194 lines
5.6 KiB
C
194 lines
5.6 KiB
C
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
|
|
#include <irq.h>
|
|
#include <uart.h>
|
|
#include <console.h>
|
|
#include <hw/csr.h>
|
|
#include <hw/flags.h>
|
|
|
|
static int dvisampler0_d0, dvisampler0_d1, dvisampler0_d2;
|
|
|
|
static void print_status(void)
|
|
{
|
|
printf("dvisampler0 ph: %4d %4d %4d // %d%d%d [%d %d %d] // %d // %dx%d\n", dvisampler0_d0, dvisampler0_d1, dvisampler0_d2,
|
|
dvisampler0_data0_charsync_char_synced_read(),
|
|
dvisampler0_data1_charsync_char_synced_read(),
|
|
dvisampler0_data2_charsync_char_synced_read(),
|
|
dvisampler0_data0_charsync_ctl_pos_read(),
|
|
dvisampler0_data1_charsync_ctl_pos_read(),
|
|
dvisampler0_data2_charsync_ctl_pos_read(),
|
|
dvisampler0_chansync_channels_synced_read(),
|
|
dvisampler0_resdetection_hres_read(),
|
|
dvisampler0_resdetection_vres_read());
|
|
}
|
|
|
|
static void calibrate_delays(void)
|
|
{
|
|
dvisampler0_data0_cap_dly_ctl_write(DVISAMPLER_DELAY_CAL);
|
|
dvisampler0_data1_cap_dly_ctl_write(DVISAMPLER_DELAY_CAL);
|
|
dvisampler0_data2_cap_dly_ctl_write(DVISAMPLER_DELAY_CAL);
|
|
while(dvisampler0_data0_cap_dly_busy_read()
|
|
|| dvisampler0_data1_cap_dly_busy_read()
|
|
|| dvisampler0_data2_cap_dly_busy_read());
|
|
dvisampler0_data0_cap_dly_ctl_write(DVISAMPLER_DELAY_RST);
|
|
dvisampler0_data1_cap_dly_ctl_write(DVISAMPLER_DELAY_RST);
|
|
dvisampler0_data2_cap_dly_ctl_write(DVISAMPLER_DELAY_RST);
|
|
dvisampler0_data0_cap_phase_reset_write(1);
|
|
dvisampler0_data1_cap_phase_reset_write(1);
|
|
dvisampler0_data2_cap_phase_reset_write(1);
|
|
dvisampler0_d0 = dvisampler0_d1 = dvisampler0_d2 = 0;
|
|
printf("Delays calibrated\n");
|
|
}
|
|
|
|
static void adjust_phase(void)
|
|
{
|
|
switch(dvisampler0_data0_cap_phase_read()) {
|
|
case DVISAMPLER_TOO_LATE:
|
|
dvisampler0_data0_cap_dly_ctl_write(DVISAMPLER_DELAY_DEC);
|
|
dvisampler0_d0--;
|
|
dvisampler0_data0_cap_phase_reset_write(1);
|
|
break;
|
|
case DVISAMPLER_TOO_EARLY:
|
|
dvisampler0_data0_cap_dly_ctl_write(DVISAMPLER_DELAY_INC);
|
|
dvisampler0_d0++;
|
|
dvisampler0_data0_cap_phase_reset_write(1);
|
|
break;
|
|
}
|
|
switch(dvisampler0_data1_cap_phase_read()) {
|
|
case DVISAMPLER_TOO_LATE:
|
|
dvisampler0_data1_cap_dly_ctl_write(DVISAMPLER_DELAY_DEC);
|
|
dvisampler0_d1--;
|
|
dvisampler0_data1_cap_phase_reset_write(1);
|
|
break;
|
|
case DVISAMPLER_TOO_EARLY:
|
|
dvisampler0_data1_cap_dly_ctl_write(DVISAMPLER_DELAY_INC);
|
|
dvisampler0_d1++;
|
|
dvisampler0_data1_cap_phase_reset_write(1);
|
|
break;
|
|
}
|
|
switch(dvisampler0_data2_cap_phase_read()) {
|
|
case DVISAMPLER_TOO_LATE:
|
|
dvisampler0_data2_cap_dly_ctl_write(DVISAMPLER_DELAY_DEC);
|
|
dvisampler0_d2--;
|
|
dvisampler0_data2_cap_phase_reset_write(1);
|
|
break;
|
|
case DVISAMPLER_TOO_EARLY:
|
|
dvisampler0_data2_cap_dly_ctl_write(DVISAMPLER_DELAY_INC);
|
|
dvisampler0_d2++;
|
|
dvisampler0_data2_cap_phase_reset_write(1);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static int init_phase(void)
|
|
{
|
|
int o_d0, o_d1, o_d2;
|
|
int i, j;
|
|
|
|
for(i=0;i<100;i++) {
|
|
o_d0 = dvisampler0_d0;
|
|
o_d1 = dvisampler0_d1;
|
|
o_d2 = dvisampler0_d2;
|
|
