diff options
Diffstat (limited to 'usb-1wire')
| -rw-r--r-- | usb-1wire/Makefile | 46 | ||||
| -rw-r--r-- | usb-1wire/usb-1wire.c | 168 |
2 files changed, 214 insertions, 0 deletions
diff --git a/usb-1wire/Makefile b/usb-1wire/Makefile new file mode 100644 index 0000000..44219b4 --- /dev/null +++ b/usb-1wire/Makefile @@ -0,0 +1,46 @@ +##
+## spreadspace avr utils
+##
+##
+## Copyright (C) 2013-2014 Christian Pointner <equinox@spreadspace.org>
+##
+## This file is part of spreadspace avr utils.
+##
+## spreadspace avr utils is free software: you can redistribute it and/or modify
+## it under the terms of the GNU General Public License as published by
+## the Free Software Foundation, either version 3 of the License, or
+## any later version.
+##
+## spreadspace avr utils is distributed in the hope that it will be useful,
+## but WITHOUT ANY WARRANTY; without even the implied warranty of
+## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+## GNU General Public License for more details.
+##
+## You should have received a copy of the GNU General Public License
+## along with spreadspace avr utils. If not, see <http://www.gnu.org/licenses/>.
+##
+
+NAME := usb-1wire
+BOARD_TYPE := teensy2
+OBJ := $(NAME).o
+LIBS := util led lufa-descriptor-usbserial usbio onewire ds1820
+EXTERNAL_LIBS := lufa
+RESET_FUNC := ../tools/reset_lufa_cdc
+RESET_PARAM := 'r'
+
+LUFA_PATH := ../contrib/LUFA-120219
+LUFA_OPTS = -D USB_DEVICE_ONLY
+LUFA_OPTS += -D DEVICE_STATE_AS_GPIOR=0
+LUFA_OPTS += -D ORDERED_EP_CONFIG
+LUFA_OPTS += -D FIXED_CONTROL_ENDPOINT_SIZE=8
+LUFA_OPTS += -D FIXED_NUM_CONFIGURATIONS=1
+LUFA_OPTS += -D USE_FLASH_DESCRIPTORS
+LUFA_OPTS += -D USE_STATIC_OPTIONS="(USB_DEVICE_OPT_FULLSPEED | USB_OPT_REG_ENABLED | USB_OPT_AUTO_PLL)"
+LUFA_OPTS += -D INTERRUPT_CONTROL_ENDPOINT
+
+LUFA_OPTS += -D USB_MANUFACTURER="L\"xro\"" -D USB_MANUFACTURER_LEN=3
+LUFA_OPTS += -D USB_PRODUCT="L\"spreadspace usb-1wire example\"" -D USB_PRODUCT_LEN=29
+
+LUFA_COMPONENTS := USB USBCLASS
+
+include ../include.mk
diff --git a/usb-1wire/usb-1wire.c b/usb-1wire/usb-1wire.c new file mode 100644 index 0000000..a94067c --- /dev/null +++ b/usb-1wire/usb-1wire.c @@ -0,0 +1,168 @@ +/*
+ * spreadspace avr utils - usb-1wire example
+ *
+ *
+ * Copyright (C) 2013-2014 Bernhard Tittelbach <xro@realraum.at>
+ * basically this is refactored and enhanced code from:
+ * http://www.pjrc.com/teensy/td_libs_OneWire.html
+ *
+ * This file is part of spreadspace avr utils.
+ *
+ * spreadspace avr utils is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * any later version.
