X-Git-Url: https://git.cryptolib.org/?p=labortage2013badge.git;a=blobdiff_plain;f=firmware%2Fmain.c;h=5bcb9345f1a0bb06390884dde38c1f7d00d5f4f7;hp=20bf8c09e592f664893c6b0b9a42b27de48427db;hb=9774c6cbab2971904929c1ad28c34664b355c3f9;hpb=06016b0f48e8407fdc6000735d310b84fd1fd0bc diff --git a/firmware/main.c b/firmware/main.c index 20bf8c0..5bcb934 100644 --- a/firmware/main.c +++ b/firmware/main.c @@ -1,10 +1,10 @@ /* Name: main.c - * Project: hid-custom-rq example - * Author: Christian Starkjohann - * Creation Date: 2008-04-07 + * Project: labortage-2013-badge + * Author: bg (bg@das-labor.org) + * Creation Date: 2013-10-16 * Tabsize: 4 - * Copyright: (c) 2008 by OBJECTIVE DEVELOPMENT Software GmbH - * License: GNU GPL v2 (see License.txt), GNU GPL v3 or proprietary (CommercialLicense.txt) + * Copyright: (c) 2008 by OBJECTIVE DEVELOPMENT Software GmbH, (c) Daniel Otte + * License: GNU GPL v3 * This Revision: $Id: main.c 692 2008-11-07 15:07:40Z cs $ */ @@ -13,16 +13,13 @@ This example should run on most AVRs with only little changes. No special hardware resources except INT0 are used. You may have to change usbconfig.h for different I/O pins for USB. Please note that USB D+ must be the INT0 pin, or at least be connected to INT0 as well. -We assume that an LED is connected to port B bit 0. If you connect it to a -different port or bit, change the macros below: */ -#define LED_PORT_DDR DDRB -#define LED_PORT_OUTPUT PORTB -#define R_BIT 4 -#define G_BIT 3 -#define B_BIT 1 + #define BUTTON_PIN 4 +#define SIMPLE_COUNTER 1 +#define NO_CHECK 1 + #include #include #include @@ -35,302 +32,357 @@ different port or bit, change the macros below: #include /* required by usbdrv.h */ #include "usbdrv.h" -#include "oddebug.h" /* This is also an example for using debug macros */ #include "requests.h" /* The custom request numbers we use */ -#include "special_functions.h" - -void update_pwm(void); +#include "hotp.h" +#if !SIMPLE_COUNTER +#include "percnt2.h" +#endif +#include "usb_keyboard_codes.h" /* ------------------------------------------------------------------------- */ /* ----------------------------- USB interface ----------------------------- */ /* ------------------------------------------------------------------------- */ -const PROGMEM char usbHidReportDescriptor[35] = { /* USB report descriptor */ - 0x05, 0x01, // USAGE_PAGE (Generic Desktop) - 0x09, 0x06, // USAGE (Keyboard) - 0xa1, 0x01, // COLLECTION (Application) - 0x05, 0x07, // USAGE_PAGE (Keyboard) - 0x19, 0xe0, // USAGE_MINIMUM (Keyboard LeftControl) - 0x29, 0xe7, // USAGE_MAXIMUM (Keyboard Right GUI) - 0x15, 0x00, // LOGICAL_MINIMUM (0) - 0x25, 0x01, // LOGICAL_MAXIMUM (1) - 0x75, 0x01, // REPORT_SIZE (1) - 0x95, 0x08, // REPORT_COUNT (8) - 0x81, 0x02, // INPUT (Data,Var,Abs) - 0x95, 0x01, // REPORT_COUNT (1) - 0x75, 0x08, // REPORT_SIZE (8) - 0x25, 0x65, // LOGICAL_MAXIMUM (101) - 0x19, 0x00, // USAGE_MINIMUM (Reserved (no event indicated)) - 0x29, 0x65, // USAGE_MAXIMUM (Keyboard Application) - 0x81, 0x00, // INPUT (Data,Ary,Abs) - 0xc0 // END_COLLECTION + +#define STATE_WAIT 0 +#define STATE_SEND_KEY 1 +#define STATE_RELEASE_KEY 2 +#define STATE_NEXT 3 + +PROGMEM const char