comparison: main.c
main.c
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| 1 /* Name: main.c | |
| 2 * Project: hid-data, example how to use HID for data transfer | |
| 3 * Author: Christian Starkjohann | |
| 4 * Creation Date: 2008-04-11 | |
| 5 * Tabsize: 4 | |
| 6 * Copyright: (c) 2008 by OBJECTIVE DEVELOPMENT Software GmbH | |
| 7 * License: GNU GPL v2 (see License.txt), GNU GPL v3 or proprietary (CommercialLicense.txt) | |
| 8 */ | |
| 9 | |
| 10 /* | |
| 11 This example should run on most AVRs with only little changes. No special | |
| 12 hardware resources except INT0 are used. You may have to change usbconfig.h for | |
| 13 different I/O pins for USB. Please note that USB D+ must be the INT0 pin, or | |
| 14 at least be connected to INT0 as well. | |
| 15 */ | |
| 16 | |
| 17 #include <avr/io.h> | |
| 18 #include <avr/wdt.h> | |
| 19 #include <avr/interrupt.h> /* for sei() */ | |
| 20 #include <util/delay.h> /* for _delay_ms() */ | |
| 21 #include <avr/eeprom.h> | |
| 22 | |
| 23 #include <avr/pgmspace.h> /* required by usbdrv.h */ | |
| 24 #include "usbdrv.h" | |
| 25 #include "oddebug.h" /* This is also an example for using debug macros */ | |
| 26 | |
| 27 /* ------------------------------------------------------------------------- */ | |
| 28 /* ----------------------------- USB interface ----------------------------- */ | |
| 29 /* ------------------------------------------------------------------------- */ | |
| 30 | |
| 31 PROGMEM const char usbHidReportDescriptor[22] = { /* USB report descriptor */ | |
| 32 0x06, 0x00, 0xff, // USAGE_PAGE (Generic Desktop) | |
| 33 0x09, 0x01, // USAGE (Vendor Usage 1) | |
| 34 0xa1, 0x01, // COLLECTION (Application) | |
| 35 0x15, 0x00, // LOGICAL_MINIMUM (0) | |
| 36 0x26, 0xff, 0x00, // LOGICAL_MAXIMUM (255) | |
| 37 0x75, 0x08, // REPORT_SIZE (8) | |
| 38 0x95, 0x80, // REPORT_COUNT (128) | |
| 39 0x09, 0x00, // USAGE (Undefined) | |
| 40 0xb2, 0x02, 0x01, // FEATURE (Data,Var,Abs,Buf) | |
| 41 0xc0 // END_COLLECTION | |
| 42 }; | |
| 43 /* Since we define only one feature report, we don't use report-IDs (which | |
| 44 * would be the first byte of the report). The entire report consists of 128 | |
| 45 * opaque data bytes. | |
| 46 */ | |
| 47 | |
| 48 /* The following variables store the status of the current data transfer */ | |
| 49 static uchar currentAddress; | |
| 50 static uchar bytesRemaining; | |
| 51 | |
| 52 /* ------------------------------------------------------------------------- */ | |
| 53 | |
| 54 /* usbFunctionRead() is called when the host requests a chunk of data from | |
| 55 * the device. For more information see the documentation in usbdrv/usbdrv.h. | |
| 56 */ | |
| 57 uchar usbFunctionRead(uchar *data, uchar len) | |
| 58 { | |
| 59 if(len > bytesRemaining) | |
| 60 len = bytesRemaining; | |
| 61 // eeprom_read_block(data, (uchar *)0 + currentAddress, len); | |
| 62 currentAddress += len; | |
| 63 bytesRemaining -= len; | |
| 64 return len; | |
| 65 } | |
| 66 /* usbFunctionWrite() is called when the host sends a chunk of data to the | |
| 67 * device. For more information see the documentation in usbdrv/usbdrv.h. | |
| 68 */ | |
