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-rw-r--r--digital/zigbit/common/print.c87
1 files changed, 87 insertions, 0 deletions
diff --git a/digital/zigbit/common/print.c b/digital/zigbit/common/print.c
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+/* print.c */
+/* Zigbit common functions for debug {{{
+ *
+ * Copyright (C) 2012 Florent Duchon
+ *
+ * APBTeam:
+ * Web: http://apbteam.org/
+ * Email: team AT apbteam DOT org
+ *
+ * This program 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 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ * }}} */
+
+#include <stdarg.h>
+#include <string.h>
+#include <usart.h>
+#include "configuration.h"
+#include "print.h"
+
+
+extern HAL_UsartDescriptor_t appUsartDescriptor; // USART descriptor (required by stack)
+extern uint8_t usartTxBuffer[APP_USART_TX_BUFFER_SIZE]; // USART Tx buffer
+
+
+static TUSART_buffer_level TXbuffer_level = EMPTY; // TX buffer state
+static TUSART_bus_state TXbus_state = FREE; // TX line state
+
+static uint16_t start_offset = 0; // Start offset for TX buffer
+static uint16_t end_offset = 0; // Stop offset for TX buffer
+
+
+/* TX USART Callback */
+void usartTXCallback(void)
+{
+ /* If buffer is not empty continue to send via USART line */
+ if(TXbuffer_level != EMPTY)
+ {
+ WRITE_USART(&appUsartDescriptor,usartTxBuffer+start_offset,end_offset);
+ TXbuffer_level = EMPTY;
+ }
+ else
+ {
+ /* Bus is free so reset variables and flags */
+ memset(usartTxBuffer,0,APP_USART_TX_BUFFER_SIZE);
+ start_offset = 0;
+ end_offset = 0;
+ TXbus_state = FREE;
+ }
+}
+
+/* This function sends data string via the USART interface */
+void uprintf(char *format, ...)
+{
+ va_list args;
+ va_start(args,format);
+
+ if(end_offset+strlen(format)+sizeof(args) < APP_USART_TX_BUFFER_SIZE)
+ {
+ vsprintf(usartTxBuffer+end_offset,format,args);
+ end_offset = strlen(usartTxBuffer);
+
+ /* Check if the bus is busy */
+ if(TXbus_state == FREE)
+ {
+ WRITE_USART(&appUsartDescriptor,usartTxBuffer+start_offset,end_offset);
+ start_offset = end_offset;
+ TXbus_state = BUSY;
+ }
+ else
+ {
+ TXbuffer_level = FILLED;
+ }
+ }
+ va_end(args);
+}