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ilitek_fastio.c
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ilitek_fastio.c
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/*
* Copyright 2013, 2014 Chris Rhodin <chris@notav8.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "project.h"
#include "ilitek_fastio.h"
#include "bits.h"
#include "pinmap.h"
#include "timers.h"
#include "itty.h"
#include <avr/io.h>
#include <avr/pgmspace.h>
#define SPI_DISABLED (_BV(MSTR) | _BV(CPOL) | _BV(CPHA))
#define SPI_ENABLED (_BV(SPE) | _BV(MSTR) | _BV(CPOL) | _BV(CPHA))
#define spi_enable() do {SPCR = SPI_ENABLED;} while (0)
#define spi_disable() do {SPCR = SPI_DISABLED;} while (0)
/*
* Load ILITEK command, data sequence from FLASH.
*/
void Xilitek_load_sequence_P(uint8_t const * sequence) __attribute__((__naked__));
void Xilitek_load_sequence_P(uint8_t const * sequence)
{
/*
* Set T flag to indicate sequence is in FLASH.
*/
__asm__ __volatile__ (
" set \n"
:::
);
/*
* Jump to the shared load sequence code.
*/
__asm__ __volatile__ (
" # Move sequence pointer to Z \n"
" movw r30, r24 \n"
" rjmp __ilitek_load_sequence \n"
:::
);
}
/*
* Load ILITEK command, data sequence from RAM.
*/
void Xilitek_load_sequence(uint8_t const * sequence) __attribute__((__naked__));
void Xilitek_load_sequence(uint8_t const * sequence)
{
/*
* Clear T flag to indicate sequence is in RAM.
*/
__asm__ __volatile__ (
" clt \n"
" movw r30, r24 \n"
:::
);
/*
* Fall through to the shared load sequence code.
*/
}
/*
* Load ILITEK command, data sequence shared code.
*
* Params: T flag, r31:r30
* Uses: r0, r1 (always returns 0)
*/
void __ilitek_load_sequence(uint8_t const * sequence) __attribute__((__naked__, __used__));
void __ilitek_load_sequence(uint8_t const * sequence)
{
__asm__ __volatile__ (
" .macro ldt dst, src \n"
" # \n"
" # T flag determines the memory space. \n"
" # \n"
" brts . + 4 \n"
" ld \\dst, \\src \n"
" rjmp . + 2 \n"
" lpm \\dst, \\src \n"
" .endm \n"
" \n"
" # Wait for SPI idle \n"
"1: in __tmp_reg__, %[spsr] \n"
" sbrs __tmp_reg__, %[spif] \n"
" rjmp 1b \n"
" \n"
" # Read command length, exit if zero \n" // ok ok ok ok
"2: ldt __zero_reg__, Z+ \n" // 5 9 . 9 .
" tst __zero_reg__ \n" // 1 10 . 10 .
" breq 4f \n" // 1/2 11 . 11 .
" \n"
" # Read and send command \n"
" ldt __tmp_reg__, Z+ \n" // 5 16 . 16 .
" cbi %[portd], %[ilitek_a0] \n" // 2 18 . 18 .
" out %[spdr], __tmp_reg__ \n" // 1 *1 *1 . .
" dec __zero_reg__ \n" // 1 2 2 . .
" breq 2b \n" // 1/2 4 3 . .
" \n"
" clr __tmp_reg__ \n" // 1 . 10 . .
" inc __tmp_reg__ \n" // 1 . . . .
