From 0279a2bcf0e9a06f7be8fde44f1afe15eb5b18d1 Mon Sep 17 00:00:00 2001 From: Harald Welte Date: Sun, 31 Jul 2011 12:17:31 +0200 Subject: import usb-device-cdc-serial --- usb-device-cdc-serial-project/Makefile | 163 +++++++ usb-device-cdc-serial-project/bin/.empty | 0 usb-device-cdc-serial-project/main.c | 728 +++++++++++++++++++++++++++++++ usb-device-cdc-serial-project/obj/.empty | 0 4 files changed, 891 insertions(+) create mode 100644 usb-device-cdc-serial-project/Makefile create mode 100644 usb-device-cdc-serial-project/bin/.empty create mode 100644 usb-device-cdc-serial-project/main.c create mode 100644 usb-device-cdc-serial-project/obj/.empty (limited to 'usb-device-cdc-serial-project') diff --git a/usb-device-cdc-serial-project/Makefile b/usb-device-cdc-serial-project/Makefile new file mode 100644 index 0000000..cf8b126 --- /dev/null +++ b/usb-device-cdc-serial-project/Makefile @@ -0,0 +1,163 @@ +# ---------------------------------------------------------------------------- +# ATMEL Microcontroller Software Support +# ---------------------------------------------------------------------------- +# Copyright (c) 2008, Atmel Corporation +# +# All rights reserved. +# +# Redistribution and use in source and binary forms, with or without +# modification, are permitted provided that the following conditions are met: +# +# - Redistributions of source code must retain the above copyright notice, +# this list of conditions and the disclaimer below. +# +# Atmel's name may not be used to endorse or promote products derived from +# this software without specific prior written permission. +# +# DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR +# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF +# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE +# DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT, +# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, +# OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF +# LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING +# NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, +# EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. +# ---------------------------------------------------------------------------- + +# Makefile for compiling the USB CDC serial project + +#------------------------------------------------------------------------------- +# User-modifiable options +#------------------------------------------------------------------------------- + +# Chip & board used for compilation +# (can be overriden by adding CHIP=chip and BOARD=board to the command-line) +CHIP = at91sam7s256 +BOARD = at91sam7s-ek + +# Trace level used for compilation +# (can be overriden by adding TRACE_LEVEL=#number to the command-line) +# TRACE_LEVEL_DEBUG 5 +# TRACE_LEVEL_INFO 4 +# TRACE_LEVEL_WARNING 3 +# TRACE_LEVEL_ERROR 2 +# TRACE_LEVEL_FATAL 1 +# TRACE_LEVEL_NO_TRACE 0 +TRACE_LEVEL = 3 + +# Optimization level, put in comment for debugging +OPTIMIZATION = -Os + +# AT91 library directory +AT91LIB = ../at91lib + +# Output file basename +OUTPUT = usb-device-cdc-serial-project-$(BOARD)-$(CHIP) + +# Compile for all memories available on the board (this sets $(MEMORIES)) +include $(AT91LIB)/boards/$(BOARD)/board.mak + +# Output directories +BIN = bin +OBJ = obj + +#------------------------------------------------------------------------------- +# Tools +#------------------------------------------------------------------------------- + +# Tool suffix when cross-compiling +CROSS_COMPILE = arm-none-eabi- + +# Compilation tools +CC = $(CROSS_COMPILE)gcc +SIZE = $(CROSS_COMPILE)size +OBJCOPY = $(CROSS_COMPILE)objcopy + +# Flags +INCLUDES = -I$(AT91LIB)/boards/$(BOARD) -I$(AT91LIB)/peripherals +INCLUDES += -I$(AT91LIB)/components -I$(AT91LIB)/usb/device -I$(AT91LIB) + +CFLAGS = -Wall -mlong-calls -ffunction-sections +CFLAGS += -g $(OPTIMIZATION) $(INCLUDES) -D$(CHIP) -DTRACE_LEVEL=$(TRACE_LEVEL) +ASFLAGS = -g $(OPTIMIZATION) $(INCLUDES) -D$(CHIP) -D__ASSEMBLY__ +LDFLAGS = -g $(OPTIMIZATION) -nostartfiles -Wl,--gc-sections + +#------------------------------------------------------------------------------- +# Files +#------------------------------------------------------------------------------- + +# Directories where source files can be found +USB = $(AT91LIB)/usb +UTILITY = $(AT91LIB)/utility +PERIPH = $(AT91LIB)/peripherals +BOARDS = $(AT91LIB)/boards + +VPATH += $(USB)/device/cdc-serial $(USB)/device/core $(USB)/common/core +VPATH += $(USB)/common/cdc +VPATH += $(UTILITY) +VPATH += $(PERIPH)/dbgu $(PERIPH)/aic $(PERIPH)/usart $(PERIPH)/pio $(PERIPH)/pmc +VPATH += $(PERIPH)/cp15 +VPATH += $(BOARDS)/$(BOARD) $(BOARDS)/$(BOARD)/$(CHIP) + +# Objects built from C source files +C_OBJECTS = main.o +C_OBJECTS += CDCDSerialDriver.o CDCDSerialDriverDescriptors.o +C_OBJECTS += CDCSetControlLineStateRequest.o CDCLineCoding.o +C_OBJECTS += USBD_OTGHS.o USBD_UDP.o USBD_UDPHS.o USBDDriver.o +C_OBJECTS += USBDCallbacks_Initialized.o +C_OBJECTS += USBDCallbacks_Reset.o +#C_OBJECTS += USBDCallbacks_Resumed.o +#C_OBJECTS += USBDCallbacks_Suspended.o +C_OBJECTS += USBDDriverCb_CfgChanged.o +C_OBJECTS += USBDDriverCb_IfSettingChanged.o +C_OBJECTS += USBSetAddressRequest.o USBGenericDescriptor.o USBInterfaceRequest.o +C_OBJECTS += USBGenericRequest.o USBGetDescriptorRequest.o +C_OBJECTS += USBSetConfigurationRequest.o USBFeatureRequest.o +C_OBJECTS += USBEndpointDescriptor.o USBConfigurationDescriptor.o +C_OBJECTS += led.o string.o stdio.o +C_OBJECTS += aic.o dbgu.o usart.o pio.o pio_it.o pmc.o cp15.o +C_OBJECTS += board_memories.o board_lowlevel.o + +# Objects built from Assembly source files +ASM_OBJECTS = board_cstartup.o +ASM_OBJECTS += cp15_asm.o + +# Append OBJ and BIN directories to output filename +OUTPUT := $(BIN)/$(OUTPUT) + +#------------------------------------------------------------------------------- +# Rules +#------------------------------------------------------------------------------- + +all: $(BIN) $(OBJ) $(MEMORIES) + +$(BIN) $(OBJ): + mkdir $@ + +define RULES +C_OBJECTS_$(1) = $(addprefix $(OBJ)/$(1)_, $(C_OBJECTS)) +ASM_OBJECTS_$(1) = $(addprefix $(OBJ)/$(1)_, $(ASM_OBJECTS)) + +$(1): $$(ASM_OBJECTS_$(1)) $$(C_OBJECTS_$(1)) + $(CC) $(LDFLAGS) -T"$(AT91LIB)/boards/$(BOARD)/$(CHIP)/$$@.lds" -o $(OUTPUT)-$$@.elf $$^ + $(OBJCOPY) -O binary $(OUTPUT)-$$@.elf $(OUTPUT)-$$@.bin + $(SIZE) $$^ $(OUTPUT)-$$@.elf + +$$(C_OBJECTS_$(1)): $(OBJ)/$(1)_%.o: %.c Makefile $(OBJ) $(BIN) + $(CC) $(CFLAGS) -D$(1) -c -o $$@ $$< + +$$(ASM_OBJECTS_$(1)): $(OBJ)/$(1)_%.o: %.S Makefile $(OBJ) $(BIN) + $(CC) $(ASFLAGS) -D$(1) -c -o $$@ $$< + +debug_$(1): $(1) + perl ../resources/gdb/debug.pl $(OUTPUT)-$(1).elf + +endef + +$(foreach MEMORY, $(MEMORIES), $(eval $(call RULES,$(MEMORY)))) + +clean: + -rm -f $(OBJ)/*.o $(BIN)/*.bin $(BIN)/*.elf + diff --git a/usb-device-cdc-serial-project/bin/.empty b/usb-device-cdc-serial-project/bin/.empty new file mode 100644 index 0000000..e69de29 diff --git a/usb-device-cdc-serial-project/main.c b/usb-device-cdc-serial-project/main.c new file mode 100644 index 0000000..1f4e1e7 --- /dev/null +++ b/usb-device-cdc-serial-project/main.c @@ -0,0 +1,728 @@ +/* ---------------------------------------------------------------------------- + * ATMEL Microcontroller Software Support + * ---------------------------------------------------------------------------- + * Copyright (c) 2008, Atmel Corporation + * + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * - Redistributions of source code must retain the above copyright notice, + * this list of conditions and the disclaimer below. + * + * Atmel's name may not be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE + * DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, + * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF + * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING + * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, + * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * ---------------------------------------------------------------------------- + */ + +//----------------------------------------------------------------------------- +/// \dir "USB CDC serial converter" +/// +/// !!!Purpose +/// +/// The USB CDC Serial Project will help you to get familiar with the +/// USB Device Port(UDP) and USART interface on AT91SAM microcontrollers. Also +/// it can help you to be familiar with the USB Framework that is used for +/// rapid development of USB-compliant class drivers such as USB Communication +/// Device class (CDC). +/// +/// You can find following information depends on your needs: +/// - Sample usage of USB CDC driver and USART driver. +/// - USB CDC driver development based on the AT91 USB Framework. +/// - USB enumerate sequence, the standard and class-specific descriptors and +/// requests handling. +/// - The initialize sequence and usage of UDP interface. +/// - The initialize sequence and usage of USART interface with PDC. +/// +/// !See +/// - usart: USART interface driver +/// - tc: TIMER/COUNTER interface driver +/// - usb: USB Framework, USB CDC driver and UDP interface driver +/// - "AT91 USB device framework" +/// - "USBD API" +/// - "cdc-serial" +/// - "USB CDC Serial Device" +/// - "USB CDC Serial Host Driver" +/// +/// !!!Requirements +/// +/// This package can be used with all Atmel evaluation kits that have both +/// UDP and USART interface. +/// +/// The current supported board list: +/// - at91sam7s-ek (exclude at91sam7s32) +/// - at91sam7x-ek +/// - at91sam7xc-ek +/// - at91sam7a3-ek +/// - at91sam7se-ek +/// - at91sam9260-ek +/// - at91sam9263-ek +/// +/// !!!Description +/// +/// When an EK running this program connected to a host (PC for example), with +/// USB cable, the EK appears as a Seriao COM port for the host, after driver +/// installation with the offered 6119.inf. Then the host can send or receive +/// data through the port with host software. The data stream from the host is +/// then sent to the EK, and forward to USART port of AT91SAM chips. The USART +/// port of the EK is monitored by the timer and the incoming data will be sent +/// to the host. +/// +/// !!!Usage +/// +/// -# Build the program and download it inside the evaluation board. Please +/// refer to the +/// +/// SAM-BA User Guide, the +/// +/// GNU-Based Software Development application note or to the +/// +/// IAR EWARM User Guide, depending on your chosen solution. +/// -# On the computer, open and configure a terminal application +/// (e.g. HyperTerminal on Microsoft Windows) with these settings: +/// - 115200 bauds +/// - 8 bits of data +/// - No parity +/// - 1 stop bit +/// - No flow control +/// -# Start the application. +/// -# In the terminal window, the following text should appear: +/// \code +/// -- USB Device CDC Serial Project xxx -- +/// -- AT91xxxxxx-xx +/// -- Compiled: xxx xx xxxx xx:xx:xx -- +/// \endcode +/// -# When connecting USB cable to windows, the LED blinks, and the host +/// reports a new USB %device attachment (if it's the first time you connect +/// an %audio speaker demo board to your host). You can use the inf file +/// at91lib\\usb\\device\\cdc-serial\\drv\\6119.inf to install the serial +/// port. Then new "AT91 USB to Serial Converter (COMx)" appears in the +/// hardware %device list. +/// -# You can run hyperterminal to send data to the port. And it can be seen +/// at the other hyperterminal connected to the USART port of the EK. +/// +//----------------------------------------------------------------------------- + +//----------------------------------------------------------------------------- +/// \unit +/// +/// !Purpose +/// +/// This file contains all the specific code for the +/// usb-device-cdc-serial-project +/// +/// !Contents +/// +/// The code can be roughly broken down as follows: +/// - Configuration functions +/// - VBus_Configure +/// - PIO & Timer configurations in start of main +/// - Interrupt handlers +/// - ISR_Vbus +/// - ISR_Timer0 +/// - ISR_Usart0 +/// - Callback functions +/// - UsbDataReceived +/// - The main function, which implements the program behavior +/// +/// Please refer to the list of functions in the #Overview# tab of this unit +/// for more detailed information. +//----------------------------------------------------------------------------- + +//----------------------------------------------------------------------------- +// Headers +//------------------------------------------------------------------------------ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +//------------------------------------------------------------------------------ +// Definitions +//------------------------------------------------------------------------------ +#ifndef AT91C_ID_TC0 + #define AT91C_ID_TC0 AT91C_ID_TC +#endif + +/// Size in bytes of the buffer used for reading data from the USB & USART +#define DATABUFFERSIZE \ + BOARD_USB_ENDPOINTS_MAXPACKETSIZE(CDCDSerialDriverDescriptors_DATAIN) + +/// Use for power management +#define STATE_IDLE 0 +/// The USB device is in suspend state +#define STATE_SUSPEND 4 +/// The USB device is in resume state +#define STATE_RESUME 5 + +//------------------------------------------------------------------------------ +// Internal variables +//------------------------------------------------------------------------------ +/// State of USB, for suspend and resume +unsigned char USBState = STATE_IDLE; + +/// List of pins that must be configured for use by the application. +static const Pin pins[] = {PIN_USART0_TXD, PIN_USART0_RXD}; + +/// Double-buffer for storing incoming USART data. +static unsigned char usartBuffers[2][DATABUFFERSIZE]; + +/// Current USART buffer index. +static unsigned char usartCurrentBuffer = 0; + +/// Buffer for storing incoming USB data. +static unsigned char usbBuffer[DATABUFFERSIZE]; + +//------------------------------------------------------------------------------ +// VBus monitoring (optional) +//------------------------------------------------------------------------------ +#if defined(PIN_USB_VBUS) + +#define VBUS_CONFIGURE() VBus_Configure() + +/// VBus pin instance. +static const Pin pinVbus = PIN_USB_VBUS; + +//------------------------------------------------------------------------------ +/// Handles interrupts coming from PIO controllers. +//------------------------------------------------------------------------------ +static void ISR_Vbus(const Pin *pPin) +{ + // Check current level on VBus + if (PIO_Get(&pinVbus)) { + + TRACE_INFO("VBUS conn\n\r"); + USBD_Connect(); + } + else { + + TRACE_INFO("VBUS discon\n\r"); + USBD_Disconnect(); + } +} + +//------------------------------------------------------------------------------ +/// Configures the VBus pin to trigger an interrupt when the level on that pin +/// changes. +//------------------------------------------------------------------------------ +static void VBus_Configure( void ) +{ + TRACE_INFO("VBus configuration\n\r"); + + // Configure PIO + PIO_Configure(&pinVbus, 1); + PIO_ConfigureIt(&pinVbus, ISR_Vbus); + PIO_EnableIt(&pinVbus); + + // Check current level on VBus + if (PIO_Get(&pinVbus)) { + + // if VBUS present, force the connect + TRACE_INFO("VBUS conn\n\r"); + USBD_Connect(); + } + else { + USBD_Disconnect(); + } +} + +#else + #define VBUS_CONFIGURE() USBD_Connect() +#endif //#if defined(PIN_USB_VBUS) + +#if defined (CP15_PRESENT) +//------------------------------------------------------------------------------ +/// Put the CPU in 32kHz, disable PLL, main oscillator +/// Put voltage regulator in standby mode +//------------------------------------------------------------------------------ +void LowPowerMode(void) +{ + PMC_CPUInIdleMode(); +} +//------------------------------------------------------------------------------ +/// Put voltage regulator in normal mode +/// Return the CPU to normal speed 48MHz, enable PLL, main oscillator +//------------------------------------------------------------------------------ +void NormalPowerMode(void) +{ +} + +#elif defined(at91sam7a3) +//------------------------------------------------------------------------------ +/// Put the CPU in 32kHz, disable PLL, main oscillator +//------------------------------------------------------------------------------ +void LowPowerMode(void) +{ + // MCK=48MHz to MCK=32kHz + // MCK = SLCK/2 : change source first from 48 000 000 to 18. / 2 = 9M + AT91C_BASE_PMC->PMC_MCKR = AT91C_PMC_PRES_CLK_2; + while( !