Analog inputs - Revision history

Cartridge1987: /* adding and averaging */

2015-12-09T13:12:57Z

adding and averaging

Cartridge1987: /* analog inputs */

2015-11-05T15:42:11Z

analog inputs

Rew: /* normal measurements */

2013-04-19T07:40:38Z

normal measurements

Rew: /* normal measurements */

2013-04-19T07:40:26Z

normal measurements

Rew: /* Differential measurements */

2013-01-07T11:08:42Z

Differential measurements

Rew: /* Differential measurements */

2013-01-07T11:05:57Z

Differential measurements

Rew: /* Differential measurements */

2013-01-07T11:01:42Z

Differential measurements

Rew at 10:58, 7 January 2013

2013-01-07T10:58:05Z

Rew: /* Differential measurements */

2012-12-25T13:07:04Z

Differential measurements

Rew: /* Differential measurements */

2012-12-25T13:05:56Z

Differential measurements

@@ Line 131: / Line 131: @@
 Add one to the values in the above table to obtain the x20 measurements.
-= adding and averaging =
+= Adding and averaging =
 By setting a value into the <samples-to-add> register (0x81), you can add samples together. By setting a value in the <number-of-bits-to-shift-the-result> register (0x82) you can divide down (but only by powers of two) to get an average.

@@ Line 1: / Line 1: @@
-= analog inputs =
+= Analog inputs =
 Several boards can be configured to use analog inputs. The registers 0x70-0x78 specify the value for the multiplexer register in the ADC module of the used chip. The value is not santiy checked. Any value you specify will be used. It is not expected that things will break if you send a value that is not documented here, but why risk it?
-== reference ==
+== Reference ==
 The top two bits specify the reference. Possible values are:
@@ Line 12: / Line 12: @@
 Other values are not applicable (0x40 = use aref pin, which is connected elsewhere on the bitwizard boards, 0xc0 is "reserved").
-== normal measurements ==
+== Normal measurements ==
 Normal measurements would return a value of 0 for 0V up to 1023 for the reference value.

← Older revision		Revision as of 07:40, 19 April 2013
Line 32:		Line 32:


	The values 4, 5 and 7 would measure analog values on the pins required for I2C or SPI communication. Interesting to do once, but not particularly useful. These values are added to the "reference selection" value in the previous section.		The values 4, 5 and 6 would measure analog values on the pins required for I2C or SPI communication. Interesting to do once, but not particularly useful. These values are added to the "reference selection" value in the previous section.

	There are also some special values internal to the chip:		There are also some special values internal to the chip:

← Older revision		Revision as of 07:40, 19 April 2013
Line 32:		Line 32:


	The values 4, 5 and 6 would measure analog values on the pins required for I2C or SPI communication. Interesting to do once, but not particularly useful. These values are added to the "reference selection" value in the previous section.		The values 4, 5 and 7 would measure analog values on the pins required for I2C or SPI communication. Interesting to do once, but not particularly useful. These values are added to the "reference selection" value in the previous section.

	There are also some special values internal to the chip:		There are also some special values internal to the chip:

@@ Line 111: / Line 111: @@
 |-
-| DIO1<br>S4 T1 || 0x2a || 0x1e || 0x30 || 0x24 || 0x18
+| DIO1<br>S4 T1 || 0x2a || 0x2e || 0x30 || 0x24 || 0x18
 |-

@@ Line 105: / Line 105: @@
 |-
-| DIO4<br>S1 T3 || 0x18 || - || 0x0c || 0x0e || -
+| DIO4<br>S1 T3 || 0x28 || - || 0x0c || 0x0e || -
 |-

@@ Line 100: / Line 100: @@
 {| border=1
-!  !! dio6 <br> S2 <br> T4 !! DIO4 <br> S1<br>T3  || DIO 3 <br> S3<br>T2 || DIO 1 <br>S4<br>T1 || DIO 0
+!  !! DIO6 <br> S2 <br> T4 !! DIO4 <br> S1<br>T3  || DIO 3 <br> S3<br>T2 || DIO 1 <br>S4<br>T1 || DIO 0
 |-
 | DIO6<br> S2 T4 || 0x22* || 0x08 || - || 0x0a || -

@@ Line 62: / Line 62: @@
 ! value !! dio pins !! temp  || thermo
 |-
-| 0x08  || 6 - 4 || S2 - S1 || -
+| 0x08  || 6 - 4 || S2 - S1 || T4 - T3 *
 |-
-| 0x0a  || 6 - 1 || S2 - S4 || -
+| 0x0a  || 6 - 1 || S2 - S4 || T4 - T1
 |-
-| 0x28  || 4 - 6 || S1 - S2 || -
+| 0x28  || 4 - 6 || S1 - S2 || T3 - T4 *
 |-
-| 0x0c  || 4 - 3 || S1 - S3 || -
+| 0x0c  || 4 - 3 || S1 - S3 || T3 - T2
 |-
-| 0x0e  || 4 - 1 || S1 - S4 || -
+| 0x0e  || 4 - 1 || S1 - S4 || T3 - T1
 |-
-| 0x2c  || 3 - 4 || S3 - S1 || -
+| 0x2c  || 3 - 4 || S3 - S1 || T2 - T3
 |-
-| 0x10  || 3 - 1 || S3 - S4 || -
+| 0x10  || 3 - 1 || S3 - S4 || T2 - T1 *
 |-
-| 0x2a  || 1 - 6 || S4 - S2 || -
+| 0x2a  || 1 - 6 || S4 - S2 || T1 - T4
 |-
-| 0x2e  || 1 - 4 || S4 - S1 || -
+| 0x2e  || 1 - 4 || S4 - S1 || T1 - T3
 |-
-| 0x30  || 1 - 3 || S4 - S3 || -
+| 0x30  || 1 - 3 || S4 - S3 || T1 - T2 *
 |-
-| 0x24  || 1 - 1 || S4 - S4 || -
+| 0x24  || 1 - 1 || S4 - S4 || T1 - T1
 |-
 | 0x18  || 1 - 0 || - || -
@@ Line 94: / Line 94: @@
 | 0x26  || 0 - 0 || - || -
 |}
+Thermo lines marked with the asterisk are the intended use for the thermocouple board.
 Hmm. Maybe a different table is more useful / easier to read in our application. Let me try this:
 {| border=1
-!  !! dio6 <br> S2 !! DIO4 <br> S1  || DIO 3 <br> S3 || DIO 1 <br>S4 || DIO 0
+!  !! dio6 <br> S2 <br> T4 !! DIO4 <br> S1<br>T3  || DIO 3 <br> S3<br>T2 || DIO 1 <br>S4<br>T1 || DIO 0
 |-
-| DIO6<br> S2 || 0x22* || 0x08 || - || 0x0a || -
+| DIO6<br> S2 T4 || 0x22* || 0x08 || - || 0x0a || -
 |-
-| DIO4<br>S1 || 0x18 || - || 0x0c || 0x0e || -
+| DIO4<br>S1 T3 || 0x18 || - || 0x0c || 0x0e || -
 |-
-| DIO3<br>S3 || -  || 0x2c || - || 0x10 || -
+| DIO3<br>S3 T2 || -  || 0x2c || - || 0x10 || -
 |-
-| DIO1<br>S4 || 0x1a || 0x1e || 0x30 || 0x24 || 0x18
+| DIO1<br>S4 T1 || 0x1a || 0x1e || 0x30 || 0x24 || 0x18
 |-