Author: sebastien.lelong
Date: Thu Jun 25 10:43:15 2009
New Revision: 1040
Modified:
trunk/sample/16f88_adc_lowres.jal
Log:
adc low resolution sample, showing set_analog_pin() usage. Loop over all
channels
Modified: trunk/sample/16f88_adc_lowres.jal
==============================================================================
--- trunk/sample/16f88_adc_lowres.jal (original)
+++ trunk/sample/16f88_adc_lowres.jal Thu Jun 25 10:43:15 2009
@@ -1,22 +1,22 @@
-- Title: Sample showing how to use adc_hardware library
--- Author: Sebastien Lelong, Copyright (c) 2008, all rights reserved.
+-- Author: Sebastien Lelong, Copyright (c) 2008-2009, all rights reserved.
-- Adapted-by:
--- Compiler: >=2.4g
+-- Compiler: >=2.4k
--
-- This file is part of jallib (http://jallib.googlecode.com)
-- Released under the BSD license
(http://www.opensource.org/licenses/bsd-license.php)
--
-- Description: this program shows how to use adc_hardware library. It
regurlarly performs an
--- Analog-to-Digital Conversion, on channel AN0 (for 16f88, it's pin A0),
and sends
--- the result through serial.
+-- Analog-to-Digital Conversion, on channels AN0 to AN6 (see pin diagrams
to know which pins are involved),
+-- and sends the result through serial.
--
-- Notes: as output, this sample produces characters on a serial link, and
uses delay library.
-- First be sure you're able to run serial and delay tests.
--
--
--- Few words about diagram: this program performs ADC on channel AN0, so
you can
--- any voltage source connected to AN0 (no more 5V please). To test the
whole, you can
--- use a voltage divider:
+-- Few words about diagram: this program performs ADC on channels AN0 to
AN6, so you can measure
+-- any voltage source connected to these channels (no more than 5V
please). To test the whole, you can
+-- use a voltage divider. For AN0:
--
-- 5V
-- |
@@ -72,19 +72,33 @@
include adc
-- And initialize the whole with our parameters
adc_init()
--- We just need only one ADC channel
-set_analog_pin(0) -- make RA0/AN0 analog
+-- Declare analog channels
+set_analog_pin(0)
+set_analog_pin(1)
+set_analog_pin(2)
+set_analog_pin(3)
+set_analog_pin(4)
+set_analog_pin(5)
+set_analog_pin(6)
-- will periodically send those chars
var byte measure
+const byte prefix[] = "Channel "
forever loop
- -- get ADC result, on channel 0
- measure = adc_read_low_res(0)
- -- send it back through serial
- print_byte_dec(serial_hw_data,measure)
- print_crlf(serial_hw_data)
- -- and sleep a litte...
- delay_1ms(200)
+ var byte channel = 0
+ -- loop over all channels and read
+ for 7 using channel loop
+ -- get ADC result
+ measure = adc_read_low_res(channel)
+ -- send it back through serial
+ print_string(serial_hw_data,prefix)
+ print_byte_dec(serial_hw_data,channel)
+ serial_hw_write(":")
+ print_byte_dec(serial_hw_data,measure)
+ print_crlf(serial_hw_data)
+ -- and sleep a litte...
+ delay_1ms(200)
+ end loop
end loop
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