new hardware driver, still beta

This commit is contained in:
Hans-Gert Dahmen 2011-12-21 04:54:48 +00:00
parent 9c07418f23
commit 6325170d1c
2 changed files with 250 additions and 1 deletions

View File

@ -10,6 +10,10 @@ ifeq ($(BORG_HW),HW_BORG_16)
SRC = borg_hw_borg16.c
endif
ifeq ($(BORG_HW),HW_BORG_16_HGM)
SRC = borg_hw_borg16_hgmod.c
endif
ifeq ($(BORG_HW),HW_BORG_ANDRE)
SRC = borg_hw_andreborg.c
endif

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@ -0,0 +1,245 @@
#include "../config.h"
#include "../makros.h"
#include <avr/interrupt.h>
#include <avr/io.h>
#include <avr/wdt.h>
#include "borg_hw.h"
/*
// those macros get defined via menuconfig, now
*/
#define TLC_PIN_SIN 0
#define TLC_PIN_SCLK 1
#define TLC_PIN_SOUT 5
#define TLC_PIN_XLAT 2
#define TLC_PIN_BLANK 3
#define TLC_PIN_VPRG 7
#define TLC_PIN_DCPRG 4
#define TLC_PIN_XERR 6
#define COLDDR DDR(COLPORT)
#define ROWDDR DDR(ROWPORT)
#define SCLK() { \
COLPORT |= _BV(TLC_PIN_SCLK); \
COLPORT &= ~_BV(TLC_PIN_SCLK); \
}
#define XLAT() { \
COLPORT |= _BV(TLC_PIN_XLAT); \
COLPORT &= ~_BV(TLC_PIN_XLAT); \
}
/* more ifdef magic :-( */
#ifdef __AVR_ATmega644P__
#define OCR0 OCR0A
#define SIG_OUTPUT_COMPARE0 SIG_OUTPUT_COMPARE0A
#endif
// buffer which holds the currently shown frame
unsigned char pixmap[NUMPLANE][NUM_ROWS][LINEBYTES];
// switch to next row
static void nextrow(uint8_t row) {
unsigned char i;
static unsigned char row = 0;
//blank outputs of low-side (column) driver
COLPORT |= _BV(TLC_PIN_BLANK);
//increment & wrap row counter
if (++row == NUM_ROWS) row = 0;
// short delay loop, to ensure proper deactivation of the drivers
for (i = 0; i < 10; i++) asm volatile("nop");
// row 0: initialize first shift register
if (row == 0)
{
#ifndef INVERT_ROWS
ROWPORT &= ~(1 << PIN_MCLR);
ROWPORT |= (1 << PIN_MCLR);
ROWPORT |= (1 << PIN_DATA);
ROWPORT |= (1 << PIN_CLK);
ROWPORT &= ~(1 << PIN_CLK);
ROWPORT &= ~(1 << PIN_DATA);
#else
ROWPORT&= ~(1<<PIN_DATA);
ROWPORT|= (1<<PIN_CLK);
ROWPORT&= ~(1<<PIN_CLK);
ROWPORT|= (1<<PIN_DATA);
#endif
}
// remaining rows: just shift forward
else
{
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
COLPORT2 = 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
COLPORT1 = tmp;
#else
COLPORT1 = tmp;
COLPORT2 = tmp1;
#endif
}
*/
// depending on the plane this interrupt triggers at 50 kHz, 31.25 kHz or
// 12.5 kHz
SIGNAL(SIG_OUTPUT_COMPARE0) {
uint8_t i, x;
// reset watchdog
wdt_reset();
// 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++)
{
COLPORT &= ~_BV(TLC_PIN_SIN);
COLPORT |= ((uint8_t)((uint16_t)0xFFF >> x) & 1) << TLC_PIN_SIN;
SCLK();
}
}
//latch data and disable blanking
XLAT();
COLPORT &= ~_BV(TLC_PIN_BLANK);
}
void timer0_off() {
cli();
COLPORT = 0;
ROWPORT = 0;
#ifdef __AVR_ATmega644P__
TCCR0A = 0x00;
TCCR0B = 0x00;
#else
TCCR0 = 0x00;
#endif
sei();
}
// initialize timer which triggers the interrupt
static void timer0_on() {
/* TCCR0: FOC0 WGM00 COM01 COM00 WGM01 CS02 CS01 CS00
* CS02 CS01 CS00
* 0 0 0 stop
* 0 0 1 clk
* 0 1 0 clk/8
* 0 1 1 clk/64
* 1 0 0 clk/256
* 1 0 1 clk/1024
*/
#ifdef __AVR_ATmega644P__
TCCR0A = 0x02; // CTC Mode
TCCR0B = 0x04; // clk/256
TCNT0 = 0; // reset timer
OCR0 = 20; // compare with this value
TIMSK0 = 0x02; // compare match Interrupt on
#else
TCCR0 = 0x0C; // CTC Mode, clk/256
TCNT0 = 0; // reset timer
OCR0 = 20; // compare with this value
TIMSK = 0x02; // compare match Interrupt on
#endif
}
void tlc5940_init()
{
uint8_t i;
//init control port pins
COLDDR = 0x00;
COLDDR = _BV(TLC_PIN_SCLK) | _BV(TLC_PIN_SIN)
| _BV(TLC_PIN_XLAT) | _BV(TLC_PIN_BLANK)
| _BV(TLC_PIN_VPRG) | _BV(TLC_PIN_DCPRG);
//switch off all outputs and pull-ups
//xerr is open-drain, enable PUP
//set blank flag (disable led-outputs)
//dcprog is high -> use values from dc register
//vprg is high -> dot correction mode mode
COLPORT = _BV(TLC_PIN_XERR) | _BV(TLC_PIN_BLANK) | _BV(TLC_PIN_DCPRG) | _BV(TLC_PIN_VPRG);
//set max power (6bit * 16 LEDs)
COLPORT |= _BV(TLC_PIN_SIN);
for(i = 0; i < 96; i++) SCLK();
XLAT();
//switch to grayscale mode
COLPORT &= ~_BV(TLC_PIN_VPRG);
//flush input shift register (12bit * 16 LEDs)
COLPORT &= ~_BV(TLC_PIN_SIN);
for(i = 0; i < 192; i++) SCLK();
XLAT();
//one extra clk pulse is needed after switching from dc mode
SCLK();
}
void borg_hw_init() {
//init column driver
tlc5940_init();
// switch pins of the row port to output mode
ROWDDR = (1 << PIN_MCLR) | (1 << PIN_CLK) | (1 << PIN_DATA);
// reset shift registers for the rows
ROWPORT = 0;
//activate the activator
timer0_on();
// activate watchdog timer
wdt_reset();
wdt_enable(0x00); // 17ms watchdog
}