usbHidReportDescriptor[USB_CFG_HID_REPORT_DESCRIPTOR_LENGTH] = { + 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 (Keyboard)(Key Codes) */ + 0x19, 0xe0, /* USAGE_MINIMUM (Keyboard LeftControl)(224) */ + 0x29, 0xe7, /* USAGE_MAXIMUM (Keyboard Right GUI)(231) */ + 0x15, 0x00, /* LOGICAL_MINIMUM (0) */ + 0x25, 0x01, /* LOGICAL_MAXIMUM (1) */ + 0x81, 0x02, /* INPUT (Data,Var,Abs) ; Modifier byte */ + 0x95, 0x01, /* REPORT_COUNT (1) */ + 0x75, 0x08, /* REPORT_SIZE (8) */ + 0x81, 0x03, /* INPUT (Cnst,Var,Abs) ; Reserved byte */ + 0x95, 0x05, /* REPORT_COUNT (5) */ + 0x75, 0x01, /* REPORT_SIZE (1) */ + 0x05, 0x08, /* USAGE_PAGE (LEDs) */ + 0x19, 0x01, /* USAGE_MINIMUM (Num Lock) */ + 0x29, 0x05, /* USAGE_MAXIMUM (Kana) */ + 0x91, 0x02, /* OUTPUT (Data,Var,Abs) ; LED report */ + 0x95, 0x01, /* REPORT_COUNT (1) */ + 0x75, 0x03, /* REPORT_SIZE (3) */ + 0x91, 0x03, /* OUTPUT (Cnst,Var,Abs) ; LED report padding */ + 0x95, 0x06, /* REPORT_COUNT (6) */ + 0x75, 0x08, /* REPORT_SIZE (8) */ + 0x15, 0x00, /* LOGICAL_MINIMUM (0) */ + 0x25, 0x65, /* LOGICAL_MAXIMUM (101) */ + 0x05, 0x07, /* USAGE_PAGE (Keyboard)(Key Codes) */ + 0x19, 0x00, /* USAGE_MINIMUM (Reserved (no event indicated))(0) */ + 0x29, 0x65, /* USAGE_MAXIMUM (Keyboard Application)(101) */ + 0x81, 0x00, /* INPUT (Data,Ary,Abs) */ + 0xc0 /* END_COLLECTION */ }; -/* We use a simplifed keyboard report descriptor which does not support the - * boot protocol. We don't allow setting status LEDs and we only allow one - * simultaneous key press (except modifiers). We can therefore use short - * 2 byte input reports. - * The report descriptor has been created with usb.org's "HID Descriptor Tool" - * which can be downloaded from http://www.usb.org/developers/hidpage/. - * Redundant entries (such as LOGICAL_MINIMUM and USAGE_PAGE) have been omitted - * for the second INPUT item. - */ -/* Keyboard usage values, see usb.org's HID-usage-tables document, chapter - * 10 Keyboard/Keypad Page for more codes. - */ -#define MOD_CONTROL_LEFT (1<<0) -#define MOD_SHIFT_LEFT (1<<1) -#define MOD_ALT_LEFT (1<<2) -#define MOD_GUI_LEFT (1<<3) -#define MOD_CONTROL_RIGHT (1<<4) -#define MOD_SHIFT_RIGHT (1<<5) -#define MOD_ALT_RIGHT (1<<6) -#define MOD_GUI_RIGHT (1<<7) - -#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_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 - -union { - struct { - uint16_t red; - uint16_t green; - uint16_t blue; - } name; - uint16_t idx[3]; -} color; +static uint16_t secret_length_ee EEMEM = 0; +static uint8_t secret_ee[32] EEMEM; +static uint8_t reset_counter_ee EEMEM = 0; +static uint8_t digits_ee EEMEM = 8; + +#if SIMPLE_COUNTER +static uint32_t counter_ee EEMEM = 0; +#endif + +static uint8_t dbg_buffer[8]; +static uint8_t secret[32]; +static uint16_t secret_length_b; +static char token[10]; #define UNI_BUFFER_SIZE 16 -static union { +static union __attribute__((packed)) { uint8_t w8[UNI_BUFFER_SIZE]; uint16_t w16[UNI_BUFFER_SIZE/2]; uint32_t w32[UNI_BUFFER_SIZE/4]; void* ptr[UNI_BUFFER_SIZE/sizeof(void*)]; } uni_buffer; -static uint8_t uni_buffer_fill; static uint8_t current_command; -static uchar reportBuffer[2]; /* buffer for HID reports */ -static uchar idleRate; /* in 4 ms units */ +typedef struct __attribute__((packed)) { + uint8_t modifier; + uint8_t reserved; + uint8_t keycode[6]; +} keyboard_report_t; -static bool keyDidChange = false; +static keyboard_report_t keyboard_report; /* report sent to the host */ +static uchar idleRate; /* in 4 ms units */ +static uchar key_state = STATE_WAIT; +volatile static uchar LED_state = 0xff; /* ------------------------------------------------------------------------- */ +static +void memory_clean(void) { + memset(secret, 0, 32); + secret_length_b = 0; +} + +static +uint8_t secret_set(void){ +#if !NO_CHECK + uint8_t r; + union { + uint8_t w8[32]; + uint16_t w16[16]; + } read_back; +#endif + const uint8_t length_B = (secret_length_b + 7) / 8; + + eeprom_busy_wait(); + eeprom_write_block(secret, secret_ee, length_B); +#if !NO_CHECK + eeprom_busy_wait(); + eeprom_read_block(read_back.w8, secret_ee, length_B); + r = memcmp(secret, read_back.w8, length_B); + memory_clean(); + memset(read_back.w8, 0, 32); + if (r) { + return 1; + } +#endif + eeprom_busy_wait(); + eeprom_write_word(&secret_length_ee, secret_length_b); +#if !NO_CHECK + eeprom_busy_wait(); + r = eeprom_read_word(&secret_length_ee) == secret_length_b; + memory_clean(); + *read_back.w16 = 0; + if (!r) { + return 1; + } +#else + memory_clean(); +#endif -uint8_t read_button(void){ - uint8_t t,v=0; - t = DDRB; - DDRB &= ~(1<>= BUTTON_PIN; - v &= 1; - v ^= 1; - return v; + return 0; } -void init_temperature_sensor(void){ - ADMUX = 0x8F; - ADCSRA = 0x87; +static +void counter_inc(void){ +#if SIMPLE_COUNTER + uint32_t t; + eeprom_busy_wait(); + t = eeprom_read_dword(&counter_ee); + eeprom_busy_wait(); + eeprom_write_dword(&counter_ee, t + 1); +#else + percnt_inc(0); +#endif } -uint16_t read_temperture_sensor(void){ - ADCSRA |= 0x40; - while(ADCSRA & 0x40) - ; - return ADC; +static +void counter_reset(void) { + uint8_t reset_counter; + eeprom_busy_wait(); + reset_counter = eeprom_read_byte(&reset_counter_ee); +#if SIMPLE_COUNTER + eeprom_busy_wait(); + eeprom_write_dword(&counter_ee, 0); +#else + percnt_reset(0); +#endif + eeprom_busy_wait(); + eeprom_write_byte(&reset_counter_ee, reset_counter + 1); } -#if 0 -uchar usbFunctionSetup(uchar data[8]) -{ -usbRequest_t *rq = (void *)data; - - usbMsgPtr = reportBuffer; - if((rq->bmRequestType & USBRQ_TYPE_MASK) == USBRQ_TYPE_CLASS){ /* class request type */ - if(rq->bRequest == USBRQ_HID_GET_REPORT){ /* wValue: ReportType (highbyte), ReportID (lowbyte) */ - /* we only have one report type, so don't look at wValue */ - buildReport(keyPressed()); - return sizeof(reportBuffer); - }else if(rq->bRequest == USBRQ_HID_GET_IDLE){ - usbMsgPtr = &idleRate; - return 1; - }else if(rq->bRequest == USBRQ_HID_SET_IDLE){ - idleRate = rq->wValue.bytes[1]; - } - }else{ - /* no vendor specific requests implemented */ +static +void counter_init(void) { +#if !SIMPLE_COUNTER + eeprom_busy_wait(); + if (eeprom_read_byte(&reset_counter_ee) == 0) { + counter_reset(); } - return 0; + percnt_init(0); +#endif } + +static +void token_generate(void) { + counter_inc(); + eeprom_busy_wait(); + eeprom_read_block(secret, secret_ee, 32); + eeprom_busy_wait(); +#if SIMPLE_COUNTER + hotp(token, secret, eeprom_read_word(&secret_length_ee), eeprom_read_dword(&counter_ee), eeprom_read_byte(&digits_ee)); +#else + hotp(token, secret, eeprom_read_word(&secret_length_ee), percnt_get(0), eeprom_read_byte(&digits_ee)); #endif + memory_clean(); +} + + +static +void buildReport(uchar send_key) { + keyboard_report.modifier = 0; + + switch (send_key) { + case '1' ... '9': + keyboard_report.keycode[0] = KEY_1 + (send_key-'1'); + break; + case '0': + keyboard_report.keycode[0] = KEY_0; + break; + default: + keyboard_report.keycode[0] = 0; + } +} + +static +int8_t button_get_debounced(volatile uint8_t debounce_count) { + uint8_t v; + v = PINB & _BV(BUTTON_PIN); + while (debounce_count-- && v == (PINB & _BV(BUTTON_PIN))) { + ; + } + if (debounce_count) { + return -1; + } + return v ? 0 : 1; +} usbMsgLen_t usbFunctionSetup(uchar data[8]) { usbRequest_t *rq = (usbRequest_t *)data; if ((rq->bmRequestType & USBRQ_TYPE_MASK) == USBRQ_TYPE_CLASS) { /* class request type */ - color.name.red = 13; - if (rq->bRequest == USBRQ_HID_GET_REPORT){ /* wValue: ReportType (highbyte), ReportID (lowbyte) */ - /* we only have one report type, so don't look at wValue */ - if (color.name.red == 133) { - color.name.red = 23; - usbMsgPtr = reportBuffer; - reportBuffer[0] = 0; - reportBuffer[1] = KEY_X; + switch(rq->bRequest) { + case USBRQ_HID_GET_REPORT: /* send "no keys pressed" if asked here */ + /* wValue: ReportType (highbyte), ReportID (lowbyte) */ + usbMsgPtr = (void *)&keyboard_report; /* we only have this one */ + keyboard_report.modifier = 0; + keyboard_report.keycode[0] = 0; + return sizeof(keyboard_report); + case USBRQ_HID_SET_REPORT: /* if wLength == 1, should be LED state */ + if (rq->wLength.word == 1) { + current_command = LED_WRITE; + return USB_NO_MSG; } - return sizeof(reportBuffer); - } else if (rq->bRequest == USBRQ_HID_GET_IDLE) { + return 0; + case USBRQ_HID_GET_IDLE: /* send idle rate to PC as required by spec */ usbMsgPtr = &idleRate; return 1; - }else if (rq->bRequest == USBRQ_HID_SET_IDLE) { - usbMsgPtr = reportBuffer; + case USBRQ_HID_SET_IDLE: /* save idle rate as required by spec */ idleRate = rq->wValue.bytes[1]; + return 0; } } if ((rq->bmRequestType & USBRQ_TYPE_MASK) == USBRQ_TYPE_VENDOR) { current_command = rq->bRequest; + usbMsgPtr = uni_buffer.w8; switch(rq->bRequest) { - case CUSTOM_RQ_SET_RGB: + case CUSTOM_RQ_SET_SECRET: + secret_length_b = rq->wValue.word; + if (secret_length_b > 256) { + secret_length_b = 256; + } + uni_buffer.w8[0] = 0; + return USB_NO_MSG; + case CUSTOM_RQ_INC_COUNTER: + counter_inc(); + return 0; + case CUSTOM_RQ_GET_COUNTER: +#if SIMPLE_COUNTER + eeprom_busy_wait(); + uni_buffer.w32[0] = eeprom_read_dword(&counter_ee); +#else + uni_buffer.w32[0] = percnt_get(0); +#endif + return 4; + case CUSTOM_RQ_RESET_COUNTER: + counter_reset(); + return 0; + case CUSTOM_RQ_GET_RESET_COUNTER: + eeprom_busy_wait(); + uni_buffer.w8[0] = eeprom_read_byte(&reset_counter_ee); + return 1; + case CUSTOM_RQ_SET_DIGITS: + if (rq->wValue.bytes[0] < 6) { + rq->wValue.bytes[0] = 6; + } + if (rq->wValue.bytes[0] > 9) { + rq->wValue.bytes[0] = 9; + } + eeprom_busy_wait(); + eeprom_write_byte(&digits_ee, rq->wValue.bytes[0]); + return 0; + case CUSTOM_RQ_GET_DIGITS: + eeprom_busy_wait(); + uni_buffer.w8[0] = eeprom_read_byte(&digits_ee); + return 1; + case CUSTOM_RQ_GET_TOKEN: + token_generate(); + usbMsgPtr = (usbMsgPtr_t)token; + return strlen(token); + case CUSTOM_RQ_PRESS_BUTTON: + key_state = STATE_SEND_KEY; + return 0; + case CUSTOM_RQ_CLR_DBG: + memset(dbg_buffer, 0, sizeof(dbg_buffer)); + return 0; + case CUSTOM_RQ_SET_DBG: return USB_NO_MSG; - case CUSTOM_RQ_GET_RGB:{ - usbMsgLen_t len=6; - if(len>rq->wLength.word){ + case CUSTOM_RQ_GET_DBG:{ + usbMsgLen_t len = 8; + if(len > rq->wLength.word){ len = rq->wLength.word; } - usbMsgPtr = (uchar*)color.idx; + usbMsgPtr = dbg_buffer; return len; } - case CUSTOM_RQ_READ_MEM: - usbMsgPtr = (uchar*)rq->wValue.word; - return rq->wLength.word; - case CUSTOM_RQ_WRITE_MEM: - case CUSTOM_RQ_EXEC_SPM: - uni_buffer_fill = 4; - uni_buffer.w16[0] = rq->wValue.word; - uni_buffer.w16[1] = rq->wLength.word; - return USB_NO_MSG; - case CUSTOM_RQ_READ_FLASH: - uni_buffer.w16[0] = rq->wValue.word; - uni_buffer.w16[1] = rq->wLength.word; - return USB_NO_MSG; case CUSTOM_RQ_RESET: soft_reset((uint8_t)(rq->wValue.word)); break; case CUSTOM_RQ_READ_BUTTON: - uni_buffer.w8[0] = read_button(); - usbMsgPtr = uni_buffer.w8; + uni_buffer.w8[0] = button_get_debounced(25); return 1; - case CUSTOM_RQ_READ_TMPSENS: - uni_buffer.w16[0] = read_temperture_sensor(); - usbMsgPtr = uni_buffer.w8; - return 2; } } return 0; /* default for not implemented requests: return no data back to host */ } + uchar usbFunctionWrite(uchar *data, uchar len) { switch(current_command){ - case CUSTOM_RQ_SET_RGB: - if(len!=6){ - return 1; + + case LED_WRITE: + if (data[0] != LED_state) + LED_state = data[0]; + return 1; /* Data read, not expecting more */ + case CUSTOM_RQ_SET_SECRET: + { + if (uni_buffer.w8[0] < (secret_length_b + 7) / 8) { + memcpy(&secret[uni_buffer.w8[0]], data, len); + uni_buffer.w8[0] += len; + } + if (uni_buffer.w8[0] >= (secret_length_b + 7) / 8) { + secret_set(); + return 1; + } + return 0; + } + case CUSTOM_RQ_SET_DBG: + if(len > sizeof(dbg_buffer)){ + len = sizeof(dbg_buffer); } - memcpy(color.idx, data, 6); - keyDidChange = true; + memcpy(dbg_buffer, data, len); return 1; - case CUSTOM_RQ_WRITE_MEM: - memcpy(uni_buffer.ptr[0], data, len); - uni_buffer.w16[0] += len; - return !(uni_buffer.w16[1] -= len); - case CUSTOM_RQ_EXEC_SPM: - if(uni_buffer_fill<8){ - uint8_t l = 8-uni_buffer_fill; - if(len8){ - memcpy(uni_buffer.ptr[0], data, len); - uni_buffer.w16[0] += len; - return 0; - }else{ - memcpy(&(uni_buffer.w8[uni_buffer_fill]), data, len); - exec_spm(uni_buffer.w16[2], uni_buffer.w16[3], uni_buffer.ptr[0], data, len); - return 1; - } default: return 1; } return 0; } uchar usbFunctionRead(uchar *data, uchar len){ - uchar ret=len; - switch(current_command){ - case CUSTOM_RQ_READ_FLASH: - while(len--){ - *data++ = pgm_read_byte((uni_buffer.w16[0])++); - } - return ret; - default: - break; - } return 0; } @@ -341,22 +393,22 @@ uchar trialValue = 0, optimumValue; int x, optimumDev, targetValue = (unsigned)(1499 * (double)F_CPU / 10.5e6 + 0.5); /* do a binary search: */ - do{ + do { OSCCAL = trialValue + step; - x = usbMeasureFrameLength(); // proportional to current real frequency - if(x < targetValue) // frequency still