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- Only need to decode a bunch more of the matrix to get the proper key assignments
- All of the infrastructure is in place for decoding like matrices for the teensy
This commit is contained in:
Jacob Alexander 2011-03-09 22:49:34 -08:00
parent 1bee2a6dc9
commit de0e8f8540
6 changed files with 1240 additions and 28 deletions
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4
Makefile
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@ -46,7 +46,9 @@ TARGET = main
# List C source files here. (C dependencies are automatically generated.)
SRC = $(TARGET).c \
usb_keyboard.c
print.c \
usb_keyboard_debug.c \
#usb_keyboard.c
# MCU name, you MUST set this to match the board you are using

233
main.c
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@ -23,12 +23,17 @@
#include <avr/pgmspace.h>
#include <avr/interrupt.h>
#include <util/delay.h>
#include "usb_keyboard.h"
//#include "usb_keyboard.h"
// TEMP INCLUDES
#include "usb_keyboard_debug.h"
#include <print.h>
#define CPU_PRESCALE(n) (CLKPR = 0x80, CLKPR = (n))
#define PRE_DRIVE_SLEEP
#define POST_DRIVE_SLEEP
// Sleep defined in milliseconds
#define PRE_DRIVE_SLEEP 50
#define POST_DRIVE_SLEEP 50
#define DRIVE_reg_1 PORTB
@ -57,39 +62,67 @@
#define DRIVE_pin_11 <blank>
#define DRIVE_pin_12 <blank>
#define DETECT_group_1 0
#define DETECT_group_2 0
#define DETECT_group_3 0
#define DETECT_group_4 0
#define DETECT_group_5 0
#define DETECT_group_6 0
#define DETECT_group_7 0
#define DETECT_group_8 0
#define DETECT_group_9 0
#define DETECT_group_1 1
#define DETECT_group_2 2
#define DETECT_group_3 3
#define DETECT_group_4 4
#define DETECT_group_5 5
#define DETECT_group_6 6
#define DETECT_group_7 7
#define DETECT_group_8 8
#define DETECT_group_9 9
#define DETECT_group_10 <blank>
#define DETECT_group_11 <blank>
#define DETECT_group_12 <blank>
// Change number of ORDs if number of lines differ
#define DETECT_group_size_1 7
#define DETECT_group_size_2 8
#define DETECT_group_size_3 8
#define DETECT_group_size_4 4
#define DETECT_group_size_5 8
#define DETECT_group_size_6 7
#define DETECT_group_size_7 7
#define DETECT_group_size_8 6
#define DETECT_group_size_9 7
#define DETECT_group_size_10 <blank>
#define DETECT_group_size_11 <blank>
#define DETECT_group_size_12 <blank>
#define DETECT_group_array_1 {{KEY_SLASH,KEY_RIGHT_BRACE,KEY_ENTER,KEY_D,KEY_2,KEY_Q,KEY_C},{0,0,0,0,0,0,0}}
#define DETECT_group_array_2 {{KEY_TILDE,KEY_DELETE,KEY_LEFT,KEY_SPACE,KEY_X,KEY_S,KEY_TAB,KEY_1},{0,0,0,0,0,0,0,0}}
#define DETECT_group_array_3 {{KEY_BACKSPACE,KEY_UP,KEY_DOWN,KEY_A,KEY_INSERT,KEY_ALT,KEY_Z,KEY_RIGHT},{0,0,0,0,0,1,0,0}}
#define DETECT_group_array_4 {{KEY_ESC ,KEY_CTRL,KEY_CAPS_LOCK,KEY_SHIFT} ,{0,1,0,1}}
#define DETECT_group_array_5 0
#define DETECT_group_array_6 0
#define DETECT_group_array_7 {{KEY_L ,KEY_O ,KEY_0 ,KEY_N ,KEY_H,KEY_R,KEY_5},{0,0,0,0,0,0,0}}
#define DETECT_group_array_8 0
#define DETECT_group_array_9 0
#define DETECT_group_array_10 <blank>
#define DETECT_group_array_11 <blank>
#define DETECT_group_array_12 <blank>
// XXX Change number of ORDs if number of lines differ
#define DD_LOOP \
for ( int c = 0;; c++ ) { \
for ( int c = 1;; c++ ) { \
switch ( c ) { \
DD_CASE_ORD(1) \
DD_CASE_ORD(2) \
DD_CASE_ORD(3) \
DD_CASE_ORD(4) \
DD_CASE_ORD(5) \
DD_CASE_ORD(6) \
DD_CASE_ORD(7) \
DD_CASE_ORD(8) \
DD_CASE_END(9,c) \
DD_CASE_END(4,c) \
} \
}
#define DRIVE_DETECT(reg,pin,group) \
reg |= (1 << pin);\
detection(group);\
reg &= (0 << pin);
reg &= ~(1 << pin); \
detection(group); \
reg |= (1 << pin); \
_delay_ms(POST_DRIVE_SLEEP);
