN_DISABLED // Asynch clock disabled?
| ADHSC_NORMAL // Asynch clock setting
| ADC_CFG2_ADLSTS(ADLSTS_20) ;
Master_Adc_Config.COMPARE1 = 0x1234u ; // can be anything
Master_Adc_Config.COMPARE2 = 0x5678u ; // can be anything
// since not using
// compare feature
Master_Adc_Config.STATUS2 = ADTRG_SW // Software triggered conversion
| ACFE_DISABLED // Disable comparator (if enabled only registers as an anlog reading if it is greater than a certain value)
| ACFGT_GREATER // comparator setting
| ACREN_DISABLED // Compare Function Range disabled
| DMAEN_DISABLED // Disable DMA
| ADC_SC2_REFSEL(REFSEL_EXT); // external voltage reference
Master_Adc_Config.STATUS3 = CAL_OFF // Calibration begins off
| ADCO_SINGLE // Take a single reading
| AVGE_ENABLED // Enable averaging
| ADC_SC3_AVGS(AVGS_32); // Average 32 samples
Master_Adc_Config.PGA = PGAEN_DISABLED // PGA disabled
| PGACHP_NOCHOP // no chopping for PGA?
| PGALP_NORMAL // Normal (not low power mode)
| ADC_PGA_PGAG(PGAG_64); // PGA gain of 64
// Set up channel as all ones for configuration
Master_Adc_Config.STATUS1A = AIEN_OFF | DIFF_SINGLE | ADC_SC1_ADCH(31);
Master_Adc_Config.STATUS1B = AIEN_OFF | DIFF_SINGLE | ADC_SC1_ADCH(31);
// Configure ADC as it will be used, but becuase ADC_SC1_ADCH is 31,
// the ADC will be inactive. Channel 31 is just disable function.
// There really is no channel 31.
ADC_Config_Alt(ADC0_BASE_PTR, &Master_Adc_Config); // config ADC
ADC_Config_Alt(ADC1_BASE_PTR, &Master_Adc_Config); // config ADC
// Calibrate the ADC in the configuration in which it will be used:
ADC_Cal(ADC1_BASE_PTR); // do the calibration
ADC_Cal(ADC0_BASE_PTR); // do the calibration
// The structure still has the desired configuration. So restore it.
// Why restore it? The calibration makes some adjustments to the
// configuration of the ADC. The are now undone:
// config the ADC again to desired conditions
ADC_Config_Alt(ADC1_BASE_PTR, &Master_Adc_Config);
ADC_Config_Alt(ADC0_BASE_PTR, &Master_Adc_Config);
//Load Encoder ADC Config (A bit different from Master)
Encoder_Adc_Config = Master_Adc_Config;
Encoder_Adc_Config.CONFIG1 = ADLPC_NORMAL // Normal power, (not low power)
| ADC_CFG1_ADIV(ADIV_4) // Clock divider
| ADLSMP_LONG // Take a long time to sample
| ADC_CFG1_MODE(MODE_16) // 16 bit mode
| ADC_CFG1_ADICLK(ADICLK_BUS); // use the bus clock
Encoder_Adc_Config.STATUS3 = CAL_OFF // Calibration begins off
| ADCO_SINGLE // Take a single reading
| AVGE_ENABLED // Enable averaging
| ADC_SC3_AVGS(AVGS_4); // Average 4 samples
}
int adcc_init(int adc_num)
{
//PORT_MemMapPtr pctl = NULL;
//uint8_t gpio_port;
/* led pin init */
if(!lwgpio_init(&pm2p5_ledgpio, PM2P5_LED_PWREN, LWGPIO_DIR_OUTPUT, LWGPIO_VALUE_NOCHANGE)) {
printf("Initializing GPIO with associated pins failed.\n");
_time_delay (200L);
_task_block();
}
lwgpio_set_functionality(&pm2p5_ledgpio, PM2P5_LED_MUX_GPIO);
//lwgpio_set_value(&pm2p5_ledgpio, LWGPIO_VALUE_LOW);
lwgpio_set_value(&pm2p5_ledgpio, LWGPIO_VALUE_HIGH);
if(adc_num == 0) {
/* SIM_SCGC6: ADC0=1 */
adc_ptr = ADC0_BASE_PTR;
SIM_SCGC6 |= SIM_SCGC6_ADC0_MASK;
}
else {
adc_ptr = ADC1_BASE_PTR;
SIM_SCGC6 |= SIM_SCGC6_ADC1_MASK;
}
#ifdef ADC_HW_TRIGER
SIM_SCGC6 |= SIM_SCGC6_PIT_MASK; /* enable PIT */
SIM_SOPT7 |= SIM_SOPT7_ADC1ALTTRGEN_MASK;
SIM_SOPT7 |= (SIM_SOPT7_ADC1PRETRGSEL_MASK); /* Pre Trigger B */
SIM_SOPT7 &= ~(SIM_SOPT7_ADC1TRGSEL_MASK);
SIM_SOPT7 |= SIM_SOPT7_ADC1TRGSEL(7); /* PIT trigger 3 */
PIT_MCR_REG(PIT_BASE_PTR) = 0;
