Added demo port for BACnetDevelopmentKit.com board.

2009-05-04 22:14:45 +00:00
parent 68bdca6fbe
commit eb06ee919a
30 changed files with 5632 additions and 0 deletions
@@ -0,0 +1,173 @@
+/**************************************************************************
+*
+* Copyright (C) 2009 Steve Karg <skarg@users.sourceforge.net>
+*
+* Permission is hereby granted, free of charge, to any person obtaining
+* a copy of this software and associated documentation files (the
+* "Software"), to deal in the Software without restriction, including
+* without limitation the rights to use, copy, modify, merge, publish,
+* distribute, sublicense, and/or sell copies of the Software, and to
+* permit persons to whom the Software is furnished to do so, subject to
+* the following conditions:
+*
+* The above copyright notice and this permission notice shall be included
+* in all copies or substantial portions of the Software.
+*
+* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+*********************************************************************/
+#include <stdbool.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include "hardware.h"
+#include "fifo.h"
+#include "serial.h"
+
+/* baud rate */
+static uint32_t Baud_Rate = 9600;
+
+/* buffer for storing received bytes - size must be power of two */
+static uint8_t Receive_Buffer_Data[128];
+static FIFO_BUFFER Receive_Buffer;
+
+static void serial_receiver_enable(void)
+{
+    UCSR0B = _BV(TXEN0) | _BV(RXEN0) | _BV(RXCIE0);
+}
+
+ISR(USART1_RX_vect)
+{
+    uint8_t data_byte;
+
+    if (BIT_CHECK(UCSR1A, RXC1)) {
+        /* data is available */
+        data_byte = UDR1;
+        (void)FIFO_Put(&Receive_Buffer, data_byte);
+    }
+}
+
+bool serial_byte_get(
+    uint8_t * data_register)
+{
+    bool data_available = false; /* return value */
+
+    if (!FIFO_Empty(&Receive_Buffer)) {
+        *data_register = FIFO_Get(&Receive_Buffer);
+        data_available = true;
+    }
+
+    return data_available;
+}
+
+bool serial_byte_peek(
+    uint8_t * data_register)
+{
+    bool data_available = false; /* return value */
+
+    if (!FIFO_Empty(&Receive_Buffer)) {
+        *data_register = FIFO_Peek(&Receive_Buffer);
+        data_available = true;
+    }
+
+    return data_available;
+}
+
+void serial_bytes_send(
+    uint8_t * buffer, /* data to send */
+    uint16_t nbytes) /* number of bytes of data */
+{
+    while (!BIT_CHECK(UCSR1A, UDRE1)) {
+        /* do nothing - wait until Tx buffer is empty */
+    }
+    while (nbytes) {
+        /* Send the data byte */
+        UDR1 = *buffer;
+        while (!BIT_CHECK(UCSR1A, UDRE1)) {
+            /* do nothing - wait until Tx buffer is empty */
+        }
+        buffer++;
+        nbytes--;
+    }
+    /* was the frame sent? */
+    while (!BIT_CHECK(UCSR1A, TXC1)) {
+        /* do nothing - wait until the entire frame in the
+           Transmit Shift Register has been shifted out */
+    }
+    /* Clear the Transmit Complete flag by writing a one to it. */
+    BIT_SET(UCSR1A, TXC1);
+
+    return;
+}
+
+void serial_byte_send(uint8_t ch)
+{
+    uint8_t buffer[1];
+    
+    buffer[0] = ch;
+    serial_bytes_send(&buffer[0], 1);
+
+    return;
+}
+
+uint32_t serial_baud_rate(
+    void)
+{
+    return Baud_Rate;
+}
+
+bool serial_baud_rate_set(
+    uint32_t baud)
+{
+    bool valid = true;
+
+    switch (baud) {
+        case 9600:
+        case 19200:
+        case 38400:
+        case 57600:
+        case 76800:
+        case 115200:
+            Baud_Rate = baud;
+            /* 2x speed mode */
+            BIT_SET(UCSR1A, U2X1);
+            /* configure baud rate */
+            UBRR1 = (F_CPU / (8UL * Baud_Rate)) - 1;
+            /* FIXME: store the baud rate */
+            break;
+        default:
+            valid = false;
+            break;
+    }
+
+    return valid;
+}
+
+static void serial_usart_init(void)
+{
+    /* enable Transmit and Receive */
+    UCSR1B = _BV(TXEN1) | _BV(RXEN1);
+    /* Set USART Control and Status Register n C */
+    /* Asynchronous USART 8-bit data, No parity, 1 stop */
+    /* Set USART Mode Select: UMSELn1 UMSELn0 = 00 for Asynchronous USART */
+    /* Set Parity Mode:  UPMn1 UPMn0 = 00 for Parity Disabled */
+    /* Set Stop Bit Select: USBSn = 0 for 1 stop bit */
+    /* Set Character Size: UCSZn2 UCSZn1 UCSZn0 = 011 for 8-bit */
+    /* Clock Polarity: UCPOLn = 0 when asynchronous mode is used. */
+    UCSR0C = _BV(UCSZ11) | _BV(UCSZ10);
+    /* Clear Power Reduction */
+    BIT_CLEAR(PRR, PRUSART1);
+}
+
+void serial_init(void)
+{
+    FIFO_Init(&Receive_Buffer, &Receive_Buffer_Data[0],
+        (unsigned)sizeof(Receive_Buffer_Data));
+    serial_usart_init();
+    serial_baud_rate_set(Baud_Rate);
+    serial_receiver_enable();
+}