6502
/
pill_6502
mirror of https://github.com/satoshinm/pill_6502.git
1
0
Fork 0
Code Issues Projects Releases Wiki Activity

Step the 6502 on each systick, and add 't' command to show ticks/instructions executed

This commit is contained in:
Satoshi N. M 2018-01-12 23:15:56 -08:00
parent 71c0b67f53
commit ca77b072ab
2 changed files with 11 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
src/cdcacm.c
View File

@ -225,6 +225,8 @@ static void usbuart_usb_out_cb(usbd_device *dev, uint8_t ep)
}
// prompt
reply_buf[j++] = '\r';
reply_buf[j++] = '\n';
reply_buf[j++] = '>';
reply_buf[j++] = ' ';
}

9
src/main.c
View File

@ -19,6 +19,7 @@
*/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <libopencm3/cm3/nvic.h>
#include <libopencm3/cm3/systick.h>
@ -28,6 +29,7 @@
#include <libopencm3/usb/hid.h>
#include <libopencm3/usb/cdc.h>
#include "fake6502.h"
#include "cdcacm.h"
#include "version.h"
@ -82,6 +84,7 @@ static const char *usb_strings[] = {
void sys_tick_handler(void)
{
step6502();
gpio_toggle(GPIOC, GPIO13);
}
@ -96,6 +99,10 @@ char *process_serial_command(char *buf, int len) {
if (buf[0] == 'v') {
return "Pill 6502 version " FIRMWARE_VERSION;
} else if (buf[0] == 't') {
static char buf[64];
snprintf(buf, sizeof(buf), "%ld ticks\r\n%ld instructions", clockticks6502, instructions);
return buf;
} else {
return "invalid command, try ? for help";
}
@ -156,6 +163,8 @@ int main(void)
usbd_control_buffer, sizeof(usbd_control_buffer));
usbd_register_set_config_callback(usbd_dev, usb_set_config);
reset6502();
while (1)
usbd_poll(usbd_dev);
}