moparisthebest
/
USBHost_t36
mirror of https://github.com/gdsports/USBHost_t36
1
0
Fork 0
Code Issues Releases Wiki Activity

Use interrupts instead of polling

This commit is contained in:
PaulStoffregen 2017-01-23 04:47:54 -08:00
parent 10d5df3547
commit c98ba51e6d
1 changed files with 121 additions and 13 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

134
k66_usbhost.ino
View File

@ -9,13 +9,20 @@ 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)));
uint8_t port_state;
#define PORT_STATE_DISCONNECTED 0
#define PORT_STATE_DEBOUNCE 1
#define PORT_STATE_RESET 2
#define PORT_STATE_RECOVERY 3
#define PORT_STATE_ACTIVE 4
void setup()
{
// Test board has a USB data mux (this won't be on final Teensy 3.6)
pinMode(32, OUTPUT); // pin 32 = USB switch, high=connect device
digitalWrite(32, LOW);
pinMode(30, OUTPUT); // pin 30 = debug info - use oscilloscope
digitalWrite(30, LOW);
// Teensy 3.6 has USB host power controlled by PTE6
PORTE_PCR6 = PORT_PCR_MUX(1);
GPIOE_PDDR |= (1<<6);
@ -60,17 +67,6 @@ void setup()
//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;
@ -102,6 +98,7 @@ void setup()
qtd_dummy[5] = 0;
qtd_dummy[6] = 0;
qtd_dummy[7] = 0;
port_state = PORT_STATE_DISCONNECTED;
// turn on the USBHS controller
USBHS_USBMODE = USBHS_USBMODE_TXHSD(5) | USBHS_USBMODE_CM(3); // host mode
@ -113,6 +110,8 @@ void setup()
USBHS_USBCMD_FS2 | USBHS_USBCMD_FS(0) | // periodic table is 64 pointers
// USBHS_USBCMD_PSE |
USBHS_USBCMD_ASE;
//USBHS_PORTSC1 = USBHS_PORTSC_PP;
USBHS_PORTSC1 |= USBHS_PORTSC_PP;
//USBHS_PORTSC1 |= USBHS_PORTSC_PFSC; // force 12 Mbit/sec
//USBHS_PORTSC1 |= USBHS_PORTSC_PHCD; // phy off
@ -123,8 +122,114 @@ void setup()
Serial.println(USBHS_PERIODICLISTBASE, HEX);
Serial.print("periodictable = ");
Serial.println((uint32_t)periodictable, HEX);
NVIC_ENABLE_IRQ(IRQ_USBHS);
USBHS_USBINTR = USBHS_USBINTR_UE | USBHS_USBINTR_PCE | USBHS_USBINTR_TIE0;
delay(25);
Serial.println("Plug in device...");
digitalWrite(32, HIGH); // connect device
}
void pulse(int usec)
{
// connect oscilloscope to see these pulses....
digitalWriteFast(30, HIGH);
delayMicroseconds(usec);
digitalWriteFast(30, LOW);
}
// EHCI registers page default
// -------------- ---- -------
// USBHS_USBCMD 1599 00080000 USB Command
// USBHS_USBSTS 1602 00000000 USB Status
// USBHS_USBINTR 1606 00000000 USB Interrupt Enable
// USBHS_FRINDEX 1609 00000000 Frame Index Register
// USBHS_PERIODICLISTBASE 1610 undefine Periodic Frame List Base Address
// USBHS_ASYNCLISTADDR 1612 undefine Asynchronous List Address
// USBHS_PORTSC1 1619 00002000 Port Status and Control
// USBHS_USBMODE 1629 00005000 USB Mode
// USBHS_GPTIMERnCTL 1591 00000000 General Purpose Timer n Control
// PORT_STATE_DISCONNECTED 0
// PORT_STATE_DEBOUNCE 1
// PORT_STATE_RESET 2
// PORT_STATE_RECOVERY 3
// PORT_STATE_ACTIVE 4
void usbhs_isr(void) // USBHS_ISR_HOST
{
uint32_t stat = USBHS_USBSTS;
USBHS_USBSTS = stat; // clear pending interrupts
//stat &= USBHS_USBINTR; // mask away unwanted interrupts
Serial.print("isr:");
Serial.print(stat, HEX);
Serial.println();
if (stat & USBHS_USBSTS_PCI) { // port change detected
const uint32_t portstat = USBHS_PORTSC1;
Serial.print("port change: ");
Serial.print(portstat, HEX);
Serial.println();
USBHS_PORTSC1 = portstat | (USBHS_PORTSC_OCC|USBHS_PORTSC_PEC|USBHS_PORTSC_CSC);
if (portstat & USBHS_PORTSC_OCC) {
Serial.println(" overcurrent change");
}
if (portstat & USBHS_PORTSC_CSC) {
if (portstat & USBHS_PORTSC_CCS) {
Serial.println(" connect");
if (port_state == PORT_STATE_DISCONNECTED
|| port_state == PORT_STATE_DEBOUNCE) {
// 100 ms debounce (USB 2.0: TATTDB, page 150 & 188)
port_state = PORT_STATE_DEBOUNCE;
USBHS_GPTIMER0LD = 100000; // microseconds
USBHS_GPTIMER0CTL =
USBHS_GPTIMERCTL_RST | USBHS_GPTIMERCTL_RUN;
stat &= ~USBHS_USBSTS_TI0;
}
} else {
Serial.println(" disconnect");
port_state = PORT_STATE_DISCONNECTED;
// TODO: delete & clean up device state...
}
}
if (portstat & USBHS_PORTSC_PEC) {
// PEC bit only detects disable
Serial.println(" disable");
} else if (port_state == PORT_STATE_RESET && portstat & USBHS_PORTSC_PE) {
Serial.println(" port enabled");
port_state = PORT_STATE_RECOVERY;
// 10 ms reset recover (USB 2.0: TRSTRCY, page 151 & 188)
USBHS_GPTIMER0LD = 10000; // microseconds
USBHS_GPTIMER0CTL = USBHS_GPTIMERCTL_RST | USBHS_GPTIMERCTL_RUN;
}
if (portstat & USBHS_PORTSC_FPR) {
Serial.println(" force resume");
}
pulse(1);
}
if (stat & USBHS_USBSTS_TI0) { // timer 0
Serial.println("timer");
pulse(2);
if (port_state == PORT_STATE_DEBOUNCE) {
port_state = PORT_STATE_RESET;
USBHS_PORTSC1 |= USBHS_PORTSC_PR; // begin reset sequence
Serial.println(" begin reset");
} else if (port_state == PORT_STATE_RECOVERY) {
port_state = PORT_STATE_ACTIVE;
Serial.println(" end recovery");
}
}
}
void port_status()
{
uint32_t n;
@ -240,11 +345,13 @@ void read_descriptor(uint16_t value, uint16_t index, uint32_t len)
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;
port_status();
@ -265,9 +372,10 @@ void loop()
if (count == 22) {
read_descriptor(1, 0, 8); // device descriptor
}
if (count > 5000) {
if (count > 500) {
while (1) ; // stop here
}
*/
}
void print(const char *s)