#define DD_CASE(number) \
case number:\
@ -101,18 +134,164 @@
#define DD_CASE_END(number,var) \
DD_CASE(number) \
default: \
var = -1; \
break;
int main(void)
// Determine if key is either normal or a modifier
#define DET_GROUP_CHECK(index) \
{ \
if ( groupArray[1][index] ) \
curDetect.modifiers |= groupArray[0][index]; \
else \
curDetect.keyDetectArray[curDetect.keyDetectCount++] = groupArray[0][index]; \
}
// XXX - Detection Groups
// Checks each of the specified pins, and then if press detected, determine if the key is normal or a modifier
// Inverse logic applies for the PINs
// Used for 1 detection group
#define DET_GROUP_1 \
if ( !( PINB & (1 << 3) ) ) \
DET_GROUP_CHECK(3) \
if ( !( PINF & (1 << 1) ) ) \
DET_GROUP_CHECK(2) \
if ( !( PINF & (1 << 2) ) ) \
DET_GROUP_CHECK(1) \
if ( !( PINF & (1 << 3) ) ) \
DET_GROUP_CHECK(0)
// Used for 4 detection groups
#define DET_GROUP_2 \
if ( !( PINC & (1 << 0) ) ) \
DET_GROUP_CHECK(0) \
if ( !( PINC & (1 << 1) ) ) \
DET_GROUP_CHECK(1) \
if ( !( PINC & (1 << 2) ) ) \
DET_GROUP_CHECK(2) \
if ( !( PINC & (1 << 3) ) ) \
DET_GROUP_CHECK(3) \
if ( !( PINC & (1 << 4) ) ) \
DET_GROUP_CHECK(4) \
if ( !( PINC & (1 << 5) ) ) \
DET_GROUP_CHECK(5) \
if ( !( PINC & (1 << 6) ) ) \
DET_GROUP_CHECK(6) \
// Used for 1 detection group
#define DET_GROUP_3 \
if ( !( PINC & (1 << 0) ) ) \
DET_GROUP_CHECK(0) \
if ( !( PINC & (1 << 1) ) ) \
DET_GROUP_CHECK(1) \
if ( !( PINC & (1 << 2) ) ) \
DET_GROUP_CHECK(3) \
if ( !( PINC & (1 << 4) ) ) \
DET_GROUP_CHECK(4) \
if ( !( PINC & (1 << 5) ) ) \
DET_GROUP_CHECK(5) \
if ( !( PINC & (1 << 6) ) ) \
DET_GROUP_CHECK(6) \
// Used for 3 detection groups
#define DET_GROUP_4 \
if ( !( PINC & (1 << 0) ) ) \
DET_GROUP_CHECK(0) \
if ( !( PINC & (1 << 1) ) ) \
DET_GROUP_CHECK(1) \
if ( !( PINC & (1 << 2) ) ) \
DET_GROUP_CHECK(2) \
if ( !( PINC & (1 << 3) ) ) \
DET_GROUP_CHECK(3) \
if ( !( PINC & (1 << 4) ) ) \
DET_GROUP_CHECK(4) \
if ( !( PINC & (1 << 5) ) ) \
DET_GROUP_CHECK(5) \
if ( !( PINC & (1 << 6) ) ) \
DET_GROUP_CHECK(6) \
if ( !( PINE & (1 << 1) ) ) \
DET_GROUP_CHECK(7) \
// Combines the DET_GROUP_Xs above for the given groupArray
#define DET_GROUP(group,det_group) \
case group: \
{ \
uint8_t groupArray[2][DETECT_group_size##_##group] = DETECT_group_array##_##group; \
DET_GROUP##_##det_group \
} \
break;
struct keys {
uint8_t keyDetectCount;
uint8_t keyDetectArray[40];
uint8_t modifiers;
} curDetect, prevDetect;
void detection( int group )
{
_delay_ms(PRE_DRIVE_SLEEP);
curDetect.keyDetectCount = 0;
curDetect.modifiers = 0;
// XXX Modify for different detection groups <-> groupArray mappings
switch ( group ) {
DET_GROUP(1,2)
DET_GROUP(2,4)
DET_GROUP(3,4)
DET_GROUP(4,1)
//DET_GROUP(5,4)
//DET_GROUP(6,2)
//DET_GROUP(7,2)
//DET_GROUP(8,3)
//DET_GROUP(9,2)
}
// Print out the current keys pressed
if ( curDetect.keyDetectCount > 0 ) {
print("Keys: ");
for ( int c = 0; c < curDetect.keyDetectCount; c++ ) {
phex( curDetect.keyDetectArray[c] );
print(" ");
}
print("\n");
}
if ( curDetect.modifiers ) {
print("Modifiers: ");
phex( curDetect.modifiers );
print("\n");
}
}
// XXX This part is configurable
void pinSetup(void)
{
// For each pin, 0=input, 1=output
DDRA = 0x00;
DDRB = 0x07;
DDRC = 0x80;
DDRD = 0x00;
DDRE = 0xC0;
DDRF = 0x31;
// Setting pins to either high or pull-up resistor
PORTA = 0x00;
PORTB = 0xFF;
PORTC = 0xFF;
PORTD = 0x00;
PORTE = 0xFF;
PORTF = 0xFF;
}
int main( void )
{
// set for 16 MHz clock
CPU_PRESCALE( 0 );
// Configuring Pins
// TODO
pinSetup();
// Initialize the USB, and then wait for the host to set configuration.
