Hi, I am trying implementing USB firmware to the application. My application generates 20 bytes of information every 10millisecond and transfers to XP Host PC. To try this option, took bulksrc example from demo kit and modified in following way:
* For this example I am using EP8IN
void TD_Init(void) // Called once at startup {
// set the CPU clock to 48MHz
CPUCS = ((CPUCS & ~bmCLKSPD) | bmCLKSPD1) ;
// set the slave FIFO interface to 48MHz
IFCONFIG |= 0x40;
// we are just using the default values, yes this is not necessary...
EP1OUTCFG = 0xA0;
EP1INCFG = 0xA0;
SYNCDELAY; // see TRM section 15.14
EP2CFG = 0xA2;
SYNCDELAY;
EP4CFG = 0xA0;
SYNCDELAY;
EP6CFG = 0xE2;
SYNCDELAY;
EP8CFG = 0xE0;
// out endpoints do not come up armed
// since the defaults are double buffered we must write dummy byte counts twice
SYNCDELAY;
EP2BCL = 0x80; // arm EP2OUT by writing byte count w/skip.
SYNCDELAY;
EP2BCL = 0x80;
SYNCDELAY;
EP4BCL = 0x80; // arm EP4OUT by writing byte count w/skip.
SYNCDELAY;
EP4BCL = 0x80;
// enable dual autopointer feature
AUTOPTRSETUP |= 0x01;
}
void TD_Poll(void) // Called repeatedly while the device is idle
{
static unsigned char txData = 0x41;
for (i=0;i<20;i++)
EP8FIFOBUF = txData;
SYNCDELAY;
EP8BCH = 0x00;
SYNCDELAY;
EP8BCL = 0x04;
txData++;
if(txData >= 0x5A)
txData = 0x41;
}
With this code I am able to simulate code successful under keil environment. After downloading hex file to EZ-USB controller, when I press “BulkTras” for pipe: 3:Endpoint 8 IN following results I will get:
0000 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41
0010 41 41 41 41
Bulk IN Transfer
Bulk IN success.
Buffer Contents
0000 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42 42
0010 42 42 42 42
Bulk IN Transfer
Bulk IN success.
Buffer Contents
0000 41 41 41 41 41 41 41 41 41 41 41 41 4A 4A 4A 4A
0010 4A 4A 4A 4A
Bulk IN Transfer
Bulk IN success.
Buffer Contents
0000 42 42 42 42 58 58 58 58 58 58 58 58 58 58 58 58
0010 58 58 58 58
Bulk IN Transfer
Bulk IN success.
Buffer Contents
0000 41 41 41 41 41 41 41 41 41 41 41 41 4F 4F 4F 4F
0010 4F 4F 4F 4F
Bulk IN Transfer
Bulk IN success.
Buffer Contents
0000 42 42 42 42 58 58 58 58 58 58 58 58 58 58 59 59
0010 59 59 59 59
Bulk IN Transfer
Bulk IN success.
Buffer Contents
0000 41 41 41 41 41 41 41 41 56 56 56 56 56 56 56 56
0010 56 56 56 56
Bulk IN Transfer
Bulk IN success.
Buffer Contents
0000 42 42 42 42 58 58 58 58 58 58 58 58 58 58 58 58
0010 58 58 58 58
Bulk IN Transfer
Bulk IN success.
Buffer Contents
0000 41 41 41 41 41 41 41 41 56 56 56 56 56 56 56 56
0010 56 56 56 58
Bulk IN Transfer
Bulk IN success.
Buffer Contents
0000 42 42 42 42 58 58 58 58 58 58 58 58 58 58 58 58
0010 58 58 58 48
Bulk IN Transfer
Bulk IN success.
Buffer Contents
0000 41 41 41 41 41 41 41 41 56 56 57 57 57 57 57 57
0010 57 57 57 57
Bulk IN Transfer
Bulk IN success.
Buffer Contents
0000 42 42 42 42 58 58 58 58 58 58 58 58 58 58 58 58
0010 58 58 58 50
Bulk IN Transfer
Bulk IN success.
Buffer Contents
0000 41 41 41 41 41 41 41 56 56 56 56 56 56 56 56 56
0010 56 56 56 56
Bulk IN Transfer
Bulk IN success.
Buffer Contents
0000 42 42 42 42 58 58 58 58 58 58 58 49 49 49 49 49
0010 49 49 49 49
As per my code for every “BulkTrans” press, I suppose to get 41, 42, 43, 44, 45, 46, 47…like each byte 20 times.
What’s wrong I am doing at TDPOLL() function?
Appreciate your quick help.
