From 547d352d5275345cd9c5a3948018f7158adf253a Mon Sep 17 00:00:00 2001
From: Christian Pointner <equinox@spreadspace.org>
Date: Wed, 30 May 2012 14:16:47 +0000
Subject: usb-spi now uses LUFA spi

git-svn-id: https://svn.spreadspace.org/avr/trunk@49 aa12f405-d877-488e-9caf-2d797e2a1cc7
---
 usb-spi/usb-spi.c | 124 +++++++++++++++++++++---------------------------------
 1 file changed, 48 insertions(+), 76 deletions(-)

(limited to 'usb-spi')

diff --git a/usb-spi/usb-spi.c b/usb-spi/usb-spi.c
index 513df00..66c3671 100644
--- a/usb-spi/usb-spi.c
+++ b/usb-spi/usb-spi.c
@@ -72,27 +72,16 @@
 #include "led.h"
 
 #include <LUFA/Version.h>
+#include <LUFA/Drivers/Peripheral/SPI.h>
 #include <LUFA/Drivers/Misc/RingBuffer.h>
 #include <LUFA/Drivers/USB/USB.h>
 
     /* Hardware Defines: */
-#define SPI_DDR DDRB
-#define SPI_PORT PORTB
-#define SPI_PINB_REG  PINB
+#define SPI_CS_DDR DDRB
+#define SPI_CS_PORT PORTB
 #define CS   0
-#define SCK  1
-#define MOSI 2
-#define MISO 3
-
-    /* Function Prototypes: */
-void SetupHardware(void);
-void SPI_TransferBuffer(void);
-
-void EVENT_USB_Device_Connect(void);
-void EVENT_USB_Device_Disconnect(void);
-void EVENT_USB_Device_ConfigurationChanged(void);
-void EVENT_USB_Device_ControlRequest(void);
 
+    /* Global I/O Buffers: */
 static RingBuffer_t USBtoSPI_Buffer;
 static uint8_t      USBtoSPI_Buffer_Data[128];
 static RingBuffer_t SPItoUSB_Buffer;
@@ -122,6 +111,50 @@ USB_ClassInfo_CDC_Device_t VirtualSerial_CDC_Interface =
       },
   };
 
+void SetupHardware(void)
+{
+  MCUSR &= ~(1 << WDRF);
+  wdt_disable();
+
+  cpu_init();
+  led_init();
+  USB_Init();
+
+  TCCR0B = (1 << CS02);
+
+  SPI_CS_DDR |= (1<<CS);
+  SPI_CS_PORT |= (1<<CS);
+  SPI_Init(SPI_SPEED_FCPU_DIV_4  | SPI_MODE_MASTER | SPI_ORDER_MSB_FIRST | 
+           SPI_SCK_LEAD_RISING | SPI_SAMPLE_LEADING);
+}
+
+void SPI_TransferBuffer()
+{
+  SPI_CS_PORT &= ~(1<<CS);
+  led_on();
+
+  while(!(RingBuffer_IsEmpty(&USBtoSPI_Buffer))) {
+    uint8_t ReceivedByte = SPI_TransferByte(RingBuffer_Remove(&USBtoSPI_Buffer));
+    if (USB_DeviceState == DEVICE_STATE_Configured) {
+      RingBuffer_Insert(&SPItoUSB_Buffer, ReceivedByte);
+      if(RingBuffer_IsFull(&USBtoSPI_Buffer))
+        break;
+    }
+  }
+
+  led_off();
+  SPI_CS_PORT |= (1<<CS);
+}
+
+void EVENT_USB_Device_ConfigurationChanged(void)
+{
+  CDC_Device_ConfigureEndpoints(&VirtualSerial_CDC_Interface);
+}
+
+void EVENT_USB_Device_ControlRequest(void)
+{
+  CDC_Device_ProcessControlRequest(&VirtualSerial_CDC_Interface);
+}
 
 int main(void)
 {
@@ -163,64 +196,3 @@ int main(void)
     USB_USBTask();
   }
 }
-
-void SetupHardware(void)
-{
-  MCUSR &= ~(1 << WDRF);
-  wdt_disable();
-
-  cpu_init();
-  led_init();
-  USB_Init();
-
-  TCCR0B = (1 << CS02);
-
-  SPI_DDR = (1<<MOSI)|(1<<SCK)|(1<<CS);
-  SPI_PORT = (1<<CS);
-  SPCR = (1<<SPE)|(1<<MSTR);
-}
-
-void SPI_TransferBuffer()
-{
-  SPI_PORT &= ~(1<<CS);
-
-  while(!(RingBuffer_IsEmpty(&USBtoSPI_Buffer))) {
-    SPDR = RingBuffer_Remove(&USBtoSPI_Buffer);
-    while(!(SPSR & (1<<SPIF)));
-
-    uint8_t ReceivedByte = SPDR;
-    if (USB_DeviceState == DEVICE_STATE_Configured) {
-      RingBuffer_Insert(&SPItoUSB_Buffer, ReceivedByte);
-      if(RingBuffer_IsFull(&USBtoSPI_Buffer))
-        break;
-    }
-  }
-
-  SPI_PORT |= (1<<CS);
-}
-
-void EVENT_USB_Device_Connect(void)
-{
-  led_on();
-}
-
-void EVENT_USB_Device_Disconnect(void)
-{
-  led_off();
-}
-
-void EVENT_USB_Device_ConfigurationChanged(void)
-{
-  bool ConfigSuccess = true;
-
-  ConfigSuccess &= CDC_Device_ConfigureEndpoints(&VirtualSerial_CDC_Interface);
-
-  led_toggle();
-  _delay_ms(10);
-  led_toggle();
-}
-
-void EVENT_USB_Device_ControlRequest(void)
-{
-  CDC_Device_ProcessControlRequest(&VirtualSerial_CDC_Interface);
-}
-- 
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