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/USBHostHub.cpp
- Revision:
- 0:3dac1f1bc9e0
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/USBHost/USBHostHub.cpp Sun Apr 03 07:45:29 2016 +0000 @@ -0,0 +1,113 @@ +#include "USBHost.h" + +#define PORT_CONNECTION 0 +#define PORT_ENABLE 1 +#define PORT_SUSPEND 2 +#define PORT_OVER_CURRENT 3 +#define PORT_RESET 4 +#define PORT_POWER 8 +#define PORT_LOW_SPEED 9 + +#define C_PORT_CONNECTION 16 +#define C_PORT_ENABLE 17 +#define C_PORT_SUSPEND 18 +#define C_PORT_OVER_CURRENT 19 +#define C_PORT_RESET 20 + +bool USBHost::Hub(USBDeviceConnected* dev) { + USB_INFO("New HUB: VID:%04x PID:%04x [dev: %p]", dev->getVid(), dev->getPid(), dev); + HubDescriptor hubdesc; + // get HUB descriptor + int rc = controlRead(dev, + USB_DEVICE_TO_HOST | USB_REQUEST_TYPE_CLASS, + GET_DESCRIPTOR, + 0x29 << 8, 0, reinterpret_cast<uint8_t*>(&hubdesc), + sizeof(HubDescriptor)); + USB_TEST_ASSERT(rc == USB_TYPE_OK); + if (rc != USB_TYPE_OK) { + return false; + } + USB_DBG_HEX((uint8_t*)&hubdesc, sizeof(hubdesc)); + + uint32_t status; + rc = controlRead( dev, + 0xa0, 0, 0, 0, reinterpret_cast<uint8_t*>(&status), 4); + USB_TEST_ASSERT(rc == USB_TYPE_OK); + if (rc != USB_TYPE_OK) { + return false; + } + USB_DBG("HUB STATUS: %08X\n", status); + + for(int i = 1; i <= hubdesc.bNbrPorts; i++) { + SetPortPower(dev, i); // power on + wait_ms(hubdesc.bPwrOn2PwrGood*2); + uint32_t status; + GetPortStatus(dev, i, &status); + USB_DBG("port: %d status: %08X\n", i, status); + if (status & 0x010000) { // Connect Status Change, has changed + USB_TEST_ASSERT(status & 0x000001); + ClearPortFeature(dev, C_PORT_CONNECTION, i); + int lowSpeed = 0; + if (status & 0x0200) { + lowSpeed = 1; + } + PortReset(dev, i); + if (!addDevice(dev, i, lowSpeed)) { + ClearPortPower(dev, i); // power off + } + } else { + ClearPortPower(dev, i); // power off + } + } + return false; +} + + +int USBHost::SetPortPower(USBDeviceConnected* dev, int port) +{ + return SetPortFeature(dev, PORT_POWER, port); +} + +int USBHost::ClearPortPower(USBDeviceConnected* dev, int port) +{ + return ClearPortFeature(dev, PORT_POWER, port); +} + +int USBHost::SetPortFeature(USBDeviceConnected* dev, int feature, int index) +{ + return controlWrite(dev, 0x23, SET_FEATURE,feature,index,0,0); +} + +int USBHost::ClearPortFeature(USBDeviceConnected* dev, int feature, int index) +{ + return controlWrite(dev, 0x23, CLEAR_FEATURE,feature,index,0,0); +} + +int USBHost::SetPortReset(USBDeviceConnected* dev, int port) +{ + return SetPortFeature(dev, PORT_RESET, port); +} + +int USBHost::GetPortStatus(USBDeviceConnected* dev, int port, uint32_t* status) +{ + return controlRead(dev, 0xa3, GET_STATUS, 0, port, (uint8_t*)status, 4); +} + +int USBHost::PortReset(USBDeviceConnected* dev, int port) +{ + USB_DBG("%p port=%d\n", this, port); + USB_TEST_ASSERT(port >= 1); + SetPortReset(dev, port); + // wait reset + for(int i = 0; i < 100; i++) { + uint32_t status; + GetPortStatus(dev, port, &status); + USB_DBG("RESET port: %d status: %08X\n", port, status); + if (status & 0x100000) { // Reset change , Reset complete + return USB_TYPE_OK; + } + wait_ms(5); + } + return USB_TYPE_ERROR; +} +