I have ported my old project “pNesX” game console emulator to the nucleo.

Dependencies:   SDFileSystem mbed

Intro

I have ported my old project “pNesX” to the STM32 Nucleo. The pNesX is a NES emulator for the PlayStation that I have created 16 years ago!

Emulation part was almost without change, the sound part was newly added.

Parts

STM32 Nucleo F446RE
QVGA 2.2 TFT SPI (with the SD card slot)
Audio jack(TS or TRS)
USB Connector
Register 100k, 10k, 4.7k, 100
Capacitor 0.01uF, 2.2uF
Breadboard
Wires
Computer Speakers
USB GamePad

Wiring diagram

/media/uploads/beaglescout007/nucleo_ex06_emu.png

TFT J2Nucleo
VCC3V3
GNDGND
CSPB_5(D4)
ResetPA_10(D2) Pull Up(100k)
D/CPA_8(D7)
MOSIPA_7(D11)
SCKPA_5(D13)
LEDLED-100ohm-3V3
MISOPA_6(D12)
TFT J4Nucleo
SD_CSPA_9
SD_MOSIPB_15
SD_MISOPB_14
SD_SCKPB_13
AudioNucleo
TIPPA_4(A2)
USB con.Nucleo
GNDGND
+PA_12
-PA_11
5V5V

https://youtu.be/jL24IjT6LnI

Limitations

  • Since the rest of the RAM is about 50kbyte, maximum capacity of the game ROM is about 50kbyte.
  • The length of the file name up to 32 characters.
  • The number of files in the folder is up to 100.

Used Library

Revision:
0:3dac1f1bc9e0
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/USBHost/dbg.h	Sun Apr 03 07:45:29 2016 +0000
@@ -0,0 +1,91 @@
+/* mbed USBHost Library
+ * Copyright (c) 2006-2013 ARM Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef USB_DEBUG_H
+#define USB_DEBUG_H
+
+//Debug is disabled by default
+#ifndef DEBUG
+//#define DEBUG 3 /*INFO,ERR,WARN*/
+#define DEBUG 0
+#endif
+#ifndef DEBUG2
+#define DEBUG2 0
+#endif
+#define DEBUG_TRANSFER 0
+#define DEBUG_EP_STATE 0
+#define DEBUG_EVENT 0
+
+#if (DEBUG > 3)
+#define USB_DBG(...) do{fprintf(stderr,"[%s@%d] ",__PRETTY_FUNCTION__,__LINE__);fprintf(stderr,__VA_ARGS__);fprintf(stderr,"\r\n");} while(0);
+//#define USB_DBG(x, ...) std::printf("[USB_DBG: %s:%d]" x "\r\n", __FILE__, __LINE__, ##__VA_ARGS__);
+#define USB_DBG_HEX(A,B) debug_hex(A,B)
+extern void debug_hex(uint8_t* buf, int size);
+#define USB_DBG_ERRSTAT() report.print_errstat();
+#else
+#define USB_DBG(x, ...)
+#define USB_DBG_HEX(A,B) while(0)
+#define USB_DBG_ERRSTAT() while(0)
+#endif
+
+#if (DEBUG2 > 3)
+#define USB_DBG2(...) do{fprintf(stderr,"[%s@%d] ",__PRETTY_FUNCTION__,__LINE__);fprintf(stderr,__VA_ARGS__);fprintf(stderr,"\r\n");} while(0);
+#else
+#define USB_DBG2(...)  while(0);
+#endif
+
+#if (DEBUG > 2)
+#define USB_INFO(...) do{fprintf(stderr,__VA_ARGS__);fprintf(stderr,"\r\n");}while(0);
+//#define USB_INFO(x, ...) std::printf("[USB_INFO: %s:%d]" x "\r\n", __FILE__, __LINE__, ##__VA_ARGS__);
+#else
+#define USB_INFO(x, ...)
+#endif
+
+#if (DEBUG > 1)
+#define USB_WARN(x, ...) std::printf("[USB_WARNING: %s:%d]" x "\r\n", __FILE__, __LINE__, ##__VA_ARGS__);
+#else
+#define USB_WARN(x, ...)
+#endif
+
+#if (DEBUG > 0)
+#define USB_ERR(x, ...) std::printf("[USB_ERR: %s:%d]" x "\r\n", __FILE__, __LINE__, ##__VA_ARGS__);
+#else
+#define USB_ERR(x, ...)
+#endif
+
+#if (DEBUG_TRANSFER)
+#define USB_DBG_TRANSFER(x, ...) std::printf("[USB_TRANSFER: %s:%d]" x "\r\n", __FILE__, __LINE__, ##__VA_ARGS__);
+#else
+#define USB_DBG_TRANSFER(x, ...)
+#endif
+
+#if (DEBUG_EVENT)
+#define USB_DBG_EVENT(x, ...) std::printf("[USB_EVENT: %s:%d]" x "\r\n", __FILE__, __LINE__, ##__VA_ARGS__);
+#else
+#define USB_DBG_EVENT(x, ...)
+#endif
+
+#ifdef _USB_TEST
+#define USB_TEST_ASSERT(A) while(!(A)){fprintf(stderr,"\n\n%s@%d %s ASSERT!\n\n",__PRETTY_FUNCTION__,__LINE__,#A);exit(1);};
+#define USB_TEST_ASSERT_FALSE(A) USB_TEST_ASSERT(!(A))
+#else
+#define USB_TEST_ASSERT(A) while(0)
+#define USB_TEST_ASSERT_FALSE(A) while(0)
+#endif
+
+#endif
+
+