/**
* \brief Initialize ADC and DAC used to simulate a temperature sensor
*
* DACB is used by the simulation plant to output a temperature reading of the
* oven plate. It is set up to output a voltage on pin B2 which is marked as
* ADC2 on header J2.
*
* ADCA is used in the control step and graphical interface to show the current
* temperature of the oven plate. It is set up to read a voltage on pin A4 which
* is marked as ADC4 on header J2.
*
* ADC2 and ADC4 should be connected together, so that the ADC samples the DAC
* directly.
*/
void main_init_adc_dac(void)
{
struct adc_config adc_conf;
struct adc_channel_config adcch_conf;
struct dac_config dac_conf;
/* Set up the DAC for the simulation to output "real" temperature */
dac_read_configuration(&DACB, &dac_conf);
dac_set_conversion_parameters(&dac_conf, DAC_REF_BANDGAP,
DAC_ADJ_RIGHT);
dac_set_active_channel(&dac_conf, DAC_CH0, 0);
dac_write_configuration(&DACB, &dac_conf);
dac_enable(&DACB);
/* Set up the ADC for the controller to read "real" temperature */
adc_read_configuration(&ADCA, &adc_conf);
adcch_read_configuration(&ADCA, ADC_CH0, &adcch_conf);
adc_set_conversion_parameters(&adc_conf, ADC_SIGN_ON, ADC_RES_12,
ADC_REF_BANDGAP);
adc_set_clock_rate(&adc_conf, 20000UL);
adc_set_conversion_trigger(&adc_conf, ADC_TRIG_MANUAL, 1, 0);
adc_write_configuration(&ADCA, &adc_conf);
adcch_set_input(&adcch_conf, ADCCH_POS_PIN4, ADCCH_NEG_NONE, 1);
adcch_write_configuration(&ADCA, ADC_CH0, &adcch_conf);
adc_enable(&ADCA);
adc_start_conversion(&ADCA, ADC_CH0);
/* Enable pull-down, so an open circuit can be detected */
ioport_set_pin_dir(J2_PIN4, IOPORT_DIR_INPUT);
ioport_set_pin_mode(J2_PIN4, IOPORT_MODE_PULLDOWN);
}
/**
* \brief Initialize ADC
*
* Here the averaging feature is disabled.
*/
static void main_adc_init(void)
{
/* ADC module configuration structure */
struct adc_config adc_conf;
/* ADC channel configuration structure */
struct adc_channel_config adcch_conf;
/* Configure the ADC module:
* - unsigned, more than 12-bit results
* - VCC /2 voltage reference
* - 200 kHz maximum clock rate
* - freerun conversion triggering
* - enabled internal temperature sensor
*/
adc_read_configuration(&ADCA, &adc_conf);
adc_set_conversion_parameters(&adc_conf, ADC_SIGN_OFF, ADC_RES_12,
ADC_REF_VCCDIV2);
adc_set_clock_rate(&adc_conf, 200000UL);
adc_set_conversion_trigger(&adc_conf, ADC_TRIG_FREERUN, 1, 0);
adc_enable_internal_input(&adc_conf, ADC_INT_TEMPSENSE);
adc_write_configuration(&ADCA, &adc_conf);
/* Configure ADC channel 0:
* - single-ended measurement from temperature sensor
* - interrupt flag set on completed conversion
*/
adcch_read_configuration(&ADCA, ADC_CH0, &adcch_conf);
adcch_set_input(&adcch_conf, ADCCH_POS_TEMPSENSE, ADCCH_NEG_NONE, 1);
adcch_set_interrupt_mode(&adcch_conf, ADCCH_MODE_COMPLETE);
adcch_disable_interrupt(&adcch_conf);
adcch_write_configuration(&ADCA, ADC_CH0, &adcch_conf);
/* Enable ADC which starts the freerun conversion.*/
adc_enable(&ADCA);
}
int adc_init(void)
{
/* Offset Measurement*/
/*
struct adc_config adc_conf;
struct adc_channel_config adcch_conf;
adc_read_configuration(&MY_ADC, &adc_conf);
adcch_read_configuration(&MY_ADC, MY_ADC_CH, &adcch_conf);
adc_set_conversion_parameters(&adc_conf, ADC_SIGN_ON, ADC_RES_12, ADC_REF_AREFA);
adc_set_conversion_trigger(&adc_conf, ADC_TRIG_MANUAL, 1, 0);
adc_set_clock_rate(&adc_conf, 62500UL);
adcch_set_input(&adcch_conf, ADCCH_POS_PIN4, ADCCH_NEG_PIN4, 1);
adc_write_configuration(&MY_ADC, &adc_conf);
adcch_write_configuration(&MY_ADC, MY_ADC_CH, &adcch_conf);
adc_enable(&MY_ADC);
*/
/* Normal Measurement*/
struct adc_config adc_conf;
struct adc_channel_config adcch_conf;
adc_read_configuration(&MY_ADC, &adc_conf);
adcch_read_configuration(&MY_ADC, MY_ADC_CH, &adcch_conf);
adc_set_conversion_parameters(&adc_conf, ADC_SIGN_OFF, ADC_RES_12, ADC_REF_AREFA);
adc_set_conversion_trigger(&adc_conf, ADC_TRIG_MANUAL, 1, 0);
adc_set_clock_rate(&adc_conf, 62500UL);
adcch_set_input(&adcch_conf, ADCCH_POS_PIN4, ADCCH_NEG_NONE, 1); //PAD_GND
adc_write_configuration(&MY_ADC, &adc_conf);
adcch_write_configuration(&MY_ADC, MY_ADC_CH, &adcch_conf);
adc_enable(&MY_ADC);
return 0;
}
/**
* \brief Callback function for ADC interrupts
*
* \param adc Pointer to ADC module.
* \param channel ADC channel number.
* \param result Conversion result from ADC channel.
