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Detect device attach

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This commit is contained in:
PaulStoffregen 2016-06-26 21:55:58 -07:00
parent a555e59e7d
commit 9264f60908
1 changed files with 93 additions and 7 deletions
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100
k66_usbhost.ino
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@ -2,6 +2,8 @@
void setup()
{
pinMode(32, OUTPUT); // pin 32 = USB switch, high=connect device
digitalWrite(32, LOW);
while (!Serial) ; // wait
print("USB Host Testing");
MCG_C1 |= MCG_C1_IRCLKEN; // enable MCGIRCLK 32kHz
@ -24,25 +26,109 @@ void setup()
count++;
}
print("PLL locked, waited ", count);
USBPHY_PLL_SIC |= USBPHY_PLL_SIC_PLL_EN_USB_CLKS;
USBPHY_PWD = 0;
delay(10);
// sanity check, connect 470K pullup & 100K pulldown and watch D+ voltage change
//USBPHY_ANACTRL_CLR = (1<<10); // turn off both 15K pulldowns... works! :)
SIM_SOPT2 = SIM_SOPT2 & (~SIM_SOPT2_CLKOUTSEL(7)) | SIM_SOPT2_CLKOUTSEL(3); // LPO 1kHz
SIM_SOPT2 = SIM_SOPT2 & (~SIM_SOPT2_CLKOUTSEL(7)) | SIM_SOPT2_CLKOUTSEL(2); // Flash
SIM_SOPT2 = SIM_SOPT2 & (~SIM_SOPT2_CLKOUTSEL(7)) | SIM_SOPT2_CLKOUTSEL(6); // XTAL
SIM_SOPT2 = SIM_SOPT2 & (~SIM_SOPT2_CLKOUTSEL(7)) | SIM_SOPT2_CLKOUTSEL(7); // IRC 48MHz
SIM_SOPT2 = SIM_SOPT2 & (~SIM_SOPT2_CLKOUTSEL(7)) | SIM_SOPT2_CLKOUTSEL(4); // MCGIRCLK
CORE_PIN9_CONFIG = PORT_PCR_MUX(5); // CLKOUT on PTC3 Alt5 (Arduino pin 9)
// sanity check, output clocks on pin 9 for testing
//SIM_SOPT2 = SIM_SOPT2 & (~SIM_SOPT2_CLKOUTSEL(7)) | SIM_SOPT2_CLKOUTSEL(3); // LPO 1kHz
//SIM_SOPT2 = SIM_SOPT2 & (~SIM_SOPT2_CLKOUTSEL(7)) | SIM_SOPT2_CLKOUTSEL(2); // Flash
//SIM_SOPT2 = SIM_SOPT2 & (~SIM_SOPT2_CLKOUTSEL(7)) | SIM_SOPT2_CLKOUTSEL(6); // XTAL
//SIM_SOPT2 = SIM_SOPT2 & (~SIM_SOPT2_CLKOUTSEL(7)) | SIM_SOPT2_CLKOUTSEL(7); // IRC 48MHz
//SIM_SOPT2 = SIM_SOPT2 & (~SIM_SOPT2_CLKOUTSEL(7)) | SIM_SOPT2_CLKOUTSEL(4); // MCGIRCLK
//CORE_PIN9_CONFIG = PORT_PCR_MUX(5); // CLKOUT on PTC3 Alt5 (Arduino pin 9)
// EHCI registers page default
// -------------- ---- -------
// USBHS_USBCMD 1599 00080000
// USBHS_USBSTS 1602 00000000
// USBHS_USBINTR 1606 00000000
// USBHS_FRINDEX 1609 00000000
// USBHS_PERIODICLISTBASE 1610 undefine
// USBHS_ASYNCLISTADDR 1612 undefine
// USBHS_PORTSC 1619 00002000
// USBHS_USBMODE 1629 00005000
USBHS_USBINTR = 0;
USBHS_PERIODICLISTBASE = 0; // TODO: data..
USBHS_ASYNCLISTADDR = 0; // TODO: data..
// turn on the USBHS controller
USBHS_USBMODE = USBHS_USBMODE_TXHSD(5) | USBHS_USBMODE_CM(3); // host mode
USBHS_USBCMD = USBHS_USBCMD_ITC(8) | USBHS_USBCMD_RS |
USBHS_USBCMD_FS2 | USBHS_USBCMD_FS(0); // periodic table is 64 pointers
USBHS_PORTSC1 |= USBHS_PORTSC_PP;
}
void port_status()
{
uint32_t n;
Serial.print("Port: ");
n = USBHS_PORTSC1;
if (n & USBHS_PORTSC_PR) {
Serial.print("reset ");
}
if (n & USBHS_PORTSC_PP) {
Serial.print("on ");
} else {
Serial.print("off ");
}
if (n & USBHS_PORTSC_PE) {
if (USBHS_PORTSC_SUSP) {
Serial.print("suspend ");
} else {
Serial.print("enable "); // not working... why?
}
} else {
Serial.print("disable ");
}
Serial.print("speed=");
switch ((n >> 26) & 3) {
case 0: Serial.print("12 Mbps "); break;
case 1: Serial.print("1.5 Mbps "); break;
case 2: Serial.print("480 Mbps "); break;
default: Serial.print("(undef) ");
}
if (n & USBHS_PORTSC_HSP) {
Serial.print("highspeed ");
}
if (n & USBHS_PORTSC_OCA) {
Serial.print("overcurrent ");
}
if (n & USBHS_PORTSC_CCS) {
Serial.print("connected");
} else {
Serial.print("not-connected");
}
Serial.println();
}
void loop()
{
// do nothing (yet)
static unsigned int count=0;
port_status();
delay(1);
count++;
if (count == 2) {
Serial.println("Plug in device...");
digitalWrite(32, HIGH); // connect device
}
if (count == 6) {
Serial.println("Initiate Reset Sequence...");
USBHS_PORTSC1 |= USBHS_PORTSC_PR;
}
if (count == 16) {
Serial.println("End Reset Sequence...");
USBHS_PORTSC1 &= ~USBHS_PORTSC_PR;
}
}
void print(const char *s)