// If the Teensy is powered without a PC connected to the USB port,

62
print.c Normal file
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@ -0,0 +1,62 @@
/* Very basic print functions, intended to be used with usb_debug_only.c
* http://www.pjrc.com/teensy/
* Copyright (c) 2008 PJRC.COM, LLC
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
// Version 1.0: Initial Release
#include <avr/io.h>
#include <avr/pgmspace.h>
#include "print.h"
void print_P(const char *s)
{
char c;
while (1) {
c = pgm_read_byte(s++);
if (!c) break;
if (c == '\n') usb_debug_putchar('\r');
usb_debug_putchar(c);
}
}
void phex1(unsigned char c)
{
usb_debug_putchar(c + ((c < 10) ? '0' : 'A' - 10));
}
void phex(unsigned char c)
{
phex1(c >> 4);
phex1(c & 15);
}
void phex16(unsigned int i)
{
phex(i >> 8);
phex(i);
}

16
print.h Normal file
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@ -0,0 +1,16 @@
#ifndef print_h__
#define print_h__
#include <avr/pgmspace.h>
#include "usb_keyboard_debug.h"
// this macro allows you to write print("some text") and
// the string is automatically placed into flash memory :)
#define print(s) print_P(PSTR(s))
#define pchar(c) usb_debug_putchar(c)
void print_P(const char *s);
void phex(unsigned char c);
void phex16(unsigned int i);
#endif

750
usb_keyboard_debug.c Normal file
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@ -0,0 +1,750 @@
/* USB Keyboard Plus Debug Channel Example for Teensy USB Development Board
* http://www.pjrc.com/teensy/usb_keyboard.html
* Copyright (c) 2009 PJRC.COM, LLC
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
// Version 1.0: Initial Release
// Version 1.1: Add support for Teensy 2.0
#define USB_SERIAL_PRIVATE_INCLUDE
#include "usb_keyboard_debug.h"
/**************************************************************************
*
* Configurable Options
*
**************************************************************************/
// You can change these to give your code its own name.
#define STR_MANUFACTURER L"MfgName"
#define STR_PRODUCT L"Keyboard"
// Mac OS-X and Linux automatically load the correct drivers. On
// Windows, even though the driver is supplied by Microsoft, an
// INF file is needed to load the driver. These numbers need to
// match the INF file.
#define VENDOR_ID 0x16C0
#define PRODUCT_ID 0x047D
// USB devices are supposed to implment a halt feature, which is
// rarely (if ever) used. If you comment this line out, the halt
// code will be removed, saving 102 bytes of space (gcc 4.3.0).
// This is not strictly USB compliant, but works with all major
// operating systems.
#define SUPPORT_ENDPOINT_HALT
/**************************************************************************
*
* Endpoint Buffer Configuration
*
**************************************************************************/
#define ENDPOINT0_SIZE 32
#define KEYBOARD_INTERFACE 0
#define KEYBOARD_ENDPOINT 3
#define KEYBOARD_SIZE 8
#define KEYBOARD_BUFFER EP_DOUBLE_BUFFER
#define DEBUG_INTERFACE 1
#define DEBUG_TX_ENDPOINT 4
#define DEBUG_TX_SIZE 32
#define DEBUG_TX_BUFFER EP_DOUBLE_BUFFER
static const uint8_t PROGMEM endpoint_config_table[] = {
0,
0,
1, EP_TYPE_INTERRUPT_IN, EP_SIZE(KEYBOARD_SIZE) | KEYBOARD_BUFFER,
1, EP_TYPE_INTERRUPT_IN, EP_SIZE(DEBUG_TX_SIZE) | DEBUG_TX_BUFFER
};
/**************************************************************************
*
* Descriptor Data
*
**************************************************************************/
// Descriptors are the data that your computer reads when it auto-detects
// this USB device (called "enumeration" in USB lingo). The most commonly
// changed items are editable at the top of this file. Changing things
// in here should only be done by those who've read chapter 9 of the USB
// spec and relevant portions of any USB class specifications!
static uint8_t PROGMEM device_descriptor[] = {
18, // bLength
1, // bDescriptorType
0x00, 0x02, // bcdUSB
0, // bDeviceClass
0, // bDeviceSubClass
0, // bDeviceProtocol
ENDPOINT0_SIZE, // bMaxPacketSize0
LSB(VENDOR_ID), MSB(VENDOR_ID), // idVendor
LSB(PRODUCT_ID), MSB(PRODUCT_ID), // idProduct
0x00, 0x01, // bcdDevice
1, // iManufacturer
2, // iProduct
0, // iSerialNumber
1 // bNumConfigurations
};
// Keyboard Protocol 1, HID 1.11 spec, Appendix B, page 59-60
static uint8_t PROGMEM keyboard_hid_report_desc[] = {
