woodstock . / Mbed 2 deprecated Nucleo_Ex06_EMU

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

pspad.cpp@0:3dac1f1bc9e0, 2016-04-03 (annotated)

Committer:
beaglescout007
Date:
Sun Apr 03 07:45:29 2016 +0000
Revision:
0:3dac1f1bc9e0
Release

Who changed what in which revision?

UserRevisionLine numberNew contents of line
beaglescout007 0:3dac1f1bc9e0 1 /*===================================================================*/
beaglescout007 0:3dac1f1bc9e0 2 /* */
beaglescout007 0:3dac1f1bc9e0 3 /* pspad.cpp : PS Pad function */
beaglescout007 0:3dac1f1bc9e0 4 /* */
beaglescout007 0:3dac1f1bc9e0 5 /* 2016/1/20 Racoon */
beaglescout007 0:3dac1f1bc9e0 6 /* */
beaglescout007 0:3dac1f1bc9e0 7 /*===================================================================*/
beaglescout007 0:3dac1f1bc9e0 8
beaglescout007 0:3dac1f1bc9e0 9 #include "mbed.h"
beaglescout007 0:3dac1f1bc9e0 10 #include "pspad.h"
beaglescout007 0:3dac1f1bc9e0 11
beaglescout007 0:3dac1f1bc9e0 12 // SPI interface
beaglescout007 0:3dac1f1bc9e0 13 SPI pad_spi(PC_12, PC_11, PC_10); // MOSI(should pullup), MISO, SCK
beaglescout007 0:3dac1f1bc9e0 14 DigitalOut pad1_cs(PD_2);
beaglescout007 0:3dac1f1bc9e0 15
beaglescout007 0:3dac1f1bc9e0 16 // PS pad initialize
beaglescout007 0:3dac1f1bc9e0 17 void pspad_init()
beaglescout007 0:3dac1f1bc9e0 18 {
beaglescout007 0:3dac1f1bc9e0 19 pad_spi.format(8, 3);
beaglescout007 0:3dac1f1bc9e0 20 pad_spi.frequency(250000);
beaglescout007 0:3dac1f1bc9e0 21 }
beaglescout007 0:3dac1f1bc9e0 22
beaglescout007 0:3dac1f1bc9e0 23 // Read PS Pad state
beaglescout007 0:3dac1f1bc9e0 24 // data1 SE -- -- ST U R D L
beaglescout007 0:3dac1f1bc9e0 25 // data2 L2 R2 L1 R1 TR O X SQ
beaglescout007 0:3dac1f1bc9e0 26 void pspad_read(unsigned short *pad1, unsigned short *pad2)
beaglescout007 0:3dac1f1bc9e0 27 {
beaglescout007 0:3dac1f1bc9e0 28 pad1_cs = 0;
beaglescout007 0:3dac1f1bc9e0 29 wait_us(500);
beaglescout007 0:3dac1f1bc9e0 30
beaglescout007 0:3dac1f1bc9e0 31 pad_spi.write(0x80);
beaglescout007 0:3dac1f1bc9e0 32 pad_spi.write(0x42);
beaglescout007 0:3dac1f1bc9e0 33 pad_spi.write(0);
beaglescout007 0:3dac1f1bc9e0 34 pad_spi.write(0);
beaglescout007 0:3dac1f1bc9e0 35 int d1 = pad_spi.write(0);
beaglescout007 0:3dac1f1bc9e0 36 int d2 = pad_spi.write(0);
beaglescout007 0:3dac1f1bc9e0 37
beaglescout007 0:3dac1f1bc9e0 38 pad1_cs = 1;
beaglescout007 0:3dac1f1bc9e0 39
beaglescout007 0:3dac1f1bc9e0 40 *pad1 = (char)~d1 << 8 | (char)~d2;
beaglescout007 0:3dac1f1bc9e0 41
beaglescout007 0:3dac1f1bc9e0 42 *pad2 = 0;
beaglescout007 0:3dac1f1bc9e0 43 }
beaglescout007 0:3dac1f1bc9e0 44