// AT90USB/SUDAP.c // Simple Usb Data Acquisition Program // Sampling an analog voltage using the intern ADC of AT90USB chip and // sending data to host (Linux PC) over USB in real time. // Sampling interval and number of samples is selected with command line options. // Additionally you can set output pins of digital port B. // The main purpose of this tiny program is to demonstrate the functionality of my // USB firmware written for Atmels AT90USB controller. // Licence: GPL-2 // Build: gcc -l usb SUDAP.c // Usage: see function usage() below. // S. Salewski, 24-MAR-2007 #include #include #include #include #include #include "com_def.h" #include "daq_dev.h" #define TimeOut 2000 // ms const char trstr[] = "Use 1ms, 500us, 200us, 100us, 50us or 20us for time resolution!"; static struct option long_options[] = { {"timeres", required_argument, 0, 't'}, {"samples", required_argument, 0, 's'}, {"columns", required_argument, 0, 'c'}, {"portb", required_argument, 0, 'p'}, {"help", no_argument, 0, 'h'}, {0, 0, 0, 0} }; static void usage(void) { puts("Usage: -t 100us -s 100 -c 1 -p 10001101"); printf("-t or --timeres: "); puts(trstr); puts("-s or --samples: number of samples (1 up to 65535)"); puts("-c or --columns: number of columns for output, default is 32"); puts("-p or --portb: output value for digital port b, use a 8-bit dual number"); } static struct usb_device *UsbFindDevice(void) { struct usb_bus *bus; struct usb_device *dev; usb_init(); usb_find_busses(); usb_find_devices(); for (bus = usb_busses; bus; bus = bus->next) { for (dev = bus->devices; dev; dev = dev->next) { if ((dev->descriptor.idVendor == MyUSB_VendorID) && (dev->descriptor.idProduct == MyUSB_ProductID)) return dev; } } return NULL; } // We use EP2 for DAQ static void dodaq(struct usb_dev_handle *handle, uint16_t timeres, uint16_t samples, int columns) { unsigned char buf[EP2_FIFO_Size]; unsigned char *b; unsigned int m; unsigned int c = 0; if (usb_control_msg(handle, USB_VendorRequestCode, UC_ADC_Read, (int) timeres, (int) samples, NULL, 0, TimeOut) < 0) puts("USB_control_msg error!"); // should never occur while (samples) { if (samples > (EP2_FIFO_Size/2)) m = (EP2_FIFO_Size/2); else m = samples; if (usb_bulk_read(handle, 2, (char*) buf, m * 2, TimeOut) < (m * 2)) puts("USB_bulk_read error!"); // should never occur b = buf; samples -= m; while (m--) { unsigned int k; k = (unsigned int) *b++; k += (unsigned int) *b++ * 256; c++; if (c == columns) { c = 0; printf("%u\n", k); } else printf("%u ", k); } } if (c) putchar('\n'); } int main(int argc, char **argv) { struct usb_device *dev; struct usb_dev_handle *handle; int port = -1; uint16_t samples = 0; uint16_t timeres = 0; int columns = 32; uint8_t status; if (argc == 1) { usage(); exit(EXIT_FAILURE); } while (1) { char *tail; long int l; int option_index = 0; int c; c = getopt_long(argc, argv, "t:s:p:c:h", long_options, &option_index); if (c == -1) break; switch (c) { case 'h': usage(); exit(EXIT_FAILURE); case 'p': errno = 0; l = strtol(optarg, &tail, 2); if ((errno == 0) && (*tail == '\0') && (l >= 0) && (l < 256)) port = (int) l; else { puts("Use a 8-bit binary number for setting port pins!"); exit(EXIT_FAILURE); } break; case 'c': errno = 0; l = strtol(optarg, &tail, 0); if ((errno == 0) && (*tail == '\0') && (l > 0) && (l <= 256)) columns = (int) l; else { puts("Use a positive integer <= 256 for number of columns!"); exit(EXIT_FAILURE); } break; case 't': if ((optarg[0]=='1') && (optarg[1]=='m') && (optarg[2]=='s') && (optarg[3]==0)) timeres = ADC1ms; else if ((optarg[0]=='5') && (optarg[1]=='0') && (optarg[2]=='0') && (optarg[3]=='u') && (optarg[4]=='s') && (optarg[5]==0)) timeres = ADC500us; else if ((optarg[0]=='2') && (optarg[1]=='0') && (optarg[2]=='0') && (optarg[3]=='u') && (optarg[4]=='s') && (optarg[5]==0)) timeres = ADC200us; else if ((optarg[0]=='1') && (optarg[1]=='0') && (optarg[2]=='0') && (optarg[3]=='u') && (optarg[4]=='s') && (optarg[5]==0)) timeres = ADC100us; else if ((optarg[0]=='5') && (optarg[1]=='0') && (optarg[2]=='u') && (optarg[3]=='s') && (optarg[4]==0)) timeres = ADC50us; else if ((optarg[0]=='2') && (optarg[1]=='0') && (optarg[2]=='u') && (optarg[3]=='s') && (optarg[4]==0)) timeres = ADC20us; else { puts(trstr); exit(EXIT_FAILURE); } break; case 's': errno = 0; l = strtol(optarg, &tail, 0); if ((errno == 0) && (*tail == '\0') && (l > 0) && (l <= MaxSamples)) samples = (uint16_t) l; else { puts("Use 0 < samples < 65536!"); exit(EXIT_FAILURE); } break; case '?': exit(EXIT_FAILURE); break; default: abort(); } } if (optind < argc) { printf("Unsupported arguments: "); while (optind < argc) printf("%s ", argv[optind++]); putchar('\n'); exit(EXIT_FAILURE); } if ((!samples) && (timeres)) { puts("Required option: -s or --samples"); exit(EXIT_FAILURE); } if ((samples) && (!timeres)) { puts("Required option: -t or --timeres"); exit(EXIT_FAILURE); } dev = UsbFindDevice(); if (dev == NULL) { puts("USB device not found!"); exit(EXIT_FAILURE); } handle = usb_open(dev); if (handle == NULL) { puts("USB device handle not found!"); exit(EXIT_FAILURE); } if (usb_claim_interface(handle, 0) < 0) { puts("Can not claim interface!"); usb_close(handle); exit(EXIT_FAILURE); } if (port != -1) { status = (uint8_t) port; if (usb_bulk_write(handle, 3, (char*) &status, 1, TimeOut) < 1) puts("Can not set digital port B!"); } if (samples && timeres) { dodaq(handle, timeres, samples, columns); usb_bulk_read(handle, 1, (char*) &status, 1, TimeOut); switch (status) { case (UsbDevStatusOK): break; case (UsbDevStatusDAQ_BufferOverflow): puts("DAQ Buffer Overflow!"); break; case (UsbDevStatusDAQ_TimerOverflow): puts("DAQ Timer Overflow!"); break; case (UsbDevStatusDAQ_ConversionNotFinished): puts("DAQ Conversion was not finished when reading result!"); break; default: puts("Unknown error has occurred!"); } } usb_release_interface(handle, 0); usb_close(handle); exit(EXIT_SUCCESS); }