0x05, 0x01, // Usage Page (Generic Desktop),
0x09, 0x06, // Usage (Keyboard),
0xA1, 0x01, // Collection (Application),
0x75, 0x01, // Report Size (1),
0x95, 0x08, // Report Count (8),
0x05, 0x07, // Usage Page (Key Codes),
0x19, 0xE0, // Usage Minimum (224),
0x29, 0xE7, // Usage Maximum (231),
0x15, 0x00, // Logical Minimum (0),
0x25, 0x01, // Logical Maximum (1),
0x81, 0x02, // Input (Data, Variable, Absolute), ;Modifier byte
0x95, 0x01, // Report Count (1),
0x75, 0x08, // Report Size (8),
0x81, 0x03, // Input (Constant), ;Reserved byte
0x95, 0x05, // Report Count (5),
0x75, 0x01, // Report Size (1),
0x05, 0x08, // Usage Page (LEDs),
0x19, 0x01, // Usage Minimum (1),
0x29, 0x05, // Usage Maximum (5),
0x91, 0x02, // Output (Data, Variable, Absolute), ;LED report
0x95, 0x01, // Report Count (1),
0x75, 0x03, // Report Size (3),
0x91, 0x03, // Output (Constant), ;LED report padding
0x95, 0x06, // Report Count (6),
0x75, 0x08, // Report Size (8),
0x15, 0x00, // Logical Minimum (0),
0x25, 0x68, // Logical Maximum(104),
0x05, 0x07, // Usage Page (Key Codes),
0x19, 0x00, // Usage Minimum (0),
0x29, 0x68, // Usage Maximum (104),
0x81, 0x00, // Input (Data, Array),
0xc0 // End Collection
};
static uint8_t PROGMEM debug_hid_report_desc[] = {
0x06, 0x31, 0xFF, // Usage Page 0xFF31 (vendor defined)
0x09, 0x74, // Usage 0x74
0xA1, 0x53, // Collection 0x53
0x75, 0x08, // report size = 8 bits
0x15, 0x00, // logical minimum = 0
0x26, 0xFF, 0x00, // logical maximum = 255
0x95, DEBUG_TX_SIZE, // report count
0x09, 0x75, // usage
0x81, 0x02, // Input (array)
0xC0 // end collection
};
#define CONFIG1_DESC_SIZE (9+9+9+7+9+9+7)
#define KEYBOARD_HID_DESC_OFFSET (9+9)
#define DEBUG_HID_DESC_OFFSET (9+9+9+7+9)
static uint8_t PROGMEM config1_descriptor[CONFIG1_DESC_SIZE] = {
// configuration descriptor, USB spec 9.6.3, page 264-266, Table 9-10
9, // bLength;
2, // bDescriptorType;
LSB(CONFIG1_DESC_SIZE), // wTotalLength
MSB(CONFIG1_DESC_SIZE),
2, // bNumInterfaces
1, // bConfigurationValue
0, // iConfiguration
0xC0, // bmAttributes
50, // bMaxPower
// interface descriptor, USB spec 9.6.5, page 267-269, Table 9-12
9, // bLength
4, // bDescriptorType
KEYBOARD_INTERFACE, // bInterfaceNumber
0, // bAlternateSetting
1, // bNumEndpoints
0x03, // bInterfaceClass (0x03 = HID)
0x01, // bInterfaceSubClass (0x01 = Boot)
0x01, // bInterfaceProtocol (0x01 = Keyboard)
0, // iInterface
// HID interface descriptor, HID 1.11 spec, section 6.2.1
9, // bLength
0x21, // bDescriptorType
0x11, 0x01, // bcdHID
0, // bCountryCode
1, // bNumDescriptors
0x22, // bDescriptorType
sizeof(keyboard_hid_report_desc), // wDescriptorLength
0,
// endpoint descriptor, USB spec 9.6.6, page 269-271, Table 9-13
7, // bLength
5, // bDescriptorType
KEYBOARD_ENDPOINT | 0x80, // bEndpointAddress
0x03, // bmAttributes (0x03=intr)
KEYBOARD_SIZE, 0, // wMaxPacketSize
1, // bInterval
// interface descriptor, USB spec 9.6.5, page 267-269, Table 9-12
9, // bLength
4, // bDescriptorType
DEBUG_INTERFACE, // bInterfaceNumber
0, // bAlternateSetting
1, // bNumEndpoints
0x03, // bInterfaceClass (0x03 = HID)
0x00, // bInterfaceSubClass
0x00, // bInterfaceProtocol
0, // iInterface
// HID interface descriptor, HID 1.11 spec, section 6.2.1
9, // bLength
0x21, // bDescriptorType
0x11, 0x01, // bcdHID
0, // bCountryCode
1, // bNumDescriptors
0x22, // bDescriptorType
sizeof(debug_hid_report_desc), // wDescriptorLength
0,
// endpoint descriptor, USB spec 9.6.6, page 269-271, Table 9-13
7, // bLength
5, // bDescriptorType
DEBUG_TX_ENDPOINT | 0x80, // bEndpointAddress
0x03, // bmAttributes (0x03=intr)
DEBUG_TX_SIZE, 0, // wMaxPacketSize
1 // bInterval
};
// If you're desperate for a little extra code memory, these strings
// can be completely removed if iManufacturer, iProduct, iSerialNumber
// in the device desciptor are changed to zeros.
struct usb_string_descriptor_struct {
uint8_t bLength;
uint8_t bDescriptorType;
int16_t wString[];
};
static struct usb_string_descriptor_struct PROGMEM string0 = {
4,
3,
{0x0409}
};
static struct usb_string_descriptor_struct PROGMEM string1 = {
sizeof(STR_MANUFACTURER),
3,
STR_MANUFACTURER
};
static struct usb_string_descriptor_struct PROGMEM string2 = {
sizeof(STR_PRODUCT),
3,
STR_PRODUCT
};
// This table defines which descriptor data is sent for each specific
// request from the host (in wValue and wIndex).