*/
static void adc_handler(ADC_t *adc, uint8_t channel, adc_result_t result)
{
switch (adc_conv[adc_mux_index].in) {
case EXT_VIN_ADC_INPUT:
ext_voltage=result;
adc_mux_index++;
//start new measurement
adc_disable(&EXT_VIN_ADC_MODULE);
adc_set_conversion_parameters(&adc_conf
,ADC_SIGN_OFF
,ADC_RES_12
,adc_conv[adc_mux_index].ref);
adc_write_configuration(
&POTENTIOMETER_ADC_MODULE
, &adc_conf);
adc_enable(&POTENTIOMETER_ADC_MODULE);
adcch_set_input(&adcch_conf
,adc_conv[adc_mux_index].in
,ADCCH_NEG_NONE,1);
adcch_write_configuration(
&POTENTIOMETER_ADC_MODULE
, ADC_CH0, &adcch_conf);
adc_start_conversion(&POTENTIOMETER_ADC_MODULE
, ADC_CH0);
break;
case POTENTIOMETER_ADC_INPUT:
potentiometer=result;
break;
default:
break;
}
}
/**
* \brief Configure the ADC for DAC calibration
*/
static void configure_adc(void)
{
struct adc_config adc_conf;
struct adc_channel_config adcch_conf;
adc_read_configuration(&CALIBRATION_ADC, &adc_conf);
adcch_read_configuration(&CALIBRATION_ADC, ADC_CH_TO_DAC_CH0, &adcch_conf);
adc_set_conversion_parameters(&adc_conf, ADC_SIGN_ON, ADC_RES_12, ADC_REF_VCC);
adc_set_conversion_trigger(&adc_conf, ADC_TRIG_MANUAL, 2, 0);
adc_set_clock_rate(&adc_conf, 62500UL);
adcch_set_input(&adcch_conf, ADCCH_POS_PIN1, ADCCH_NEG_PIN1, 1);
adc_write_configuration(&CALIBRATION_ADC, &adc_conf);
adcch_write_configuration(&CALIBRATION_ADC, ADC_CH_TO_DAC_CH0, &adcch_conf);
/* Find the offset of the ADC */
adc_enable(&CALIBRATION_ADC);
adc_offset = adc_get_sample_avg(ADC_CH_TO_DAC_CH0, 128);
adc_disable(&CALIBRATION_ADC);
/* Switch input to the DAC output pin PB3, i.e. ADC pin 11 */
adcch_set_input(&adcch_conf, ADCCH_POS_PIN10, ADCCH_NEG_PAD_GND, 1);
adcch_write_configuration(&CALIBRATION_ADC, ADC_CH_TO_DAC_CH0, &adcch_conf);
adcch_set_input(&adcch_conf, ADCCH_POS_PIN11, ADCCH_NEG_PAD_GND, 1);
adcch_write_configuration(&CALIBRATION_ADC, ADC_CH_TO_DAC_CH1, &adcch_conf);
adc_enable(&CALIBRATION_ADC);
}
void adcInit()
{
struct adc_config adc_conf;
struct adc_channel_config adc_ch_conf;
/* Clear the ADC configuration structs */
adc_read_configuration(&ADCA, &adc_conf);
adcch_read_configuration(&ADCA, ADC_CH0, &adc_ch_conf);
adc_set_conversion_parameters(&adc_conf, ADC_SIGN_ON, ADC_RES_12,
ADC_REF_VCC);
adc_set_clock_rate(&adc_conf, 100000UL);
adc_set_conversion_trigger(&adc_conf, ADC_TRIG_MANUAL, 0, 0);
adc_write_configuration(&ADCA, &adc_conf);
//adc_set_callback(&ADCA, &adc_handler);
adcch_set_input(&adc_ch_conf, ADCCH_POS_PIN0, ADCCH_NEG_PIN5, 1);
//adcch_set_interrupt_mode(&adc_ch_conf, ADCCH_MODE_COMPLETE);
//adcch_enable_interrupt(&adc_ch_conf);
adcch_write_configuration(&ADCA, ADC_CH1, &adc_ch_conf);
adcch_set_input(&adc_ch_conf, ADCCH_POS_PIN0, ADCCH_NEG_PIN6, 1);
adcch_write_configuration(&ADCA, ADC_CH0, &adc_ch_conf);
adc_enable(&ADCA);
}
int main(void)
{
struct adc_config adc_conf;
struct adc_channel_config adcch_conf;
board_init();
sysclk_init();
sleepmgr_init();
irq_initialize_vectors();
cpu_irq_enable();
gfx_mono_init();
// Enable back light of display
ioport_set_pin_high(LCD_BACKLIGHT_ENABLE_PIN);
// Initialize configuration structures.
adc_read_configuration(&ADCA, &adc_conf);
adcch_read_configuration(&ADCA, ADC_CH0, &adcch_conf);
/* Configure the ADC module:
* - unsigned, 12-bit results
* - VCC voltage reference
* - 200 kHz maximum clock rate
* - manual conversion triggering
* - temperature sensor enabled
* - callback function
*/
adc_set_conversion_parameters(&adc_conf, ADC_SIGN_ON, ADC_RES_12,
ADC_REF_VCC);
adc_set_clock_rate(&adc_conf, 200000UL);
adc_set_conversion_trigger(&adc_conf, ADC_TRIG_MANUAL, 1, 0);
adc_enable_internal_input(&adc_conf, ADC_INT_TEMPSENSE);
adc_write_configuration(&ADCA, &adc_conf);
adc_set_callback(&ADCA, &adc_handler);
/* Configure ADC channel 0:
* - single-ended measurement from temperature sensor
* - interrupt flag set on completed conversion
* - interrupts disabled
*/
adcch_set_input(&adcch_conf, ADCCH_POS_PIN1, ADCCH_NEG_NONE,
1);
adcch_set_interrupt_mode(&adcch_conf, ADCCH_MODE_COMPLETE);
adcch_enable_interrupt(&adcch_conf);
adcch_write_configuration(&ADCA, ADC_CH0, &adcch_conf);
// Enable the ADC and start the first conversion.
adc_enable(&ADCA);
adc_start_conversion(&ADCA, ADC_CH0);
do {
// Sleep until ADC interrupt triggers.
sleepmgr_enter_sleep();
} while (1);
}
int main(void)
{
struct adc_config adc_conf;
struct adc_channel_config adcch_conf;
board_init();
sysclk_init();
sleepmgr_init();
irq_initialize_vectors();
cpu_irq_enable();
// Initialize configuration structures.
adc_read_configuration(&ADCA, &adc_conf);
adcch_read_configuration(&ADCA, ADC_CH0, &adcch_conf);
/* Configure the ADC module:
* - unsigned, 12-bit results
* - bandgap (1 V) voltage reference
* - 200 kHz maximum clock rate
* - manual conversion triggering
* - temperature sensor enabled
* - callback function
*/
adc_set_conversion_parameters(&adc_conf, ADC_SIGN_OFF, ADC_RES_12,
ADC_REF_BANDGAP);
adc_set_clock_rate(&adc_conf, 200000UL);
adc_set_conversion_trigger(&adc_conf, ADC_TRIG_MANUAL, 1, 0);
adc_enable_internal_input(&adc_conf, ADC_INT_TEMPSENSE);
adc_write_configuration(&ADCA, &adc_conf);
adc_set_callback(&ADCA, &adc_handler);
/* Configure ADC channel 0:
* - single-ended measurement from temperature sensor
* - interrupt flag set on completed conversion
* - interrupts disabled
*/
adcch_set_input(&adcch_conf, ADCCH_POS_TEMPSENSE, ADCCH_NEG_NONE,
1);
adcch_set_interrupt_mode(&adcch_conf, ADCCH_MODE_COMPLETE);
adcch_enable_interrupt(&adcch_conf);
adcch_write_configuration(&ADCA, ADC_CH0, &adcch_conf);
// Get measurement for 85 degrees C (358 kelvin) from calibration data.
tempsense = adc_get_calibration_data(ADC_CAL_TEMPSENSE);
// Enable the ADC and start the first conversion.
adc_enable(&ADCA);
adc_start_conversion(&ADCA, ADC_CH0);
do {
// Sleep until ADC interrupt triggers.
sleepmgr_enter_sleep();
} while (1);
}
/**
* \internal
* \brief Test averaging conversion in 12-bit mode using the DAC
*
* These values are then measured using the ADC on the pins that are connected
* to the DAC channel, and the results are compared and checked to see if they
* are within the acceptable average of values that passes the test.
*
* \param test Current test case.
