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fancy new display driver

This commit is contained in:
Hans-Gert Dahmen 2012-05-21 23:06:33 +00:00
parent 2408387fba
commit d6e0f74e24
3 changed files with 144 additions and 88 deletions
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4
borg_hw/borg_hw.h
View File

@ -5,7 +5,11 @@
#define LINEBYTES (((NUM_COLS-1)/8)+1)
#ifndef BORG_FRAMEBUF
extern unsigned char pixmap[NUMPLANE][NUM_ROWS][LINEBYTES];
#else /* BORG_FRAMEBUF */
unsigned char framebuf[NUM_ROWS][NUM_COLS];
#endif /* BORG_FRAMEBUF */
void watchdog_enable();
void borg_hw_init();

217
borg_hw/borg_hw_borg16_hgmod.c
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@ -4,6 +4,7 @@
#include <avr/interrupt.h>
#include <avr/io.h>
#include <avr/wdt.h>
#include <util/delay.h>
#include "borg_hw.h"
/*
@ -38,16 +39,18 @@
#define TIMER0_COMP_vect TIMER0_COMPA_vect
#endif
// buffer which holds the currently shown frame
unsigned char pixmap[NUMPLANE][NUM_ROWS][LINEBYTES];
//lookup table
uint16_t colormap[256] = {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,29,31,34,36,39,42,45,48,51,55,58,62,65,69,73,77,81,85,90,94,99,103,108,113,118,123,129,134,140,145,151,157,163,169,176,182,188,195,202,209,216,223,230,238,245,253,261,269,277,285,293,302,310,319,328,337,346,355,365,374,384,394,404,414,424,434,445,455,466,477,488,499,510,522,533,545,557,569,581,593,606,618,631,644,657,670,683,696,710,723,737,751,765,779,794,808,823,838,853,868,883,898,914,930,945,961,978,994,1010,1027,1043,1060,1077,1094,1112,1129,1147,1164,1182,1200,1218,1237,1255,1274,1293,1311,1331,1350,1369,1389,1408,1428,1448,1468,1488,1509,1529,1550,1571,1592,1613,1635,1656,1678,1700,1721,1744,1766,1788,1811,1834,1856,1879,1903,1926,1949,1973,1997,2021,2045,2069,2094,2118,2143,2168,2193,2218,2244,2269,2295,2321,2347,2373,2399,2426,2452,2479,2506,2533,2560,2588,2615,2643,2671,2699,2727,2756,2784,2813,2842,2871,2900,2929,2959,2989,3018,3048,3079,3109,3139,3170,3201,3232,3263,3294,3326,3357,3389,3421,3453,3485,3518,3550,3583,3616,3649,3682,3716,3749,3783,3817,3851,3886,3920,3955,3989,4024,4059,4094};
// switch to next row
static void nextrow(uint8_t row) {
unsigned char i;
// buffer which holds the currently shown frame
unsigned char framebuf[NUM_ROWS][NUM_COLS];
//row counter
static unsigned char row = 0;
//increment & wrap row counter
if (++row == NUM_ROWS) row = 0;
//switch to next row
static void nextrow() {
unsigned char i;
// short delay loop, to ensure proper deactivation of the drivers
for (i = 0; i < 10; i++) asm volatile("nop");
@ -75,92 +78,114 @@ static void nextrow(uint8_t row) {
ROWPORT |= (1 << PIN_CLK);
ROWPORT &= ~(1 << PIN_CLK);
}
// another delay loop, to ensure that the drivers are ready
for (i = 0; i < 20; i++) asm volatile("nop");
}
// show a row
/*
static void rowshow(unsigned char row, unsigned char plane) {
// depending on the currently drawn plane, display the row for a specific
// amount of time
static unsigned char const ocr_table[] = {3, 4, 22};
OCR0 = ocr_table[plane];
// output data of the current row to the column drivers
uint8_t tmp, tmp1;
row = (row>>1) + ((row & 0x01)?8:0 );
tmp = pixmap[plane][row][0];
tmp1 = pixmap[plane][row][1];
#ifdef REVERSE_COLS
tmp = (tmp >> 4) | (tmp << 4);
tmp = ((tmp & 0xcc) >> 2) | ((tmp & 0x33)<< 2); //0xcc = 11001100, 0x33 = 00110011
tmp = ((tmp & 0xaa) >> 1) | ((tmp & 0x55)<< 1); //0xaa = 10101010, 0x55 = 1010101
TLCPORT2 = tmp;
tmp = tmp1;
tmp = (tmp >> 4) | (tmp << 4);
tmp = ((tmp & 0xcc) >> 2) | ((tmp & 0x33) << 2); //0xcc = 11001100, 0x33 = 00110011
tmp = ((tmp & 0xaa) >> 1) | ((tmp & 0x55) << 1); //0xaa = 10101010, 0x55 = 1010101
TLCPORT1 = tmp;
#else
TLCPORT1 = tmp;
TLCPORT2 = tmp1;
#endif
}
*/
//this int runs with multiples of half the frequency of timer 1,
//meaning that new row data gets laoded every 2n pwm periods of the tlc