( AT91C_BASE_PMC->PMC_SR & AT91C_PMC_MCKRDY ) ); + // MCK=SLCK : then change prescaler + AT91C_BASE_PMC->PMC_MCKR = AT91C_PMC_CSS_SLOW_CLK; + while( !( AT91C_BASE_PMC->PMC_SR & AT91C_PMC_MCKRDY ) ); + // disable PLL + AT91C_BASE_PMC->PMC_PLLR = 0; + // Disable Main Oscillator + AT91C_BASE_PMC->PMC_MOR = 0; + + PMC_DisableProcessorClock(); +} +//------------------------------------------------------------------------------ +/// Return the CPU to normal speed 48MHz, enable PLL, main oscillator +//------------------------------------------------------------------------------ +void NormalPowerMode(void) +{ + // MCK=32kHz to MCK=48MHz + // enable Main Oscillator + AT91C_BASE_PMC->PMC_MOR = (( (AT91C_CKGR_OSCOUNT & (0x06 <<8)) | AT91C_CKGR_MOSCEN )); + while( !( AT91C_BASE_PMC->PMC_SR & AT91C_PMC_MOSCS ) ); + + // enable PLL@96MHz + AT91C_BASE_PMC->PMC_PLLR = ((AT91C_CKGR_DIV & 0x0E) | + (AT91C_CKGR_PLLCOUNT & (28<<8)) | + (AT91C_CKGR_MUL & (0x48<<16))); + while( !( AT91C_BASE_PMC->PMC_SR & AT91C_PMC_LOCK ) ); + while( !( AT91C_BASE_PMC->PMC_SR & AT91C_PMC_MCKRDY ) ); + AT91C_BASE_CKGR->CKGR_PLLR |= AT91C_CKGR_USBDIV_1 ; + // MCK=SLCK/2 : change prescaler first + AT91C_BASE_PMC->PMC_MCKR = AT91C_PMC_PRES_CLK_2; + while( !( AT91C_BASE_PMC->PMC_SR & AT91C_PMC_MCKRDY ) ); + // MCK=PLLCK/2 : then change source + AT91C_BASE_PMC->PMC_MCKR |= AT91C_PMC_CSS_PLL_CLK ; + while( !( AT91C_BASE_PMC->PMC_SR & AT91C_PMC_MCKRDY ) ); +} + +#elif defined (at91sam7se) +//------------------------------------------------------------------------------ +/// Put the CPU in 32kHz, disable PLL, main oscillator +/// Put voltage regulator in standby mode +//------------------------------------------------------------------------------ +void LowPowerMode(void) +{ + // MCK=48MHz to MCK=32kHz + // MCK = SLCK/2 : change source first from 48 000 000 to 18. / 2 = 9M + AT91C_BASE_PMC->PMC_MCKR = AT91C_PMC_PRES_CLK_2; + while( !( AT91C_BASE_PMC->PMC_SR & AT91C_PMC_MCKRDY ) ); + // MCK=SLCK : then change prescaler + AT91C_BASE_PMC->PMC_MCKR = AT91C_PMC_CSS_SLOW_CLK; + while( !( AT91C_BASE_PMC->PMC_SR & AT91C_PMC_MCKRDY ) ); + // disable PLL + AT91C_BASE_PMC->PMC_PLLR = 0; + // Disable Main Oscillator + AT91C_BASE_PMC->PMC_MOR = 0; + + // Voltage regulator in standby mode : Enable VREG Low Power Mode + AT91C_BASE_VREG->VREG_MR |= AT91C_VREG_PSTDBY; + + PMC_DisableProcessorClock(); +} +//------------------------------------------------------------------------------ +/// Put voltage regulator in normal mode +/// Return the CPU to normal speed 48MHz, enable PLL, main oscillator +//------------------------------------------------------------------------------ +void NormalPowerMode(void) +{ + // Voltage regulator in normal mode : Disable VREG Low Power Mode + AT91C_BASE_VREG->VREG_MR &= ~AT91C_VREG_PSTDBY; + + // MCK=32kHz to MCK=48MHz + // enable Main Oscillator + AT91C_BASE_PMC->PMC_MOR = (( (AT91C_CKGR_OSCOUNT & (0x06 <<8)) | AT91C_CKGR_MOSCEN )); + while( !( AT91C_BASE_PMC->PMC_SR & AT91C_PMC_MOSCS ) ); + + // enable PLL@96MHz + AT91C_BASE_PMC->PMC_PLLR = ((AT91C_CKGR_DIV & 0x0E) | + (AT91C_CKGR_PLLCOUNT & (28<<8)) | + (AT91C_CKGR_MUL & (0x48<<16))); + while( !( AT91C_BASE_PMC->PMC_SR & AT91C_PMC_LOCK ) ); + while( !( AT91C_BASE_PMC->PMC_SR & AT91C_PMC_MCKRDY ) ); + AT91C_BASE_CKGR->CKGR_PLLR |= AT91C_CKGR_USBDIV_1 ; + // MCK=SLCK/2 : change prescaler first + AT91C_BASE_PMC->PMC_MCKR = AT91C_PMC_PRES_CLK_2; + while( !( AT91C_BASE_PMC->PMC_SR & AT91C_PMC_MCKRDY ) ); + // MCK=PLLCK/2 : then change source + AT91C_BASE_PMC->PMC_MCKR |= AT91C_PMC_CSS_PLL_CLK ; + while( !