*/
static void run_averaging_conversion_test(
const struct test_case *test)
{
int16_t volt_output;
int16_t volt_min, volt_max, volt_input;
/* ADC module configuration structure */
struct adc_config adc_conf;
/* ADC channel configuration structure */
struct adc_channel_config adcch_conf;
adc_disable(&ADCA);
/* Change resolution parameter to accept averaging */
adc_read_configuration(&ADCA, &adc_conf);
adc_set_conversion_parameters(&adc_conf, ADC_SIGN_ON, ADC_RES_MT12,
ADC_REF_VCC);
adc_write_configuration(&ADCA, &adc_conf);
/* Enable averaging */
adcch_read_configuration(&ADCA, ADC_CH0, &adcch_conf);
adcch_enable_averaging(&adcch_conf, ADC_SAMPNUM_1024X);
adcch_write_configuration(&ADCA, ADC_CH0, &adcch_conf);
adc_enable(&ADCA);
adc_wait_for_interrupt_flag(&ADCA, ADC_CH0);
/* Check values */
for (volt_output = -CONV_MAX_VOLTAGE;
volt_output <= CONV_MAX_VOLTAGE;
volt_output += CONV_VOLTAGE_STEP) {
main_dac_output(volt_output);
/* first capture */
volt_input = main_adc_input();
volt_min = volt_max = volt_input;
/* several capture */
for (uint8_t i = 0; i < 5; i++) {
volt_input = main_adc_input();
if (volt_min > volt_input) {
volt_min = volt_input;
}
if (volt_max < volt_input) {
volt_max = volt_input;
}
}
test_assert_true(test,
(volt_max - volt_min) < CONF_TEST_ACCEPT_DELTA_AVERAGING,
"ADC result is not in acceptable stable range (Min %dmV, Max %dmV)",
volt_min, volt_max);
}
}
/**
* \brief Timer Counter Overflow interrupt callback function
*
* This function is called when an overflow interrupt has occurred on
* TCC0.
*/
static void tcc0_ovf_interrupt_callback(void)
{
adc_mux_index=0;
adc_disable(&EXT_VIN_ADC_MODULE);
adc_set_conversion_parameters(&adc_conf, ADC_SIGN_OFF, ADC_RES_12
,adc_conv[adc_mux_index].ref);
adc_write_configuration(&EXT_VIN_ADC_MODULE, &adc_conf);
adc_enable(&EXT_VIN_ADC_MODULE);
adcch_set_input(&adcch_conf, adc_conv[adc_mux_index].in
, ADCCH_NEG_NONE,1);
adcch_write_configuration(&EXT_VIN_ADC_MODULE, ADC_CH0, &adcch_conf);
adc_start_conversion(&EXT_VIN_ADC_MODULE, ADC_CH0);
}
void ADC_init_funct(void) {
struct adc_config adc_conf;
struct adc_channel_config adcch_conf;
adc_read_configuration(&MY_ADC, &adc_conf);
adcch_read_configuration(&MY_ADC, CAP_ADC, &adcch_conf);
adc_set_conversion_parameters(&adc_conf, ADC_SIGN_OFF, ADC_RES_12,ADC_REF_VCC);
adc_set_conversion_trigger(&adc_conf, ADC_TRIG_MANUAL, 1, 0);
adc_set_clock_rate(&adc_conf, 100000);
adcch_set_input(&adcch_conf, ADCCH_POS_PIN3, ADCCH_NEG_NONE, 1);
adc_write_configuration(&MY_ADC, &adc_conf);
adcch_write_configuration(&MY_ADC, CAP_ADC, &adcch_conf);
adc_enable (&MY_ADC);
}
void owltemp_init() {
struct adc_config adc_conf;
struct adc_channel_config adcch_conf;
// Clear the configuration structures.
memset(&adc_conf, 0, sizeof(struct adc_config));
memset(&adcch_conf, 0, sizeof(struct adc_channel_config));
/* Configure the ADC module:
* - unsigned, 12-bit results
* - bandgap (1 V) voltage reference
* - 200 kHz maximum clock rate
* - manual conversion triggering
* - temperature sensor enabled
* - callback function
*/
adc_set_conversion_parameters(&adc_conf, ADC_SIGN_OFF, ADC_RES_12,
ADC_REF_BANDGAP);
adc_set_clock_rate(&adc_conf, 200000UL);
adc_set_conversion_trigger(&adc_conf, ADC_TRIG_MANUAL, 0, 0);
adc_enable_internal_input(&adc_conf, ADC_INT_TEMPSENSE);
adc_write_configuration(&ADCA, &adc_conf);
adc_set_callback(&ADCA, &adc_handler);
/* Configure ADC channel 0:
* - single-ended measurement from temperature sensor
* - interrupt flag set on completed conversion
* - interrupts disabled
*/
adcch_set_input(&adcch_conf, ADCCH_POS_TEMPSENSE, ADCCH_NEG_NONE,
1);
adcch_set_interrupt_mode(&adcch_conf, ADCCH_MODE_COMPLETE);
adcch_enable_interrupt(&adcch_conf);
adcch_write_configuration(&ADCA, 0, &adcch_conf);
// Get measurement for 85 degrees C (358 kelvin) from calibration data.
tempsense = adc_get_calibration_data(ADC_CAL_TEMPSENSE);
// Enable the ADC and start the first conversion.
adc_enable(&ADCA);
adc_start_conversion(&ADCA, ADC_CH0);
}
static void adc_init(void)
{
struct adc_config adc_conf;
struct adc_channel_config adcch_conf;
adc_read_configuration(&MY_ADC, &adc_conf);
adcch_read_configuration(&MY_ADC, MY_ADC_CH, &adcch_conf);
adc_set_conversion_parameters(&adc_conf, ADC_SIGN_OFF, ADC_RES_12,
ADC_REF_AREFA);
adc_set_conversion_trigger(&adc_conf, ADC_TRIG_MANUAL, 1, 0);
adc_set_clock_rate(&adc_conf, 200000UL);
adcch_set_input(&adcch_conf, ADCCH_POS_PIN1, ADCCH_NEG_NONE, 1);
adc_write_configuration(&MY_ADC, &adc_conf);
adcch_write_configuration(&MY_ADC, MY_ADC_CH, &adcch_conf);
adc_enable(&MY_ADC);
adc_start_conversion(&MY_ADC, MY_ADC_CH);
}
/**
* \brief Initialize ADC
*/
static void main_adc_init(void)
{
/* ADC module configuration structure */
struct adc_config adc_conf;
/* ADC channel configuration structure */
struct adc_channel_config adcch_conf;
/* Configure the ADC module:
* - signed, 12-bit results
* - voltage reference = VCC / 1.6 = 3.3V / 1.6
* - 200 kHz maximum clock rate
* - manual conversion triggering
*/