ISR(TIMER0_COMP_vect ) {
uint8_t i, x;
uint8_t y, x, v;
// reset watchdog
wdt_reset();
//sync to timer 1
while(!(TIFR1 & _BV(OCF1A)));
//increment & wrap row counter
if (++row == NUM_ROWS) row = 0;
//shift pixmap as 12 bit words into device
for(y = 0; y < 16; y++) //16 x 12bit
{
//fetch msb
v = (colormap[framebuf[row][y]] >> 4) & 0xF0;
//12
TLCPORT &= ~_BV(TLC_PIN_SIN);
TLCPORT |= (v & 0x80) >> (7-TLC_PIN_SIN);
SCLK();
v <<= 1;
//11
TLCPORT &= ~_BV(TLC_PIN_SIN);
TLCPORT |= (v & 0x80) >> (7-TLC_PIN_SIN);
SCLK();
v <<= 1;
//10
TLCPORT &= ~_BV(TLC_PIN_SIN);
TLCPORT |= (v & 0x80) >> (7-TLC_PIN_SIN);
SCLK();
v <<= 1;
//9
TLCPORT &= ~_BV(TLC_PIN_SIN);
TLCPORT |= (v & 0x80) >> (7-TLC_PIN_SIN);
SCLK();
v <<= 1;
//fetch lsb
v = (colormap[framebuf[row][y]]) & 0xFF;
//8
TLCPORT &= ~_BV(TLC_PIN_SIN);
TLCPORT |= (v & 0x80) >> (7-TLC_PIN_SIN);
SCLK();
v <<= 1;
//7
TLCPORT &= ~_BV(TLC_PIN_SIN);
TLCPORT |= (v & 0x80) >> (7-TLC_PIN_SIN);
SCLK();
v <<= 1;
//6
TLCPORT &= ~_BV(TLC_PIN_SIN);
TLCPORT |= (v & 0x80) >> (7-TLC_PIN_SIN);
SCLK();
v <<= 1;
//5
TLCPORT &= ~_BV(TLC_PIN_SIN);
TLCPORT |= (v & 0x80) >> (7-TLC_PIN_SIN);
SCLK();
v <<= 1;
//4
TLCPORT &= ~_BV(TLC_PIN_SIN);
TLCPORT |= (v & 0x80) >> (7-TLC_PIN_SIN);
SCLK();
v <<= 1;
//3
TLCPORT &= ~_BV(TLC_PIN_SIN);
TLCPORT |= (v & 0x80) >> (7-TLC_PIN_SIN);
SCLK();
v <<= 1;
//2
TLCPORT &= ~_BV(TLC_PIN_SIN);
TLCPORT |= (v & 0x80) >> (7-TLC_PIN_SIN);
SCLK();
v <<= 1;
//1
TLCPORT &= ~_BV(TLC_PIN_SIN);
TLCPORT |= (v & 0x80) >> (7-TLC_PIN_SIN);
SCLK();
v <<= 1;
}
//blank outputs of low-side (column) driver
TLCPORT |= _BV(TLC_PIN_BLANK);
//disable timer 1
TCCR1B &= ~_BV(CS10);
//switch rows
nextrow(row);
// output current row according to current plane
//rowshow(row, plane);
//debug: load 100% duty cycle into column driver
for(i = 0; i < 16; i++) //16 x 12bit
{
//shift in 12 bit words
for(x = 0; x < 12; x++)
{
TLCPORT &= ~_BV(TLC_PIN_SIN);
TLCPORT |= ((uint8_t)((uint16_t)0xFFF >> x) & 1) << TLC_PIN_SIN;
SCLK();
}
}
nextrow();
//latch data, disable blanking, enable and reset timers
XLAT();
TCNT1 = 0;
TIFR1 = _BV(OCF1A)
TLCPORT &= ~_BV(TLC_PIN_BLANK);
TCNT0 = 0; //be a little faster than timer 1
TCCR1B |= _BV(CS10); // clk/1
}
ISR(TIMER1_COMPA_vect)
{
TLCPORT |= _BV(TLC_PIN_BLANK);
TLCPORT &= ~_BV(TLC_PIN_BLANK);
//reset timer
TCNT0 = 0;
}
@ -200,20 +225,14 @@ static void timer0_on() {
TCCR0A = 0x02; // CTC Mode
TCCR0B = 0x04; // clk/256
TCNT0 = 0; // reset timer
OCR0 = 0xFF; // compare with this value
OCR0 = 16; // compare with this value
TIMSK0 = 0x02; // compare match Interrupt on
#else
TCCR0 = 0x0C; // CTC Mode, clk/256
TCNT0 = 0; // reset timer
OCR0 = 0xFF; // compare with this value
OCR0 = 16; // compare with this value
TIMSK = 0x02; // compare match Interrupt on
#endif
//setup timer1 also (for blanking pulse)
TCCR1A = 0x00;
TCCR0B = _BV(WGM12); // CTC Mode
OCR1A = 8192; // top value
TIMSK1 = _BV(OCIE1A); // compare match interrupt on
}
@ -251,6 +270,39 @@ void tlc5940_init()
SCLK();
}
void test_tlc()
{
uint8_t i, x;
while(1)
{
//debug: load 100% duty cycle into column driver
for(i = 0; i < 16; i++) //16 x 12bit
{
//shift in 12 bit words
for(x = 0; x < 12; x++)
{
TLCPORT &= ~_BV(TLC_PIN_SIN);
TLCPORT |= 1<< TLC_PIN_SIN;
SCLK();
}
}
//blank outputs of low-side (column) driver
TLCPORT |= _BV(TLC_PIN_BLANK);
//rowswitch
nextrow();
//latch data, disable blanking
XLAT();
TLCPORT &= ~_BV(TLC_PIN_BLANK);
//delay 4096 gsclocks (256)
_delay_us(254);
}
}
void borg_hw_init() {
//init column driver
@ -262,6 +314,9 @@ void borg_hw_init() {
// reset shift registers for the rows
ROWPORT = 0;
//test tlc chip
//test_tlc();
//activate the activator
timer0_on();

3
borg_hw/config_borg16_hgmod.in
View File

@ -1,9 +1,6 @@
mainmenu_option next_comment
comment "Borg16 HGMod port setup"
#define COLPORT PORTC
#define COLDDR DDRC
choice 'TLC5940 Control Port' \
"PORTA PORTA \
PORTB PORTB \