Diff: HSP/RpcServer/RpcFifo.cpp

Revision:

0:e4a10ed6eb92

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/HSP/RpcServer/RpcFifo.cpp	Tue Oct 25 15:22:11 2016 +0000
@@ -0,0 +1,253 @@
+/*******************************************************************************
+ * Copyright (C) 2016 Maxim Integrated Products, Inc., All Rights Reserved.
+ *
+ * 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 MAXIM INTEGRATED 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.
+ *
+ * Except as contained in this notice, the name of Maxim Integrated
+ * Products, Inc. shall not be used except as stated in the Maxim Integrated
+ * Products, Inc. Branding Policy.
+ *
+ * The mere transfer of this software does not imply any licenses
+ * of trade secrets, proprietary technology, copyrights, patents,
+ * trademarks, maskwork rights, or any other form of intellectual
+ * property whatsoever. Maxim Integrated Products, Inc. retains all
+ * ownership rights.
+ *******************************************************************************
+ */
+#include "mbed.h"
+#include "RpcFifo.h"
+
+/****************************************************************************/
+void fifo_init(fifo_t *fifo, void *mem, unsigned int length) {
+  // atomic FIFO access
+  __disable_irq();
+
+  fifo->rindex = 0;
+  fifo->windex = 0;
+  fifo->data = mem;
+  fifo->length = length;
+
+  __enable_irq();
+}
+
+/****************************************************************************/
+int fifo_put8(fifo_t *fifo, uint8_t element) {
+  // Check if FIFO is full
+  if ((fifo->windex == (fifo->rindex - 1)) ||
+      ((fifo->rindex == 0) && (fifo->windex == (fifo->length - 1)))) {
+    return -1;
+  }
+
+  // atomic FIFO access
+  __disable_irq();
+
+  // Put data into FIFO
+  ((uint8_t *)(fifo->data))[fifo->windex] = element;
+
+  // Increment pointer
+  fifo->windex++;
+  if (fifo->windex == fifo->length) {
+    fifo->windex = 0;
+  }
+
+  __enable_irq();
+
+  return 0;
+}
+
+/****************************************************************************/
+int fifo_get8(fifo_t *fifo, uint8_t *element) {
+  // Check if FIFO is empty
+  if (fifo->rindex == fifo->windex)
+    return -1;
+
+  // atomic FIFO access
+  __disable_irq();
+
+  // Get data from FIFO
+  *element = ((uint8_t *)(fifo->data))[fifo->rindex];
+
+  // Increment pointer
+  fifo->rindex++;
+  if (fifo->rindex == fifo->length) {
+    fifo->rindex = 0;
+  }
+
+  __enable_irq();
+
+  return 0;
+}
+
+/****************************************************************************/
+int fifo_put16(fifo_t *fifo, uint16_t element) {
+  // Check if FIFO is full
+  if ((fifo->windex == (fifo->rindex - 1)) ||
+      ((fifo->rindex == 0) && (fifo->windex == (fifo->length - 1)))) {
+    return -1;
+  }
+
+  // atomic FIFO access
+  __disable_irq();
+
+  // Put data into FIFO
+  ((uint16_t *)(fifo->data))[fifo->windex] = element;
+
+  // Increment pointer
+  fifo->windex++;
+  if (fifo->windex == fifo->length) {
+    fifo->windex = 0;
+  }
+
+  __enable_irq();
+
+  return 0;
+}
+
+/****************************************************************************/
+int fifo_get16(fifo_t *fifo, uint16_t *element) {
+  // Check if FIFO is empty
+  if (fifo->rindex == fifo->windex)
+    return -1;
+
+  // atomic FIFO access
+  __disable_irq();
+
+  // Get data from FIFO
+  *element = ((uint16_t *)(fifo->data))[fifo->rindex];
+
+  // Increment pointer
+  fifo->rindex++;
+  if (fifo->rindex == fifo->length) {
+    fifo->rindex = 0;
+  }
+
+  __enable_irq();
+
+  return 0;
+}
+
+/****************************************************************************/
+int fifo_put32(fifo_t *fifo, uint32_t element) {
+  // Check if FIFO is full
+  if ((fifo->windex == (fifo->rindex - 1)) ||
+      ((fifo->rindex == 0) && (fifo->windex == (fifo->length - 1)))) {
+    return -1;
+  }
+
+  // atomic FIFO access
+  __disable_irq();
+
+  // Put data into FIFO
+  ((uint32_t *)(fifo->data))[fifo->windex] = element;
+
+  // Increment pointer
+  fifo->windex++;
+  if (fifo->windex == fifo->length) {
+    fifo->windex = 0;
+  }
+
+  __enable_irq();
+
+  return 0;
+}
+
+/****************************************************************************/
+int fifo_get32(fifo_t *fifo, uint32_t *element) {
+  // Check if FIFO is empty
+  if (fifo->rindex == fifo->windex)
+    return -1;
+
+  // atomic FIFO access
+  __disable_irq();
+
+  // Get data from FIFO
+  *element = ((uint32_t *)(fifo->data))[fifo->rindex];
+
+  // Increment pointer
+  fifo->rindex++;
+  if (fifo->rindex == fifo->length) {
+    fifo->rindex = 0;
+  }
+
+  __enable_irq();
+
+  return 0;
+}
+/****************************************************************************/
+void fifo_clear(fifo_t *fifo) {
+  // atomic FIFO access
+  __disable_irq();
+
+  fifo->rindex = 0;
+  fifo->windex = 0;
+
+  __enable_irq();
+}
+
+/****************************************************************************/
+int fifo_empty(fifo_t *fifo) { return (fifo->rindex == fifo->windex); }
+
+/****************************************************************************/
+int fifo_full(fifo_t *fifo) {
+  int retval;
+
+  // atomic FIFO access
+  __disable_irq();
+  retval = ((fifo->windex == (fifo->rindex - 1)) ||
+            ((fifo->rindex == 0) && (fifo->windex == (fifo->length - 1))));
+  __enable_irq();
+
+  return retval;
+}
+
+/****************************************************************************/
+unsigned int fifo_level(fifo_t *fifo) {
+  uint16_t value;
+
+  // atomic FIFO access
+  __disable_irq();
+
+  if (fifo->windex >= fifo->rindex) {
+    value = fifo->windex - fifo->rindex;
+  } else {
+    value = fifo->length - fifo->rindex + fifo->windex;
+  }
+
+  __enable_irq();
+
+  return value;
+}
+
+/****************************************************************************/
+unsigned int fifo_remaining(fifo_t *fifo) {
+  uint16_t value;
+
+  // atomic FIFO access
+  __disable_irq();
+
+  if (fifo->rindex > fifo->windex) {
+    value = fifo->rindex - fifo->windex - 1;
+  } else {
+    value = fifo->length - fifo->windex + fifo->rindex - 1;
+  }
+
+  __enable_irq();
+
+  return value;
+}