static struct descriptor_list_struct {
uint16_t wValue;
uint16_t wIndex;
const uint8_t *addr;
uint8_t length;
} PROGMEM descriptor_list[] = {
{0x0100, 0x0000, device_descriptor, sizeof(device_descriptor)},
{0x0200, 0x0000, config1_descriptor, sizeof(config1_descriptor)},
{0x2200, KEYBOARD_INTERFACE, keyboard_hid_report_desc, sizeof(keyboard_hid_report_desc)},
{0x2100, KEYBOARD_INTERFACE, config1_descriptor+KEYBOARD_HID_DESC_OFFSET, 9},
{0x2200, DEBUG_INTERFACE, debug_hid_report_desc, sizeof(debug_hid_report_desc)},
{0x2100, DEBUG_INTERFACE, config1_descriptor+DEBUG_HID_DESC_OFFSET, 9},
{0x0300, 0x0000, (const uint8_t *)&string0, 4},
{0x0301, 0x0409, (const uint8_t *)&string1, sizeof(STR_MANUFACTURER)},
{0x0302, 0x0409, (const uint8_t *)&string2, sizeof(STR_PRODUCT)}
};
#define NUM_DESC_LIST (sizeof(descriptor_list)/sizeof(struct descriptor_list_struct))
/**************************************************************************
*
* Variables - these are the only non-stack RAM usage
*
**************************************************************************/
// zero when we are not configured, non-zero when enumerated
static volatile uint8_t usb_configuration=0;
// the time remaining before we transmit any partially full
// packet, or send a zero length packet.
static volatile uint8_t debug_flush_timer=0;
// which modifier keys are currently pressed
// 1=left ctrl, 2=left shift, 4=left alt, 8=left gui
// 16=right ctrl, 32=right shift, 64=right alt, 128=right gui
uint8_t keyboard_modifier_keys=0;
// which keys are currently pressed, up to 6 keys may be down at once
uint8_t keyboard_keys[6]={0,0,0,0,0,0};
// protocol setting from the host. We use exactly the same report
// either way, so this variable only stores the setting since we
// are required to be able to report which setting is in use.
static uint8_t keyboard_protocol=1;
// the idle configuration, how often we send the report to the
// host (ms * 4) even when it hasn't changed
static uint8_t keyboard_idle_config=125;
// count until idle timeout
static uint8_t keyboard_idle_count=0;
// 1=num lock, 2=caps lock, 4=scroll lock, 8=compose, 16=kana
volatile uint8_t keyboard_leds=0;
/**************************************************************************
*
* Public Functions - these are the API intended for the user
*
**************************************************************************/
// initialize USB
void usb_init(void)
{
HW_CONFIG();
USB_FREEZE(); // enable USB
PLL_CONFIG(); // config PLL
while (!(PLLCSR & (1<<PLOCK))) ; // wait for PLL lock
USB_CONFIG(); // start USB clock
UDCON = 0; // enable attach resistor
usb_configuration = 0;
UDIEN = (1<<EORSTE)|(1<<SOFE);
sei();
}
// return 0 if the USB is not configured, or the configuration
// number selected by the HOST
uint8_t usb_configured(void)
{
return usb_configuration;
}
// perform a single keystroke
int8_t usb_keyboard_press(uint8_t key, uint8_t modifier)
{
int8_t r;
keyboard_modifier_keys = modifier;
keyboard_keys[0] = key;
r = usb_keyboard_send();
if (r) return r;
keyboard_modifier_keys = 0;
keyboard_keys[0] = 0;
return usb_keyboard_send();
}
// send the contents of keyboard_keys and keyboard_modifier_keys
int8_t usb_keyboard_send(void)
{
uint8_t i, intr_state, timeout;
if (!usb_configuration) return -1;
intr_state = SREG;
cli();
UENUM = KEYBOARD_ENDPOINT;
timeout = UDFNUML + 50;
while (1) {
// are we ready to transmit?
if (UEINTX & (1<<RWAL)) break;
SREG = intr_state;
// has the USB gone offline?
if (!usb_configuration) return -1;
// have we waited too long?
if (UDFNUML == timeout) return -1;
// get ready to try checking again
intr_state = SREG;
cli();
UENUM = KEYBOARD_ENDPOINT;
}
UEDATX = keyboard_modifier_keys;
UEDATX = 0;
for (i=0; i<6; i++) {
UEDATX = keyboard_keys[i];
}
UEINTX = 0x3A;
keyboard_idle_count = 0;
SREG = intr_state;
return 0;
}
// transmit a character. 0 returned on success, -1 on error
int8_t usb_debug_putchar(uint8_t c)
{
static uint8_t previous_timeout=0;
uint8_t timeout, intr_state;
// if we're not online (enumerated and configured), error
if (!usb_configuration) return -1;
// interrupts are disabled so these functions can be
// used from the main program or interrupt context,
// even both in the same program!
intr_state = SREG;
cli();
UENUM = DEBUG_TX_ENDPOINT;
// if we gave up due to timeout before, don't wait again
if (previous_timeout) {
if (!(UEINTX & (1<<RWAL))) {
SREG = intr_state;
return -1;
}
previous_timeout = 0;
}
// wait for the FIFO to be ready to accept data
timeout = UDFNUML + 4;
while (1) {
// are we ready to transmit?
if (UEINTX & (1<<RWAL)) break;
SREG = intr_state;
// have we waited too long?
if (UDFNUML == timeout) {
previous_timeout = 1;
return -1;
}
// has the USB gone offline?
if (!usb_configuration) return -1;
// get ready to try checking again
intr_state = SREG;
cli();
UENUM = DEBUG_TX_ENDPOINT;
}
// actually write the byte into the FIFO
UEDATX = c;
// if this completed a packet, transmit it now!
if (!(UEINTX & (1<<RWAL))) {
UEINTX = 0x3A;
debug_flush_timer = 0;
} else {
debug_flush_timer = 2;
}
SREG = intr_state;
return 0;
}
// immediately transmit any buffered output.
void usb_debug_flush_output(void)
{
uint8_t intr_state;
intr_state = SREG;
cli();
if (debug_flush_timer) {
UENUM = DEBUG_TX_ENDPOINT;
while ((UEINTX & (1<<RWAL))) {
UEDATX = 0;
}
UEINTX = 0x3A;
debug_flush_timer = 0;
}
SREG = intr_state;
}
/**************************************************************************
*
* Private Functions - not intended for general user consumption....
