github.com/mist-devel.mist-firmware
1
0
Fork 0
mirror of https://github.com/mist-devel/mist-firmware.git synced 2026-01-13 15:17:43 +00:00
Code Releases Activity

PS2 mouse rate limitation

Browse Source
This commit is contained in:
harbaum 2014-10-10 07:34:11 +00:00
parent 9c9bc4099a
commit b1723555d6
1 changed files with 80 additions and 20 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

100
user_io.c
View File

@ -17,21 +17,33 @@
extern fileTYPE file;
extern char s[40];
// mouse and keyboard emulation state
typedef enum { EMU_NONE, EMU_MOUSE, EMU_JOY0, EMU_JOY1 } emu_mode_t;
static emu_mode_t emu_mode = EMU_NONE;
static unsigned char emu_state = 0;
static long emu_timer;
static unsigned long emu_timer = 0;
#define EMU_MOUSE_FREQ 5
// keep state over core type and its capabilities
static unsigned char core_type = CORE_TYPE_UNKNOWN;
static char core_type_8bit_with_config_string = 0;
static unsigned char adc_state = 0;
// permanent state of adc inputs used for dip switches
static unsigned char adc_state = 0;
AT91PS_ADC a_pADC = AT91C_BASE_ADC;
AT91PS_PMC a_pPMC = AT91C_BASE_PMC;
// keep state of caps lock
static char caps_lock_toggle = 0;
// mouse position storage for ps2 rate limitation
#define X 0
#define Y 1
#define PS2_MOUSE_FREQ 20 // 20 ms -> 50hz
static int16_t ps2_mouse_pos[2] = { 0, 0};
static uint8_t ps2_mouse_flags = 0;
static unsigned long ps2_mouse_timer;
static void PollOneAdc() {
static unsigned char adc_cnt = 0xff;
@ -825,6 +837,69 @@ void user_io_poll() {
}
}
// frequently check ps2 mouse for events
if(CheckTimer(ps2_mouse_timer)) {
ps2_mouse_timer = GetTimer(PS2_MOUSE_FREQ);
// has ps2 mouse data been updated in the meantime
if(ps2_mouse_flags & 0x08) {
unsigned char ps2_mouse[3];
// PS2 format:
// YOvfl, XOvfl, dy8, dx8, 1, mbtn, rbtn, lbtn
// dx[7:0]
// dy[7:0]
ps2_mouse[0] = ps2_mouse_flags;
// ------ X axis -----------
// store sign bit in first byte
ps2_mouse[0] |= (ps2_mouse_pos[X] < 0)?0x10:0x00;
if(ps2_mouse_pos[X] < -255) {
// min possible value + overflow flag
ps2_mouse[0] |= 0x40;
ps2_mouse[1] = -128;
} else if(ps2_mouse_pos[X] > 255) {
// max possible value + overflow flag
ps2_mouse[0] |= 0x40;
ps2_mouse[1] = 255;
} else
ps2_mouse[1] = ps2_mouse_pos[X];
// ------ Y axis -----------
// store sign bit in first byte
ps2_mouse[0] |= (ps2_mouse_pos[Y] < 0)?0x20:0x00;
if(ps2_mouse_pos[Y] < -255) {
// min possible value + overflow flag
ps2_mouse[0] |= 0x80;
ps2_mouse[2] = -128;
} else if(ps2_mouse_pos[Y] > 255) {
// max possible value + overflow flag
ps2_mouse[0] |= 0x80;
ps2_mouse[2] = 255;
} else
ps2_mouse[2] = ps2_mouse_pos[Y];
// collect movement info and send at predefined rate
EnableIO();
SPI(UIO_MOUSE);
iprintf("PS2 MOUSE: %x %d %d\n",
ps2_mouse[0], ps2_mouse[1], ps2_mouse[2]);
SPI(ps2_mouse[0]);
SPI(ps2_mouse[1]);
SPI(ps2_mouse[2]);
DisableIO();
// reset counters
ps2_mouse_flags = 0;
ps2_mouse_pos[X] = ps2_mouse_pos[Y] = 0;
}
}
// --------------- THE FOLLOWING IS DEPRECATED AND WILL BE REMOVED ------------
// ------------------------ USE SD CARD EMULATION INSTEAD ---------------------
// raw sector io for the atari800 core which include a full
// file system driver usually implemented using a second cpu
static unsigned long bit8_status = 0;
@ -971,24 +1046,9 @@ void user_io_mouse(unsigned char b, char x, char y) {
// 8 bit core expects ps2 like data
if(core_type == CORE_TYPE_8BIT) {
// collect movement info and send at predefined rate
EnableIO();
SPI(UIO_MOUSE);
// PS2 format:
// XOvfl, YOvfl, dy8, dx8, 1, mbtn, rbtn, lbtn
// dx[7:0]
// dy[7:0]
iprintf("PS2 MOUSE: %x %d %d\n",
((y>0)?0x20:0) | ((x<0)?0x10:0) | 0x08 | (b&3), x, -y);
SPI(((y>0)?0x20:0) | ((x<0)?0x10:0) | 0x08 | (b&3));
SPI(x);
SPI(-y);
DisableIO();
ps2_mouse_pos[X] += x;
ps2_mouse_pos[Y] -= y; // ps2 y axis is reversed over usb
ps2_mouse_flags = 0x08 | (b&3);
}
// send mouse data as mist expects it