![](/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: USBHost/USBHostGamepad.cpp
- Revision:
- 0:3dac1f1bc9e0
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/USBHost/USBHostGamepad.cpp Sun Apr 03 07:45:29 2016 +0000 @@ -0,0 +1,119 @@ +/* + * mbed USBHost Gamepad driver sample + * Copyright (c) 2014 Yuuichi Akagawa + * + * modified from mbed USBHostMouse + * + * 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. + */ + +#include "USBHostGamepad.h" +//#if USBHOST_GAMEPAD + +USBHostGamepad::USBHostGamepad() { + host = USBHost::getHostInst(); + init(); +} + +void USBHostGamepad::init() { + dev = NULL; + int_in = NULL; + dev_connected = false; + gamepad_device_found = false; + gamepad_intf = -1; +} + +bool USBHostGamepad::connected() { + return dev_connected; +} + +bool USBHostGamepad::connect() { + if (dev_connected) { + return true; + } + + for (uint8_t i = 0; i < MAX_DEVICE_CONNECTED; i++) { + if ((dev = host->getDevice(i)) != NULL) { + + if(host->enumerate(dev, this)) + break; + + if (gamepad_device_found) { + + int_in = dev->getEndpoint(gamepad_intf, INTERRUPT_ENDPOINT, IN); + if (!int_in) + break; + + USB_INFO("New Gamepad/Joystick device: VID:%04x PID:%04x [dev: %p - intf: %d]", dev->getVid(), dev->getPid(), dev, gamepad_intf); +#if DEBUG > 3 + //Parse HID Report Descriptor + parseHidDescr(); +#endif + dev->setName("Gamepad", gamepad_intf); + host->registerDriver(dev, gamepad_intf, this, &USBHostGamepad::init); + + int_in->attach(this, &USBHostGamepad::rxHandler); + rxSize = int_in->getSize(); + if (rxSize > sizeof(report)) + rxSize = sizeof(report); + host->interruptRead(dev, int_in, report, rxSize, false); + + dev_connected = true; + return true; + } + } + } + init(); + return false; +} + +void USBHostGamepad::rxHandler() { + if (dev) + host->interruptRead(dev, int_in, report, rxSize, false); + + /* modified 2016 Racoon */ + +} + +/*virtual*/ void USBHostGamepad::setVidPid(uint16_t vid, uint16_t pid) +{ + // we don't check VID/PID for gamepad driver +} + +/*virtual*/ bool USBHostGamepad::parseInterface(uint8_t intf_nb, uint8_t intf_class, uint8_t intf_subclass, uint8_t intf_protocol) //Must return true if the interface should be parsed +{ + if ((gamepad_intf == -1) && + (intf_class == HID_CLASS) && + (intf_subclass == 0x00) && + (intf_protocol == 0x00)) { + gamepad_intf = intf_nb; + return true; + } + return false; +} + +/*virtual*/ bool USBHostGamepad::useEndpoint(uint8_t intf_nb, ENDPOINT_TYPE type, ENDPOINT_DIRECTION dir) //Must return true if the endpoint will be used +{ + if (intf_nb == gamepad_intf) { + if (type == INTERRUPT_ENDPOINT && dir == IN) { + gamepad_device_found = true; + return true; + } + } + return false; +} + +