*
**************************************************************************/
// USB Device Interrupt - handle all device-level events
// the transmit buffer flushing is triggered by the start of frame
//
ISR(USB_GEN_vect)
{
uint8_t intbits, t, i;
static uint8_t div4=0;
intbits = UDINT;
UDINT = 0;
if (intbits & (1<<EORSTI)) {
UENUM = 0;
UECONX = 1;
UECFG0X = EP_TYPE_CONTROL;
UECFG1X = EP_SIZE(ENDPOINT0_SIZE) | EP_SINGLE_BUFFER;
UEIENX = (1<<RXSTPE);
usb_configuration = 0;
}
if ((intbits & (1<<SOFI)) && usb_configuration) {
t = debug_flush_timer;
if (t) {
debug_flush_timer = -- t;
if (!t) {
UENUM = DEBUG_TX_ENDPOINT;
while ((UEINTX & (1<<RWAL))) {
UEDATX = 0;
}
UEINTX = 0x3A;
}
}
if (keyboard_idle_config && (++div4 & 3) == 0) {
UENUM = KEYBOARD_ENDPOINT;
if (UEINTX & (1<<RWAL)) {
keyboard_idle_count++;
if (keyboard_idle_count == keyboard_idle_config) {
keyboard_idle_count = 0;
UEDATX = keyboard_modifier_keys;
UEDATX = 0;
for (i=0; i<6; i++) {
UEDATX = keyboard_keys[i];
}
UEINTX = 0x3A;
}
}
}
}
}
// Misc functions to wait for ready and send/receive packets
static inline void usb_wait_in_ready(void)
{
while (!(UEINTX & (1<<TXINI))) ;
}
static inline void usb_send_in(void)
{
UEINTX = ~(1<<TXINI);
}
static inline void usb_wait_receive_out(void)
{
while (!(UEINTX & (1<<RXOUTI))) ;
}
static inline void usb_ack_out(void)
{
UEINTX = ~(1<<RXOUTI);
}
// USB Endpoint Interrupt - endpoint 0 is handled here. The
// other endpoints are manipulated by the user-callable
// functions, and the start-of-frame interrupt.
//
ISR(USB_COM_vect)
{
uint8_t intbits;
const uint8_t *list;
const uint8_t *cfg;
uint8_t i, n, len, en;
uint8_t bmRequestType;
uint8_t bRequest;
uint16_t wValue;
uint16_t wIndex;
uint16_t wLength;
uint16_t desc_val;
const uint8_t *desc_addr;
uint8_t desc_length;
UENUM = 0;
intbits = UEINTX;
if (intbits & (1<<RXSTPI)) {
bmRequestType = UEDATX;
bRequest = UEDATX;
wValue = UEDATX;
wValue |= (UEDATX << 8);
wIndex = UEDATX;
wIndex |= (UEDATX << 8);
wLength = UEDATX;
wLength |= (UEDATX << 8);
UEINTX = ~((1<<RXSTPI) | (1<<RXOUTI) | (1<<TXINI));
if (bRequest == GET_DESCRIPTOR) {
list = (const uint8_t *)descriptor_list;
for (i=0; ; i++) {
if (i >= NUM_DESC_LIST) {
UECONX = (1<<STALLRQ)|(1<<EPEN); //stall
return;
}
desc_val = pgm_read_word(list);
if (desc_val != wValue) {
list += sizeof(struct descriptor_list_struct);
continue;
}
list += 2;
desc_val = pgm_read_word(list);
if (desc_val != wIndex) {
list += sizeof(struct descriptor_list_struct)-2;
continue;
}
list += 2;
desc_addr = (const uint8_t *)pgm_read_word(list);
list += 2;
desc_length = pgm_read_byte(list);
break;
}
len = (wLength < 256) ? wLength : 255;
if (len > desc_length) len = desc_length;
do {
// wait for host ready for IN packet
do {
i = UEINTX;
} while (!(i & ((1<<TXINI)|(1<<RXOUTI))));
if (i & (1<<RXOUTI)) return; // abort
// send IN packet
n = len < ENDPOINT0_SIZE ? len : ENDPOINT0_SIZE;
for (i = n; i; i--) {
UEDATX = pgm_read_byte(desc_addr++);
}
len -= n;
usb_send_in();
} while (len || n == ENDPOINT0_SIZE);
return;
}
if (bRequest == SET_ADDRESS) {
usb_send_in();
usb_wait_in_ready();
UDADDR = wValue | (1<<ADDEN);
return;
}
if (bRequest == SET_CONFIGURATION && bmRequestType == 0) {
usb_configuration = wValue;
usb_send_in();
cfg = endpoint_config_table;
for (i=1; i<5; i++) {
UENUM = i;
en = pgm_read_byte(cfg++);
UECONX = en;
if (en) {
UECFG0X = pgm_read_byte(cfg++);
UECFG1X = pgm_read_byte(cfg++);
}
}
UERST = 0x1E;
UERST = 0;
return;
}
if (bRequest == GET_CONFIGURATION && bmRequestType == 0x80) {