for(j=0;j<1000;j++)
|
|
adjust_phase();
|
|
if((abs(dvisampler0_d0 - o_d0) < 4) && (abs(dvisampler0_d1 - o_d1) < 4) && (abs(dvisampler0_d2 - o_d2) < 4))
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
#define FRAMEBUFFER_COUNT 4
|
|
#define FRAMEBUFFER_MASK (FRAMEBUFFER_COUNT - 1)
|
|
|
|
static unsigned int dvisampler0_framebuffers[FRAMEBUFFER_COUNT][640*480] __attribute__((aligned(16)));
|
|
static int dvisampler0_fb_slot_indexes[2];
|
|
static int dvisampler0_next_fb_index;
|
|
|
|
static void dvisampler0_init_video(void)
|
|
{
|
|
unsigned int mask;
|
|
|
|
dvisampler0_dma_ev_pending_write(dvisampler0_dma_ev_pending_read());
|
|
dvisampler0_dma_ev_enable_write(0x3);
|
|
mask = irq_getmask();
|
|
mask |= 1 << DVISAMPLER0_INTERRUPT;
|
|
irq_setmask(mask);
|
|
|
|
dvisampler0_dma_frame_size_write(sizeof(dvisampler0_framebuffers[0]));
|
|
dvisampler0_fb_slot_indexes[0] = 0;
|
|
dvisampler0_dma_slot0_address_write((unsigned int)dvisampler0_framebuffers[0]);
|
|
dvisampler0_dma_slot0_status_write(DVISAMPLER_SLOT_LOADED);
|
|
dvisampler0_fb_slot_indexes[1] = 1;
|
|
dvisampler0_dma_slot1_address_write((unsigned int)dvisampler0_framebuffers[1]);
|
|
dvisampler0_dma_slot1_status_write(DVISAMPLER_SLOT_LOADED);
|
|
dvisampler0_next_fb_index = 2;
|
|
|
|
fb_base_write((unsigned int)dvisampler0_framebuffers[0]);
|
|
}
|
|
|
|
void dvisampler0_isr(void)
|
|
{
|
|
int fb_index = -1;
|
|
|
|
if(dvisampler0_dma_slot0_status_read() == DVISAMPLER_SLOT_PENDING) {
|
|
fb_index = dvisampler0_fb_slot_indexes[0];
|
|
dvisampler0_fb_slot_indexes[0] = dvisampler0_next_fb_index;
|
|
dvisampler0_dma_slot0_address_write((unsigned int)dvisampler0_framebuffers[dvisampler0_next_fb_index]);
|
|
dvisampler0_dma_slot0_status_write(DVISAMPLER_SLOT_LOADED);
|
|
dvisampler0_next_fb_index = (dvisampler0_next_fb_index + 1) & FRAMEBUFFER_MASK;
|
|
}
|
|
if(dvisampler0_dma_slot1_status_read() == DVISAMPLER_SLOT_PENDING) {
|
|
fb_index = dvisampler0_fb_slot_indexes[1];
|
|
dvisampler0_fb_slot_indexes[1] = dvisampler0_next_fb_index;
|
|
dvisampler0_dma_slot1_address_write((unsigned int)dvisampler0_framebuffers[dvisampler0_next_fb_index]);
|
|
dvisampler0_dma_slot1_status_write(DVISAMPLER_SLOT_LOADED);
|
|
dvisampler0_next_fb_index = (dvisampler0_next_fb_index + 1) & FRAMEBUFFER_MASK;
|
|
}
|
|
|
|
if(fb_index != -1)
|
|
fb_base_write((unsigned int)dvisampler0_framebuffers[fb_index]);
|
|
}
|
|
|
|
static void vmix(void)
|
|
{
|
|
unsigned int counter;
|
|
|
|
while(1) {
|
|
while(!dvisampler0_clocking_locked_read());
|
|
printf("PLL locked\n");
|
|
calibrate_delays();
|
|
if(init_phase())
|
|
printf("Phase init OK\n");
|
|
else
|
|
printf("Phase did not settle\n");
|
|
print_status();
|
|
|
|
counter = 0;
|
|
while(dvisampler0_clocking_locked_read()) {
|
|
counter++;
|
|
if(counter == 2000000) {
|
|
print_status();
|
|
adjust_phase();
|
|
counter = 0;
|
|
}
|
|
}
|
|
printf("PLL unlocked\n");
|
|
}
|
|
}
|
|
|
|
int main(void)
|
|
{
|
|
irq_setmask(0);
|
|
irq_setie(1);
|
|
uart_init();
|
|
|
|
puts("Minimal video mixer software built "__DATE__" "__TIME__"\n");
|
|
|
|
dvisampler0_init_video();
|
|
fb_enable_write(1);
|
|
vmix();
|
|
|
|
return 0;
|
|
}
|