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joven
Joined: 30 Jan 2007 Posts: 56 Location: Viana do Castelo - Portugal
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USB to USART |
Posted: Tue Nov 13, 2007 5:05 pm |
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Hi
I'm trying use the ex_usb_serial.c but isn't working.
someone have successfully put working?
in my program i'm using the usb bootloader to try more fast the changes.
Code: |
#include <18F2550.h>
#fuses HSPLL,NOWDT,NOPROTECT,NOLVP,NODEBUG,USBDIV,PLL5,CPUDIV1,VREGEN,NOPBADEN,WRTB,MCLR,NOCPD,NOWRTC
#use delay(clock=48000000)
// START OF bootloader definition
#define LOADER_END 0x7FF
#define LOADER_SIZE 0x6FF
#build(reset=LOADER_END+1, interrupt=LOADER_END+9)
#org 0, LOADER_END {} // nothing will replace the bootloader memory space
// END OF bootloader definition
#use rs232(baud=9600,parity=N,xmit=PIN_C6,rcv=PIN_C7,bits=8)
#include <usb_cdc.h>
// Configure the demonstration I/O
#DEFINE LED1 PIN_B7
#define LED2 PIN_B6
#define LED3 PIN_B5
#DEFINE BUTTON PIN_B4
#define LED_ON output_low
#define LED_OFF output_high
/////////////////////////////////////////////////////////////////////////////
//
// usb_debug_task()
//
// When called periodically, displays debugging information over serial
// to display enumeration and connection states. Also lights LED1 based upon
// enumeration and status.
//
/////////////////////////////////////////////////////////////////////////////
void usb_debug_task(void) {
static int8 last_connected;
static int8 last_enumerated;
int8 new_connected;
int8 new_enumerated;
static int8 last_cdc;
int8 new_cdc;
new_connected=usb_attached();
new_enumerated=usb_enumerated();
new_cdc=usb_cdc_connected();
if (new_enumerated)
LED_ON(LED1);
else
LED_OFF(LED1);
if (new_cdc)
LED_ON(LED2);
else
LED_OFF(LED2);
if (usb_cdc_carrier.dte_present)
LED_ON(LED3);
else
LED_OFF(LED3);
if (new_connected && !last_connected)
printf("USB connected, waiting for enumaration...\r\n\n");
if (!new_connected && last_connected)
printf("USB disconnected, waiting for connection...\r\n\n");
if (new_enumerated && !last_enumerated)
printf("USB enumerated by PC/HOST\r\n\n");
if (!new_enumerated && last_enumerated)
printf("USB unenumerated by PC/HOST, waiting for enumeration...\r\n\n");
if (new_cdc && !last_cdc) {
printf("Serial program initiated on USB<->UART COM Port\r\n\n");
printf(usb_cdc_putc, "\r\n\nCCS CDC (Virtual RS232) Example\r\n\n");
}
last_connected=new_connected;
last_enumerated=new_enumerated;
last_cdc=new_cdc;
}
void main(void) {
char c;
LED_OFF(LED1);
LED_OFF(LED2);
LED_OFF(LED3);
printf("\r\n\nCCS CDC (Virtual RS232) Example\r\n");
#ifdef __PCH__
printf("PCH: v");
printf(__PCH__);
#endif
printf("\r\n");
usb_init_cs();
while (TRUE)
{
usb_task();
usb_debug_task();
if (kbhit())
{
c=getc();
if (c=='\n') {usb_cdc_putc('\r'); usb_cdc_putc('\n');}
if (c=='\r') {usb_cdc_putc('\r'); usb_cdc_putc('\n');}
else {usb_cdc_putc(c);}
}
if (usb_cdc_kbhit())
{
c=usb_cdc_getc();
if (c=='\n') {putc('\r'); putc('\n');}
if (c=='\r') {putc('\r'); putc('\n');}
else {putc(c);}
}
}
}
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Someone can give-me a tip for put working?
thanks |
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meereck
Joined: 09 Nov 2006 Posts: 173
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Posted: Wed Nov 14, 2007 7:24 am |
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As I can see, you use the USB bootloader.
What is the crystal you have on your board? It looks like 20Mhz.
Is the device enumerated? |
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joven
Joined: 30 Jan 2007 Posts: 56 Location: Viana do Castelo - Portugal
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Posted: Wed Nov 14, 2007 2:45 pm |
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hi
what you mean device enumerated?
i think include the "#define __USB_PIC_PERIF__ 1" |
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meereck
Joined: 09 Nov 2006 Posts: 173
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Posted: Wed Nov 14, 2007 3:43 pm |
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I mean what happens when the PIC gets connected to a PC? Any message from the PC?
"
//set to 1 to use a PIC's internal USB Peripheral
//set to 0 to use a National USBN960x peripheral
#define __USB_PIC_PERIF__ 1
"
In the case you use a PIC with USB controller integrated, set it to 1.
Do you have a cap about 470nF on Vusb pin of the PIC? |
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