adc_read_configuration(&ADCA, &adc_conf); /* Initialize structures. */
adc_set_conversion_parameters(&adc_conf, ADC_SIGN_ON, ADC_RES_12,
ADC_REF_VCC);
adc_set_clock_rate(&adc_conf, 200000UL);
adc_set_conversion_trigger(&adc_conf, ADC_TRIG_MANUAL, 1, 0);
adc_write_configuration(&ADCA, &adc_conf);
/* Configure ADC channel:
* - differential measurement mode
* - Input voltage V+ is ADC2 pin (PA2 pin)
* - Input voltage V- is ADC3 pin (PA3 pin)
* - 1x gain
* - interrupt flag set on completed conversion
*/
adcch_read_configuration(&ADCA, ADC_CH0, &adcch_conf);
adcch_set_input(&adcch_conf, ADCCH_POS_PIN2, ADCCH_NEG_PIN3, 1);
adcch_set_interrupt_mode(&adcch_conf, ADCCH_MODE_COMPLETE);
adcch_disable_interrupt(&adcch_conf);
adcch_write_configuration(&ADCA, ADC_CH0, &adcch_conf);
/* Enable ADC */
adc_enable(&ADCA);
/* Do useful conversion */
adc_start_conversion(&ADCA, ADC_CH0);
adc_wait_for_interrupt_flag(&ADCA, ADC_CH0);
}
/**
* \brief Disables over-sampling
*/
static void main_adc_oversampling_stop(void)
{
/* ADC module configuration structure */
struct adc_config adc_conf;
/* ADC channel configuration structure */
struct adc_channel_config adcch_conf;
adc_disable(&ADCA);
/* Set default resolution parameter */
adc_read_configuration(&ADCA, &adc_conf);
adc_set_conversion_parameters(&adc_conf, ADC_SIGN_OFF, ADC_RES_12,
ADC_REF_VCCDIV2);
adc_write_configuration(&ADCA, &adc_conf);
/* Disable over-sampling */
adcch_read_configuration(&ADCA, ADC_CH0, &adcch_conf);
adcch_disable_oversampling(&adcch_conf);
adcch_write_configuration(&ADCA, ADC_CH0, &adcch_conf);
adc_enable(&ADCA);
printf("\n\r* ADC over-sampling disabled\n\r");
}
/**
* \brief Enables over-sampling
*/
static void main_adc_oversampling_start(void)
{
/* ADC module configuration structure */
struct adc_config adc_conf;
/* ADC channel configuration structure */
struct adc_channel_config adcch_conf;
adc_disable(&ADCA);
/* Change resolution parameter to accept over-sampling */
adc_read_configuration(&ADCA, &adc_conf);
adc_set_conversion_parameters(&adc_conf, ADC_SIGN_OFF, ADC_RES_MT12,
ADC_REF_VCCDIV2);
adc_write_configuration(&ADCA, &adc_conf);
/* Enable over-sampling */
adcch_read_configuration(&ADCA, ADC_CH0, &adcch_conf);
adcch_enable_oversampling(&adcch_conf, ADC_SAMPNUM_1024X, 16);
adcch_write_configuration(&ADCA, ADC_CH0, &adcch_conf);
adc_enable(&ADCA);
printf("\n\r* ADC over-sampling enabled\n\r");
}
/**
* \brief Enables averaging
*/
static void main_adc_averaging(void)
{
/* ADC module configuration structure */
struct adc_config adc_conf;
/* ADC channel configuration structure */
struct adc_channel_config adcch_conf;
adc_disable(&ADCA);
/* Change resolution parameter to accept averaging */
adc_read_configuration(&ADCA, &adc_conf);
adc_set_conversion_parameters(&adc_conf, ADC_SIGN_ON, ADC_RES_MT12,
ADC_REF_VCC);
adc_write_configuration(&ADCA, &adc_conf);
/* Enable averaging */
adcch_read_configuration(&ADCA, ADC_CH0, &adcch_conf);
adcch_enable_averaging(&adcch_conf, ADC_SAMPNUM_1024X);
adcch_write_configuration(&ADCA, ADC_CH0, &adcch_conf);
adc_enable(&ADCA);
adc_wait_for_interrupt_flag(&ADCA, ADC_CH0);
}
int main(void)
{
struct adc_config adc_conf;
struct adc_channel_config adcch_conf;
board_init();
sysclk_init();
sleepmgr_init();
irq_initialize_vectors();
cpu_irq_enable();
// Initialize configuration structures.
adc_read_configuration(&ADCA, &adc_conf);
adcch_read_configuration(&ADCA, ADC_CH0, &adcch_conf);
/* Configure the ADC module:
* - unsigned, 12-bit results
* - bandgap (1 V) voltage reference
* - 200 kHz maximum clock rate
* - manual conversion triggering
*/
adc_set_conversion_parameters(&adc_conf, ADC_SIGN_OFF, ADC_RES_12,
ADC_REF_BANDGAP);
adc_set_clock_rate(&adc_conf, 200000UL);
adc_set_conversion_trigger(&adc_conf, ADC_TRIG_MANUAL, 1, 0);
adc_write_configuration(&ADCA, &adc_conf);
/* Configure ADC channel 0:
* - single-ended measurement from configured input pin
* - interrupt flag set on completed conversion
*/
adcch_set_input(&adcch_conf, INPUT_PIN, ADCCH_NEG_NONE,
1);
adcch_set_interrupt_mode(&adcch_conf, ADCCH_MODE_COMPLETE);
adcch_disable_interrupt(&adcch_conf);
adcch_write_configuration(&ADCA, ADC_CH0, &adcch_conf);
// Enable the ADC and do one dummy conversion.
adc_enable(&ADCA);
adc_start_conversion(&ADCA, ADC_CH0);
adc_wait_for_interrupt_flag(&ADCA, ADC_CH0);
// Light up LED 1, wait for button press.
ioport_set_pin_low(LED1_PIN);
wait_for_button();
// Perform oversampling of offset.
cal_data.offset = get_mean_sample_value();
// Light up LED 2, wait for button press.
ioport_set_pin_low(LED2_PIN);
wait_for_button();
// Perform oversampling of 0.9 V for gain calibration.
cal_data.gain = get_mean_sample_value() - cal_data.offset;
// Turn off LEDs.
ioport_set_pin_high(LED1_PIN);
ioport_set_pin_high(LED2_PIN);
// Enable interrupts on ADC channel, then trigger first conversion.
adcch_enable_interrupt(&adcch_conf);
adcch_write_configuration(&ADCA, ADC_CH0, &adcch_conf);
adc_start_conversion(&ADCA, ADC_CH0);
do {
// Sleep until ADC interrupt triggers.
