Bootloader files for CCS-PCWH

[bsb84]

Hi all!

i'm new to this forum and would really appriciate if someone could help me out. I am shfting from PIC16F877A to PIC18F4550 for my project in which i need to transfer data to PC using USB.

When i shifted i was able to program the PIC18F4550 through ICD-U40 and CCS-PCWH compiler, but could'nt get the USB to function. As I am novice in this field, i hear that a bootloader needs to be writen on the PIC and then a driver is needed to be installed for PICs' usb features to work.

So far i have found bootloaders which use MPLAB and ICD2 but i dont have an ICD2 as i am using ICD-U40. When i try to open the Bootloader made for MPLAB in CCS-PCWH compiler i am unable to compile as there are many errors.

Kindly help me out where can i find a bootloader file which i can use in CCS-PCWH and transfer the hex file using ICD-U40.

[rberek]

You do not need a bootloader for the PIC's USB functions to to work.

And you may or may not need a driver depending on what you are trying to do. If you simply want to transfer data to the PC, you can simply use Hyperterminal and use the CDC device class, which is basically a modem transfer. Windows has the drivers for this built right in, and the CCS C code is pretty much the same as what you'd write for an RS232 transfer.

[bsb84]

Yes but i want to recieve data using visual basic so is that possible without loadig any firmware into the PIC.

And i am unable to send any data using the normal USB routines.

are there any header files that i am missing ....

my code in CCS goes like this
----------------------------------------------------------------------------
#include <18F4550.h>
#device ICD=TRUE
#device *=16
#fuses HS,NOWDT,NOPROTECT,NOLVP
#use delay(clock=20000000)

#define USB_HID_DEVICE TRUE
#define USB_RUN_WHEN_CONFIGURED TRUE
#define USB_EP1_TX_ENABLE USB_ENABLE_INTERRUPT
#define USB_EP1_TX_SIZE 2
#define USB_EP1_RX_ENABLE USB_ENABLE_INTERRUPT
#define USB_EP1_RX_SIZE 2

#include <usb_desc_hid.h>
#include <usbn960x.c>
#include <usb.c>


void main()
{
int8 outdata[USB_EP1_TX_SIZE];
int8 indata[USB_EP1_RX_SIZE];

setup_adc(ADC_CLOCK_INTERNAL);
setup_adc_ports(ALL_ANALOG);
usb_init();

delay_ms(1000);

usb_wait_for_enumeration();

while(usb_enumerated())
{
#IF USB_RUN_WHEN_CONFIGURED


set_adc_channel(0); // Acceleration X
delay_us(100);
outdata[0]=read_adc();


set_adc_channel(1); // Acceleration Y
delay_us(100);
outdata[1]=read_adc();

if(usb_put_packet(1,outdata,USB_EP1_TX_SIZE,USB_DTS_TOGGLE))
{
delay_ms(10);
}

#ENDIF
}
}

[rberek]

Let me preface my response by saying that I'm no USB expert, nor do I have any experience with bootloaders, so I may be missing what you are trying to do here. If so, I apologize.