![](/media/cache/profiles/951e5e38cb91253e90bcae5ccd7baf3c.jpg.50x50_q85.jpg)
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
TFT J2 | Nucleo |
---|---|
VCC | 3V3 |
GND | GND |
CS | PB_5(D4) |
Reset | PA_10(D2) Pull Up(100k) |
D/C | PA_8(D7) |
MOSI | PA_7(D11) |
SCK | PA_5(D13) |
LED | LED-100ohm-3V3 |
MISO | PA_6(D12) |
TFT J4 | Nucleo |
---|---|
SD_CS | PA_9 |
SD_MOSI | PB_15 |
SD_MISO | PB_14 |
SD_SCK | PB_13 |
Audio | Nucleo |
---|---|
TIP | PA_4(A2) |
USB con. | Nucleo |
---|---|
GND | GND |
+ | PA_12 |
- | PA_11 |
5V | 5V |
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
- SDFileSystem by Neil Thiessen
- F401RE-USBHost by Norimasa Okamoto
- USBHostGamepad by Yuuichi Akagawa
Diff: pspad.cpp
- Revision:
- 0:3dac1f1bc9e0
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/pspad.cpp Sun Apr 03 07:45:29 2016 +0000 @@ -0,0 +1,44 @@ +/*===================================================================*/ +/* */ +/* pspad.cpp : PS Pad function */ +/* */ +/* 2016/1/20 Racoon */ +/* */ +/*===================================================================*/ + +#include "mbed.h" +#include "pspad.h" + +// SPI interface +SPI pad_spi(PC_12, PC_11, PC_10); // MOSI(should pullup), MISO, SCK +DigitalOut pad1_cs(PD_2); + +// PS pad initialize +void pspad_init() +{ + pad_spi.format(8, 3); + pad_spi.frequency(250000); +} + +// Read PS Pad state +// data1 SE -- -- ST U R D L +// data2 L2 R2 L1 R1 TR O X SQ +void pspad_read(unsigned short *pad1, unsigned short *pad2) +{ + pad1_cs = 0; + wait_us(500); + + pad_spi.write(0x80); + pad_spi.write(0x42); + pad_spi.write(0); + pad_spi.write(0); + int d1 = pad_spi.write(0); + int d2 = pad_spi.write(0); + + pad1_cs = 1; + + *pad1 = (char)~d1 << 8 | (char)~d2; + + *pad2 = 0; +} +