sleepmgr_enter_sleep();
} while (1);
}
void alphasense_adc_getValue( void )
{
//ALPHASENSE_STATS * const ps = &g_internal;
struct adc_config adc_conf;
struct adc_channel_config adcch_conf;
uint8_t inputgain = 1;//, elements = 20;
//char szBUF[64];
// DISABLE jtag - it locks the upper 4 pins of PORT B
CCP = CCP_IOREG_gc; // Secret handshake
MCU.MCUCR = 0b00000001;
PORTB.PIN0CTRL = PORT_OPC_TOTEM_gc; // Auxiliary Electrode
PORTB.PIN2CTRL = PORT_OPC_TOTEM_gc; // Working Electrode
PORTB.PIN6CTRL = PORT_OPC_TOTEM_gc; // GND x offset
adc_read_configuration(&ALPHASENSE_ADC, &adc_conf);
adcch_read_configuration(&ALPHASENSE_ADC, ALPHASENSE_ADC_CH, &adcch_conf);
adc_set_conversion_parameters(&adc_conf, ADC_SIGN_OFF, ADC_RES_12, ADC_REF_VCC);
adc_set_conversion_trigger(&adc_conf, ADC_TRIG_MANUAL, 1, 0);
adc_set_clock_rate(&adc_conf, 200000UL);
adc_write_configuration(&ALPHASENSE_ADC, &adc_conf);
adcch_set_input(&adcch_conf, ADCCH_POS_PIN6, ADCCH_NEG_NONE, inputgain);
adcch_write_configuration(&ALPHASENSE_ADC, ALPHASENSE_ADC_CH, &adcch_conf);
adc_enable(&ALPHASENSE_ADC);
adc_start_conversion(&ALPHASENSE_ADC, ALPHASENSE_ADC_CH);
adc_wait_for_interrupt_flag(&ALPHASENSE_ADC, ALPHASENSE_ADC_CH);
adc_start_conversion(&ALPHASENSE_ADC, ALPHASENSE_ADC_CH);
adc_wait_for_interrupt_flag(&ALPHASENSE_ADC, ALPHASENSE_ADC_CH);
const int16_t off = adc_get_result(&ALPHASENSE_ADC, ALPHASENSE_ADC_CH);
adc_disable(&ALPHASENSE_ADC);
//sprintf_P(szBUF,PSTR("Offset: %u\t"),off);
//debug_string(NORMAL,szBUF,false);
//adcch_set_input(&adcch_conf, ADCCH_POS_BANDGAP, ADCCH_NEG_NONE, inputgain);
//adcch_write_configuration(&ALPHASENSE_ADC, ALPHASENSE_ADC_CH, &adcch_conf);
//adc_enable(&ALPHASENSE_ADC);
//adc_start_conversion(&ALPHASENSE_ADC, ALPHASENSE_ADC_CH);
//adc_wait_for_interrupt_flag(&ALPHASENSE_ADC, ALPHASENSE_ADC_CH);
//const uint16_t gain = adc_get_result(&ALPHASENSE_ADC, ALPHASENSE_ADC_CH);
//adc_disable(&ALPHASENSE_ADC);
////sprintf_P(szBUF,PSTR("gain: %u\t"),gain);
////debug_string(NORMAL,szBUF,false);
adcch_set_input(&adcch_conf, ADCCH_POS_PIN0, ADCCH_NEG_NONE, inputgain);
adcch_write_configuration(&ALPHASENSE_ADC, ALPHASENSE_ADC_CH, &adcch_conf);
adc_enable(&ALPHASENSE_ADC);
adc_start_conversion(&ALPHASENSE_ADC, ALPHASENSE_ADC_CH);
adc_wait_for_interrupt_flag(&ALPHASENSE_ADC, ALPHASENSE_ADC_CH);
adc_start_conversion(&ALPHASENSE_ADC, ALPHASENSE_ADC_CH);
adc_wait_for_interrupt_flag(&ALPHASENSE_ADC, ALPHASENSE_ADC_CH);
const int16_t adc_w = adc_get_result(&ALPHASENSE_ADC, ALPHASENSE_ADC_CH)-off;
adc_disable(&ALPHASENSE_ADC);
//sprintf_P(szBUF,PSTR("ADC_WORK: %u\t"),adc_w);
//debug_string(NORMAL,szBUF,false);
adcch_set_input(&adcch_conf, ADCCH_POS_PIN2, ADCCH_NEG_NONE, inputgain);
adcch_write_configuration(&ALPHASENSE_ADC, ALPHASENSE_ADC_CH, &adcch_conf);
adc_enable(&ALPHASENSE_ADC);
adc_start_conversion(&ALPHASENSE_ADC, ALPHASENSE_ADC_CH);
adc_wait_for_interrupt_flag(&ALPHASENSE_ADC, ALPHASENSE_ADC_CH);
adc_start_conversion(&ALPHASENSE_ADC, ALPHASENSE_ADC_CH);
adc_wait_for_interrupt_flag(&ALPHASENSE_ADC, ALPHASENSE_ADC_CH);
const int16_t adc_a = adc_get_result(&ALPHASENSE_ADC, ALPHASENSE_ADC_CH)-off;
adc_disable(&ALPHASENSE_ADC);
//sprintf_P(szBUF,PSTR("ADC_AUX: %u\r\n"),adc_a);
//debug_string(NORMAL,szBUF,false);
//adc_enable(&ALPHASENSE_ADC);
//
//for (int i=0;i<elements;i++)
//{
//adc_start_conversion(&ALPHASENSE_ADC, ALPHASENSE_ADC_CH);
//adc_wait_for_interrupt_flag(&ALPHASENSE_ADC, ALPHASENSE_ADC_CH);
//adc_start_conversion(&ALPHASENSE_ADC, ALPHASENSE_ADC_CH);
//adc_wait_for_interrupt_flag(&ALPHASENSE_ADC, ALPHASENSE_ADC_CH);
//result[i]=adc_get_result(&ALPHASENSE_ADC, ALPHASENSE_ADC_CH);
//
//}
//adc_disable(&ALPHASENSE_ADC);
PORTB.PIN0CTRL = PORT_OPC_PULLUP_gc;
PORTB.PIN2CTRL = PORT_OPC_PULLUP_gc;
PORTB.PIN6CTRL = PORT_OPC_PULLUP_gc;
g_recordingData_Alphasense = true;
g_partialSumWork+=(int32_t)adc_w;
g_partialSumAux+=(int32_t)adc_a;
g_partialCount_Alphasense++;
g_recordingData_Alphasense = false;
//sprintf_P(szBUF,PSTR("Sample: %u\tPartialSumWork: %lu\tPartialSumAux: %lu\r\n"),g_partialCount, g_partialSumWork,g_partialSumAux);
//debug_string(NORMAL,szBUF,false);
//ps->working = adc_w;
//ps->aux = adc_a;
}
void app_sampling_init(void)
{
/* QDec configuration */
qdec_get_config_defaults(&qdec_config);
qdec_config_phase_pins(&qdec_config, &PORTA, 6, false, 500);
qdec_config_enable_rotary(&qdec_config);
qdec_config_tc(&qdec_config, &TCC5);
qdec_config_revolution(&qdec_config, 40);
qdec_enabled(&qdec_config);
/* ! ADC module configuration */
struct adc_config adc_conf;
/* Configure the ADC module:
* - signed, 12-bit results
* - VCC reference
* - 200 kHz maximum clock rate
* - manual conversion triggering
* - callback function
*/
adc_read_configuration(&LIGHT_SENSOR_ADC_MODULE, &adc_conf);
adc_set_conversion_parameters(&adc_conf, ADC_SIGN_ON, ADC_RES_12,
ADC_REF_VCC);
adc_set_clock_rate(&adc_conf, 200000);
adc_set_conversion_trigger(&adc_conf, ADC_TRIG_MANUAL, 1, 0);
adc_write_configuration(&LIGHT_SENSOR_ADC_MODULE, &adc_conf);
adc_set_callback(&LIGHT_SENSOR_ADC_MODULE, &app_sampling_handler);
adc_enable(&LIGHT_SENSOR_ADC_MODULE);
/* Configure ADC A channel 0 for light and NTC sensors.