| 69 uchar usbFunctionWrite(uchar *data, uchar len) | |
| 70 { | |
| 71 if(bytesRemaining == 0) | |
| 72 return 1; /* end of transfer */ | |
| 73 if(len > bytesRemaining) | |
| 74 len = bytesRemaining; | |
| 75 | |
| 76 // eeprom_write_block(data, (uchar *)0 + currentAddress, len); | |
| 77 uint8_t *tmp = data; | |
| 78 OCR0A = *tmp; | |
| 79 | |
| 80 | |
| 81 currentAddress += len; | |
| 82 bytesRemaining -= len; | |
| 83 return bytesRemaining == 0; /* return 1 if this was the last chunk */ | |
| 84 } | |
| 85 | |
| 86 /* ------------------------------------------------------------------------- */ | |
| 87 | |
| 88 usbMsgLen_t usbFunctionSetup(uchar data[8]) | |
| 89 { | |
| 90 usbRequest_t *rq = (void *)data; | |
| 91 | |
| 92 if((rq->bmRequestType & USBRQ_TYPE_MASK) == USBRQ_TYPE_CLASS){ /* HID class request */ | |
| 93 | |
| 94 // if(rq->bRequest == USBRQ_HID_GET_REPORT){ /* wValue: ReportType (highbyte), ReportID (lowbyte) */ | |
| 95 /* since we have only one report type, we can ignore the report-ID */ | |
| 96 // bytesRemaining = 128; | |
| 97 // currentAddress = 0; | |
| 98 // return USB_NO_MSG; /* use usbFunctionRead() to obtain data */ | |
| 99 // }else | |
| 100 | |
| 101 if(rq->bRequest == USBRQ_HID_SET_REPORT){ | |
| 102 /* since we have only one report type, we can ignore the report-ID */ | |
| 103 bytesRemaining = 1; | |
| 104 currentAddress = 0; | |
| 105 return USB_NO_MSG; /* use usbFunctionWrite() to receive data from host */ | |
| 106 } | |
| 107 }else{ | |
| 108 /* ignore vendor type requests, we don't use any */ | |
| 109 } | |
| 110 return 0; | |
| 111 } | |
| 112 | |
| 113 /* ------------------------------------------------------------------------- */ | |
| 114 | |
| 115 int main(void) | |
| 116 { | |
| 117 uchar i; | |
| 118 | |
| 119 wdt_enable(WDTO_1S); | |
| 120 /* Even if you don't use the watchdog, turn it off here. On newer devices, | |
| 121 * the status of the watchdog (on/off, period) is PRESERVED OVER RESET! | |
| 122 */ | |
| 123 /* RESET status: all port bits are inputs without pull-up. | |
| 124 * That's the way we need D+ and D-. Therefore we don't need any | |
| 125 * additional hardware initialization. | |
| 126 */ | |
| 127 //odDebugInit(); | |
| 128 //DBG1(0x00, 0, 0); /* debug output: main starts */ | |
| 129 usbInit(); | |
| 130 usbDeviceDisconnect(); /* enforce re-enumeration, do this while interrupts are disabled! */ | |
| 131 i = 0; | |
| 132 while(--i){ /* fake USB disconnect for > 250 ms */ | |
| 133 wdt_reset(); | |
| 134 _delay_ms(1); | |
| 135 } | |
| 136 usbDeviceConnect(); | |
| 137 | |
| 138 DDRB |= (1 << PB2); // PWM output on PB2 | |
| 139 TCCR0A = (1 << COM0A1) | (1 << WGM00); // phase correct PWM mode | |
| 140 OCR0A = 0x10; // initial PWM pulse width | |
| 141 TCCR0B = (1 << CS01); // clock source = CLK/8, start PWM | |
| 142 | |
| 143 sei(); | |
| 144 //DBG1(0x01, 0, 0); /* debug output: main loop starts */ | |
| 145 for(;;){ /* main event loop */ | |
| 146 //DBG1(0x02, 0, 0); /* debug output: main loop iterates */ | |
| 147 wdt_reset(); | |
| 148 usbPoll(); | |
| 149 } | |
| 150 return 0; | |
| 151 } | |
| 152 | |
| 153 /* ------------------------------------------------------------------------- */ |
