40.6.15 Test Mode

A device must support the TEST_MODE feature when in the Default, Address or Configured High Speed device states.

TEST_MODE can be:

• Test_J
• Test_K
• Test_Packet
• Test_SEO_NAK

(See UDPHS Test Register for definitions of each test mode.)

const char test_packet_buffer[] = {
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,                // JKJKJKJK * 9 
0xAA,0xAA,0xAA,0xAA,0xAA,0xAA,0xAA,0xAA,                     // JJKKJJKK * 8 
0xEE,0xEE,0xEE,0xEE,0xEE,0xEE,0xEE,0xEE,                     // JJKKJJKK * 8 
0xFE,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF, // JJJJJJJKKKKKKK * 8 
0x7F,0xBF,0xDF,0xEF,0xF7,0xFB,0xFD,                          // JJJJJJJK * 8 
0xFC,0x7E,0xBF,0xDF,0xEF,0xF7,0xFB,0xFD,0x7E                 // {JKKKKKKK * 10}, JK
};