* - differantial measurement (V- linked on internal GND)
* - gain x0.5
* - interrupt flag set on completed conversion
* - interrupts enabled
*/
adcch_read_configuration(&LIGHT_SENSOR_ADC_MODULE, ADC_CH0,
&adcch_conf);
adcch_set_input(&adcch_conf, LIGHT_SENSOR_ADC_INPUT,
ADCCH_NEG_INTERNAL_GND, 0);
adcch_set_interrupt_mode(&adcch_conf, ADCCH_MODE_COMPLETE);
adcch_enable_interrupt(&adcch_conf);
adcch_write_configuration(&LIGHT_SENSOR_ADC_MODULE, ADC_CH0,
&adcch_conf);
fifo_init(&app_sampling_fifo_desc, app_sampling_fifo_buffer,
APP_SAMPLING_FIFO_SIZE);
rtc_set_callback(&app_sampling_start);
/* Display background */
gfx_mono_draw_line(DISPLAY_SAMPLING_TEXT_POS_X - 3,
0,
DISPLAY_SAMPLING_TEXT_POS_X - 3,
32,
GFX_PIXEL_SET);
app_sampling_display_rate();
gfx_mono_draw_string(DISPLAY_LIGHT_TEXT,
DISPLAY_LIGHT_TEXT_POS_X,
DISPLAY_LIGHT_TEXT_POS_Y,
&sysfont);
gfx_mono_draw_filled_rect(
DISPLAY_LIGHT_PROBAR_START_POS_X,
DISPLAY_LIGHT_PROBAR_START_POS_Y,
DISPLAY_LIGHT_PROBAR_START_SIZE_X,
DISPLAY_LIGHT_PROBAR_START_SIZE_Y,
GFX_PIXEL_SET);
gfx_mono_draw_filled_rect(
DISPLAY_LIGHT_PROBAR_STOP_POS_X,
DISPLAY_LIGHT_PROBAR_STOP_POS_Y,
DISPLAY_LIGHT_PROBAR_STOP_SIZE_X,
DISPLAY_LIGHT_PROBAR_STOP_SIZE_Y,
GFX_PIXEL_SET);
/* Start a RTC alarm immediatly */
rtc_set_alarm_relative(0);
}
/**
* \internal
* \brief Test differential conversion with gain in 12-bit mode using the DAC
*
* This test outputs a gain compensated level on DAC output that should result
* in a value of half maximum positive value on the ADC.
*
* These values are then measured using the ADC on the pins that are connected
* to the DAC channel, and the results are compared and checked to see if they
* are within the acceptable range of values that passes the test.
*
* \param test Current test case.
*/
static void run_differential_12bit_with_gain_conversion_test(
const struct test_case *test)
{
// Number of MUX inputs that are to be read
const uint8_t num_inputs = 2;
/* Connection between DAC outputs and ADC MUX inputs.
* Only the high nibble on PORTA is possible for gain.
* input 4, 6 is connected to DACA0
* input 5, 7 is connected to DACA1.
*/
const uint8_t channel_pos[] = {4, 6};
const uint8_t channel_neg[] = {5, 7};
/*
* Go through gain level up to 8, since any higher gives too much
* propagated error for sensible unit test limits.
*/
const uint8_t gain[] = {1, 2, 4, 8};
uint8_t gain_index;
uint8_t adc_channel;
uint8_t mux_index;
int16_t results[2];
struct dac_config dac_conf;
struct adc_config adc_conf;
// Configure ADC
adc_read_configuration(&ADCA, &adc_conf);
adc_set_conversion_parameters(&adc_conf, ADC_SIGN_ON, ADC_RES_12,
ADC_REF_BANDGAP);
adc_set_clock_rate(&adc_conf, 2000UL);
adc_set_conversion_trigger(&adc_conf, ADC_TRIG_MANUAL, 1, 0);
adc_write_configuration(&ADCA, &adc_conf);
// Configure DAC
dac_read_configuration(&DACA, &dac_conf);
dac_set_conversion_parameters(&dac_conf, DAC_REF_BANDGAP,
DAC_ADJ_RIGHT);
dac_set_active_channel(&dac_conf, DAC_CH0 | DAC_CH1, 0);
dac_set_conversion_trigger(&dac_conf, 0, 0);
dac_set_conversion_interval(&dac_conf, 10);
dac_set_refresh_interval(&dac_conf, 20);
dac_write_configuration(&DACA, &dac_conf);
dac_enable(&DACA);
// Set negative output to zero
dac_wait_for_channel_ready(&DACA, DAC_CH1);
dac_set_channel_value(&DACA, DAC_CH1, DAC_MIN);
for (gain_index = 0; gain_index < sizeof(gain); gain_index++) {
// Set positive output to half positive range adjusted to gain
dac_wait_for_channel_ready(&DACA, DAC_CH0);
dac_set_channel_value(&DACA, DAC_CH0, DAC_MAX /
(gain[gain_index] * 2));
/* Read all ADC pins connected to active DAC output.
* All channels are converted NUM_SAMPLES times and the
* final value used for the assert is an average.
*/
for (adc_channel = 0; adc_channel < NUM_CHANNELS;
adc_channel++) {
differential_signed_average(&ADCA, 1 << adc_channel,
channel_pos, channel_neg, num_inputs,
results, gain[gain_index]);
for (mux_index = 0; mux_index < num_inputs;
mux_index++) {
verify_signed_result(test,
ADC_SIGNED_12BIT_MAX / 2,
results[mux_index],
adc_channel,
channel_pos[mux_index],
channel_neg[mux_index],
ADC_SIGNED_12BIT_MIN,
ADC_SIGNED_12BIT_MAX,
gain[gain_index], true);
}
}
}
}
/**
* \internal
* \brief Test differential conversion in 12-bit mode using the DAC
*
* This tests output three different values on the two DAC channels:
* - 1/2 * \ref DAC_MAX on both outputs to get a differential zero
* - \ref DAC_MAX on positive and \ref DAC_MIN on negative to get max positive
* result
* - \ref DAC_MIN on positive and \ref DAC_MAX on negative to get max negative
* result
*
* These values are then measured using the ADC on the pins that are connected
* to the DAC channel, and the results are compared and checked to see if they
* are within the acceptable range of values that passes the test.
*
* \param test Current test case.
*/
static void run_differential_12bit_conversion_test(
const struct test_case *test)
{
// Number of MUX inputs that are to be read
const uint8_t num_inputs = 4;
/* Connection between DAC outputs and ADC MUX inputs
* input 0, 2, 4, 6 is connected to DACA0
* input 1, 3, 5, 7 is connected to DACA1.
*/
const uint8_t channel_pos[] = {0, 2, 4, 6};
const uint8_t channel_neg[] = {1, 3, 5, 7};
uint8_t adc_channel;
uint8_t mux_index;
int16_t results[4];
struct dac_config dac_conf;
struct adc_config adc_conf;
// Configure ADC
adc_read_configuration(&ADCA, &adc_conf);
adc_set_conversion_parameters(&adc_conf, ADC_SIGN_ON, ADC_RES_12,
ADC_REF_BANDGAP);
adc_set_clock_rate(&adc_conf, 2000UL);
adc_set_conversion_trigger(&adc_conf, ADC_TRIG_MANUAL, 1, 0);
adc_write_configuration(&ADCA, &adc_conf);
// Configure DAC
dac_read_configuration(&DACA, &dac_conf);
dac_set_conversion_parameters(&dac_conf, DAC_REF_BANDGAP,
DAC_ADJ_RIGHT);
dac_set_active_channel(&dac_conf, DAC_CH0 | DAC_CH1, 0);
dac_set_conversion_trigger(&dac_conf, 0, 0);
dac_set_conversion_interval(&dac_conf, 10);
dac_set_refresh_interval(&dac_conf, 20);
dac_write_configuration(&DACA, &dac_conf);
dac_enable(&DACA);
// Set outputs to same (1/2 * MAX_VALUE) to get zero
dac_wait_for_channel_ready(&DACA, DAC_CH0 | DAC_CH1);
dac_set_channel_value(&DACA, DAC_CH0, DAC_MAX / 2);
dac_set_channel_value(&DACA, DAC_CH1, DAC_MAX / 2);
/* Read all ADC pins connected to active DAC output.
