252 lines
7.0 KiB
C
252 lines
7.0 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <irq.h>
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#include <uart.h>
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#include <hw/csr.h>
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#include <hw/flags.h>
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#include "time.h"
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#include "fb.h"
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#include "dvisamplerX.h"
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#define FRAMEBUFFER_COUNT 4
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#define FRAMEBUFFER_MASK (FRAMEBUFFER_COUNT - 1)
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static unsigned int dvisamplerX_framebuffers[FRAMEBUFFER_COUNT][1024*768] __attribute__((aligned(16)));
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static int dvisamplerX_fb_slot_indexes[2];
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static int dvisamplerX_next_fb_index;
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void dvisamplerX_isr(void)
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{
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int fb_index = -1;
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if(dvisamplerX_dma_slot0_status_read() == DVISAMPLER_SLOT_PENDING) {
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fb_index = dvisamplerX_fb_slot_indexes[0];
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dvisamplerX_fb_slot_indexes[0] = dvisamplerX_next_fb_index;
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dvisamplerX_dma_slot0_address_write((unsigned int)dvisamplerX_framebuffers[dvisamplerX_next_fb_index]);
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dvisamplerX_dma_slot0_status_write(DVISAMPLER_SLOT_LOADED);
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dvisamplerX_next_fb_index = (dvisamplerX_next_fb_index + 1) & FRAMEBUFFER_MASK;
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}
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if(dvisamplerX_dma_slot1_status_read() == DVISAMPLER_SLOT_PENDING) {
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fb_index = dvisamplerX_fb_slot_indexes[1];
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dvisamplerX_fb_slot_indexes[1] = dvisamplerX_next_fb_index;
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dvisamplerX_dma_slot1_address_write((unsigned int)dvisamplerX_framebuffers[dvisamplerX_next_fb_index]);
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dvisamplerX_dma_slot1_status_write(DVISAMPLER_SLOT_LOADED);
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dvisamplerX_next_fb_index = (dvisamplerX_next_fb_index + 1) & FRAMEBUFFER_MASK;
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}
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if(fb_index != -1)
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fb_dmaX_base_write((unsigned int)dvisamplerX_framebuffers[fb_index]);
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}
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void dvisamplerX_init_video(void)
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{
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unsigned int mask;
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dvisamplerX_dma_ev_pending_write(dvisamplerX_dma_ev_pending_read());
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dvisamplerX_dma_ev_enable_write(0x3);
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mask = irq_getmask();
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mask |= 1 << DVISAMPLERX_INTERRUPT;
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irq_setmask(mask);
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dvisamplerX_dma_frame_size_write(fb_hres*fb_vres*4);
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dvisamplerX_fb_slot_indexes[0] = 0;
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dvisamplerX_dma_slot0_address_write((unsigned int)dvisamplerX_framebuffers[0]);
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dvisamplerX_dma_slot0_status_write(DVISAMPLER_SLOT_LOADED);
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dvisamplerX_fb_slot_indexes[1] = 1;
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dvisamplerX_dma_slot1_address_write((unsigned int)dvisamplerX_framebuffers[1]);
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dvisamplerX_dma_slot1_status_write(DVISAMPLER_SLOT_LOADED);
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dvisamplerX_next_fb_index = 2;
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fb_dmaX_base_write((unsigned int)dvisamplerX_framebuffers[3]);
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}
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static int dvisamplerX_d0, dvisamplerX_d1, dvisamplerX_d2;
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void dvisamplerX_print_status(void)
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{
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dvisamplerX_data0_wer_update_write(1);
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dvisamplerX_data1_wer_update_write(1);
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dvisamplerX_data2_wer_update_write(1);
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printf("dvisamplerX: ph:%4d %4d %4d // charsync:%d%d%d [%d %d %d] // WER:%3d %3d %3d // chansync:%d // res:%dx%d\n",
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dvisamplerX_d0, dvisamplerX_d1, dvisamplerX_d2,
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dvisamplerX_data0_charsync_char_synced_read(),
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dvisamplerX_data1_charsync_char_synced_read(),
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dvisamplerX_data2_charsync_char_synced_read(),
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dvisamplerX_data0_charsync_ctl_pos_read(),
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dvisamplerX_data1_charsync_ctl_pos_read(),
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dvisamplerX_data2_charsync_ctl_pos_read(),
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dvisamplerX_data0_wer_value_read(),
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dvisamplerX_data1_wer_value_read(),
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dvisamplerX_data2_wer_value_read(),
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dvisamplerX_chansync_channels_synced_read(),
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dvisamplerX_resdetection_hres_read(),
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dvisamplerX_resdetection_vres_read());
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}
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static int wait_idelays(void)
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{
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int ev;
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ev = 0;
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elapsed(&ev, 1);
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while(dvisamplerX_data0_cap_dly_busy_read()
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|| dvisamplerX_data1_cap_dly_busy_read()
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|| dvisamplerX_data2_cap_dly_busy_read()) {
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if(elapsed(&ev, identifier_frequency_read() >> 6) == 0) {
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printf("IDELAY busy timeout\n");
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return 0;
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}
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}
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return 1;
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}
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int dvisamplerX_calibrate_delays(void)
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{
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dvisamplerX_data0_cap_dly_ctl_write(DVISAMPLER_DELAY_CAL);
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dvisamplerX_data1_cap_dly_ctl_write(DVISAMPLER_DELAY_CAL);
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dvisamplerX_data2_cap_dly_ctl_write(DVISAMPLER_DELAY_CAL);
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if(!wait_idelays())
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return 0;
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dvisamplerX_data0_cap_dly_ctl_write(DVISAMPLER_DELAY_RST);
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dvisamplerX_data1_cap_dly_ctl_write(DVISAMPLER_DELAY_RST);
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dvisamplerX_data2_cap_dly_ctl_write(DVISAMPLER_DELAY_RST);
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dvisamplerX_data0_cap_phase_reset_write(1);
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dvisamplerX_data1_cap_phase_reset_write(1);
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dvisamplerX_data2_cap_phase_reset_write(1);
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dvisamplerX_d0 = dvisamplerX_d1 = dvisamplerX_d2 = 0;
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return 1;
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}
