bsnes/nall/emulation/super-famicom-usart.hpp

104 lines
2.3 KiB
C++

#ifndef NALL_EMULATION_SUPER_FAMICOM_USART_HPP
#define NALL_EMULATION_SUPER_FAMICOM_USART_HPP
#include <nall/platform.hpp>
#include <nall/function.hpp>
#include <nall/serial.hpp>
#include <nall/stdint.hpp>
#include <signal.h>
#include <sys/time.h>
#include <sys/resource.h>
#define usartproc dllexport
static nall::function<bool ()> usart_quit;
static nall::function<void (unsigned milliseconds)> usart_usleep;
static nall::function<bool ()> usart_readable;
static nall::function<uint8_t ()> usart_read;
static nall::function<bool ()> usart_writable;
static nall::function<void (uint8_t data)> usart_write;
extern "C" usartproc void usart_init(
nall::function<bool ()> quit,
nall::function<void (unsigned milliseconds)> usleep,
nall::function<bool ()> readable,
nall::function<uint8_t ()> read,
nall::function<bool ()> writable,
nall::function<void (uint8_t data)> write
) {
usart_quit = quit;
usart_usleep = usleep;
usart_readable = readable;
usart_read = read;
usart_writable = writable;
usart_write = write;
}
extern "C" usartproc void usart_main(int, char**);
//
static nall::serial usart;
static bool usart_is_virtual = true;
static bool usart_sigint = false;
static bool usart_virtual() {
return usart_is_virtual;
}
//
static bool usarthw_quit() {
return usart_sigint;
}
static void usarthw_usleep(unsigned milliseconds) {
usleep(milliseconds);
}
static bool usarthw_readable() {
return usart.readable();
}
static uint8_t usarthw_read() {
while(true) {
uint8_t buffer[1];
signed length = usart.read((uint8_t*)&buffer, 1);
if(length > 0) return buffer[0];
}
}
static bool usarthw_writable() {
return usart.writable();
}
static void usarthw_write(uint8_t data) {
uint8_t buffer[1] = { data };
usart.write((uint8_t*)&buffer, 1);
}
static void sigint(int) {
signal(SIGINT, SIG_DFL);
usart_sigint = true;
}
int main(int argc, char** argv) {
setpriority(PRIO_PROCESS, 0, -20); //requires superuser privileges; otherwise priority = +0
signal(SIGINT, sigint);
if(usart.open("/dev/ttyACM0", 57600, true) == false) {
printf("error: unable to open USART hardware device\n");
return 0;
}
usart_is_virtual = false;
usart_init(usarthw_quit, usarthw_usleep, usarthw_readable, usarthw_read, usarthw_writable, usarthw_write);
usart_main(argc, argv);
usart.close();
return 0;
}
#endif