307 lines
8.7 KiB
C
307 lines
8.7 KiB
C
/*
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Copyright 2016 Fred Sundvik <fsundvik@gmail.com>
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "gfx.h"
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#if GFX_USE_GDISP
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#define GDISP_DRIVER_VMT GDISPVMT_IS31FL3731C_ERGODOX
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#include "drivers/gdisp/IS31FL3731C/gdisp_lld_config.h"
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#include "src/gdisp/gdisp_driver.h"
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#include "board_IS31FL3731C.h"
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// Can't include led_tables from here
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extern const uint8_t CIE1931_CURVE[];
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/*===========================================================================*/
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/* Driver local definitions. */
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/*===========================================================================*/
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#ifndef GDISP_SCREEN_HEIGHT
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#define GDISP_SCREEN_HEIGHT 9
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#endif
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#ifndef GDISP_SCREEN_WIDTH
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#define GDISP_SCREEN_WIDTH 16
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#endif
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#ifndef GDISP_INITIAL_CONTRAST
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#define GDISP_INITIAL_CONTRAST 0
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#endif
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#ifndef GDISP_INITIAL_BACKLIGHT
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#define GDISP_INITIAL_BACKLIGHT 100
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#endif
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#define GDISP_FLG_NEEDFLUSH (GDISP_FLG_DRIVER<<0)
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#define IS31_ADDR_DEFAULT 0x74
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#define IS31_REG_CONFIG 0x00
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// bits in reg
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#define IS31_REG_CONFIG_PICTUREMODE 0x00
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#define IS31_REG_CONFIG_AUTOPLAYMODE 0x08
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#define IS31_REG_CONFIG_AUDIOPLAYMODE 0x18
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// D2:D0 bits are starting frame for autoplay mode
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#define IS31_REG_PICTDISP 0x01 // D2:D0 frame select for picture mode
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#define IS31_REG_AUTOPLAYCTRL1 0x02
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// D6:D4 number of loops (000=infty)
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// D2:D0 number of frames to be used
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#define IS31_REG_AUTOPLAYCTRL2 0x03 // D5:D0 delay time (*11ms)
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#define IS31_REG_DISPLAYOPT 0x05
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#define IS31_REG_DISPLAYOPT_INTENSITY_SAME 0x20 // same intensity for all frames
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#define IS31_REG_DISPLAYOPT_BLINK_ENABLE 0x8
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// D2:D0 bits blink period time (*0.27s)
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#define IS31_REG_AUDIOSYNC 0x06
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#define IS31_REG_AUDIOSYNC_ENABLE 0x1
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#define IS31_REG_FRAMESTATE 0x07
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#define IS31_REG_BREATHCTRL1 0x08
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// D6:D4 fade out time (26ms*2^i)
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// D2:D0 fade in time (26ms*2^i)
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#define IS31_REG_BREATHCTRL2 0x09
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#define IS31_REG_BREATHCTRL2_ENABLE 0x10
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// D2:D0 extinguish time (3.5ms*2^i)
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#define IS31_REG_SHUTDOWN 0x0A
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#define IS31_REG_SHUTDOWN_OFF 0x0
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#define IS31_REG_SHUTDOWN_ON 0x1
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#define IS31_REG_AGCCTRL 0x0B
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#define IS31_REG_ADCRATE 0x0C
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#define IS31_COMMANDREGISTER 0xFD
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#define IS31_FUNCTIONREG 0x0B // helpfully called 'page nine'
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#define IS31_FUNCTIONREG_SIZE 0xD
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#define IS31_FRAME_SIZE 0xB4
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#define IS31_PWM_REG 0x24
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#define IS31_PWM_SIZE 0x90
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#define IS31_LED_MASK_SIZE 0x12
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#define IS31_SCREEN_WIDTH 16
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#define IS31
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/*===========================================================================*/
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/* Driver local functions. */
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/*===========================================================================*/
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typedef struct{
