mirror of
https://github.com/gdsports/USBHost_t36
synced 2024-11-24 01:52:23 -05:00
Use interrupts instead of polling
This commit is contained in:
PaulStoffregen
parent
10d5df3547
commit
c98ba51e6d
134
k66_usbhost.ino
134
k66_usbhost.ino
@ -9,13 +9,20 @@ uint32_t qtd_in[8] __attribute__ ((aligned(32)));
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uint32_t qtd_outack[8] __attribute__ ((aligned(32)));
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uint32_t setupbuf[2] __attribute__ ((aligned(8)));
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uint32_t inbuf[16] __attribute__ ((aligned(64)));
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uint8_t port_state;
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#define PORT_STATE_DISCONNECTED 0
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#define PORT_STATE_DEBOUNCE 1
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#define PORT_STATE_RESET 2
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#define PORT_STATE_RECOVERY 3
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#define PORT_STATE_ACTIVE 4
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void setup()
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{
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// Test board has a USB data mux (this won't be on final Teensy 3.6)
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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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pinMode(30, OUTPUT); // pin 30 = debug info - use oscilloscope
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digitalWrite(30, LOW);
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// Teensy 3.6 has USB host power controlled by PTE6
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PORTE_PCR6 = PORT_PCR_MUX(1);
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GPIOE_PDDR |= (1<<6);
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@ -60,17 +67,6 @@ void setup()
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//SIM_SOPT2 = SIM_SOPT2 & (~SIM_SOPT2_CLKOUTSEL(7)) | SIM_SOPT2_CLKOUTSEL(4); // MCGIRCLK
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//CORE_PIN9_CONFIG = PORT_PCR_MUX(5); // CLKOUT on PTC3 Alt5 (Arduino pin 9)
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// EHCI registers page default
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// -------------- ---- -------
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// USBHS_USBCMD 1599 00080000
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// USBHS_USBSTS 1602 00000000
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// USBHS_USBINTR 1606 00000000
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// USBHS_FRINDEX 1609 00000000
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// USBHS_PERIODICLISTBASE 1610 undefine
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// USBHS_ASYNCLISTADDR 1612 undefine
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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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@ -102,6 +98,7 @@ void setup()
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qtd_dummy[5] = 0;
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qtd_dummy[6] = 0;
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qtd_dummy[7] = 0;
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port_state = PORT_STATE_DISCONNECTED;
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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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@ -113,6 +110,8 @@ void setup()
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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_USBCMD_ASE;
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//USBHS_PORTSC1 = USBHS_PORTSC_PP;
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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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@ -123,8 +122,114 @@ void setup()
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Serial.println(USBHS_PERIODICLISTBASE, HEX);
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Serial.print("periodictable = ");
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Serial.println((uint32_t)periodictable, HEX);
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NVIC_ENABLE_IRQ(IRQ_USBHS);
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USBHS_USBINTR = USBHS_USBINTR_UE | USBHS_USBINTR_PCE | USBHS_USBINTR_TIE0;
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delay(25);
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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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void pulse(int usec)
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{
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// connect oscilloscope to see these pulses....