"3: dec __tmp_reg__ \n" // 1 . . . 9
" brpl 3b \n" // 1 . . . 10
" nop \n" // 1 . 11 . 11
" \n"
" # Read and send command parameter \n"
" ldt __tmp_reg__, Z+ \n" // 5 . 16 . 16
" sbi %[portd], %[ilitek_a0] \n" // 2 . 18 . 18
" out %[spdr], __tmp_reg__ \n" // 1 . . *1 *1
" dec __zero_reg__ \n" // 1 . . 2 2
" breq 2b \n" // 1/2 . . 4 3
" nop \n" // 1 . . . 4
" nop \n" // 1 . . . 5
" clr __tmp_reg__ \n" // 1 . . . 6
" rjmp 3b \n" // 2 . . . 8
" \n"
"4: ret \n"
:
: /* i/o registers */
[portd] "I" _SFR_IO_ADDR(PORTD),
[spsr] "I" _SFR_IO_ADDR(SPSR),
[spdr] "I" _SFR_IO_ADDR(SPDR),
/* i/o register bits */
[ilitek_a0] "I" (PORTD7),
[spif] "I" (SPIF)
: "r1", "r30", "r31", "cc"
);
}
/*
* Write out a block of pixels color
*/
void ilitek_fill_color(icount_t count, icolor_t color) __attribute__((__naked__));
void ilitek_fill_color(icount_t count, icolor_t color)
{
__asm__ __volatile__ (
" sbiw r24, 1 \n" // 2 2
" brcs 6f \n" // 1/2 3
" \n"
"1: in r26, %[spsr] \n" // 1 4
" sbrs r26, %[spif] \n" // 1/2 6
" rjmp 1b \n" // 2
" sbi %[portd], %[ilitek_a0] \n" // 2 8
" \n"
"2: out %[spdr], r23 \n" // 1 *1
" ldi r26, 3 \n" // 1 2
"3: dec r26 \n" // 1 3 +6 +9 +12
" brpl 3b \n" // 1 5 +8 +11+13
" nop \n" // 1 14
" sbiw r24, 1 \n" // 2 16
" brcs 5f \n" // 1/2 17/18
" nop \n" // 1 18
" \n"
" out %[spdr], r22 \n" // 1 *1
" ldi r26, 4 \n" // 1 2
"4: dec r26 \n" // 1 3 +6 +9 +12+15
" brpl 4b \n" // 1 5 +8 +11+14+16
" rjmp 2b \n" // 2 18
" \n"
"5: out %[spdr], r22 \n" // 1
"6: ret \n" // 4
:
: /* i/o registers */
[portd] "I" _SFR_IO_ADDR(PORTD),
[spsr] "I" _SFR_IO_ADDR(SPSR),
[spdr] "I" _SFR_IO_ADDR(SPDR),
/* i/o register bits */
[ilitek_a0] "I" (PORTD7),
[spif] "I" (SPIF)
:
);
}
/*
* Write out a single pixels color.
*/
void ilitek_set_pixel_color(icolor_t color) __attribute__((__naked__));
void ilitek_set_pixel_color(icolor_t color)
{
__asm__ __volatile__ (
" movw r22, r24 \n" // 1
" ldi r24, 0x00 \n" // 1
" ldi r25, 0x00 \n" // 1
" rjmp ilitek_fill_color + 4 \n" // 2
:::
);
}
void ilitek_fill_bitmap_P(icount_t count, uint8_t const * bitmap, icolor_t color0, icolor_t color1) __attribute__((__naked__));
void ilitek_fill_bitmap_P(icount_t count, uint8_t const * bitmap, icolor_t color0, icolor_t color1)
{
/*
* Set T flag to indicate bitmap is in FLASH.
*/
__asm__ __volatile__ (
" set \n"
:::
);
/*
* Jump to the shared blit bitmap code.
*/
__asm__ __volatile__ (
" rjmp __ilitek_fill_bitmap \n"
:::
);
}
void ilitek_fill_bitmap(icount_t count, uint8_t const * bitmap, icolor_t color0, icolor_t color1) __attribute__((__naked__));
void ilitek_fill_bitmap(icount_t count, uint8_t const * bitmap, icolor_t color0, icolor_t color1)
{
/*
* Clear T flag to indicate bitmap is in RAM.
*/
__asm__ __volatile__ (
" clt \n"
:::
);
/*
* Fall through to the shared blit bitmap code.
