Need USB help , pcm 3.150, pic16c745

[chriss2000]

hi there !
i've problems with the new pcm compiler 3.150 which provides the usb for pic16c7x5.

there is one example program in the picc folder for an hid device "ex_usb_hid.c", i haven't found the example "ex_usb.h" which is listed on the homepage and in the description of usb.
i tried to program the pic but after connecting my hardware with the pc there was the error message "unknown usb feature, probably not functionally"
i think there must be something wrong with the descriptors, they aren't includet in the program !!

here is the program i tried !!
can anyone help me ??? please
thx a lot


#define USB_PIC16C745 1 //set to 1 to use a PIC16c745 USB Peripheral
//set to 0 to use a National USBN960x peripheral

#if USB_PIC16C745 //use the PIC16C7x5 peripheral
#include <16C745.h>
#device *=16
#fuses HS,NOWDT,NOPROTECT
#use delay(clock=24000000)

#else //use the National USBN960x peripheral
#if defined(__PCM__)
#include <16F877.h>
#device *=16
#fuses HS,NOWDT,NOPROTECT,NOLVP
#elif defined(__PCH__)
#include <18F452.h>
#fuses HS,NOPROTECT,NOLVP,NOWDT
#endif
#use delay(clock=20000000)

#endif //endif check to see which peripheral to use

#use rs232(baud=9600, xmit=PIN_C6, rcv=PIN_C7)

#DEFINE LED_1 PIN_B5
#DEFINE LED_2 PIN_B4
#DEFINE LED_3 PIN_B3
#DEFINE BUTTON PIN_A4

//Tells the CCS PIC USB firmware to include HID handling code.
#DEFINE USB_HID_DEVICE TRUE

//Set this to FALSE if you only want to test enumeration. Some USB test programs,
//such as USBCHECK, crash if you are trying to test enumeration and the device
//starts sending data once configured.
#DEFINE USB_RUN_WHEN_CONFIGURED TRUE

//the following defines needed for the CCS USB PIC driver to enable the TX endpoint 1
#define USB_EP1_TX_ENABLE 1 //turn on EP1 for IN bulk/interrupt transfers
#define USB_EP1_TX_SIZE 2 //if you change this, be sure to change the hid descriptor

//the following defines needed for the CCS USB PIC driver to enable the RX endpoint 1
#define USB_EP1_RX_ENABLE 1 //turn on EP1 for OUT bulk/interrupt transfers
#define USB_EP1_RX_SIZE 2 //if you change this, be sure to change the hid descriptor

#if USB_PIC16C745
#include <pic_usb.h> //Microchip PIC16C745 hardware layer for usb.c
#else
#include <usbn960x.c> //National 960x hardware layer for usb.c
#endif

#include <usb.c> //handles usb setup tokens and get descriptor reports

void main() {
int8 out_data[USB_EP1_TX_SIZE];
int8 in_data[USB_EP1_RX_SIZE];

#ifdef __PCH__
printf("\r\n\r\nPCH: v");
printf(__PCH__);
#else
printf("\r\n\r\nPCM: v");
printf(__PCM__);
#endif

setup_adc(ADC_CLOCK_INTERNAL);
setup_adc_ports(RA0_RA1_RA3_ANALOG);
set_adc_channel(1);

usb_init();

#if !(USB_PIC16C745)
printf("\r\nUSBN: 0x\%X\r\n", usbn_get_version());
output_low(LED_1);
output_low(LED_2);
output_low(LED_3);
delay_ms(1000);
output_high(LED_1);
output_high(LED_2);
#else
printf("\r\n");
#ENDIF


printf("\r\n\r\nWaiting for enumeration...");

while (TRUE) {
usb_wait_for_enumeration();
printf("\r\n\r\n***Enumerated***\r\n");
while(usb_enumerated()) {
#IF USB_RUN_WHEN_CONFIGURED
if (usb_kbhit(1)) {
usb_gets(1, in_data, USB_EP1_RX_SIZE);
printf("\r\n--> Received 2 bytes: 0x\%X 0x\%X",in_data[0],in_data[1]);
if (in_data[0]) {output_low(LED_1);} else {output_high(LED_1);}
if (in_data[1]) {output_low(LED_2);} else {output_high(LED_2);}
}
out_data[0]=read_adc();
out_data[1]=!input(BUTTON);
if (usb_put_packet(1, out_data, USB_EP1_TX_SIZE, TOGGLE)) {
printf("\r\n<-- Sending 2 bytes: 0x\%X 0x\%X", out_data[0], out_data[1]);
}
delay_ms(500);
#ENDIF
}
printf("\r\n\r\nDevice Un-configured.r\n");
}
}
___________________________
This message was ported from CCS's old forum
Original Post ID: 13500

[Andy Drummond]

Hi there. I don't know if this is helpful, but I wanted to use USB with a PIC a while back and failed dismally to work out what to do. I found that FTDI (Future Technology Devices Inc ?) make two parts, the FT245BM and the FT232??. Little 32-pin LQFP part, very low cost. The -245 is an 8-bit FIFO with RxF, TxE, Wr and Rd lines, the -232 is a full RS232 I/O part (except for voltage levels). And FTDI supply (free) all the PC software, drivers, examples, etc. It made my life so much easier that I am now a converted FTDI enthusiast. When I put my PCB together with this part it was all running the same day; so easy.

So if that is useful, you're welcome.
___________________________
This message was ported from CCS's old forum
Original Post ID: 13538

[diego_huelva@hotmail.com]

HI Andy Drummond! These code that you post is a modification of "ex_usb_hid.c" example. ¿? I have you same problem! With the PIC16C765, it works well, but not with the PIC16C745. If you find the solution, write me to diego_huelva@hotmail.com, please!!! Sorry for my english, I am spanish.

[hillcraft]

I use the 745 USB with great success. The best way to get going is to make a HID device like a mouse or a joystick. The reason for this is that Windows will automatically build the device driver for you. You must also do a hell of a lot of readind about the manner in which USB endpoints are defined and how enumeration is done.

There is no great difference betwen the 745 and the 765. I would love to know why Microchip does not provide a Flash USB chip.

[diego_huelva]

Hi hillcraft!
Can you post a code example that works with 16C745? Please!!!