diff options
Diffstat (limited to 'usb-spi/usb-spi.c')
-rw-r--r-- | usb-spi/usb-spi.c | 398 |
1 files changed, 199 insertions, 199 deletions
diff --git a/usb-spi/usb-spi.c b/usb-spi/usb-spi.c index 1c000ed..6ae785a 100644 --- a/usb-spi/usb-spi.c +++ b/usb-spi/usb-spi.c @@ -1,199 +1,199 @@ -/*
- * 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/>.
- */
-
-#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/Version.h>
-#include <LUFA/Drivers/Peripheral/SPI.h>
-#include <LUFA/Drivers/Misc/RingBuffer.h>
-#include <LUFA/Drivers/USB/USB.h>
-#include "lufa-descriptor-usbserial.h"
-
- /* Global I/O Buffers: */
-static RingBuffer_t USBtoSPI_Buffer;
-static uint8_t USBtoSPI_Buffer_Data[128];
-static RingBuffer_t SPItoUSB_Buffer;
-static uint8_t SPItoUSB_Buffer_Data[128];
-
-/** LUFA CDC Class driver interface configuration and state information. This structure is
- * passed to all CDC Class driver functions, so that multiple instances of the same class
- * within a device can be differentiated from one another.
- */
-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 */
-
- /* Hardware Defines: */
-#define SPI_CS_DDR DDRB
-#define SPI_CS_PORT PORTB
-#define CS 0
-
-#define RESET_DDR DDRB
-#define RESET_PORT PORTB
-#define RESET 7
-
-void SetupHardware(void)
-{
- MCUSR &= ~(1 << WDRF);
- wdt_disable();
-
- cpu_init();
- led_init();
- USB_Init();
-
- TCCR0B = (1 << CS02);
-
- SPI_Init(SPI_SPEED_FCPU_DIV_16 | SPI_MODE_MASTER | SPI_ORDER_MSB_FIRST |
- SPI_SCK_LEAD_RISING | SPI_SAMPLE_LEADING);
- SPI_CS_DDR |= (1<<CS);
- SPI_CS_PORT |= (1<<CS);
-
- RESET_DDR |= (1<<RESET);
- RESET_PORT |= (1<<RESET);
-
-/* INT0 as input with pull-up */
- DDRD &= ~(1<<0);
- PORTD |= (1<<0);
- EICRA |= (1<<ISC01);
- EIFR |= (1<<INTF0);
- EIMSK |= (1<<INT0);
-}
-
-void EVENT_CDC_Device_ControLineStateChanged(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo)
-{
- if(CDCInterfaceInfo->State.ControlLineStates.HostToDevice & CDC_CONTROL_LINE_OUT_DTR)
- RESET_PORT &= ~(1<<RESET);
- else
- RESET_PORT |= (1<<RESET);
-}
-
-void EVENT_CDC_Device_BreakSent(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo, const uint8_t Duration)
-{
- SPI_CS_PORT ^= (1<<CS);
-}
-
-ISR(INT0_vect)
-{
- SPI_CS_PORT &= ~(1<<CS);
- led_on();
-
- uint8_t ReceivedByte = SPI_ReceiveByte();
- RingBuffer_Insert(&SPItoUSB_Buffer, ReceivedByte);
-
- led_off();
- SPI_CS_PORT |= (1<<CS);
-}
-
-void SPI_SendBuffer(void)
-{
- SPI_CS_PORT &= ~(1<<CS);
- led_on();
-
- while(!(RingBuffer_IsEmpty(&USBtoSPI_Buffer))) {
- SPI_SendByte(RingBuffer_Remove(&USBtoSPI_Buffer));
- }
-
- led_off();
- SPI_CS_PORT |= (1<<CS);
-}
-
-int main(void)
-{
- SetupHardware();
-
- RingBuffer_InitBuffer(&USBtoSPI_Buffer, USBtoSPI_Buffer_Data, sizeof(USBtoSPI_Buffer_Data));
- RingBuffer_InitBuffer(&SPItoUSB_Buffer, SPItoUSB_Buffer_Data, sizeof(SPItoUSB_Buffer_Data));
-
- sei();
-
- for (;;) {
- int16_t BytesReceived = CDC_Device_BytesReceived(&VirtualSerial_CDC_Interface);
- while(BytesReceived > 0) {
- if(!(RingBuffer_IsFull(&USBtoSPI_Buffer))) {
- int16_t ReceivedByte = CDC_Device_ReceiveByte(&VirtualSerial_CDC_Interface);
- if (!(ReceivedByte < 0))
- RingBuffer_Insert(&USBtoSPI_Buffer, ReceivedByte);
-
- BytesReceived--;
- }
- }
-
- uint16_t BufferCount = RingBuffer_GetCount(&SPItoUSB_Buffer);
- if ((TIFR0 & (1 << TOV0)) || (BufferCount > (uint8_t)(sizeof(SPItoUSB_Buffer_Data) * .75))) {
- TIFR0 |= (1 << TOV0);
- while (BufferCount--) {
- if (CDC_Device_SendByte(&VirtualSerial_CDC_Interface,
- RingBuffer_Peek(&SPItoUSB_Buffer)) != ENDPOINT_READYWAIT_NoError)
- break;
-
- RingBuffer_Remove(&SPItoUSB_Buffer);
- }
- }
-