*/
}
static void __ilitek_fill_bitmap(icount_t count, uint8_t const * bitmap, icolor_t color0, icolor_t color1) __attribute__((__naked__, __used__));
static void __ilitek_fill_bitmap(icount_t count, uint8_t const * bitmap, icolor_t color0, icolor_t color1)
{
__asm__ __volatile__ (
" # Move bitmap pointer to Z \n"
" movw r30, r22 \n"
" \n"
" # Wait for SPI idle \n"
"1: in r27, %[spsr] \n"
" sbrs r27, %[spif] \n"
" rjmp 1b \n"
" \n"
" # Set A0 to indicate data \n"
" sbi %[portd], %[ilitek_a0] \n"
" \n"
" # Jump to loop entry point \n"
" rjmp 4f \n"
" \n"
" # Start next full byte \n"
"2: ldi r26, 8 \n" // 1 7
" nop \n" // 1 8
" rjmp 5f \n" // 2 10
" \n"
"3: out %[spdr], r22 \n" // 1 * 1 1
" nop \n" // 1 2 2
" \n"
" # Loop start \n" //
"4: sbiw r24, 8 \n" // 2 4 4
" brsh 2b \n" // 1/2 6 5
" adiw r24, 8 \n" // 2 7
" breq 9f \n" // 1/2 8
" mov r26, r24 \n" // 1 9
" clr r24 \n" // 1 10
" \n"
" # Load next byte \n"
"5: ldt __tmp_reg__, Z+ \n" // 5 15 15
" \n"
" # Bit value determines color \n"
"6: movw r22, r18 \n" // 1 16 16 16
" sbrs __tmp_reg__, 7 \n" // 1(2) 17 17 17
" movw r22, r20 \n" // 1(0) 18 18 18
" \n"
" out %[spdr], r23 \n" // 1 *1 1 1
" ldi r27, 3 \n" // 1 2 2 2
"7: dec r27 \n" // 1 3 +6 +9 +12
" brpl 7b \n" // 1/2 5 +8 +11+13
" nop \n" // 1 14 14 14
" nop \n" // 1 15 15 15
" dec r26 \n" // 1 16 16 16
" breq 3b \n" // 1/2 17 18 18
" lsl __tmp_reg__ \n" // 1 18
" out %[spdr], r22 \n" // 1 *1
" ldi r27, 3 \n" // 1 2
"8: dec r27 \n" // 1 3 +6 +9 +12
" brpl 8b \n" // 1/2 5 +8 +11+13
" rjmp 6b \n" // 2 15
" \n"
"9: ret \n"
:
: /* i/o registers */
[portd] "I" _SFR_IO_ADDR(PORTD),
[spsr] "I" _SFR_IO_ADDR(SPSR),
[spdr] "I" _SFR_IO_ADDR(SPDR),
/* i/o register bits */
// [ilitek_a0] "I" (PORTD7),
[ilitek_a0] "I" (PORTD7),
[spif] "I" (SPIF)
:
);
}
/*
* Set the display data access window. Leaves the ILITEK ready to accept data.
*/
void ilitek_set_access_window(idim_t x, idim_t x_size, idim_t y, idim_t y_size)
{
static uint8_t set_access_window_seq[] = {
GR_COMMAND(SET_COLUMN_ADDRESS, 4),
0x00, 0x00, 0x00, 0x00,
GR_COMMAND(SET_PAGE_ADDRESS, 4),
0x00, 0x00, 0x00, 0x00,
GR_COMMAND(WRITE_MEMORY_START, 0),
GR_STOP
};
/* set the coordinates */
x += X_ORIGIN;
set_access_window_seq[2] = x >> 8;
set_access_window_seq[3] = x;
x += x_size - 1;
set_access_window_seq[4] = x >> 8;
set_access_window_seq[5] = x;
y += Y_ORIGIN;
set_access_window_seq[8] = y >> 8;
set_access_window_seq[9] = y;
y += y_size - 1;
set_access_window_seq[10] = y >> 8;
set_access_window_seq[11] = y;
/* send it to the ILITEK */
ilitek_load_sequence(set_access_window_seq);
}
/*
* Fill the ILITEK color lookup table with a flat set of entries.
*/
void ilitek_load_default_lut(void)
{
static const uint8_t load_default_lut_seq[] __ATTR_PROGMEM__ = {
GR_COMMAND(WRITE_LUT, 128),
0, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30,
33, 35, 37, 39, 41, 43, 45, 47, 49, 51, 53, 55, 57, 59, 61, 63,
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, 27, 28, 29, 30, 31,
32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,
48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63,
0, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30,
33, 35, 37, 39, 41, 43, 45, 47, 49, 51, 53, 55, 57, 59, 61, 63,
GR_STOP
};
ilitek_load_sequence_P(load_default_lut_seq);
}
/*
* Fill the whole display with a single color. Leaves the ILITEK ready to accept data.
*/
void ilitek_fill_root_window(icolor_t color)
{
static const uint8_t root_fill_seq[] __ATTR_PROGMEM__ = {
GR_COMMAND(SET_COLUMN_ADDRESS, 4),
GR_WORD(X_ORIGIN), GR_WORD(X_ORIGIN + X_SIZE - 1),
GR_COMMAND(SET_PAGE_ADDRESS, 4),
GR_WORD(Y_ORIGIN), GR_WORD(Y_ORIGIN + Y_SIZE - 1),
GR_COMMAND(WRITE_MEMORY_START, 0),
GR_STOP
};
ilitek_load_sequence_P(root_fill_seq);
ilitek_fill_color((icount_t) X_SIZE * Y_SIZE, color);
}
/*
* Set the color of the specified pixel.
