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Read a descriptor (not yet working)

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This commit is contained in:
PaulStoffregen 2016-07-30 18:55:57 -07:00
parent 1cab5f2dc8
commit d064762d7c
1 changed files with 72 additions and 13 deletions
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85
k66_usbhost.ino
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@ -2,10 +2,13 @@
uint32_t periodictable[64] __attribute__ ((aligned(4096), used));
uint32_t qh[12] __attribute__ ((aligned(64)));
volatile uint32_t qh[12] __attribute__ ((aligned(64)));
uint32_t qtd_dummy[8] __attribute__ ((aligned(32)));
uint32_t qtd_setup[8] __attribute__ ((aligned(32)));
uint32_t qtd_in[8] __attribute__ ((aligned(32)));
uint32_t qtd_outack[8] __attribute__ ((aligned(32)));
uint32_t setupbuf[2] __attribute__ ((aligned(8)));
uint32_t inbuf[16] __attribute__ ((aligned(64)));
void setup()
@ -77,23 +80,23 @@ void setup()
qh[0] = ((uint32_t)qh) | 2;
qh[1] = 0x0040E000; // addr=0, ep=0
qh[2] = 0x40000000;
qh[3] = (uint32_t)qtd_setup;
qh[3] = 0;
qh[4] = 1;
qh[5] = 0;
qh[6] = 0;
qh[5] = 1;
qh[6] = 0x40;
qh[7] = 0;
qh[8] = 0;
qh[9] = 0;
qh[10] = 0;
qh[11] = 0;
qtd_setup[0] = 1;
qtd_setup[1] = 1;
qtd_setup[2] = 0; // 0 = not active
qtd_setup[3] = 0;
qtd_setup[4] = 0;
qtd_setup[5] = 0;
qtd_setup[6] = 0;
qtd_setup[7] = 0;
qtd_dummy[0] = 1;
qtd_dummy[1] = 1;
qtd_dummy[2] = 0x40; // 0x40 = halted
qtd_dummy[3] = 0;
qtd_dummy[4] = 0;
qtd_dummy[5] = 0;
qtd_dummy[6] = 0;
qtd_dummy[7] = 0;
// turn on the USBHS controller
USBHS_USBMODE = USBHS_USBMODE_TXHSD(5) | USBHS_USBMODE_CM(3); // host mode
@ -103,7 +106,8 @@ void setup()
USBHS_ASYNCLISTADDR = (uint32_t)qh;
USBHS_USBCMD = USBHS_USBCMD_ITC(0) | USBHS_USBCMD_RS | USBHS_USBCMD_ASP(3) |
USBHS_USBCMD_FS2 | USBHS_USBCMD_FS(0) | // periodic table is 64 pointers
USBHS_USBCMD_PSE | USBHS_USBCMD_ASE;
// USBHS_USBCMD_PSE |
USBHS_USBCMD_ASE;
USBHS_PORTSC1 |= USBHS_PORTSC_PP;
//USBHS_PORTSC1 |= USBHS_PORTSC_PFSC; // force 12 Mbit/sec
//USBHS_PORTSC1 |= USBHS_PORTSC_PHCD; // phy off
@ -182,6 +186,58 @@ void port_status()
}
void read_descriptor(uint16_t value, uint16_t index, uint32_t len)
{
uint32_t token;
if (len > 512) len = 512;
Serial.println("Read Device Descriptor...");
qtd_setup[0] = (uint32_t)qtd_in;
qtd_setup[1] = 1;
qtd_setup[2] = 0x00080E80;
qtd_setup[3] = (uint32_t)setupbuf;
setupbuf[0] = (value << 16) | (0x06 << 8) | 0x80;
setupbuf[1] = (len << 16) | index;
qtd_in[0] = (uint32_t)qtd_outack;
qtd_in[1] = 1;
qtd_in[2] = 0x80000000 | (len << 16) | 0x0D80;
qtd_in[3] = (uint32_t)inbuf;
qtd_outack[0] = 1;
qtd_outack[1] = 1;
qtd_outack[2] = 0x80400C80;
qtd_outack[3] = 0;
// add to QH
// Save the content of the token field of the first qTD to be added
token = qtd_setup[2];
// Change the token of the first qTD so its Halted bit is set as 1
// and all other bits are zero
qtd_setup[2] = 0x40;
// copy the content of the first qTD to the dummy qTD
memcpy(qtd_dummy, qtd_setup, 32);
// Link the first qTD to the last of the qTD of the newly qTD list
qtd_outack[0] = (uint32_t)qtd_setup;
// Restore the token value to the previous dummy qTD's oken field
qtd_dummy[2] = token;
// qtd_setup becomes the dummy token... so this only works once!
delay(1);
Serial.println(qtd_dummy[2], HEX);
Serial.println(qtd_in[2], HEX);
Serial.println(qtd_outack[2], HEX);
Serial.println(qtd_setup[2], HEX);
}
void loop()
{
static unsigned int count=0;
@ -201,6 +257,9 @@ void loop()
Serial.println("End Reset Sequence...");
USBHS_PORTSC1 &= ~USBHS_PORTSC_PR;
}
if (count == 22) {
read_descriptor(1, 0, 8); // device descriptor
}
if (count > 5000) {
while (1) ; // stop here
}