* All channels are converted NUM_SAMPLES times and the
* final value used for the assert is an average.
*/
for (adc_channel = 0; adc_channel < NUM_CHANNELS; adc_channel++) {
differential_signed_average(&ADCA, 1 << adc_channel,
channel_pos, channel_neg, num_inputs, results,
1);
for (mux_index = 0; mux_index < num_inputs; mux_index++) {
verify_signed_result(test, ADC_ZERO,
results[mux_index], adc_channel,
channel_pos[mux_index],
channel_neg[mux_index],
ADC_SIGNED_12BIT_MIN,
ADC_SIGNED_12BIT_MAX, 1, true);
}
}
// Set output to max positive range for positive result
dac_wait_for_channel_ready(&DACA, DAC_CH0 | DAC_CH1);
dac_set_channel_value(&DACA, DAC_CH0, DAC_MAX);
dac_set_channel_value(&DACA, DAC_CH1, DAC_MIN);
/* Read all ADC pins connected to active DAC output.
* All channels are converted NUM_SAMPLES times and the
* final value used for the assert is an average.
*/
for (adc_channel = 0; adc_channel < NUM_CHANNELS; adc_channel++) {
differential_signed_average(&ADCA, 1 << adc_channel,
channel_pos, channel_neg, num_inputs, results,
1);
for (mux_index = 0; mux_index < num_inputs; mux_index++) {
verify_signed_result(test, ADC_SIGNED_12BIT_MAX,
results[mux_index], adc_channel,
channel_pos[mux_index],
channel_neg[mux_index],
ADC_SIGNED_12BIT_MIN,
ADC_SIGNED_12BIT_MAX, 1, true);
}
}
// Set output to max negative range for negative result
dac_wait_for_channel_ready(&DACA, DAC_CH0 | DAC_CH1);
dac_set_channel_value(&DACA, DAC_CH0, DAC_MIN);
dac_set_channel_value(&DACA, DAC_CH1, DAC_MAX);
/* Read all ADC pins connected to active DAC output.
* All channels are converted NUM_SAMPLES times and the
* final value used for the assert is an average.
*/
for (adc_channel = 0; adc_channel < NUM_CHANNELS; adc_channel++) {
differential_signed_average(&ADCA, 1 << adc_channel,
channel_pos, channel_neg, num_inputs, results,
1);
for (mux_index = 0; mux_index < num_inputs; mux_index++) {
verify_signed_result(test, ADC_SIGNED_12BIT_MIN,
results[mux_index], adc_channel,
channel_pos[mux_index],
channel_neg[mux_index],
ADC_SIGNED_12BIT_MIN,
ADC_SIGNED_12BIT_MAX, 1, true);
}
}
}
/**
* \internal
* \brief Test single ended conversion in 8-bit mode using the DAC
*
* This tests output three different values on the two DAC channels:
* - 0 (output analog value is greater than 0, as the DAC cannot go that low)
* - 1/2 * \ref DAC_MAX Half of the maximum value of the DAC
* - \ref DAC_MAX The maximum value (VREF) of the DAC.
*
* These values are then measured using the ADC on the pins that are connected
* to the DAC channel, using all available ADC channels and the results are
* compared and checked to see if they are within the acceptable range of
* values that passes the test.
*
* \param test Current test case.
*/
static void run_single_ended_8bit_conversion_test(
const struct test_case *test)
{
// Number of MUX inputs that are to be read
const uint8_t num_inputs = 4;
/* Connection between DAC outputs and ADC MUX inputs
* input 0, 2, 4, 6 is connected to DACA0
* input 1, 3, 5, 7 is connected to DACA1.
*/
const uint8_t channelgroup[2][4] = {{0, 2, 4, 6}, {1, 3, 5, 7}};
uint8_t dac_channel;
uint8_t adc_channel;
uint8_t mux_index;
uint16_t results[4];
struct dac_config dac_conf;
struct adc_config adc_conf;
// Configure ADC
adc_read_configuration(&ADCA, &adc_conf);
adc_set_conversion_parameters(&adc_conf, ADC_SIGN_OFF, ADC_RES_8,
ADC_REF_BANDGAP);
adc_set_clock_rate(&adc_conf, 2000UL);
adc_set_conversion_trigger(&adc_conf, ADC_TRIG_MANUAL, 1, 0);
adc_write_configuration(&ADCA, &adc_conf);
// Configure DAC
dac_read_configuration(&DACA, &dac_conf);
dac_set_conversion_parameters(&dac_conf, DAC_REF_BANDGAP, DAC_ADJ_RIGHT);
dac_set_active_channel(&dac_conf, DAC_CH0 | DAC_CH1, 0);
dac_set_conversion_trigger(&dac_conf, 0, 0);
dac_set_conversion_interval(&dac_conf, 10);
dac_set_refresh_interval(&dac_conf, 20);
dac_write_configuration(&DACA, &dac_conf);
dac_enable(&DACA);
// Set outputs as zero
dac_wait_for_channel_ready(&DACA, DAC_CH0 | DAC_CH1);
dac_set_channel_value(&DACA, DAC_CH0, DAC_MIN);
dac_set_channel_value(&DACA, DAC_CH1, DAC_MIN);
for(dac_channel = 0; dac_channel < 2; dac_channel++) {
/* Read all ADC pins connected to active DAC output.
* All channels are converted NUM_SAMPLES times and the
* final value used for the assert is an average.
*/
for (adc_channel = 0; adc_channel < NUM_CHANNELS;
adc_channel++) {
single_ended_unsigned_average(&ADCA, 1 << adc_channel,
(uint8_t *)&channelgroup[dac_channel],
num_inputs, results);
for (mux_index = 0; mux_index < num_inputs;
mux_index++) {
verify_unsigned_result(test,
ADC_ZERO,
results[mux_index],
dac_channel,
adc_channel,
channelgroup[dac_channel]
[mux_index],
ADC_UNSIGNED_8BIT_MAX, false);
}
}
}
// Set outputs as 1/2 * MAX_VALUE
dac_wait_for_channel_ready(&DACA, DAC_CH0 | DAC_CH1);
dac_set_channel_value(&DACA, DAC_CH0, DAC_MAX / 2);
dac_set_channel_value(&DACA, DAC_CH1, DAC_MAX / 2);
for(dac_channel = 0; dac_channel < 2; dac_channel++) {
/* Read all ADC pins connected to active DAC output.
* All channels are converted NUM_SAMPLES times and the
* final value used for the assert is an average.
*/
for (adc_channel = 0; adc_channel < NUM_CHANNELS;
adc_channel++) {
single_ended_unsigned_average(&ADCA, 1 << adc_channel,
(uint8_t *)&channelgroup[dac_channel],
num_inputs, results);
for (mux_index = 0; mux_index < num_inputs;
mux_index++) {
verify_unsigned_result(test,
ADC_UNSIGNED_8BIT_MAX / 2,
results[mux_index],
dac_channel,
adc_channel,
channelgroup[dac_channel]
[mux_index],
ADC_UNSIGNED_8BIT_MAX, false);
}
}
}
// Set outputs as MAX_VALUE
dac_wait_for_channel_ready(&DACA, DAC_CH0 | DAC_CH1);
dac_set_channel_value(&DACA, DAC_CH0, DAC_MAX);
dac_set_channel_value(&DACA, DAC_CH1, DAC_MAX);
for(dac_channel = 0; dac_channel < 2; dac_channel++) {
/* Read all ADC pins connected to active DAC output.