*/
void ilitek_draw_pixel(idim_t x, idim_t y, icolor_t color)
{
static uint8_t draw_pixel_seq[] = {
GR_COMMAND(SET_COLUMN_ADDRESS, 4),
0x00, 0x00, GR_WORD(X_ORIGIN + X_SIZE - 1),
GR_COMMAND(SET_PAGE_ADDRESS, 4),
0x00, 0x00, GR_WORD(Y_ORIGIN + Y_SIZE - 1),
GR_COMMAND(WRITE_MEMORY_START, 2),
0x00, 0x00,
GR_STOP
};
/* set the coordinates */
x += X_ORIGIN;
draw_pixel_seq[2] = x >> 8;
draw_pixel_seq[3] = x;
y += Y_ORIGIN;
draw_pixel_seq[8] = y >> 8;
draw_pixel_seq[9] = y;
/* set the color */
draw_pixel_seq[14] = color >> 8;
draw_pixel_seq[15] = color;
/* send it to the ILITEK */
ilitek_load_sequence(draw_pixel_seq);
}
/*
* Fill the specified rectangle with a single color.
*/
void ilitek_draw_rect(idim_t x, idim_t x_size, idim_t y, idim_t y_size, icolor_t color)
{
ilitek_set_access_window(x, x_size, y, y_size);
ilitek_fill_color(x_size * y_size, color);
}
void ilitek_send_command(uint8_t command)
{
while (!bit_test(&SPSR, SPIF));
pinmap_clear(ILITEK_A0);
SPDR = command;
}
void ilitek_send_data(uint8_t data)
{
while (!bit_test(&SPSR, SPIF));
pinmap_set(ILITEK_A0);
SPDR = data;
}
/*
* Draw a one pixel wide box.
*/
void ilitek_draw_box(irect_s rect, icolor_t color)
{
ilitek_draw_rect(rect.x, rect.x_size, rect.y, 1, color);
ilitek_draw_rect(rect.x, rect.x_size, rect.y + rect.y_size - 1, 1, color);
ilitek_draw_rect(rect.x, 1, rect.y + 1, rect.y_size - 2, color);
ilitek_draw_rect(rect.x + rect.x_size - 1, 1, rect.y + 1, rect.y_size - 2, color);
}
void ilitek_draw_bitmap_P(idim_t x, idim_t x_size, idim_t y, idim_t y_size,
uint8_t const * bitmap, icolor_t color0, icolor_t color1)
{
ilitek_set_access_window(x, x_size, y, y_size);
ilitek_fill_bitmap_P(x_size * y_size, bitmap, color0, color1);
}
void ilitek_draw_bitmap(idim_t x, idim_t x_size, idim_t y, idim_t y_size,
uint8_t const * bitmap, icolor_t color0, icolor_t color1)
{
ilitek_set_access_window(x, x_size, y, y_size);
ilitek_fill_bitmap(x_size * y_size, bitmap, color0, color1);
}
static uint8_t draw_mask_seq[] = {
GR_COMMAND(SET_COLUMN_ADDRESS, 4),
0x00, 0x00, 0x00, 0x00,
GR_COMMAND(SET_PAGE_ADDRESS, 4),
0x00, 0x00, 0x00, 0x00,
GR_COMMAND(WRITE_MEMORY_START, 2),
0x00, 0x00,
GR_STOP
};
void ilitek_draw_mask_P(idim_t x, idim_t x_size, idim_t y, idim_t y_size,
uint8_t const * mask, icolor_t color)
{
uint16_t xs;
uint16_t xe;
uint16_t ys;
uint16_t ye;
uint8_t byte;
uint8_t bit;
/* set the color */
draw_mask_seq[14] = color >> 8;
draw_mask_seq[15] = color;
/* translate to physical coordinates */
xs = X_ORIGIN + x;
ys = Y_ORIGIN + y;
xe = xs + x_size - 1;
ye = ys + y_size - 1;
/* the bottom right coordinates are fixed */
draw_mask_seq[4] = xe >> 8;
draw_mask_seq[5] = xe;
draw_mask_seq[10] = ye >> 8;
draw_mask_seq[11] = ye;
bit = 0;
for (y = ys; y <= ye; y++) {
for (x = xs; x <= xe; x++) {
