fix for continuous read mode

added delays
updated data_mode setup
removed ac rejection functionality

Author: Silver Kuusik

AD7173.cpp

@@ -12,20 +12,26 @@ void AD7173Class::init() {
 	SPI.begin();
 	/* use SPI mode 3 */
 	SPI.setDataMode(SPI_MODE3);
+	/* allow the LDOs to power up */
+	delay(10);
 }
 
 void AD7173Class::reset() {
 	/* sending at least 64 high bits returns ADC to default state */
 	for (int i = 0; i < 8; i++) {
 		SPI.transfer(0xFF);
 	}
+	/* allow the LDOs to power up */
+	delay(10);
 }
 
 void AD7173Class::sync() {
 	/* toggle the chip select */
 	digitalWrite(SS, HIGH);
 	delay(10);
 	digitalWrite(SS, LOW);
+	/* allow the LDOs to power up */
+	delay(10);
 }
 
 void AD7173Class::print_byte(byte value) {
@@ -96,13 +102,13 @@ int AD7173Class::get_current_data_channel(register_t &channel) {
 	return 0;
 }
 
-int AD7173Class::set_adc_mode_config(clock_mode_t clock_mode) {
+int AD7173Class::set_adc_mode_config(data_mode_t data_mode, clock_mode_t clock_mode) {
 	/* Address: 0x01, Reset: 0x2000, Name: ADCMODE */
 
 	/* prepare the configuration value */
 	/* REF_EN [15], RESERVED [14], SING_CYC [13], RESERVED [12:11], DELAY [10:8], RESERVED [7], MODE [6:4], CLOCKSEL [3:2], RESERED [1:0] */
 	byte value[2] = {0x00, 0x00};
-	value[1] = (clock_mode << 2);
+	value[1] = (data_mode << 4) | (clock_mode << 2);
 
 	/* update the desired adc_mode configuration */
 	this->set_register(ADCMODE_REG, value, 2);
@@ -229,13 +235,12 @@ int AD7173Class::set_setup_config(register_t setup, coding_mode_t coding_mode) {
 	return 0;
 }
 
-int AD7173Class::set_filter_config(register_t filter, bool ac_rejection, data_rate_t data_rate) {
+int AD7173Class::set_filter_config(register_t filter, data_rate_t data_rate) {
 	/* Address Range: 0x28 to 0x2F, Reset: 0x0000, Name: FILTCON0 to FILTCON7 */
 
 	/* prepare the configuration value */
 	byte value[2] = {0x00, 0x00};
 	/* SINC3_MAP0 [15], RESERVED [14:12], ENHFILTEN0 [11], ENHFILT0 [10:8], RESERVED [7], ORDER0 [6:5], ORD0 [4:0] */
-	value[0] = (ac_rejection << 3);
 	value[1] = data_rate;
 
 	/* update the desired filter configuration */

AD7173.h

@@ -251,7 +251,7 @@ class AD7173Class {
 	@return int - error code
 	================================
 	*/
-	int set_adc_mode_config(clock_mode_t);
+	int set_adc_mode_config(data_mode_t, clock_mode_t);
 
 	/*
 	==================================================
@@ -305,12 +305,11 @@ class AD7173Class {
 	==========================================
 	sets the ADC filters data conversion rate
 	@param byte - filter register
-	@param bool - enable/disable ac_rejection
 	@param byte - data rate
 	@return int - error code
 	==========================================
 	*/
-	int set_filter_config(register_t, bool, data_rate_t);
+	int set_filter_config(register_t, data_rate_t);
 
 private:
 	/* ADC data mode */

examples/Basic/Basic.ino

@@ -42,14 +42,20 @@ void setup() {
 
 	/* set the ADC FILTER0 ac_rejection to false and samplingrate to 1007 Hz */
 	/* FILTER0 - FILTER7 */
-	/* true/false to enable/disable 50/60 Hz AC rejection filters */
 	/* SPS_1, SPS_2, SPS_5, SPS_10, SPS_16, SPS_20, SPS_49, SPS_59, SPS_100, SPS_200 */
 	/* SPS_381, SPS_503, SPS_1007, SPS_2597, SPS_5208, SPS_10417, SPS_15625, SPS_31250 */
-	AD7173.set_filter_config(FILTER0, false, SPS_1007);
+	AD7173.set_filter_config(FILTER0, SPS_1007);
 
 	/* set the ADC data and clock mode */
+	/* CONTINUOUS_CONVERSION_MODE, SINGLE_CONVERSION_MODE */
+	/* in SINGLE_CONVERSION_MODE after all setup channels are sampled the ADC goes into STANDBY_MODE */
+	/* to exit STANDBY_MODE use this same function to go into CONTINUOUS or SINGLE_CONVERSION_MODE */
 	/* INTERNAL_CLOCK, INTERNAL_CLOCK_OUTPUT, EXTERNAL_CLOCK_INPUT, EXTERNAL_CRYSTAL */
-	AD7173.set_adc_mode_config(INTERNAL_CLOCK);
+	AD7173.set_adc_mode_config(CONTINUOUS_CONVERSION_MODE, INTERNAL_CLOCK);
+
+	/* enable or disable CONTINUOUS_READ_MODE, to exit use AD7173.reset(); */
+	/* AD7173.reset(); return all registers to default state, so everything has to be setup again */
+	AD7173.set_interface_mode_config(false);
 
 	/* wait for ADC */
 	delay(10);

library.properties

@@ -1,9 +1,9 @@
 name=AD7173
-version=0.2
+version=0.2.1
 author=Silver Kuusik <[email protected]>
 maintainer=Silver Kuusik <[email protected]>
 sentence=Arduino library for Analog Devices AD7173 analog digital converter
 paragraph=This library was developed as the 24bit interface for Brain-Duino. It implements basic functionality of the AD7173 for using it with Brain-Duino or other purposes.
 category=Communication
 url=https://github.com/brain-duino/AD7173-Arduino
-architectures=avr
+architectures=avr