+ *
+ * spreadspace avr utils is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with spreadspace avr utils. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+
+#include <avr/io.h>
+#include <avr/wdt.h>
+#include <avr/interrupt.h>
+#include <util/delay.h>
+#include <stdio.h>
+
+#include "util.h"
+#include "led.h"
+#include "usbio.h"
+
+#define MAX_OWI_DEVICES 8
+
+#include "onewire.h"
+#include "ds1820.h"
+
+
+uint8_t owi_addr_[MAX_OWI_DEVICES][8];
+uint8_t num_owi_dev_found_ = 0;
+uint8_t num_temp_sensors_ = 0;
+
+void discoverOWIBus(void)
+{
+ uint8_t d=0;
+ led_on();
+
+ printf("Searching 1W Bus ");
+ num_owi_dev_found_ = 0;
+ if (owi_reset())
+ printf(" !something is there! ");
+ owi_reset_search();
+ _delay_ms(250);
+
+ while ( owi_search(owi_addr_[ d ]))
+ {
+ d++;
+ printf("%d. found, ", d);
+ led_toggle();
+ if ( d >= MAX_OWI_DEVICES)
+ break;
+ }
+ num_owi_dev_found_ = d;
+ printf(" done \r\n");
+ printf("%d devices found\r\n", d);
+
+ for (d=0; d<num_owi_dev_found_; d++)
+ {
+ printf("OW Dev #%d: addr = ", d);
+ for (uint8_t a=0; a<8; a++)
+ printf("%02x ", owi_addr_[d][a]);
+ if (owi_crc8(owi_addr_[d], 7) == owi_addr_[d][7])
+ printf(" CRC OK");
+ else
+ printf(" CRC ERROR");
+ printf("\r\n");
+ }
+ led_off();
+}
+
+void tempToUSB(uint8_t bit_resolution)
+{
+ uint8_t sensor_index = 0;
+ uint16_t raw_temp = 0;
+ double temp=0.0;
+
+ led_on();
+
+ if (num_temp_sensors_ == 0)
+ {
+ printf("No DS1820 sensors ?? running bus discovery... \r\n");
+ num_temp_sensors_ = ds1820_discover();
+ }
+ printf("%d DS18x20 sensors on the bus\r\n", num_temp_sensors_);
+
+ for (sensor_index=0; sensor_index < num_temp_sensors_; sensor_index++)
+ {
+ ds1820_set_resolution(sensor_index, bit_resolution);
+ ds1820_start_measuring(sensor_index);
+ }
+
+ ds1820_wait_conversion_time(bit_resolution);
+
+ for (sensor_index=0; sensor_index < num_temp_sensors_; sensor_index++)
+ {
+ raw_temp = ds1820_read_temperature(sensor_index);
+ printf("DS1820 #%d: ", sensor_index);
+ if (raw_temp == DS1820_ERROR)
+ {
+ printf("CRC comm error\r\n");
+ } else {
+ temp = ds1820_raw_temp_to_celsius( raw_temp );
+ printf("raw: %d, celsius (float): %f, celsius (int): %d.%02d, %d bit resolution\r\n",
+ raw_temp,
+ temp ,
+ raw_temp / 16, (raw_temp <0 ? -1 : 1) * 100 * (raw_temp % 16) / 16,
+ bit_resolution
+ );
+ }
+ }
+ led_off();
+}
+
+
+void handle_cmd(uint8_t cmd)
+{
+ switch(cmd) {
+ case '0': discoverOWIBus(); break;
+ case '1': num_temp_sensors_ = ds1820_discover(); break;
+ case '2': tempToUSB(9); break;
+ case '3': tempToUSB(10); break;
+ case '4': tempToUSB(11); break;
+ case '5': tempToUSB(12); break;
+ case 'r': reset2bootloader(); break;
+ default: printf("error\r\n"); return;
+ }
+ printf("ok\r\n");
+}
+
+int main(void)
+{
+ MCUSR &= ~(1 << WDRF);
+ wdt_disable();
+
+ cpu_init();
+ led_init();
+ usbio_init();
+ sei();
+ owi_init(7, &PINC);
+
+ for(;;)
+ {
+ int16_t BytesReceived = usbio_bytes_received();
+ while(BytesReceived > 0)
+ {
+ int ReceivedByte = fgetc(stdin);
+ if(ReceivedByte != EOF) {
+ handle_cmd(ReceivedByte);
+ }
+ BytesReceived--;
+ }
+
+ usbio_task();
+ }
+}
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