Admin at 19:22, 24 August 2013

2013-08-24T19:22:50Z

Admin at 19:16, 24 August 2013

2013-08-24T19:16:11Z

Admin: Created page with "This section describes tips and tricks received from users. Kyle Kronyak&nbs..."

2013-02-13T10:01:13Z

Created page with "This section describes tips and tricks received from users. Kyle Kronyak&nbs..."

New page

This section describes tips and tricks received from users.

 

 

Kyle Kronyak : Using all the RAM from an external RAM chip.

 

I have found a way to use the 607 bytes of external SRAM that are normally not available when using hardware SRAM support with BASCOM-AVR. It's actually quite simple. Basically the user just has to disconnect A15 from /CE on the SRAM module, and tie /CE to ground. This makes the chip enabled all the time. Addresses 1-32768 will then be available! The reason is because normally when going above 32768, the A15 pin would go high, disabling the chip. When A15 is not connected to /CE, the chip is always enabled, and allows the address number to "roll over". Therefore address 32162 is actually 0, 32163 is actually 1, 32164 is actually 2, etc. I have only tested this on a 32k SRAM chip. It definitely won't work on a 64k chip, and I believe it already works on any chip below 32k without modification of the circuit.

 

 

Programming problems

 

- When you have unreliable results, use a shielded LPT cable

 

- The AVR chips have a bug, if the erase is not complete. It tend's to hang at some point. Sometimes although the system reports erased but blank check report "not empty". As per Atmel Data Errata You must drop the vcc by 0.5V ( a diode 1N4148 in Series ) if the erase is not happening. ( Such Chip's are unreliable and hence can be used only if you are sure ). This can happen after you have programmed the chip many times.

 {{Languages}}

[[Category:BASCOM Language Fundamentals]]

@@ Line 43: / Line 43: @@
 <span style="font-size: 8pt; font-family: Courier; color: rgb(0, 128, 0);">&nbsp;</span>
-<span class="f_Header">5. To split a word into High byte and Low byte</span>&nbsp;you can also use&nbsp;[[HIGH]]&nbsp;and&nbsp;[[LOW]]
+<span class="f_Header">5. To split a word into High byte and Low byte</span>&nbsp;you can also use&nbsp;&lt;a _fcknotitle="true" href="HIGH"&gt;HIGH&lt;/a&gt;&nbsp;and&nbsp;&lt;a _fcknotitle="true" href="LOW"&gt;LOW&lt;/a&gt;
 &nbsp;
@@ Line 91: / Line 91: @@
 &nbsp;
-The utility has been updated and now will retrieve all info from the source file, but only when your main program contains these directive :
+The utility has been updated and now will retrieve all info from the source file, but only when your main program contains these directive&nbsp;:
 $regfile, $hwstack, $swstack, $framesize
@@ Line 97: / Line 97: @@
 &nbsp;
-<span style="font-weight: bold;">Example :</span>
+<span style="font-weight: bold;">Example&nbsp;:</span>
 bascomp.exe "c:\my folder\source\sample.bas" auto
@@ Line 109: / Line 109: @@
 <span class="f_Header">9. You can use $initmicro if you want to run special tasks at startup:</span>
-See&nbsp;[[$INITMICRO]]
+See&nbsp;&lt;a _fcknotitle="true" href="%24INITMICRO"&gt;$INITMICRO&lt;/a&gt;
 &nbsp;
-<span class="f_Header">10. You can use $include&nbsp;</span><span class="f_Header">to make larger projects better readable</span>: See&nbsp;<span style="font-size: 12pt; font-family: 'Times New Roman';">[[$INCLUDE]]</span>
+<span class="f_Header">10. You can use $include&nbsp;</span><span class="f_Header">to make larger projects better readable</span>: See&nbsp;<span style="font-size: 12pt; font-family: 'Times New Roman';">&lt;a _fcknotitle="true" href="%24INCLUDE"&gt;$INCLUDE&lt;/a&gt;</span>
 &nbsp;
@@ Line 123: / Line 123: @@
 a. Check fuse bit settings
-b. Are the AVR pins are OK ?
+b. Are the AVR pins are OK&nbsp;?
 &nbsp;
@@ Line 155: / Line 155: @@
 <span class="f_Header">12. With the Lib Manager you can compile a Library (*.lib) into an *.lbx file.</span>
-See here:&nbsp;[[Tools_LIB_Manager|Tools LIB Manager]]
+See here:&nbsp;&lt;a href="Tools%20LIB%20Manager"&gt;Tools LIB Manager&lt;/a&gt;
 &nbsp;
@@ Line 163: / Line 163: @@
 <span class="f_Header">13. There is a timeout function for hardware and software UART</span>
-See&nbsp;[[$TIMEOUT]]
+See&nbsp;&lt;a _fcknotitle="true" href="%24TIMEOUT"&gt;$TIMEOUT&lt;/a&gt;
 &nbsp;
@@ Line 171: / Line 171: @@
 <span class="f_Header">14. How to use the Powerdown function:</span>
-See also:&nbsp;[[CONFIG_POWERMODE|CONFIG POWERMODE]]
+See also:&nbsp;&lt;a href="CONFIG%20POWERMODE"&gt;CONFIG POWERMODE&lt;/a&gt;
 <span style="font-size: 8pt; font-family: Courier;">&nbsp;</span>
@@ Line 181: / Line 181: @@
 &nbsp;
-Examples for 3.3Volt Low Quiescent Current LDO Regulator :
+Examples for 3.3Volt Low Quiescent Current LDO Regulator&nbsp;:
 <div style="padding: 0px; margin: 0px 0px 0px 24px;">
 {| border="0" cellpadding="0" cellspacing="0"
@@ Line 216: / Line 216: @@
 &nbsp; &nbsp; &nbsp; &nbsp;<span style="font-family: 'Courier New'; color: rgb(0, 128, 0);">' on Portb.1 which is the PowerDown wake-up</span><br/><span style="font-family: 'Courier New'; font-weight: bold; color: rgb(0, 0, 128);">Loop</span><br/><span style="font-family: 'Courier New'; color: rgb(0, 128, 0);">'###############################################################################</span><br/><span style="font-family: 'Courier New'; font-weight: bold; color: rgb(0, 0, 128);">End</span><br/><span style="font-family: 'Courier New';">&nbsp;</span><br/><span style="font-family: 'Courier New';">Int0_isr</span><span style="font-family: 'Courier New'; color: rgb(255, 0, 0);">:</span><br/><span style="font-family: 'Courier New'; color: rgb(0, 128, 0);">' wake_up</span><br/><span style="font-family: 'Courier New'; font-weight: bold; color: rgb(0, 0, 128);">Return</span>

Tips and tricks - Revision history

Admin at 19:22, 24 August 2013

Admin at 19:16, 24 August 2013

Admin: Created page with "This section describes tips and tricks received from users. Kyle Kronyak&nbs..."