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digitalWriteFast(30, HIGH);
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delayMicroseconds(usec);
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digitalWriteFast(30, LOW);
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}
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// EHCI registers page default
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// -------------- ---- -------
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// USBHS_USBCMD 1599 00080000 USB Command
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// USBHS_USBSTS 1602 00000000 USB Status
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// USBHS_USBINTR 1606 00000000 USB Interrupt Enable
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// USBHS_FRINDEX 1609 00000000 Frame Index Register
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// USBHS_PERIODICLISTBASE 1610 undefine Periodic Frame List Base Address
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// USBHS_ASYNCLISTADDR 1612 undefine Asynchronous List Address
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// USBHS_PORTSC1 1619 00002000 Port Status and Control
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// USBHS_USBMODE 1629 00005000 USB Mode
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// USBHS_GPTIMERnCTL 1591 00000000 General Purpose Timer n Control
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// PORT_STATE_DISCONNECTED 0
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// PORT_STATE_DEBOUNCE 1
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// PORT_STATE_RESET 2
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// PORT_STATE_RECOVERY 3
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// PORT_STATE_ACTIVE 4
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void usbhs_isr(void) // USBHS_ISR_HOST
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{
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uint32_t stat = USBHS_USBSTS;
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USBHS_USBSTS = stat; // clear pending interrupts
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//stat &= USBHS_USBINTR; // mask away unwanted interrupts
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Serial.print("isr:");
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Serial.print(stat, HEX);
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Serial.println();
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if (stat & USBHS_USBSTS_PCI) { // port change detected
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const uint32_t portstat = USBHS_PORTSC1;
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Serial.print("port change: ");
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Serial.print(portstat, HEX);
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Serial.println();
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USBHS_PORTSC1 = portstat | (USBHS_PORTSC_OCC|USBHS_PORTSC_PEC|USBHS_PORTSC_CSC);
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if (portstat & USBHS_PORTSC_OCC) {
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Serial.println(" overcurrent change");
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}
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if (portstat & USBHS_PORTSC_CSC) {
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if (portstat & USBHS_PORTSC_CCS) {
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Serial.println(" connect");
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if (port_state == PORT_STATE_DISCONNECTED
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|| port_state == PORT_STATE_DEBOUNCE) {
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// 100 ms debounce (USB 2.0: TATTDB, page 150 & 188)
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port_state = PORT_STATE_DEBOUNCE;
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USBHS_GPTIMER0LD = 100000; // microseconds
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USBHS_GPTIMER0CTL =
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USBHS_GPTIMERCTL_RST | USBHS_GPTIMERCTL_RUN;
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stat &= ~USBHS_USBSTS_TI0;
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}
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} else {
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Serial.println(" disconnect");
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port_state = PORT_STATE_DISCONNECTED;
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// TODO: delete & clean up device state...
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}
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}
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if (portstat & USBHS_PORTSC_PEC) {
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// PEC bit only detects disable
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Serial.println(" disable");
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} else if (port_state == PORT_STATE_RESET && portstat & USBHS_PORTSC_PE) {
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Serial.println(" port enabled");
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port_state = PORT_STATE_RECOVERY;
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// 10 ms reset recover (USB 2.0: TRSTRCY, page 151 & 188)
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USBHS_GPTIMER0LD = 10000; // microseconds
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USBHS_GPTIMER0CTL = USBHS_GPTIMERCTL_RST | USBHS_GPTIMERCTL_RUN;
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}
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if (portstat & USBHS_PORTSC_FPR) {
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Serial.println(" force resume");
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}
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pulse(1);
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}
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if (stat & USBHS_USBSTS_TI0) { // timer 0
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Serial.println("timer");
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pulse(2);
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if (port_state == PORT_STATE_DEBOUNCE) {
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port_state = PORT_STATE_RESET;
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USBHS_PORTSC1 |= USBHS_PORTSC_PR; // begin reset sequence
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Serial.println(" begin reset");
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} else if (port_state == PORT_STATE_RECOVERY) {
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port_state = PORT_STATE_ACTIVE;
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Serial.println(" end recovery");
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}
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}
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}
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void port_status()
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{
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uint32_t n;
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@ -240,11 +345,13 @@ void read_descriptor(uint16_t value, uint16_t index, uint32_t len)
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Serial.println(qtd_in[2], HEX);
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Serial.println(qtd_outack[2], HEX);
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Serial.println(qtd_setup[2], HEX);
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}
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void loop()
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{
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/*
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static unsigned int count=0;
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port_status();
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@ -265,9 +372,10 @@ void loop()
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if (count == 22) {
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read_descriptor(1, 0, 8); // device descriptor
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}
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if (count > 5000) {
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if (count > 500) {
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while (1) ; // stop here
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}
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*/
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}
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void print(const char *s)
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