#endif
// pin mux config : spec P216 ADC0_DP0/ADC1_DP3 is default
/* set pin's multiplexer to analog
gpio_port = ADC_SIG_PORTB | 4;
pctl = (PORT_MemMapPtr) PORTB_BASE_PTR;
pctl->PCR[gpio_port & 0x1F] &= ~PORT_PCR_MUX_MASK;
*/
// Initialize ADC0/1 =================================================================================
//averages (4 h/w) // bus 60M /8/2 = 3.75M ADC clock
ADC_CFG1_REG(adc_ptr) = ADLPC_NORMAL | ADC_CFG1_ADIV(ADIV_8) /*| ADLSMP_LONG*/ | ADC_CFG1_MODE(MODE_16)
| ADC_CFG1_ADICLK(/*ADICLK_BUS_2*/ADICLK_BUS);
// do calibration
if(adc_calibrate(adc_ptr))
printf("adc-%x calibrate failed\n",(int)adc_ptr);
/* channel A/B selected */
#ifdef ADC_HW_TRIGER
ADC_CFG2_REG(adc_ptr) = MUXSEL_ADCB | ADACKEN_ENABLED | ADHSC_HISPEED | ADC_CFG2_ADLSTS(ADLSTS_20);
#else
ADC_CFG2_REG(adc_ptr) = MUXSEL_ADCA /*| ADACKEN_ENABLED */| ADHSC_HISPEED | ADC_CFG2_ADLSTS(ADLSTS_20);
#endif
//ADC_CV1_REG(adc_ptr) = 0x0;
//ADC_CV2_REG(adc_ptr) = 0x0;
//ADC_SC1_REG(adc_ptr,0) = AIEN_ON | DIFF_SINGLE | ADC_SC1_ADCH(ADC_INPUT_CH); /* SC1 A */
//ADC_SC1_REG(adc_ptr,1) = AIEN_ON | DIFF_SINGLE | ADC_SC1_ADCH(ADC_INPUT_CH); /* SC1 B */
#ifdef ADC_HW_TRIGER
ADC_SC2_REG(adc_ptr) = ADTRG_HW /*ADTRG_SW*/ | ACFE_DISABLED | ACFGT_GREATER | ACREN_DISABLED
| DMAEN_DISABLED /* DMAEN_ENABLED*/| ADC_SC2_REFSEL(REFSEL_EXT);
#else
ADC_SC2_REG(adc_ptr) = ADTRG_SW /*| ACFE_DISABLED | ACFGT_GREATER | ACREN_DISABLED
| DMAEN_DISABLED*/ | ADC_SC2_REFSEL(REFSEL_EXT);
#endif
ADC_SC3_REG(adc_ptr) = /*ADC_SC3_CALF_MASK |*/ CAL_OFF | ADCO_SINGLE /*| AVGE_ENABLED | ADC_SC3_AVGS(AVGS_4)*/; /* averages 4 h/w */
}
void InitADC1()
{
tADC_Config Master_Adc1_Config;
SIM_SCGC3 |= (SIM_SCGC3_ADC1_MASK);
//Lets calibrate the ADC. 1st setup how the channel will be used.
disable_irq(INT_ADC1-16);
Master_Adc1_Config.CONFIG1 = ADLPC_NORMAL //No low power mode
| ADC_CFG1_ADIV(ADIV_4) //divide input by 4
| ADLSMP_LONG //long sample time
| ADC_CFG1_MODE(MODE_8)//single ended 8-bit conversion
| ADC_CFG1_ADICLK(ADICLK_BUS);
Master_Adc1_Config.CONFIG2 = MUXSEL_ADCA // select the A side of the ADC channel.
| ADACKEN_DISABLED
| ADHSC_HISPEED
| ADC_CFG2_ADLSTS(ADLSTS_2);//Extra long sample Time (20 extra clocks)
Master_Adc1_Config.COMPARE1 = 00000; // Comparators don't matter for calibration
Master_Adc1_Config.COMPARE1 = 0xFFFF;
Master_Adc1_Config.STATUS2 = ADTRG_HW //hardware triggers for calibration
| ACFE_DISABLED //disable comparator
| ACFGT_GREATER
| ACREN_ENABLED
| DMAEN_DISABLED //Disable DMA
| ADC_SC2_REFSEL(REFSEL_EXT); //External Reference
Master_Adc1_Config.STATUS3 = CAL_OFF
| ADCO_SINGLE
| AVGE_ENABLED
| ADC_SC3_AVGS(AVGS_4);
Master_Adc1_Config.PGA = 0; // Disable the PGA
// Configure ADC as it will be used, but because ADC_SC1_ADCH is 31,
// the ADC will be inactive. Channel 31 is just disable function.
// There really is no channel 31.
Master_Adc1_Config.STATUS1A = AIEN_ON | DIFF_SINGLE | ADC_SC1_ADCH(31);
// Master_Adc_Config.STATUS1B = AIEN_OFF | DIFF_SINGLE | ADC_SC1_ADCH(31);
ADC_Config_Alt(ADC1_BASE_PTR, &Master_Adc1_Config); // config ADC
// Calibrate the ADC in the configuration in which it will be used:
ADC_Cal(ADC1_BASE_PTR); // do the calibration
Master_Adc1_Config.STATUS2 = ACFE_DISABLED //disable comparator
| ACFGT_GREATER
| ACREN_ENABLED
| DMAEN_DISABLED //Disable DMA
| ADC_SC2_REFSEL(REFSEL_EXT); //External Reference
Master_Adc1_Config.STATUS3 = CAL_OFF
| ADCO_SINGLE;
ADC_Config_Alt(ADC1_BASE_PTR, &Master_Adc1_Config);
}
