Hi,
I have a question about AM335x USB2.0.
I'm trying execute TESTMODE(Test Packet) in Host mode(I'm using AM335x GP EVM).
But it seem there are no signal from D+ and D-.
Also VBUS are always 0V.
My program is no-OS and not using any SDK from TI.
Maybe initialization of USB are long or missing something.
To execute TESTMODE, which registers need to be setup?
I set the clock module register, control module register of USB and then
followed the sequence of TESTMODE(test packet) which are written in TRM(spruh73p) page.2623.
I attached my source file.
If I'm missing any setup of register, please give me advise.
best regards,
g.f.
/*
* main.c
*/
#define USBSS_SYSCONFIG (volatile unsigned int*)(0x47400010)
#define USB1_CNTRL_Base 0x47401800
#define USB1_MODE (volatile unsigned int*)(USB1_CNTRL_Base + 0xE8)
/*USB1 Core Register*/
#define USB1_Base 0x47401C00
#define USB1_PMR (volatile unsigned char*)(USB1_Base + 0x01)
#define USB1_TESTMODE (volatile unsigned char*)(USB1_Base + 0x0F)
#define USB1_HOSTCSR0 (volatile unsigned short*)(USB1_Base + 0x12)
#define USB1_ENDPOINT0 (volatile unsigned int*)(USB1_Base + 0x20)
#define USB1_DEVCTRL (volatile unsigned char*)(USB1_Base + 0x60)
#define CM_PER_USB0_CLKCTRL (volatile unsigned int*)(0x44E0001C)
#define CM_USB_CTRL1 (volatile unsigned int*)(0x44E10628)
//static volatile unsigned int pageTable[4*1024]__attribute__((aligned(16*1024)));
#define packet_number 53
void usb1_init();
void test_packet_load();
char usb_packet[packet_number] = {
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA,
0xAA, 0xEE, 0xEE, 0xEE, 0xEE, 0xEE, 0xEE, 0xEE,
0xEE, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x7F, 0xBF, 0xDF,
0xEF, 0xF7, 0xFB, 0xFD, 0xFC, 0x7E, 0xBF, 0xDF,
0xEF, 0xF7, 0xFB, 0xFD, 0x7E
};
extern void change_mode(void);
void usb_testmode(){
/* unsigned int index;
for(index = 0; index < (4*1024); index++)
{
if((index >= 0xC00 && index < 0xE00)|| (index == 0x800))
{
pageTable[index] = (index << 20) | 0x00000C1E;
}
else
{
pageTable[index] = (index << 20) | 0x00000C12;
}
}
*/
/*Initialize USB2.0 Controller*/
usb1_init();
*USB1_TESTMODE |= 0x90;
/*Start a Session*/
*USB1_DEVCTRL |= 0x1;
/*Load Test Packet to EndPoint0 FIFO*/
test_packet_load();
/*Enter Test_Packet test mode*/
*USB1_TESTMODE |= 0x08;
/*Set the TxPktRdy bit in the CSR0 register(D1)*/
*USB1_HOSTCSR0 |= 0x2;
}
void test_packet_load(void){
int i;
for(i=0;i<packet_number;i++)
{
*USB1_ENDPOINT0 = usb_packet[i];
}
}
void usb1_init(){
int status = 0;
*(CM_PER_USB0_CLKCTRL) |= 0x2;
/*USB PHY Related Configuration(Control Module Register)*/
// Clear bits 0,1,8,9,23
*(CM_USB_CTRL1) &= ~(0x00800303); // USB_CTRL0
// Set bits 6,7,10,13,14,17,18,19,20
*(CM_USB_CTRL1) |= 0x00186004; // USB_CTRL0
*(USBSS_SYSCONFIG) = 0x1;
while(status==0x1){
status = *(USBSS_SYSCONFIG) & 0x00000001;
}
*(USBSS_SYSCONFIG) = 0x00000014;
*(volatile unsigned int*)0x47401814 |= 0x40000000;
*(USB1_MODE) = 0x00000000;
*USB1_PMR |= 0x30;
}
int main(void) {
// change_mode();
usb_testmode();
while(1);
// return 0;
}
