added very basic pwm example

git-svn-id: https://svn.spreadspace.org/avr/trunk@189 aa12f405-d877-488e-9caf-2d797e2a1cc7

2 files changed, 206 insertions, 0 deletions

diff --git a/usb-pwm/Makefile b/usb-pwm/Makefile
new file mode 100644
index 0000000..9cabb93
--- /dev/null
+++ b/usb-pwm/Makefile
@@ -0,0 +1,44 @@
+##

+##  spreadspace avr utils

+##

+##

+##  Copyright (C) 2013 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-pwm

+BOARD_TYPE := teensy2

+OBJ := $(NAME).o

+LIBS := util led lufa-descriptor-usbserial

+EXTERNAL_LIBS := lufa

+

+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\"equinox\""

+LUFA_OPTS += -D USB_PRODUCT="L\"$(NAME)\""

+

+LUFA_COMPONENTS := USB USBCLASS

+

+include ../include.mk

diff --git a/usb-pwm/usb-pwm.c b/usb-pwm/usb-pwm.c
new file mode 100644
index 0000000..fd1e916
--- /dev/null
+++ b/usb-pwm/usb-pwm.c
@@ -0,0 +1,162 @@
+/*

+ *  spreadspace avr utils

+ *

+ *

+ *  Copyright (C) 2013 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/>.

+ */

+

+

+#include <avr/io.h>

+#include <avr/wdt.h>

+#include <avr/interrupt.h>

+#include <avr/power.h>

+

+#include "util.h"

+#include "led.h"

+

+/*

+             LUFA Library

+     Copyright (C) Dean Camera, 2012.

+

+  dean [at] fourwalledcubicle [dot] com

+           www.lufa-lib.org

+*/

+#include <LUFA/Drivers/USB/USB.h>

+#include "lufa-descriptor-usbserial.h"

+

+USB_ClassInfo_CDC_Device_t VirtualSerial_CDC_Interface =

+  {

+    .Config =

+      {

+        .ControlInterfaceNumber         = 0,

+

+        .DataINEndpointNumber           = CDC_TX_EPNUM,

+        .DataINEndpointSize             = CDC_TXRX_EPSIZE,

+        .DataINEndpointDoubleBank       = false,

+

+        .DataOUTEndpointNumber          = CDC_RX_EPNUM,

+        .DataOUTEndpointSize            = CDC_TXRX_EPSIZE,

+        .DataOUTEndpointDoubleBank      = false,

+

+        .NotificationEndpointNumber     = CDC_NOTIFICATION_EPNUM,

+        .NotificationEndpointSize       = CDC_NOTIFICATION_EPSIZE,

+        .NotificationEndpointDoubleBank = false,

+      },

+  };

+

+void EVENT_USB_Device_ConfigurationChanged(void)

+{

+  CDC_Device_ConfigureEndpoints(&VirtualSerial_CDC_Interface);

+}

+

+void EVENT_USB_Device_ControlRequest(void)

+{

+  CDC_Device_ProcessControlRequest(&VirtualSerial_CDC_Interface);

+}

+/* end LUFA CDC-ACM specific definitions*/

+

+#define PWM_VAL OCR1BL

+

+void pwm_init(void)

+{

+  DDRB |= (1<<PB6);

+  TCCR1B = 0;

+  TCNT1 = 0;

+  OCR1B = 0;

+  TCCR1A = (1<<COM1B1) | (1<<WGM10);

+  TCCR1B = (1<<WGM12);

+}

+

+inline void pwm_on(void)

+{

+  TCCR1B = (TCCR1B & 0xF8) | (1<<CS10);

+}

+

+inline void pwm_off(void)

+{

+  TCCR1B = (TCCR1B & 0xF8);

+  TCNT1 = 0;

+}

+

+inline void pwm_set(uint8_t val)

+{

+  PWM_VAL = val;

+}

+

+inline void pwm_inc(void)

+{

+  if(PWM_VAL < 255)

+    PWM_VAL++;

+}

+

+inline void pwm_dec(void)

+{

+  if(PWM_VAL > 0)

+    PWM_VAL--;

+}

+

+

+FILE usb_stream;

+

+void stdio_init(void)

+{

+  CDC_Device_CreateStream(&VirtualSerial_CDC_Interface,&usb_stream);

+  stdin = &usb_stream;

+  stdout = &usb_stream;

+  stderr = &usb_stream;

+}

+

+void handle_cmd(uint8_t cmd)

+{

+  switch(cmd) {

+  case '0': pwm_off(); led_off(); printf("ok\r\n"); break;

+  case '1': pwm_on(); led_on(); printf("ok\r\n"); break;

+  case '+': pwm_inc(); printf("pwm = %d\r\n", PWM_VAL);  break;

+  case '-': pwm_dec(); printf("pwm = %d\r\n", PWM_VAL); break;

+  case 'r': reset2bootloader(); break;

+  default: printf("error\r\n"); return;

+  }

+

+}

+

+int main(void)

+{

+  MCUSR &= ~(1 << WDRF);

+  wdt_disable();

+

+  cpu_init();

+  led_init();

+  USB_Init();

+  stdio_init();

+  pwm_init();

+  sei();

+

+  for(;;) {

+    int16_t BytesReceived = CDC_Device_BytesReceived(&VirtualSerial_CDC_Interface);

+    while(BytesReceived > 0) {

+      int ReceivedByte = fgetc(stdin);

+      if(ReceivedByte != EOF) {

+        handle_cmd(ReceivedByte);

+      }

+      BytesReceived--;

+    }

+

+    CDC_Device_USBTask(&VirtualSerial_CDC_Interface);

+    USB_USBTask();

+  }

+}