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uint8_t write_buffer_offset;
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uint8_t write_buffer[IS31_FRAME_SIZE];
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uint8_t frame_buffer[GDISP_SCREEN_HEIGHT * GDISP_SCREEN_WIDTH];
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uint8_t page;
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}__attribute__((__packed__)) PrivData;
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// Some common routines and macros
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#define PRIV(g) ((PrivData*)g->priv)
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/*===========================================================================*/
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/* Driver exported functions. */
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/*===========================================================================*/
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static GFXINLINE void write_page(GDisplay* g, uint8_t page) {
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uint8_t tx[2] __attribute__((aligned(2)));
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tx[0] = IS31_COMMANDREGISTER;
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tx[1] = page;
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write_data(g, tx, 2);
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}
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static GFXINLINE void write_register(GDisplay* g, uint8_t page, uint8_t reg, uint8_t data) {
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uint8_t tx[2] __attribute__((aligned(2)));
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tx[0] = reg;
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tx[1] = data;
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write_page(g, page);
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write_data(g, tx, 2);
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}
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static GFXINLINE void write_ram(GDisplay *g, uint8_t page, uint16_t offset, uint16_t length) {
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PRIV(g)->write_buffer_offset = offset;
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write_page(g, page);
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write_data(g, (uint8_t*)PRIV(g), length + 1);
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}
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LLDSPEC bool_t gdisp_lld_init(GDisplay *g) {
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// The private area is the display surface.
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g->priv = gfxAlloc(sizeof(PrivData));
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__builtin_memset(PRIV(g), 0, sizeof(PrivData));
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PRIV(g)->page = 0;
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// Initialise the board interface
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init_board(g);
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gfxSleepMilliseconds(10);
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// zero function page, all registers (assuming full_page is all zeroes)
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write_ram(g, IS31_FUNCTIONREG, 0, IS31_FUNCTIONREG_SIZE);
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set_hardware_shutdown(g, false);
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gfxSleepMilliseconds(10);
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// software shutdown
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write_register(g, IS31_FUNCTIONREG, IS31_REG_SHUTDOWN, IS31_REG_SHUTDOWN_OFF);
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gfxSleepMilliseconds(10);
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// zero function page, all registers
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write_ram(g, IS31_FUNCTIONREG, 0, IS31_FUNCTIONREG_SIZE);
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gfxSleepMilliseconds(10);
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// zero all LED registers on all 8 pages, and enable the mask
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__builtin_memcpy(PRIV(g)->write_buffer, get_led_mask(g), IS31_LED_MASK_SIZE);
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for(uint8_t i=0; i<8; i++) {
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write_ram(g, i, 0, IS31_FRAME_SIZE);
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gfxSleepMilliseconds(1);
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}
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// software shutdown disable (i.e. turn stuff on)
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write_register(g, IS31_FUNCTIONREG, IS31_REG_SHUTDOWN, IS31_REG_SHUTDOWN_ON);
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gfxSleepMilliseconds(10);
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// Finish Init
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post_init_board(g);
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/* Initialise the GDISP structure */
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g->g.Width = GDISP_SCREEN_WIDTH;
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g->g.Height = GDISP_SCREEN_HEIGHT;
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g->g.Orientation = GDISP_ROTATE_0;
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g->g.Powermode = powerOn;
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g->g.Backlight = GDISP_INITIAL_BACKLIGHT;
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g->g.Contrast = GDISP_INITIAL_CONTRAST;
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return TRUE;
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}
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#if GDISP_HARDWARE_FLUSH
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LLDSPEC void gdisp_lld_flush(GDisplay *g) {
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// Don't flush if we don't need it.