* All channels are converted NUM_SAMPLES times and the
* final value used for the assert is an average.
*/
for (adc_channel = 0; adc_channel < NUM_CHANNELS;
adc_channel++) {
single_ended_unsigned_average(&ADCA, 1 << adc_channel,
(uint8_t *)&channelgroup[dac_channel],
num_inputs, results);
for (mux_index = 0; mux_index < num_inputs;
mux_index++) {
verify_unsigned_result(test,
ADC_UNSIGNED_8BIT_MAX,
results[mux_index],
dac_channel,
adc_channel,
channelgroup[dac_channel]
[mux_index],
ADC_UNSIGNED_8BIT_MAX, false);
}
}
}
}
/**
* \brief This function initialize the ADCB,gets ADCB-CH0 offset and configure
* ADCB-CH0 for oversampling
* - ADCB-CH0 is configured in 12bit, signed differential mode without gain
* - To read ADC offset, ADCB-Pin3(PB3) used as both +ve and -ve input
* - After reading ADC offset,to start oversampling,ADCB +ve and -ve input
* are configured
*/
void init_adc(void)
{
/* Initialize configuration structures */
adc_read_configuration(&ADCB, &adc_conf);
adcch_read_configuration(&ADCB, ADC_CH0, &adc_ch_conf);
/* Configure the ADCB module:
* - Signed, 12-bit resolution
* - External reference on AREFB pin.
* - 250 KSPS ADC clock rate
* - Manual conversion triggering
* - Callback function
*/
adc_set_conversion_parameters(&adc_conf, ADC_SIGN_ON, ADC_RES_12,
ADC_REF_AREFB);
adc_set_clock_rate(&adc_conf, 250000UL);
adc_set_conversion_trigger(&adc_conf, ADC_TRIG_MANUAL, 1, 0);
adc_write_configuration(&ADCB, &adc_conf);
adc_set_callback(&ADCB, &adc_handler);
/* Configure ADC B channel 0 for offset calculation
* - Differential mode without gain
* - Selected Pin3 (PB3) as +ve and -ve input for offset calculation
*/
adcch_set_input(&adc_ch_conf, ADCCH_POS_PIN3, ADCCH_NEG_PIN3, 1);
adcch_write_configuration(&ADCB, ADC_CH0, &adc_ch_conf);
/* Enable ADCB */
adc_enable(&ADCB);
/* Get ADC offset in to ADC_Offset variable and disable ADC */
adc_offset_one_sample = adc_offset_get_signed();
/* Find ADC_Offset for for total number of samples */
adc_offset = adc_offset_one_sample * ADC_OVER_SAMPLED_NUMBER;
/* Disable ADC to configure for oversampling */
adc_disable(&ADCB);
/* Configure the ADCB module for oversampling:
* - Signed, 12-bit resolution
* - External reference on AREFB pin.
* - 250 KSPS ADC clock rate
* - Free running mode on Channel0 ( First Channel)
*/
adc_set_conversion_trigger(&adc_conf, ADC_TRIG_FREERUN_SWEEP, 1, 0);
adc_write_configuration(&ADCB, &adc_conf);
/* Configure ADC B channel 0 for oversampling input
* - Differential mode without gain
* - Selected Pin1 (PB1) as +ve and Pin2 (PB2) as-ve input
* - Conversion complete interrupt
*/
adcch_set_input(&adc_ch_conf, ADC_OVER_SAMP_POSTIVE_PIN,
ADC_OVER_SAMP_NEGATIVE_PIN, 1);
adcch_set_interrupt_mode(&adc_ch_conf, ADCCH_MODE_COMPLETE);
adcch_enable_interrupt(&adc_ch_conf);
adcch_write_configuration(&ADCB, ADC_CH0, &adc_ch_conf);
/* Enable ADCB */
adc_enable(&ADCB);
}
void ADCA_init(void)
{
struct adc_config adca_conf;
struct adc_channel_config adca_ch_conf;
//
//// Initialize configuration structures.
//adc_read_configuration(&ADCB, &adcb_conf);
//
///* Configure the ADC module:
//* - unsigned, 12-bit results
//* - AREFA voltage reference
//* - 8000 kHz clock rate
//* - FreeRun Mode
//*/
adc_get_calibration_data(ADC_CAL_ADCA);
adc_set_conversion_parameters(&adca_conf,ADC_SIGN_OFF,ADC_RES_12,ADC_REF_AREFA);
adc_set_clock_rate(&adca_conf,125000UL);
adc_set_conversion_trigger(&adca_conf,ADC_TRIG_FREERUN_SWEEP,1,0);
// adc_set_config_compare_value(adcb_conf,KCK_MAX_CHARGE_AMP);
adc_write_configuration(&ADCA,&adca_conf);
//
///* Configure ADC channel 0:
//* - Input: ADCB4
//* - interrupts disable
//*/
adcch_read_configuration(&ADCA,1, &adca_ch_conf);
adcch_set_input(&adca_ch_conf,ADCCH_POS_PIN3,ADCCH_NEG_NONE,ADC_CH_GAIN_1X_gc);
adcch_write_configuration(&ADCA,1,&adca_ch_conf);
///* Configure ADC channel 1: darim az channel 0 estefade mikonim ehtemalan!
//* - Input: ADCB5
//* - Set Interrupt Mode: Below the threshold
//* - interrupts disable
////*/
//adcch_read_configuration(&ADCA,1, &adca_ch_conf);
//adcch_set_input(&adcb_ch_conf,ADCCH_POS_PIN5,ADCCH_NEG_NONE,ADC_CH_GAIN_1X_gc);
////adcch_set_interrupt_mode(&adcb_ch_conf,ADCCH_MODE_ABOVE);
////adcch_enable_interrupt(&adcb_ch_conf);
//adcch_write_configuration(&ADCA,1,&adca_ch_conf);
//
///* Configure ADC channel 2:
//* - Input: ADCB6
//* - interrupts disable
//*/
//adcch_read_configuration(&ADCB,2, &adcb_ch_conf);
//adcch_set_input(&adcb_ch_conf,ADCCH_POS_PIN6,ADCCH_NEG_NONE,ADC_CH_GAIN_1X_gc);
////adcch_disable_interrupt(&adcb_ch_conf);
//adcch_write_configuration(&ADCB,2,&adcb_ch_conf);
////
///* Configure ADC channel 3:
//* - Input: ADCB7
//* - interrupts disable
//*/
//adcch_read_configuration(&ADCB,3, &adcb_ch_conf);
//adcch_set_input(&adcb_ch_conf,ADCCH_POS_PIN7,ADCCH_NEG_NONE,ADC_CH_GAIN_1X_gc);
//adcch_set_interrupt_mode(&adcb_ch_conf,ADCCH_MODE_ABOVE);
//adcch_enable_interrupt(&adcb_ch_conf);
//adcch_write_configuration(&ADCB,3,&adcb_ch_conf);
//
adc_enable(&ADCA);
adc_start_conversion(&ADCA,ADC_CH0);
//adc_start_conversion(&ADCB,ADC_CH1);
//adc_start_conversion(&ADCB,ADC_CH2);
////adc_start_conversion(&ADCB,ADC_CH3);
}