too low + x = usbMeasureFrameLength(); /* proportional to current real frequency */ + if(x < targetValue) /* frequency still too low */ trialValue += step; step >>= 1; - }while(step > 0); + } while(step > 0); /* We have a precision of +/- 1 for optimum OSCCAL here */ /* now do a neighborhood search for optimum value */ optimumValue = trialValue; - optimumDev = x; // this is certainly far away from optimum - for(OSCCAL = trialValue - 1; OSCCAL <= trialValue + 1; OSCCAL++){ + optimumDev = x; /* this is certainly far away from optimum */ + for (OSCCAL = trialValue - 1; OSCCAL <= trialValue + 1; OSCCAL++){ x = usbMeasureFrameLength() - targetValue; - if(x < 0) + if (x < 0) x = -x; - if(x < optimumDev){ + if (x < optimumDev) { optimumDev = x; optimumValue = OSCCAL; } @@ -367,18 +419,17 @@ int x, optimumDev, targetValue = (unsigned)(1499 * (double)F_CPU / 10.5e void usbEventResetReady(void) { - cli(); // usbMeasureFrameLength() counts CPU cycles, so disable interrupts. + cli(); /* usbMeasureFrameLength() counts CPU cycles, so disable interrupts. */ calibrateOscillator(); sei(); -// we never read the value from eeprom so this causes only degradation of eeprom -// eeprom_write_byte(0, OSCCAL); // store the calibrated value in EEPROM } /* ------------------------------------------------------------------------- */ int main(void) { - uchar i; + size_t idx = 0; + int8_t i = 0, last_stable_button_state = 0; wdt_enable(WDTO_1S); /* Even if you don't use the watchdog, turn it off here. On newer devices, @@ -389,33 +440,55 @@ int main(void) * additional hardware initialization. */ - init_temperature_sensor(); + DDRB &= ~_BV(BUTTON_PIN); /* make button pin input */ + PORTB |= _BV(BUTTON_PIN); /* turn on pull-up resistor */ + counter_init(); usbInit(); usbDeviceDisconnect(); /* enforce re-enumeration, do this while interrupts are disabled! */ - i = 0; - while(--i){ /* fake USB disconnect for > 250 ms */ + while(--i){ /* fake USB disconnect for ~512 ms */ wdt_reset(); - _delay_ms(1); + _delay_ms(2); } usbDeviceConnect(); - LED_PORT_DDR |= _BV(R_BIT) | _BV(G_BIT) | _BV(B_BIT); /* make the LED bit an output */ sei(); for(;;){ /* main event loop */ - // update_pwm(); - wdt_reset(); usbPoll(); - if(keyDidChange && usbInterruptIsReady()){ - keyDidChange = 0; - color.name.red = 42; - /* use last key and not current key status in order to avoid lost - changes in key status. */ - reportBuffer[0] = 0; - reportBuffer[1] = KEY_Y; - usbSetInterrupt(reportBuffer, sizeof(reportBuffer)); + + i = button_get_debounced(25); + if (i != -1) { + if (last_stable_button_state == 0 && i == 1) { + key_state = STATE_SEND_KEY; + } + last_stable_button_state = i; + } + + if(usbInterruptIsReady() && key_state != STATE_WAIT){ + switch(key_state) { + case STATE_SEND_KEY: + buildReport(token[idx]); + key_state = STATE_RELEASE_KEY; /* release next */ + break; + case STATE_RELEASE_KEY: + buildReport(0); + ++idx; + if (token[idx] == '\0') { + idx = 0; + key_state = STATE_WAIT; + } else { + key_state = STATE_SEND_KEY; + } + break; + default: + key_state = STATE_WAIT; /* should not happen */ + } + /* start sending */ + usbSetInterrupt((void *)&keyboard_report, sizeof(keyboard_report)); + } + } return 0; }