testpico: check busy after dma

[megadrive.git] / teensy3 / usb_mem.c

diff --git a/teensy3/usb_mem.c b/teensy3/usb_mem.c
deleted file mode 100644 (file)
index c6e902a..0000000
--- a/teensy3/usb_mem.c
+++ /dev/null
@@ -1,106 +0,0 @@
-/* Teensyduino Core Library
- * http://www.pjrc.com/teensy/
- * Copyright (c) 2013 PJRC.COM, LLC.
- *
- * 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:
- *
- * 1. The above copyright notice and this permission notice shall be 
- * included in all copies or substantial portions of the Software.
- *
- * 2. If the Software is incorporated into a build system that allows 
- * selection among a list of target devices, then similar target
- * devices manufactured by PJRC.COM must be included in the list of
- * target devices and selectable in the same manner.
- *
- * 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 "mk20dx128.h"
-//#include "HardwareSerial.h"
-#include "usb_dev.h"
-#include "usb_mem.h"
-
-__attribute__ ((section(".usbbuffers"), used))
-unsigned char usb_buffer_memory[NUM_USB_BUFFERS * sizeof(usb_packet_t)];
-
-static uint32_t usb_buffer_available = 0xFFFFFFFF;
-
-// use bitmask and CLZ instruction to implement fast free list
-// http://www.archivum.info/gnu.gcc.help/2006-08/00148/Re-GCC-Inline-Assembly.html
-// http://gcc.gnu.org/ml/gcc/2012-06/msg00015.html
-// __builtin_clz()
-
-usb_packet_t * usb_malloc(void)
-{
-       unsigned int n, avail;
-       uint8_t *p;
-
-       __disable_irq();
-       avail = usb_buffer_available;
-       n = __builtin_clz(avail); // clz = count leading zeros
-       if (n >= NUM_USB_BUFFERS) {
-               __enable_irq();
-               return NULL;
-       }
-       //serial_print("malloc:");
-       //serial_phex(n);
-       //serial_print("\n");
-
-       usb_buffer_available = avail & ~(0x80000000 >> n);
-       __enable_irq();
-       p = usb_buffer_memory + (n * sizeof(usb_packet_t));
-       //serial_print("malloc:");
-       //serial_phex32((int)p);
-       //serial_print("\n");
-       *(uint32_t *)p = 0;
-       *(uint32_t *)(p + 4) = 0;
-       return (usb_packet_t *)p;
-}
-
-// for the receive endpoints to request memory
-extern uint8_t usb_rx_memory_needed;
-extern void usb_rx_memory(usb_packet_t *packet);
-
-void usb_free(usb_packet_t *p)
-{
-       unsigned int n, mask;
-
-       //serial_print("free:");
-       n = ((uint8_t *)p - usb_buffer_memory) / sizeof(usb_packet_t);
-       if (n >= NUM_USB_BUFFERS) return;
-       //serial_phex(n);
-       //serial_print("\n");
-
-       // if any endpoints are starving for memory to receive
-       // packets, give this memory to them immediately!
-       if (usb_rx_memory_needed && usb_configuration) {
-               //serial_print("give to rx:");
-               //serial_phex32((int)p);
-               //serial_print("\n");
-               usb_rx_memory(p);
-               return;
-       }
-
-       mask = (0x80000000 >> n);
-       __disable_irq();
-       usb_buffer_available |= mask;
-       __enable_irq();
-
-       //serial_print("free:");
-       //serial_phex32((int)p);
-       //serial_print("\n");
-}
-