if (bit == 0) {
byte = pgm_read_byte(mask++);
bit = 8;
}
if (byte & 0x80) {
draw_mask_seq[2] = x >> 8;
draw_mask_seq[3] = x;
draw_mask_seq[8] = y >> 8;
draw_mask_seq[9] = y;
Xilitek_load_sequence(draw_mask_seq);
}
byte <<= 1;
bit--;
}
}
}
void ilitek_draw_mask(idim_t x, idim_t x_size, idim_t y, idim_t y_size,
uint8_t const * mask, icolor_t color)
{
uint16_t xs;
uint16_t xe;
uint16_t ys;
uint16_t ye;
uint8_t byte;
uint8_t bit;
/* set the color */
draw_mask_seq[14] = color >> 8;
draw_mask_seq[15] = color;
/* translate to physical coordinates */
xs = X_ORIGIN + x;
ys = Y_ORIGIN + y;
xe = xs + x_size - 1;
ye = ys + y_size - 1;
/* the bottom right coordinates are fixed */
draw_mask_seq[4] = xe >> 8;
draw_mask_seq[5] = xe;
draw_mask_seq[10] = ye >> 8;
draw_mask_seq[11] = ye;
bit = 0;
for (y = ys; y <= ye; y++) {
for (x = xs; x <= xe; x++) {
if (bit == 0) {
byte = *mask++;
bit = 8;
}
if (byte & 0x80) {
draw_mask_seq[2] = x >> 8;
draw_mask_seq[3] = x;
draw_mask_seq[8] = y >> 8;
draw_mask_seq[9] = y;
Xilitek_load_sequence(draw_mask_seq);
}
byte <<= 1;
bit--;
}
}
}
static const uint8_t ilitek_init_seq[] __ATTR_PROGMEM__ = {
GR_COMMAND(SET_PIXEL_FORMAT, 1),
0x05,
GR_COMMAND(SET_GAMMA_CURVE, 1),
0x04,
GR_COMMAND(GAM_R_SEL, 1),
0x01,
GR_COMMAND(POSITIVE_GAMMA_CORRECT, 15),
0x3f, 0x25, 0x1c, 0x1e, 0x20, 0x12, 0x2a, 0x90,
0x24, 0x11, 0x00, 0x00, 0x00, 0x00, 0x00,
GR_COMMAND(NEGATIVE_GAMMA_CORRECT, 15),
0x20, 0x20, 0x20, 0x20, 0x05, 0x00, 0x15, 0xa7,
0x3d, 0x18, 0x25, 0x2a, 0x2b, 0x2b, 0x3a,
GR_COMMAND(FRAME_RATE_CONTROL1, 2),
0x08, 0x08,
GR_COMMAND(DISPLAY_INVERSION, 1),
0x01,
GR_COMMAND(POWER_CONTROL1, 2),
0x0a, 0x02,
GR_COMMAND(POWER_CONTROL2, 1),
0x02,
GR_COMMAND(VCOM_CONTROL1, 2),
0x50, 0x5b,
GR_COMMAND(VCOM_OFFSET_CONTROL, 1),
0x40,
GR_COMMAND(SET_ADDRESS_MODE, 1),
0x00,
GR_STOP
};
/*
* Hard reset LCD and initialize interface.
*/
void ilitek_init(void)
{
/* initialize the SPI and LCD pins */
pinmap_set(ILITEK_SCK | ILITEK_SI | ILITEK_CS | ILITEK_RES | ILITEK_A0);
pinmap_dir(0, ILITEK_SCK | ILITEK_SI | ILITEK_CS | ILITEK_RES | ILITEK_A0);
/* pulse ILITEK_RES low */
pinmap_clear(ILITEK_RES);
timebase_delay(TBTICKS_FROM_US(20));
pinmap_set(ILITEK_RES);
/* initialize the SPI port */
spi_disable();
SPSR = _BV(SPI2X);
spi_enable();
/* 120 ms internal reset processing */
timer_delay(TBTICKS_FROM_MS(120));
/* select the LCD and send a NOP to prime SPIF */
pinmap_clear(ILITEK_CS);
pinmap_clear(ILITEK_A0);
SPDR = NOP;
#if 0
/* bring the LCD out of sleep mode */
ilitek_send_command(EXIT_SLEEP_MODE);
while (!bit_test(&SPSR, SPIF));
/* 120 ms internal reset processing */
timer_delay(TBTICKS_FROM_MS(120));
ilitek_load_sequence_P(ilitek_init_seq);
ilitek_load_default_lut();
ilitek_fill_root_window(0x0000);
ilitek_send_command(SET_DISPLAY_ON);
#endif
}