( AT91C_BASE_PMC->PMC_SR & AT91C_PMC_MCKRDY ) ); +} + +#elif defined (at91sam7s) +//------------------------------------------------------------------------------ +/// Put the CPU in 32kHz, disable PLL, main oscillator +/// Put voltage regulator in standby mode +//------------------------------------------------------------------------------ +void LowPowerMode(void) +{ + // MCK=48MHz to MCK=32kHz + // MCK = SLCK/2 : change source first from 48 000 000 to 18. / 2 = 9M + AT91C_BASE_PMC->PMC_MCKR = AT91C_PMC_PRES_CLK_2; + while( !( AT91C_BASE_PMC->PMC_SR & AT91C_PMC_MCKRDY ) ); + // MCK=SLCK : then change prescaler + AT91C_BASE_PMC->PMC_MCKR = AT91C_PMC_CSS_SLOW_CLK; + while( !( AT91C_BASE_PMC->PMC_SR & AT91C_PMC_MCKRDY ) ); + // disable PLL + AT91C_BASE_PMC->PMC_PLLR = 0; + // Disable Main Oscillator + AT91C_BASE_PMC->PMC_MOR = 0; + + // Voltage regulator in standby mode : Enable VREG Low Power Mode + AT91C_BASE_VREG->VREG_MR |= AT91C_VREG_PSTDBY; + + PMC_DisableProcessorClock(); +} + +//------------------------------------------------------------------------------ +/// Put voltage regulator in normal mode +/// Return the CPU to normal speed 48MHz, enable PLL, main oscillator +//------------------------------------------------------------------------------ +void NormalPowerMode(void) +{ + // Voltage regulator in normal mode : Disable VREG Low Power Mode + AT91C_BASE_VREG->VREG_MR &= ~AT91C_VREG_PSTDBY; + + // MCK=32kHz to MCK=48MHz + // enable Main Oscillator + AT91C_BASE_PMC->PMC_MOR = (( (AT91C_CKGR_OSCOUNT & (0x06 <<8)) | AT91C_CKGR_MOSCEN )); + while( !( AT91C_BASE_PMC->PMC_SR & AT91C_PMC_MOSCS ) ); + + // enable PLL@96MHz + AT91C_BASE_PMC->PMC_PLLR = ((AT91C_CKGR_DIV & 0x0E) | + (AT91C_CKGR_PLLCOUNT & (28<<8)) | + (AT91C_CKGR_MUL & (0x48<<16))); + while( !( AT91C_BASE_PMC->PMC_SR & AT91C_PMC_LOCK ) ); + while( !( AT91C_BASE_PMC->PMC_SR & AT91C_PMC_MCKRDY ) ); + AT91C_BASE_CKGR->CKGR_PLLR |= AT91C_CKGR_USBDIV_1 ; + // MCK=SLCK/2 : change prescaler first + AT91C_BASE_PMC->PMC_MCKR = AT91C_PMC_PRES_CLK_2; + while( !( AT91C_BASE_PMC->PMC_SR & AT91C_PMC_MCKRDY ) ); + // MCK=PLLCK/2 : then change source + AT91C_BASE_PMC->PMC_MCKR |= AT91C_PMC_CSS_PLL_CLK ; + while( !( AT91C_BASE_PMC->PMC_SR & AT91C_PMC_MCKRDY ) ); + +} + +#elif defined (at91sam7x) || defined (at91sam7xc) +//------------------------------------------------------------------------------ +/// Put the CPU in 32kHz, disable PLL, main oscillator +/// Put voltage regulator in standby mode +//------------------------------------------------------------------------------ +void LowPowerMode(void) +{ + // MCK=48MHz to MCK=32kHz + // MCK = SLCK/2 : change source first from 48 000 000 to 18. / 2 = 9M + AT91C_BASE_PMC->PMC_MCKR = AT91C_PMC_PRES_CLK_2; + while( !( AT91C_BASE_PMC->PMC_SR & AT91C_PMC_MCKRDY ) ); + // MCK=SLCK : then change prescaler + AT91C_BASE_PMC->PMC_MCKR = AT91C_PMC_CSS_SLOW_CLK; + while( !( AT91C_BASE_PMC->PMC_SR & AT91C_PMC_MCKRDY ) ); + // disable PLL + AT91C_BASE_PMC->PMC_PLLR = 0; + // Disable Main Oscillator + AT91C_BASE_PMC->PMC_MOR = 0; + + // Voltage regulator in standby mode : Enable VREG Low Power Mode + AT91C_BASE_VREG->VREG_MR |= AT91C_VREG_PSTDBY; + + PMC_DisableProcessorClock(); +} + +//------------------------------------------------------------------------------ +/// Put voltage regulator in normal mode +/// Return the CPU to normal speed 48MHz, enable PLL, main oscillator +//------------------------------------------------------------------------------ +void NormalPowerMode(void) +{ + // Voltage regulator in normal mode : Disable VREG Low Power Mode + AT91C_BASE_VREG->VREG_MR &= ~AT91C_VREG_PSTDBY; + + // MCK=32kHz to MCK=48MHz + // enable Main Oscillator + AT91C_BASE_PMC->PMC_MOR = (( (AT91C_CKGR_OSCOUNT & (0x06 <<8)) | AT91C_CKGR_MOSCEN )); + while( !( AT91C_BASE_PMC->PMC_SR & AT91C_PMC_MOSCS ) ); + + // enable PLL@96MHz + AT91C_BASE_PMC->PMC_PLLR = ((AT91C_CKGR_DIV & 0x0E) | + (AT91C_CKGR_PLLCOUNT & (28<<8)) | + (AT91C_CKGR_MUL & (0x48<<16))); + while( !( AT91C_BASE_PMC->PMC_SR & AT91C_PMC_LOCK ) ); + while( !