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https://github.com/gdsports/USBHost_t36
synced 2024-11-05 08:45:10 -05:00
Reset & enable port, but EHCI stops with error :-(
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@ -1,19 +1,26 @@
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// usb host experiments....
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//void * periodictable[64] __attribute__ ((section(".dmabuffers"), used, aligned(4096)))
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uint32_t periodictable[64] __attribute__ ((aligned(4096)));
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void setup()
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{
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pinMode(32, OUTPUT); // pin 32 = USB switch, high=connect device
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digitalWrite(32, LOW);
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while (!Serial) ; // wait
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print("USB Host Testing");
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MPU_RGDAAC0 |= 0x30000000;
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MCG_C1 |= MCG_C1_IRCLKEN; // enable MCGIRCLK 32kHz
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OSC0_CR |= OSC_ERCLKEN;
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SIM_SOPT2 |= SIM_SOPT2_USBREGEN; // turn on USB regulator
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SIM_SOPT2 &= ~SIM_SOPT2_USBSLSRC; // use IRC for slow clock
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print("power up USBHS PHY");
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SIM_USBPHYCTL |= SIM_USBPHYCTL_USBDISILIM; // disable USB current limit
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SIM_USBPHYCTL = SIM_USBPHYCTL_USBDISILIM | SIM_USBPHYCTL_USB3VOUTTRG(6); // pg 237
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//SIM_USBPHYCTL = SIM_USBPHYCTL_USBDISILIM | SIM_USBPHYCTL_USB3VOUTTRG(6); // pg 237
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SIM_SCGC3 |= SIM_SCGC3_USBHSDCD | SIM_SCGC3_USBHSPHY | SIM_SCGC3_USBHS;
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USBHSDCD_CLOCK = 33 << 2;
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print("init USBHS PHY & PLL");
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// init process: page 1681-1682
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USBPHY_CTRL &= ~USBPHY_CTRL_SFTRST; // CTRL pg 1698
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@ -52,15 +59,32 @@ void setup()
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// USBHS_PORTSC 1619 00002000
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// USBHS_USBMODE 1629 00005000
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print("begin ehci reset");
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USBHS_USBCMD |= USBHS_USBCMD_RST;
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count = 0;
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while (USBHS_USBCMD & USBHS_USBCMD_RST) {
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count;
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}
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print(" reset waited ", count);
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for (int i=0; i < 64; i++) {
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//periodictable[i] = (void *)1;
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periodictable[i] = 1;
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}
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USBHS_USBINTR = 0;
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USBHS_PERIODICLISTBASE = 0; // TODO: data..
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USBHS_PERIODICLISTBASE = (uint32_t)periodictable;
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USBHS_FRINDEX = 0;
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USBHS_ASYNCLISTADDR = 0; // TODO: data..
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// turn on the USBHS controller
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USBHS_USBMODE = USBHS_USBMODE_TXHSD(5) | USBHS_USBMODE_CM(3); // host mode
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USBHS_USBCMD = USBHS_USBCMD_ITC(8) | USBHS_USBCMD_RS |
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USBHS_USBCMD_FS2 | USBHS_USBCMD_FS(0); // periodic table is 64 pointers
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USBHS_USBCMD = USBHS_USBCMD_ITC(0) | USBHS_USBCMD_RS | USBHS_USBCMD_ASP(3) |
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USBHS_USBCMD_FS2 | USBHS_USBCMD_FS(0) | // periodic table is 64 pointers
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USBHS_USBCMD_PSE;
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USBHS_PORTSC1 |= USBHS_PORTSC_PP;
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//USBHS_PORTSC1 |= USBHS_PORTSC_PFSC; // force 12 Mbit/sec
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//USBHS_PORTSC1 |= USBHS_PORTSC_PHCD; // phy off
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}
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void port_status()
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@ -77,12 +101,14 @@ void port_status()
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} else {
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Serial.print("off ");
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}
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if (n & USBHS_PORTSC_PHCD) {
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Serial.print("phyoff ");
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}
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if (n & USBHS_PORTSC_PE) {
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if (USBHS_PORTSC_SUSP) {
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if (n & USBHS_PORTSC_SUSP) {
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Serial.print("suspend ");
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} else {
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Serial.print("enable "); // not working... why?
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Serial.print("enable ");
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}
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} else {
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Serial.print("disable ");
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@ -101,10 +127,24 @@ void port_status()
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Serial.print("overcurrent ");
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}
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if (n & USBHS_PORTSC_CCS) {
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Serial.print("connected");
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Serial.print("connected ");
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} else {
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Serial.print("not-connected");
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Serial.print("not-connected ");
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}
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// print info about the EHCI status
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Serial.print(" run=");
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Serial.print(USBHS_USBCMD & 1); // running mode
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Serial.print(",halt=");
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Serial.print((USBHS_USBSTS >> 12) & 1); // halted mode
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Serial.print(",err=");
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Serial.print((USBHS_USBSTS >> 4) & 1); // error encountered!
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Serial.print(",asyn=");
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Serial.print((USBHS_USBSTS >> 15) & 1); // running the async schedule
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Serial.print(",per=");
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Serial.print((USBHS_USBSTS >> 14) & 1); // running the periodic schedule
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Serial.print(",index=");
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Serial.print(USBHS_FRINDEX); // periodic index
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Serial.println();
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}
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@ -120,15 +160,17 @@ void loop()
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Serial.println("Plug in device...");
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digitalWrite(32, HIGH); // connect device
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}
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if (count == 6) {
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if (count == 5) {
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Serial.println("Initiate Reset Sequence...");
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USBHS_PORTSC1 |= USBHS_PORTSC_PR;
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}
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if (count == 16) {
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if (count == 15) {
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Serial.println("End Reset Sequence...");
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USBHS_PORTSC1 &= ~USBHS_PORTSC_PR;
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}
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if (count > 5000) {
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while (1) ; // stop here
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}
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}
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void print(const char *s)
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