aboutsummaryrefslogtreecommitdiff
path: root/arduino/ace_cpp_old/SafeSerial.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'arduino/ace_cpp_old/SafeSerial.cpp')
-rw-r--r--arduino/ace_cpp_old/SafeSerial.cpp59
1 files changed, 0 insertions, 59 deletions
diff --git a/arduino/ace_cpp_old/SafeSerial.cpp b/arduino/ace_cpp_old/SafeSerial.cpp
deleted file mode 100644
index bab930e..0000000
--- a/arduino/ace_cpp_old/SafeSerial.cpp
+++ /dev/null
@@ -1,59 +0,0 @@
-#include "SafeSerial.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};
-
-SafeSerial::begin(uint32_t baud) {
- //enable double speed transmission
- *ucsrXa |= (1 << u2xX);
-
- uint16_t baudSetting = (F_CPU / 4 / baud - 1) / 2;
- // assign the baud_setting, a.k.a. ubbr (USART Baud Rate Register)
- *ubrrXh = baudSetting >> 8;
- *ubrrXl = baudSetting;
-
- // defaults to 8-bit, no parity, 1 stop bit
- *ucsrXb |= (1 << *exenX) | (1 << *txenX) | (1 << *rxcieX);
- *ucsrXb &= ~(1 << *udrieX) | (1 << *txenX) | (1 << *rxcieX);
-}
-
-
-//receive
-ISR(USART0_RX_vect) {
- uint8_t c = UDR0;
- serial.put(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 SafeSerial::send(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);
-};