( AT91C_BASE_PMC->PMC_SR & AT91C_PMC_MCKRDY ) ); + AT91C_BASE_CKGR->CKGR_PLLR |= AT91C_CKGR_USBDIV_1 ; + // MCK=SLCK/2 : change prescaler first + AT91C_BASE_PMC->PMC_MCKR = AT91C_PMC_PRES_CLK_2; + while( !( AT91C_BASE_PMC->PMC_SR & AT91C_PMC_MCKRDY ) ); + // MCK=PLLCK/2 : then change source + AT91C_BASE_PMC->PMC_MCKR |= AT91C_PMC_CSS_PLL_CLK ; + while( !( AT91C_BASE_PMC->PMC_SR & AT91C_PMC_MCKRDY ) ); +} + +#endif + +//------------------------------------------------------------------------------ +// Internal functions +//------------------------------------------------------------------------------ + +//------------------------------------------------------------------------------ +/// Handles interrupts coming from Timer #0. +//------------------------------------------------------------------------------ +static void ISR_Timer0() +{ + unsigned char size; + unsigned int status = AT91C_BASE_TC0->TC_SR; + + if ((status & AT91C_TC_CPCS) != 0) { + + // Flush PDC buffer + size = DATABUFFERSIZE - AT91C_BASE_US0->US_RCR; + if (size == 0) { + + AT91C_BASE_TC0->TC_CCR = AT91C_TC_CLKEN | AT91C_TC_SWTRG; + return; + } + AT91C_BASE_US0->US_RCR = 0; + + // Send current buffer through the USB + while (CDCDSerialDriver_Write(usartBuffers[usartCurrentBuffer], + size, 0, 0) != USBD_STATUS_SUCCESS); + + // Restart read on buffer + USART_ReadBuffer(AT91C_BASE_US0, + usartBuffers[usartCurrentBuffer], + DATABUFFERSIZE); + usartCurrentBuffer = 1 - usartCurrentBuffer; + AT91C_BASE_TC0->TC_CCR = AT91C_TC_CLKEN | AT91C_TC_SWTRG; + } +} + + +//------------------------------------------------------------------------------ +// Callbacks re-implementation +//------------------------------------------------------------------------------ +//------------------------------------------------------------------------------ +/// Invoked when the USB device leaves the Suspended state. By default, +/// configures the LEDs. +//------------------------------------------------------------------------------ +void USBDCallbacks_Resumed(void) +{ + // Initialize LEDs + LED_Configure(USBD_LEDPOWER); + LED_Set(USBD_LEDPOWER); + LED_Configure(USBD_LEDUSB); + LED_Clear(USBD_LEDUSB); + USBState = STATE_RESUME; +} + +//------------------------------------------------------------------------------ +/// Invoked when the USB device gets suspended. By default, turns off all LEDs. +//------------------------------------------------------------------------------ +void USBDCallbacks_Suspended(void) +{ + // Turn off LEDs + LED_Clear(USBD_LEDPOWER); + LED_Clear(USBD_LEDUSB); + USBState = STATE_SUSPEND; +} + + +//------------------------------------------------------------------------------ +/// Callback invoked when data has been received on the USB. +//------------------------------------------------------------------------------ +static void UsbDataReceived(unsigned int unused, + unsigned char status, + unsigned int received, + unsigned int remaining) +{ + // Check that data has been received successfully + if (status == USBD_STATUS_SUCCESS) { + + // Send data through USART + while (!USART_WriteBuffer(AT91C_BASE_US0, usbBuffer, received)); + AT91C_BASE_US0->US_IER = AT91C_US_TXBUFE; + + // Check if bytes have been discarded + if ((received == DATABUFFERSIZE) && (remaining > 0)) { + + TRACE_WARNING( + "UsbDataReceived: %u bytes discarded\n\r", + remaining); + } + } + else { + + TRACE_WARNING( "UsbDataReceived: Transfer error\n\r"); + } +} + +//------------------------------------------------------------------------------ +/// Handles interrupts coming from USART #0. +//------------------------------------------------------------------------------ +static void ISR_Usart0() +{ + unsigned int status = AT91C_BASE_US0->US_CSR; + unsigned short serialState; + + // If USB device is not configured, do nothing + if (USBD_GetState() != USBD_STATE_CONFIGURED) { + + AT91C_BASE_US0->US_IDR = 0xFFFFFFFF; + return; + } + + // Buffer has been read successfully + if ((status & AT91C_US_ENDRX) != 0) { + + // Disable timer + AT91C_BASE_TC0->TC_CCR = AT91C_TC_CLKDIS; + + // Send buffer through the USB + while (CDCDSerialDriver_Write(usartBuffers[usartCurrentBuffer], + DATABUFFERSIZE, 0, 0) != USBD_STATUS_SUCCESS); + + // Restart read on buffer + USART_ReadBuffer(AT91C_BASE_US0, + usartBuffers[usartCurrentBuffer], + DATABUFFERSIZE); + usartCurrentBuffer = 1 - usartCurrentBuffer; + + // Restart timer + AT91C_BASE_TC0->TC_CCR = AT91C_TC_CLKEN | AT91C_TC_SWTRG; + } + + // Buffer has been sent + if ((status & AT91C_US_TXBUFE) != 0) { + + // Restart USB read + CDCDSerialDriver_Read(usbBuffer, + DATABUFFERSIZE, + (TransferCallback) UsbDataReceived, + 0); + AT91C_BASE_US0->US_IDR = AT91C_US_TXBUFE; + } + + // Errors + serialState = CDCDSerialDriver_GetSerialState(); + + // Overrun + if ((status & AT91C_US_OVER) != 0) { + + TRACE_WARNING( "ISR_Usart0: Overrun\n\r"); + serialState |= CDCDSerialDriver_STATE_OVERRUN; + } + + // Framing error + if ((status & AT91C_US_FRAME) != 0) { + + TRACE_WARNING( "ISR_Usart0: Framing error\n\r"); + serialState |= CDCDSerialDriver_STATE_FRAMING; + } + + CDCDSerialDriver_SetSerialState(serialState); +} + +//------------------------------------------------------------------------------ +// Main +//------------------------------------------------------------------------------ + +//------------------------------------------------------------------------------ +/// Initializes drivers and start the USB <-> Serial bridge. +//------------------------------------------------------------------------------ +int main() +{ + TRACE_CONFIGURE(DBGU_STANDARD, 115200, BOARD_MCK); + printf("-- USB Device CDC Serial Project %s --\n\r", SOFTPACK_VERSION); + printf("-- %s\n\r", BOARD_NAME); + printf("-- Compiled: %s %s --\n\r", __DATE__, __TIME__); + + // If they are present, configure Vbus & Wake-up pins + PIO_InitializeInterrupts(0); + + // Configure USART + PIO_Configure(pins, PIO_LISTSIZE(pins)); + AT91C_BASE_PMC->PMC_PCER = 1 << AT91C_ID_US0; + AT91C_BASE_US0->US_IDR = 0xFFFFFFFF; + USART_Configure(AT91C_BASE_US0, + USART_MODE_ASYNCHRONOUS, + 115200, + BOARD_MCK); + USART_SetTransmitterEnabled(AT91C_BASE_US0, 1); + USART_SetReceiverEnabled(AT91C_BASE_US0, 1); + AIC_ConfigureIT(AT91C_ID_US0, 0, ISR_Usart0); + AIC_EnableIT(AT91C_ID_US0); + + // Configure timer 0 + AT91C_BASE_PMC->PMC_PCER = (1 << AT91C_ID_TC0); + AT91C_BASE_TC0->TC_CCR = AT91C_TC_CLKDIS; + AT91C_BASE_TC0->TC_IDR = 0xFFFFFFFF; + AT91C_BASE_TC0->TC_CMR = AT91C_TC_CLKS_TIMER_DIV5_CLOCK + | AT91C_TC_CPCSTOP + | AT91C_TC_CPCDIS + | AT91C_TC_WAVESEL_UP_AUTO + | AT91C_TC_WAVE; + AT91C_BASE_TC0->TC_RC = 0x00FF; + AT91C_BASE_TC0->TC_IER = AT91C_TC_CPCS; + AIC_ConfigureIT(AT91C_ID_TC0, 0, ISR_Timer0); + AIC_EnableIT(AT91C_ID_TC0); + + // BOT driver initialization + CDCDSerialDriver_Initialize(); + + // connect if needed + VBUS_CONFIGURE(); + + // Driver loop + while (1) { + + // Device is not configured + if (USBD_GetState() < USBD_STATE_CONFIGURED) { + + // Connect pull-up, wait for configuration + USBD_Connect(); + while (USBD_GetState() < USBD_STATE_CONFIGURED); + + // Start receiving data on the USART + usartCurrentBuffer = 0; + USART_ReadBuffer(AT91C_BASE_US0, usartBuffers[0], DATABUFFERSIZE); + USART_ReadBuffer(AT91C_BASE_US0, usartBuffers[1], DATABUFFERSIZE); + AT91C_BASE_US0->US_IER = AT91C_US_ENDRX + | AT91C_US_FRAME + | AT91C_US_OVER; + AT91C_BASE_TC0->TC_CCR = AT91C_TC_CLKEN | AT91C_TC_SWTRG; + + // Start receiving data on the USB + CDCDSerialDriver_Read(usbBuffer, + DATABUFFERSIZE, + (TransferCallback) UsbDataReceived, + 0); + } + if( USBState == STATE_SUSPEND ) { + TRACE_DEBUG("suspend !\n\r"); + LowPowerMode(); + USBState = STATE_IDLE; + } + if( USBState == STATE_RESUME ) { + // Return in normal MODE + TRACE_DEBUG("resume !\n\r"); + NormalPowerMode(); + USBState = STATE_IDLE; + } + } +} + diff --git a/usb-device-cdc-serial-project/obj/.empty b/usb-device-cdc-serial-project/obj/.empty new file mode 100644 index 0000000..e69de29 -- cgit v1.2.3