usb_wait_in_ready();
UEDATX = usb_configuration;
usb_send_in();
return;
}
if (bRequest == GET_STATUS) {
usb_wait_in_ready();
i = 0;
#ifdef SUPPORT_ENDPOINT_HALT
if (bmRequestType == 0x82) {
UENUM = wIndex;
if (UECONX & (1<<STALLRQ)) i = 1;
UENUM = 0;
}
#endif
UEDATX = i;
UEDATX = 0;
usb_send_in();
return;
}
#ifdef SUPPORT_ENDPOINT_HALT
if ((bRequest == CLEAR_FEATURE || bRequest == SET_FEATURE)
&& bmRequestType == 0x02 && wValue == 0) {
i = wIndex & 0x7F;
if (i >= 1 && i <= MAX_ENDPOINT) {
usb_send_in();
UENUM = i;
if (bRequest == SET_FEATURE) {
UECONX = (1<<STALLRQ)|(1<<EPEN);
} else {
UECONX = (1<<STALLRQC)|(1<<RSTDT)|(1<<EPEN);
UERST = (1 << i);
UERST = 0;
}
return;
}
}
#endif
if (wIndex == KEYBOARD_INTERFACE) {
if (bmRequestType == 0xA1) {
if (bRequest == HID_GET_REPORT) {
usb_wait_in_ready();
UEDATX = keyboard_modifier_keys;
UEDATX = 0;
for (i=0; i<6; i++) {
UEDATX = keyboard_keys[i];
}
usb_send_in();
return;
}
if (bRequest == HID_GET_IDLE) {
usb_wait_in_ready();
UEDATX = keyboard_idle_config;
usb_send_in();
return;
}
if (bRequest == HID_GET_PROTOCOL) {
usb_wait_in_ready();
UEDATX = keyboard_protocol;
usb_send_in();
return;
}
}
if (bmRequestType == 0x21) {
if (bRequest == HID_SET_REPORT) {
usb_wait_receive_out();
keyboard_leds = UEDATX;
usb_ack_out();
usb_send_in();
return;
}
if (bRequest == HID_SET_IDLE) {
keyboard_idle_config = (wValue >> 8);
keyboard_idle_count = 0;
//usb_wait_in_ready();
usb_send_in();
return;
}
if (bRequest == HID_SET_PROTOCOL) {
keyboard_protocol = wValue;
//usb_wait_in_ready();
usb_send_in();
return;
}
}
}
if (wIndex == DEBUG_INTERFACE) {
if (bRequest == HID_GET_REPORT && bmRequestType == 0xA1) {
len = wLength;
do {
// wait for host ready for IN packet
do {
i = UEINTX;
} while (!(i & ((1<<TXINI)|(1<<RXOUTI))));
if (i & (1<<RXOUTI)) return; // abort
// send IN packet
n = len < ENDPOINT0_SIZE ? len : ENDPOINT0_SIZE;
for (i = n; i; i--) {
UEDATX = 0;
}
len -= n;
usb_send_in();
} while (len || n == ENDPOINT0_SIZE);
return;
}
}
}
UECONX = (1<<STALLRQ) | (1<<EPEN); // stall
}

203
usb_keyboard_debug.h Normal file
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#ifndef usb_serial_h__
#define usb_serial_h__
#include <stdint.h>
void usb_init(void); // initialize everything
uint8_t usb_configured(void); // is the USB port configured
int8_t usb_keyboard_press(uint8_t key, uint8_t modifier);
int8_t usb_keyboard_send(void);
extern uint8_t keyboard_modifier_keys;
extern uint8_t keyboard_keys[6];
extern volatile uint8_t keyboard_leds;
int8_t usb_debug_putchar(uint8_t c); // transmit a character
void usb_debug_flush_output(void); // immediately transmit any buffered output
#define USB_DEBUG_HID
#define KEY_CTRL 0x01
#define KEY_SHIFT 0x02
#define KEY_ALT 0x04
#define KEY_GUI 0x08
#define KEY_LEFT_CTRL 0x01
#define KEY_LEFT_SHIFT 0x02
#define KEY_LEFT_ALT 0x04
#define KEY_LEFT_GUI 0x08
#define KEY_RIGHT_CTRL 0x10
#define KEY_RIGHT_SHIFT 0x20
#define KEY_RIGHT_ALT 0x40
#define KEY_RIGHT_GUI 0x80
#define KEY_A 4
#define KEY_B 5
#define KEY_C 6
#define KEY_D 7
#define KEY_E 8
#define KEY_F 9
#define KEY_G 10
#define KEY_H 11
#define KEY_I 12
#define KEY_J 13
#define KEY_K 14
#define KEY_L 15
#define KEY_M 16
#define KEY_N 17
#define KEY_O 18
#define KEY_P 19
#define KEY_Q 20
#define KEY_R 21
#define KEY_S 22
#define KEY_T 23
#define KEY_U 24
#define KEY_V 25
#define KEY_W 26
#define KEY_X 27
#define KEY_Y 28
#define KEY_Z 29
#define KEY_1 30
#define KEY_2 31
#define KEY_3 32
#define KEY_4 33
