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mirror of https://github.com/gdsports/USBHost_t36 synced 2024-11-11 19:55:04 -05:00
USBHost_t36/k66_usbhost.ino

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Arduino
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// usb host experiments....
//void * periodictable[64] __attribute__ ((section(".dmabuffers"), used, aligned(4096)))
uint32_t periodictable[64] __attribute__ ((aligned(4096)));
void setup()
{
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pinMode(32, OUTPUT); // pin 32 = USB switch, high=connect device
digitalWrite(32, LOW);
while (!Serial) ; // wait
print("USB Host Testing");
MPU_RGDAAC0 |= 0x30000000;
MCG_C1 |= MCG_C1_IRCLKEN; // enable MCGIRCLK 32kHz
OSC0_CR |= OSC_ERCLKEN;
SIM_SOPT2 |= SIM_SOPT2_USBREGEN; // turn on USB regulator
SIM_SOPT2 &= ~SIM_SOPT2_USBSLSRC; // use IRC for slow clock
print("power up USBHS PHY");
SIM_USBPHYCTL |= SIM_USBPHYCTL_USBDISILIM; // disable USB current limit
//SIM_USBPHYCTL = SIM_USBPHYCTL_USBDISILIM | SIM_USBPHYCTL_USB3VOUTTRG(6); // pg 237
SIM_SCGC3 |= SIM_SCGC3_USBHSDCD | SIM_SCGC3_USBHSPHY | SIM_SCGC3_USBHS;
USBHSDCD_CLOCK = 33 << 2;
print("init USBHS PHY & PLL");
// init process: page 1681-1682
USBPHY_CTRL &= ~USBPHY_CTRL_SFTRST; // CTRL pg 1698
USBPHY_CTRL &= ~USBPHY_CTRL_CLKGATE;
USBPHY_PLL_SIC |= USBPHY_PLL_SIC_PLL_POWER;
USBPHY_PLL_SIC |= USBPHY_PLL_SIC_PLL_DIV_SEL(1); // PLL_SIC pg 1708
// wait for the PLL to lock
int count=0;
while ((USBPHY_PLL_SIC & USBPHY_PLL_SIC_PLL_LOCK) == 0) {
count++;
}
print("PLL locked, waited ", count);
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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! :)
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// 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
print("begin ehci reset");
USBHS_USBCMD |= USBHS_USBCMD_RST;
count = 0;
while (USBHS_USBCMD & USBHS_USBCMD_RST) {
count;
}
print(" reset waited ", count);
for (int i=0; i < 64; i++) {
//periodictable[i] = (void *)1;
periodictable[i] = 1;
}
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USBHS_USBINTR = 0;
USBHS_PERIODICLISTBASE = (uint32_t)periodictable;
USBHS_FRINDEX = 0;
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USBHS_ASYNCLISTADDR = 0; // TODO: data..
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// turn on the USBHS controller
USBHS_USBMODE = USBHS_USBMODE_TXHSD(5) | USBHS_USBMODE_CM(3); // host mode
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;
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USBHS_PORTSC1 |= USBHS_PORTSC_PP;
//USBHS_PORTSC1 |= USBHS_PORTSC_PFSC; // force 12 Mbit/sec
//USBHS_PORTSC1 |= USBHS_PORTSC_PHCD; // phy off
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}
void port_status()
{
uint32_t n;
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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_PHCD) {
Serial.print("phyoff ");
}
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if (n & USBHS_PORTSC_PE) {
if (n & USBHS_PORTSC_SUSP) {
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Serial.print("suspend ");
} else {
Serial.print("enable ");
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}
} 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 ");
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} else {
Serial.print("not-connected ");
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}
// print info about the EHCI status
Serial.print(" run=");
Serial.print(USBHS_USBCMD & 1); // running mode
Serial.print(",halt=");
Serial.print((USBHS_USBSTS >> 12) & 1); // halted mode
Serial.print(",err=");
Serial.print((USBHS_USBSTS >> 4) & 1); // error encountered!
Serial.print(",asyn=");
Serial.print((USBHS_USBSTS >> 15) & 1); // running the async schedule
Serial.print(",per=");
Serial.print((USBHS_USBSTS >> 14) & 1); // running the periodic schedule
Serial.print(",index=");
Serial.print(USBHS_FRINDEX); // periodic index
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Serial.println();
}
void loop()
{
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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 == 5) {
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Serial.println("Initiate Reset Sequence...");
USBHS_PORTSC1 |= USBHS_PORTSC_PR;
}
if (count == 15) {
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Serial.println("End Reset Sequence...");
USBHS_PORTSC1 &= ~USBHS_PORTSC_PR;
}
if (count > 5000) {
while (1) ; // stop here
}
}
void print(const char *s)
{
Serial.println(s);
delay(10);
}
void print(const char *s, int num)
{
Serial.print(s);
Serial.println(num);
delay(10);
}