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int dvisamplerX_adjust_phase(void)
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{
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switch(dvisamplerX_data0_cap_phase_read()) {
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case DVISAMPLER_TOO_LATE:
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dvisamplerX_data0_cap_dly_ctl_write(DVISAMPLER_DELAY_DEC);
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if(!wait_idelays())
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return 0;
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dvisamplerX_d0--;
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dvisamplerX_data0_cap_phase_reset_write(1);
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break;
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case DVISAMPLER_TOO_EARLY:
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dvisamplerX_data0_cap_dly_ctl_write(DVISAMPLER_DELAY_INC);
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if(!wait_idelays())
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return 0;
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dvisamplerX_d0++;
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dvisamplerX_data0_cap_phase_reset_write(1);
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break;
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}
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switch(dvisamplerX_data1_cap_phase_read()) {
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case DVISAMPLER_TOO_LATE:
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dvisamplerX_data1_cap_dly_ctl_write(DVISAMPLER_DELAY_DEC);
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if(!wait_idelays())
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return 0;
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dvisamplerX_d1--;
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dvisamplerX_data1_cap_phase_reset_write(1);
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break;
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case DVISAMPLER_TOO_EARLY:
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dvisamplerX_data1_cap_dly_ctl_write(DVISAMPLER_DELAY_INC);
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if(!wait_idelays())
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return 0;
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dvisamplerX_d1++;
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dvisamplerX_data1_cap_phase_reset_write(1);
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break;
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}
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switch(dvisamplerX_data2_cap_phase_read()) {
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case DVISAMPLER_TOO_LATE:
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dvisamplerX_data2_cap_dly_ctl_write(DVISAMPLER_DELAY_DEC);
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if(!wait_idelays())
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return 0;
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dvisamplerX_d2--;
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dvisamplerX_data2_cap_phase_reset_write(1);
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break;
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case DVISAMPLER_TOO_EARLY:
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dvisamplerX_data2_cap_dly_ctl_write(DVISAMPLER_DELAY_INC);
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if(!wait_idelays())
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return 0;
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dvisamplerX_d2++;
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dvisamplerX_data2_cap_phase_reset_write(1);
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break;
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}
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return 1;
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}
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int dvisamplerX_init_phase(void)
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{
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int o_d0, o_d1, o_d2;
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int i, j;
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for(i=0;i<100;i++) {
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o_d0 = dvisamplerX_d0;
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o_d1 = dvisamplerX_d1;
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o_d2 = dvisamplerX_d2;
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for(j=0;j<1000;j++) {
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if(!dvisamplerX_adjust_phase())
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return 0;
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}
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if((abs(dvisamplerX_d0 - o_d0) < 4) && (abs(dvisamplerX_d1 - o_d1) < 4) && (abs(dvisamplerX_d2 - o_d2) < 4))
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return 1;
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}
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return 0;
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}
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int dvisamplerX_phase_startup(void)
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{
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int ret;
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int attempts;
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attempts = 0;
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while(1) {
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attempts++;
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dvisamplerX_calibrate_delays();
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printf("dvisamplerX: delays calibrated\n");
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ret = dvisamplerX_init_phase();
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if(ret) {
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printf("dvisamplerX: phase init OK\n");
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return 1;
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} else {
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printf("dvisamplerX: phase init failed\n");
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if(attempts > 3) {
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printf("dvisamplerX: giving up\n");
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dvisamplerX_calibrate_delays();
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return 0;
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}
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}
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}
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}
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static void dvisamplerX_check_overflow(void)
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{
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if(dvisamplerX_frame_overflow_read()) {
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printf("dvisamplerX: FIFO overflow\n");
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dvisamplerX_frame_overflow_write(1);
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}
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}
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static int dvisamplerX_locked;
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static int dvisamplerX_last_event;
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void dvisamplerX_service(void)
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{
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if(dvisamplerX_locked) {
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if(dvisamplerX_clocking_locked_read()) {
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if(elapsed(&dvisamplerX_last_event, identifier_frequency_read()/2)) {
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dvisamplerX_adjust_phase();
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dvisamplerX_print_status();
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}
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} else {
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printf("dvisamplerX: lost PLL lock\n");
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dvisamplerX_locked = 0;
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}
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} else {
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if(dvisamplerX_clocking_locked_read()) {
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printf("dvisamplerX: PLL locked\n");
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dvisamplerX_phase_startup();
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dvisamplerX_print_status();
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dvisamplerX_locked = 1;
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}
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}
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dvisamplerX_check_overflow();
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}
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