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/USBEndpoint.h
- Revision:
- 0:3dac1f1bc9e0
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/USBHost/USBEndpoint.h Sun Apr 03 07:45:29 2016 +0000 @@ -0,0 +1,168 @@ +/* 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. + */ + +#pragma once +#include "FunctionPointer.h" +#include "USBHostTypes.h" +#include "USBDeviceConnected.h" + +class USBDeviceConnected; + +/** +* USBEndpoint class +*/ +class USBEndpoint { +public: + /** + * Constructor + */ + USBEndpoint(USBDeviceConnected* _dev) { + init(CONTROL_ENDPOINT, IN, 8, 0); + dev = _dev; + pData = NULL; + } + + /** + * Initialize an endpoint + * + * @param type endpoint type + * @param dir endpoint direction + * @param size endpoint size + * @param ep_number endpoint number + */ + void init(ENDPOINT_TYPE _type, ENDPOINT_DIRECTION _dir, uint32_t size, uint8_t ep_number) { + setState(USB_TYPE_FREE); + setType(_type); + dir = _dir; + MaxPacketSize = size; + address = ep_number; + data01_toggle = DATA0; + } + + void ohci_init(uint8_t frameCount, uint8_t queueLimit) { + ohci.frameCount = frameCount; + ohci.queueLimit = queueLimit; + } + + /** + * Attach a member function to call when a transfer is finished + * + * @param tptr pointer to the object to call the member function on + * @param mptr pointer to the member function to be called + */ + template<typename T> + inline void attach(T* tptr, void (T::*mptr)(void)) { + if((mptr != NULL) && (tptr != NULL)) { + rx.attach(tptr, mptr); + } + } + + /** + * Attach a callback called when a transfer is finished + * + * @param fptr function pointer + */ + inline void attach(void (*fptr)(void)) { + if(fptr != NULL) { + rx.attach(fptr); + } + } + + /** + * Call the handler associted to the end of a transfer + */ + inline void call() { + rx.call(); + }; + + void setType(ENDPOINT_TYPE _type) { type = _type; } + void setState(USB_TYPE st) { state = st; } + void setDevice(USBDeviceConnected* _dev) { dev = _dev; } + void setBuffer(uint8_t* buf, int size) { buf_start = buf, buf_size = size; } + void setLengthTransferred(int len) { transferred = len; }; + void setAddress(int addr) { address = addr; } + void setSize(int size) { MaxPacketSize = size; } + void setData01(uint8_t data01) { data01_toggle = data01; } + void setNextEndpoint(USBEndpoint* ep) { nextEp = ep; }; + template<class T> + void setHALData(T data) { pData = data; } + + USBDeviceConnected* getDevice() { return dev; } + ENDPOINT_TYPE getType() { return type; }; + USB_TYPE getState() { return state; } + int getLengthTransferred() { return transferred; } + uint8_t *getBufStart() { return buf_start; } + int getBufSize() { return buf_size; } + uint8_t getAddress(){ return address; }; + int getSize() { return MaxPacketSize; } + ENDPOINT_DIRECTION getDir() { return dir; } + uint8_t getData01() { return data01_toggle; } + void toggleData01() { + data01_toggle = (data01_toggle == DATA0) ? DATA1 : DATA0; + } + USBEndpoint* nextEndpoint() { return nextEp; }; + template<class T> + T getHALData() { return reinterpret_cast<T>(pData); } + + struct { + uint8_t queueLimit; + uint8_t frameCount; // 1-8 + } ohci; +private: + USBEndpoint(){} + ENDPOINT_TYPE type; + USB_TYPE state; + ENDPOINT_DIRECTION dir; + USBDeviceConnected* dev; + uint8_t data01_toggle; // DATA0,DATA1 + uint8_t address; + int transferred; + uint8_t * buf_start; + int buf_size; + FunctionPointer rx; + int MaxPacketSize; + USBEndpoint* nextEp; + void* pData; +}; + +class EndpointQueue { +public: + EndpointQueue():head(NULL),tail(NULL) {} + void push(USBEndpoint* ep) { + if (head) { + tail->setNextEndpoint(ep); + } else { + head = ep; + } + tail = ep; + ep->setNextEndpoint(NULL); + } + USBEndpoint* pop() { + USBEndpoint* ep = head; + if (ep) { + head = ep->nextEndpoint(); + } + return ep; + } + bool empty() { return head == NULL; } + +private: + USBEndpoint* head; + USBEndpoint* tail; +}; + + +