1 files changed, 0 insertions, 61 deletions
diff --git a/arduino/ace_old/physical.c b/arduino/ace_old/physical.c
deleted file mode 100644
index 17e15d7..0000000
--- a/arduino/ace_old/physical.c
+++ /dev/null
@@ -1,61 +0,0 @@
-#include "physical.h"
-#include "link.h"
-
-#include <avr/interrupt.h>
-
-typedef struct {
-  uint8_t buffer[SERIAL_BUFFER_SIZE];
-  volatile uint16_t head;
-  volatile uint16_t tail;
-} ring_buffer;
-
-static ring_buffer tx_buffer = {{0}, 0, 0};
-
-
-void init_physical_layer(uint32_t baud) {
-  //enable double speed transmission
-  UCSR0A |= (1 << U2X0);
-
-  uint16_t baud_setting = (F_CPU / 4 / baud - 1) / 2;
-  // assign the baud_setting, a.k.a. ubbr (USART Baud Rate Register)
-  UBRR0H = baud_setting >> 8;
-  UBRR0L = baud_setting;
-  
-  // defaults to 8-bit, no parity, 1 stop bit
-  UCSR0B |= (1 << RXEN0) | (1 << TXEN0) | (1 << RXCIE0);
-  UCSR0B &= ~(1 << UDRIE0) | (1 << TXEN0) | (1 << RXCIE0);
-}
-
-
-//receive
-ISR(USART0_RX_vect) {
-  uint8_t c = UDR0;
-  from_physical_layer(c);
-}
-
-//data register empty
-ISR(USART0_UDRE_vect) {
-  if (tx_buffer.head == tx_buffer.tail) {
-    //buffer empty, disable interruot
-    UCSR0B &= ~(1 << UDRIE0);
-  } else {
-    uint8_t c = tx_buffer.buffer[tx_buffer.tail];
-    tx_buffer.tail = (tx_buffer.tail + 1) % SERIAL_BUFFER_SIZE;
-    UDR0 = c; //write next byte
-  }
-}
-
-void to_physical_layer(uint8_t byte) {
-  uint16_t i = (tx_buffer.head + 1) % SERIAL_BUFFER_SIZE;
-	
-  // If the output buffer is full, there's nothing for it other than to 
-  // wait for the interrupt handler to empty it a bit
-if (i == tx_buffer.tail) return;
-  //while (i == tx_buffer.tail) {};
-	
-  tx_buffer.buffer[tx_buffer.head] = byte;
-  tx_buffer.head = i;
-	
-	//enable data register empty interrupt
-	UCSR0B |= (1 << UDRIE0);
-};