- if (!(RingBuffer_IsEmpty(&USBtoSPI_Buffer)))
- SPI_SendBuffer();
-
- CDC_Device_USBTask(&VirtualSerial_CDC_Interface);
- USB_USBTask();
- }
-}
+/* + * 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/>. + */ + +#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/Version.h> +#include <LUFA/Drivers/Peripheral/SPI.h> +#include <LUFA/Drivers/Misc/RingBuffer.h> +#include <LUFA/Drivers/USB/USB.h> +#include "lufa-descriptor-usbserial.h" + + /* Global I/O Buffers: */ +static RingBuffer_t USBtoSPI_Buffer; +static uint8_t USBtoSPI_Buffer_Data[128]; +static RingBuffer_t SPItoUSB_Buffer; +static uint8_t SPItoUSB_Buffer_Data[128]; + +/** LUFA CDC Class driver interface configuration and state information. This structure is + * passed to all CDC Class driver functions, so that multiple instances of the same class + * within a device can be differentiated from one another. + */ +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 */ + + /* Hardware Defines: */ +#define SPI_CS_DDR DDRB +#define SPI_CS_PORT PORTB +#define CS 0 + +#define RESET_DDR DDRB +#define RESET_PORT PORTB +#define RESET 7 + +void SetupHardware(void) +{ + MCUSR &= ~(1 << WDRF); + wdt_disable(); + + cpu_init(); + led_init(); + USB_Init(); + + TCCR0B = (1 << CS02); + + SPI_Init(SPI_SPEED_FCPU_DIV_16 | SPI_MODE_MASTER | SPI_ORDER_MSB_FIRST | + SPI_SCK_LEAD_RISING | SPI_SAMPLE_LEADING); + SPI_CS_DDR |= (1<<CS); + SPI_CS_PORT |= (1<<CS); + + RESET_DDR |= (1<<RESET); + RESET_PORT |= (1<<RESET); + +/* INT0 as input with pull-up */ + DDRD &= ~(1<<0); + PORTD |= (1<<0); + EICRA |= (1<<ISC01); + EIFR |= (1<<INTF0); + EIMSK |= (1<<INT0); +} + +void EVENT_CDC_Device_ControLineStateChanged(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo) +{ + if(CDCInterfaceInfo->State.ControlLineStates.HostToDevice & CDC_CONTROL_LINE_OUT_DTR) + RESET_PORT &= ~(1<<RESET); + else + RESET_PORT |= (1<<RESET); +} + +void EVENT_CDC_Device_BreakSent(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo, const uint8_t Duration) +{ + SPI_CS_PORT ^= (1<<CS); +} + +ISR(INT0_vect) +{ + SPI_CS_PORT &= ~(1<<CS); + led_on(); + + uint8_t ReceivedByte = SPI_ReceiveByte(); + RingBuffer_Insert(&SPItoUSB_Buffer, ReceivedByte); + + led_off(); + SPI_CS_PORT |= (1<<CS); +} + +void SPI_SendBuffer(void) +{ + SPI_CS_PORT &= ~(1<<CS); + led_on(); + + while(!(RingBuffer_IsEmpty(&USBtoSPI_Buffer))) { + SPI_SendByte(RingBuffer_Remove(&USBtoSPI_Buffer)); + } + + led_off(); + SPI_CS_PORT |= (1<<CS); +} + +int main(void) +{ + SetupHardware(); + + RingBuffer_InitBuffer(&USBtoSPI_Buffer, USBtoSPI_Buffer_Data, sizeof(USBtoSPI_Buffer_Data)); + RingBuffer_InitBuffer(&SPItoUSB_Buffer, SPItoUSB_Buffer_Data, sizeof(SPItoUSB_Buffer_Data)); + + sei(); + + for (;;) { + int16_t BytesReceived = CDC_Device_BytesReceived(&VirtualSerial_CDC_Interface); + while(BytesReceived > 0) { + if(!(RingBuffer_IsFull(&USBtoSPI_Buffer))) { + int16_t ReceivedByte = CDC_Device_ReceiveByte(&VirtualSerial_CDC_Interface); + if (!(ReceivedByte < 0)) + RingBuffer_Insert(&USBtoSPI_Buffer, ReceivedByte); + + BytesReceived--; + } + } + + uint16_t BufferCount = RingBuffer_GetCount(&SPItoUSB_Buffer); + if ((TIFR0 & (1 << TOV0)) || (BufferCount > (uint8_t)(sizeof(SPItoUSB_Buffer_Data) * .75))) { + TIFR0 |= (1 << TOV0); + while (BufferCount--) { + if (CDC_Device_SendByte(&VirtualSerial_CDC_Interface, + RingBuffer_Peek(&SPItoUSB_Buffer)) != ENDPOINT_READYWAIT_NoError) + break; + + RingBuffer_Remove(&SPItoUSB_Buffer); + } + } + + if (!(RingBuffer_IsEmpty(&USBtoSPI_Buffer))) + SPI_SendBuffer(); + + CDC_Device_USBTask(&VirtualSerial_CDC_Interface); + USB_USBTask(); + } +} |