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if (!(g->flags & GDISP_FLG_NEEDFLUSH))
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return;
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PRIV(g)->page++;
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PRIV(g)->page %= 2;
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// TODO: some smarter algorithm for this
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// We should run only one physical page at a time
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// This way we don't need to send so much data, and
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// we could use slightly less memory
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uint8_t* src = PRIV(g)->frame_buffer;
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for (int y=0;y<GDISP_SCREEN_HEIGHT;y++) {
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for (int x=0;x<GDISP_SCREEN_WIDTH;x++) {
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PRIV(g)->write_buffer[get_led_address(g, x, y)]=CIE1931_CURVE[*src];
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++src;
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}
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}
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write_ram(g, PRIV(g)->page, IS31_PWM_REG, IS31_PWM_SIZE);
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gfxSleepMilliseconds(1);
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write_register(g, IS31_FUNCTIONREG, IS31_REG_PICTDISP, PRIV(g)->page);
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g->flags &= ~GDISP_FLG_NEEDFLUSH;
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}
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#endif
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#if GDISP_HARDWARE_DRAWPIXEL
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LLDSPEC void gdisp_lld_draw_pixel(GDisplay *g) {
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coord_t x, y;
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switch(g->g.Orientation) {
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default:
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case GDISP_ROTATE_0:
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x = g->p.x;
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y = g->p.y;
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break;
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case GDISP_ROTATE_180:
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x = GDISP_SCREEN_WIDTH-1 - g->p.x;
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y = g->p.y;
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break;
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}
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PRIV(g)->frame_buffer[y * GDISP_SCREEN_WIDTH + x] = gdispColor2Native(g->p.color);
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g->flags |= GDISP_FLG_NEEDFLUSH;
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}
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#endif
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#if GDISP_HARDWARE_PIXELREAD
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LLDSPEC color_t gdisp_lld_get_pixel_color(GDisplay *g) {
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coord_t x, y;
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switch(g->g.Orientation) {
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default:
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case GDISP_ROTATE_0:
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x = g->p.x;
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y = g->p.y;
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break;
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case GDISP_ROTATE_180:
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x = GDISP_SCREEN_WIDTH-1 - g->p.x;
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y = g->p.y;
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break;
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}
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return gdispNative2Color(PRIV(g)->frame_buffer[y * GDISP_SCREEN_WIDTH + x]);
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}
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#endif
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#if GDISP_NEED_CONTROL && GDISP_HARDWARE_CONTROL
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LLDSPEC void gdisp_lld_control(GDisplay *g) {
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switch(g->p.x) {
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case GDISP_CONTROL_POWER:
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if (g->g.Powermode == (powermode_t)g->p.ptr)
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return;
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switch((powermode_t)g->p.ptr) {
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case powerOff:
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case powerSleep:
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case powerDeepSleep:
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write_register(g, IS31_FUNCTIONREG, IS31_REG_SHUTDOWN, IS31_REG_SHUTDOWN_OFF);
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break;
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case powerOn:
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write_register(g, IS31_FUNCTIONREG, IS31_REG_SHUTDOWN, IS31_REG_SHUTDOWN_ON);
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break;
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default:
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return;
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}
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g->g.Powermode = (powermode_t)g->p.ptr;
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return;
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case GDISP_CONTROL_ORIENTATION:
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if (g->g.Orientation == (orientation_t)g->p.ptr)
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return;
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switch((orientation_t)g->p.ptr) {
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/* Rotation is handled by the drawing routines */
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case GDISP_ROTATE_0:
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case GDISP_ROTATE_180:
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g->g.Height = GDISP_SCREEN_HEIGHT;
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g->g.Width = GDISP_SCREEN_WIDTH;
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break;
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case GDISP_ROTATE_90:
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case GDISP_ROTATE_270:
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g->g.Height = GDISP_SCREEN_WIDTH;
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g->g.Width = GDISP_SCREEN_HEIGHT;
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break;
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default:
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return;
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}
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g->g.Orientation = (orientation_t)g->p.ptr;
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return;
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case GDISP_CONTROL_CONTRAST:
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return;
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}
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}
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#endif // GDISP_NEED_CONTROL
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#endif // GFX_USE_GDISP
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