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: USBHost/mymap.h
- Revision:
- 0:3dac1f1bc9e0
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/USBHost/mymap.h Sun Apr 03 07:45:29 2016 +0000 @@ -0,0 +1,66 @@ +#pragma once + +template<class K,class T> +class mymap { + struct mypair { + K first; + T second; + }; +public: + mymap() { + m_size = 0; + } + T& operator[](const K& key) { + int it; + if (count(key) == 0) { + it = insert(key, 0); + } else { + it = find(key); + } + return m_buf[it].second; + } + bool empty() { return m_size == 0 ? true : false; } + int size() { return m_size; } + void clear() { m_size = 0; } + int count(K key) { + for(int i = 0; i < m_size; i++) { + if (m_buf[i].first == key) { + return 1; + } + } + return 0; + } + +private: + int find(K key) { + for(int i = 0; i < m_size; i++) { + if (m_buf[i].first == key) { + return i; + } + } + return -1; + } + int insert(K key, T value) { + int it = find(key); + if (it != -1) { + m_buf[it].second = value; + return it; + } + mypair* new_buf = new mypair[m_size+1]; + if (m_size > 0) { + for(int i = 0; i < m_size; i++) { + new_buf[i] = m_buf[i]; + } + delete[] m_buf; + } + m_buf = new_buf; + it = m_size++; + m_buf[it].first = key; + m_buf[it].second = value; + return it; + } + + int m_size; + mypair *m_buf; +}; +