Sorry, you're using a bunch of code with which I am still unfamiliar.
Your use of usart.tx('S'); should be right, assuming tx() expects
to get a single char (byte) as an argument. My only suggestions are
that usart.tx(); may not block or queue -- if it works like most
TOS interfaces -- so you may be overriding the 'S' with the 'F'.
See if there is an equivalent of sendDone() that you need to wait
for between tx()'s. For testing purposes you should be able to
attach a terminal program to the serial line to see what is being
sent. Also I don't know the CMU cmd set so I don't know if it expects
to get the string's null or just the two cmd chars.
But thanks for pointing out the HplMsp430GeneralIO interface...
I was looking, sort of half-heartedly, for just that recently.
MS
Sikar Chan wrote:
Thanks for your help.
I tried your method today but my CmuCAM3 seems did not receive the
command. Would you please help me to tell me if my program is correct or
not?
For the time being, concurrency is not a problem. I just want to ensure
my command is sent to CmuCAM3 through UART0 TX on Tmote Sky to UART1 of
CmuCAM3
My purpose in this program is to send a "SF" to CmuCAM3.
Thanks
-----------------------------------------------------------------
configuration TestSerialAppC {}
implementation {
components TestSerialC as App, MainC, LedsC;
components new Msp430Usart0C() as usart0;
components HplMsp430GeneralIOC;
App.Boot -> MainC;
App.Leds -> LedsC;
App.usart -> usart0;
App.UsartResource -> usart0;
App.ADC3->HplMsp430GeneralIOC.ADC3;
App.ADC2->HplMsp430GeneralIOC.ADC2;
App.ADC1->HplMsp430GeneralIOC.ADC1;
App.ADC0->HplMsp430GeneralIOC.ADC0;
App.SDA->HplMsp430GeneralIOC.SDA ;
}
-----------------------------------------------------------------
module TestSerialC {
uses {
interface HplMsp430Usart as usart;
interface Boot;
interface Resource as UsartResource;
interface Leds;
interface HplMsp430GeneralIO as ADC3; // SET LOW
interface HplMsp430GeneralIO as ADC2; // SET LOW
interface HplMsp430GeneralIO as ADC1; // SET LOW
interface HplMsp430GeneralIO as ADC0; // SET LOW
interface HplMsp430GeneralIO as SDA; // POWER PIN - SET HIGH
}
}
implementation {
event void Boot.booted() {
// set High to Power On CmuCAM3
call ADC3.set ();
call ADC3.selectIOFunc();
call ADC3.makeOutput();
call ADC2.clr();
call ADC2.selectIOFunc();
call ADC2.makeInput();
call ADC1.clr();
call ADC1.selectIOFunc ();
call ADC1.makeInput();
call ADC0.clr();
call ADC0.selectIOFunc();
call ADC0.makeInput();
call SDA.clr();
call SDA.selectIOFunc();
call SDA.makeInput ();
while (call UsartResource.request() != SUCCESS);
}
event void UsartResource.granted() {
call usart.setModeUart(&msp430_uart_default_config);
call usart.enableUart ();
call usart.tx('S'); // correct?
call usart.tx('F');
call usart.tx(0x00);
while (! call usart.isTxEmpty());
call UsartResource.release();
}
}
}
---------------------------------------------------------------------
On 10/11/07, *Michael Schippling* < [EMAIL PROTECTED]
<mailto:[EMAIL PROTECTED]>> wrote:
You should probably start by learning the C language. This may help:
http://en.wikibooks.org/wiki/C_Programming
But a quick answer goes something like this:
A 'C' string like "gv" is an array of chars (or bytes to most machines)
so it may be declared and initialized thusly:
char string[] = "gv";
You can get to each byte by indexing the array:
char byte1 = string[0];
char byte2 = string[1];
So byte1 one will be 'g' and byte2 will be 'v', where the hex values
of those ASCII chars are 0x67 and 0x76 respectively (assuming I
interpreted the number conversions correctly from this):
http://www.asciitable.com/
The assignment works both ways of course so you can build up
a string like this (note that real C strings are defined to
be terminated with a null (0) character):
char newstring[3];
newstring[0] = 'g';
newstring[1] = 0x76;
newstring[2] = 0x00;
MS
Sikar Chan wrote:
> Hello
>
> I connected a CmuCAM3 to Tmote Sky via the UART0. I want to ask
how to
> convert a string like "gv" to bytes in order to send it to CmuCAM via
> UART0.
>
> Thanks a lot
>
> Regards
> Sikar Chan
>
>
>
------------------------------------------------------------------------
>
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