#define KEY_5 34
#define KEY_6 35
#define KEY_7 36
#define KEY_8 37
#define KEY_9 38
#define KEY_0 39
#define KEY_ENTER 40
#define KEY_ESC 41
#define KEY_BACKSPACE 42
#define KEY_TAB 43
#define KEY_SPACE 44
#define KEY_MINUS 45
#define KEY_EQUAL 46
#define KEY_LEFT_BRACE 47
#define KEY_RIGHT_BRACE 48
#define KEY_BACKSLASH 49
#define KEY_NUMBER 50
#define KEY_SEMICOLON 51
#define KEY_QUOTE 52
#define KEY_TILDE 53
#define KEY_COMMA 54
#define KEY_PERIOD 55
#define KEY_SLASH 56
#define KEY_CAPS_LOCK 57
#define KEY_F1 58
#define KEY_F2 59
#define KEY_F3 60
#define KEY_F4 61
#define KEY_F5 62
#define KEY_F6 63
#define KEY_F7 64
#define KEY_F8 65
#define KEY_F9 66
#define KEY_F10 67
#define KEY_F11 68
#define KEY_F12 69
#define KEY_PRINTSCREEN 70
#define KEY_SCROLL_LOCK 71
#define KEY_PAUSE 72
#define KEY_INSERT 73
#define KEY_HOME 74
#define KEY_PAGE_UP 75
#define KEY_DELETE 76
#define KEY_END 77
#define KEY_PAGE_DOWN 78
#define KEY_RIGHT 79
#define KEY_LEFT 80
#define KEY_DOWN 81
#define KEY_UP 82
#define KEY_NUM_LOCK 83
#define KEYPAD_SLASH 84
#define KEYPAD_ASTERIX 85
#define KEYPAD_MINUS 86
#define KEYPAD_PLUS 87
#define KEYPAD_ENTER 88
#define KEYPAD_1 89
#define KEYPAD_2 90
#define KEYPAD_3 91
#define KEYPAD_4 92
#define KEYPAD_5 93
#define KEYPAD_6 94
#define KEYPAD_7 95
#define KEYPAD_8 96
#define KEYPAD_9 97
#define KEYPAD_0 98
#define KEYPAD_PERIOD 99
// Everything below this point is only intended for usb_serial.c
#ifdef USB_SERIAL_PRIVATE_INCLUDE
#include <avr/io.h>
#include <avr/pgmspace.h>
#include <avr/interrupt.h>
#define EP_TYPE_CONTROL 0x00
#define EP_TYPE_BULK_IN 0x81
#define EP_TYPE_BULK_OUT 0x80
#define EP_TYPE_INTERRUPT_IN 0xC1
#define EP_TYPE_INTERRUPT_OUT 0xC0
#define EP_TYPE_ISOCHRONOUS_IN 0x41
#define EP_TYPE_ISOCHRONOUS_OUT 0x40
#define EP_SINGLE_BUFFER 0x02
#define EP_DOUBLE_BUFFER 0x06
#define EP_SIZE(s) ((s) == 64 ? 0x30 : \
((s) == 32 ? 0x20 : \
((s) == 16 ? 0x10 : \
0x00)))
#define MAX_ENDPOINT 4
#define LSB(n) (n & 255)
#define MSB(n) ((n >> 8) & 255)
#if defined(__AVR_AT90USB162__)
#define HW_CONFIG()
#define PLL_CONFIG() (PLLCSR = ((1<<PLLE)|(1<<PLLP0)))
#define USB_CONFIG() (USBCON = (1<<USBE))
#define USB_FREEZE() (USBCON = ((1<<USBE)|(1<<FRZCLK)))
#elif defined(__AVR_ATmega32U4__)
#define HW_CONFIG() (UHWCON = 0x01)
#define PLL_CONFIG() (PLLCSR = 0x12)
#define USB_CONFIG() (USBCON = ((1<<USBE)|(1<<OTGPADE)))
#define USB_FREEZE() (USBCON = ((1<<USBE)|(1<<FRZCLK)))
#elif defined(__AVR_AT90USB646__)
#define HW_CONFIG() (UHWCON = 0x81)
#define PLL_CONFIG() (PLLCSR = 0x1A)
#define USB_CONFIG() (USBCON = ((1<<USBE)|(1<<OTGPADE)))
#define USB_FREEZE() (USBCON = ((1<<USBE)|(1<<FRZCLK)))
#elif defined(__AVR_AT90USB1286__)
#define HW_CONFIG() (UHWCON = 0x81)
#define PLL_CONFIG() (PLLCSR = 0x16)
#define USB_CONFIG() (USBCON = ((1<<USBE)|(1<<OTGPADE)))
#define USB_FREEZE() (USBCON = ((1<<USBE)|(1<<FRZCLK)))
#endif
// standard control endpoint request types
#define GET_STATUS 0
#define CLEAR_FEATURE 1
#define SET_FEATURE 3
#define SET_ADDRESS 5
#define GET_DESCRIPTOR 6
#define GET_CONFIGURATION 8
#define SET_CONFIGURATION 9
#define GET_INTERFACE 10
#define SET_INTERFACE 11
// HID (human interface device)
#define HID_GET_REPORT 1
#define HID_GET_IDLE 2
#define HID_GET_PROTOCOL 3
#define HID_SET_REPORT 9
#define HID_SET_IDLE 10
#define HID_SET_PROTOCOL 11
// CDC (communication class device)
#define CDC_SET_LINE_CODING 0x20
#define CDC_GET_LINE_CODING 0x21
#define CDC_SET_CONTROL_LINE_STATE 0x22
#endif
#endif