489 lines
14 KiB
C
489 lines
14 KiB
C
/*
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* This file is subject to the terms of the GFX License. If a copy of
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* the license was not distributed with this file, you can obtain one at:
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*
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* http://ugfx.org/license.html
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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_STM32LTDC
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#include "gdisp_lld_config.h"
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#include "../../../src/gdisp/gdisp_driver.h"
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#if defined(GDISP_SCREEN_HEIGHT)
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#warning "GDISP: This low level driver does not support setting a screen size. It is being ignored."
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#undef GISP_SCREEN_HEIGHT
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#endif
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#if defined(GDISP_SCREEN_WIDTH)
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#warning "GDISP: This low level driver does not support setting a screen size. It is being ignored."
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#undef GDISP_SCREEN_WIDTH
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#endif
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#ifndef LTDC_USE_DMA2D
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#define LTDC_USE_DMA2D FALSE
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#endif
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#ifndef LTDC_NO_CLOCK_INIT
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#define LTDC_NO_CLOCK_INIT FALSE
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#endif
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#include "stm32_ltdc.h"
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#if LTDC_USE_DMA2D
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#include "stm32_dma2d.h"
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#endif
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typedef struct ltdcLayerConfig {
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// Frame
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LLDCOLOR_TYPE* frame; // Frame buffer address
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coord_t width, height; // Frame size in pixels
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coord_t pitch; // Line pitch, in bytes
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uint16_t fmt; // Pixel format in LTDC format
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// Window
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coord_t x, y; // Start pixel position of the virtual layer
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coord_t cx, cy; // Size of the virtual layer
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uint32_t defcolor; // Default color, ARGB8888
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uint32_t keycolor; // Color key, RGB888
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uint32_t blending; // Blending factors
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const uint32_t* palette; // The palette, RGB888 (can be NULL)
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uint16_t palettelen; // Palette length
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uint8_t alpha; // Constant alpha factor
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uint8_t layerflags; // Layer configuration
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} ltdcLayerConfig;
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typedef struct ltdcConfig {
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coord_t width, height; // Screen size
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coord_t hsync, vsync; // Horizontal and Vertical sync pixels
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coord_t hbackporch, vbackporch; // Horizontal and Vertical back porch pixels
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coord_t hfrontporch, vfrontporch; // Horizontal and Vertical front porch pixels
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uint32_t syncflags; // Sync flags
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uint32_t bgcolor; // Clear screen color RGB888
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ltdcLayerConfig bglayer; // Background layer config
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ltdcLayerConfig fglayer; // Foreground layer config
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} ltdcConfig;
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#define LTDC_UNUSED_LAYER_CONFIG { 0, 1, 1, 1, LTDC_FMT_L8, 0, 0, 1, 1, 0x000000, 0x000000, LTDC_BLEND_FIX1_FIX2, 0, 0, 0, 0 }
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#if GDISP_LLD_PIXELFORMAT == GDISP_PIXELFORMAT_RGB565
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#define LTDC_PIXELFORMAT LTDC_FMT_RGB565
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#define LTDC_PIXELBYTES 2
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#define LTDC_PIXELBITS 16
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#elif GDISP_LLD_PIXELFORMAT == GDISP_PIXELFORMAT_RGB888
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#define LTDC_PIXELFORMAT LTDC_FMT_ARGB8888
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#define LTDC_PIXELBYTES 4
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#define LTDC_PIXELBITS 32
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#else
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#error "GDISP: STM32LTDC - unsupported pixel format"
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#endif
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#include "board_STM32LTDC.h"
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/*===========================================================================*/
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/* Driver local definitions. */
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/*===========================================================================*/
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#ifndef GDISP_INITIAL_CONTRAST
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#define GDISP_INITIAL_CONTRAST 50
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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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/*===========================================================================*/
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/* Driver local routines. */
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/*===========================================================================*/
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#define PIXIL_POS(g, x, y) ((y) * driverCfg.bglayer.pitch + (x) * LTDC_PIXELBYTES)
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#define PIXEL_ADDR(g, pos) ((LLDCOLOR_TYPE *)((uint8_t *)driverCfg.bglayer.frame+pos))
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/*===========================================================================*/
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/* Driver exported functions. */
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/*===========================================================================*/
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static void _ltdc_reload(void) {
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LTDC->SRCR |= LTDC_SRCR_IMR;
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while (LTDC->SRCR & (LTDC_SRCR_IMR | LTDC_SRCR_VBR))
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gfxYield();
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}
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static void _ltdc_layer_init(LTDC_Layer_TypeDef* pLayReg, const ltdcLayerConfig* pCfg) {
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static const uint8_t fmt2Bpp[] = {
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4, /* LTDC_FMT_ARGB8888 */
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3, /* LTDC_FMT_RGB888 */
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2, /* LTDC_FMT_RGB565 */
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2, /* LTDC_FMT_ARGB1555 */
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2, /* LTDC_FMT_ARGB4444 */
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1, /* LTDC_FMT_L8 */
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1, /* LTDC_FMT_AL44 */
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2 /* LTDC_FMT_AL88 */
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};
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uint32_t start, stop;
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// Set the framebuffer dimensions and format
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pLayReg->PFCR = (pLayReg->PFCR & ~LTDC_LxPFCR_PF) | ((uint32_t)pCfg->fmt & LTDC_LxPFCR_PF);
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pLayReg->CFBAR = (uint32_t)pCfg->frame & LTDC_LxCFBAR_CFBADD;
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pLayReg->CFBLR = ((((uint32_t)pCfg->pitch << 16) & LTDC_LxCFBLR_CFBP) | (((uint32_t)fmt2Bpp[pCfg->fmt] * pCfg->width + 3) & LTDC_LxCFBLR_CFBLL));
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pLayReg->CFBLNR = (uint32_t)pCfg->height & LTDC_LxCFBLNR_CFBLNBR;
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// Set the display window boundaries
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start = (uint32_t)pCfg->x + driverCfg.hsync + driverCfg.hbackporch;
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stop = start + pCfg->cx - 1;
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pLayReg->WHPCR = ((start << 0) & LTDC_LxWHPCR_WHSTPOS) | ((stop << 16) & LTDC_LxWHPCR_WHSPPOS);
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start = (uint32_t)pCfg->y + driverCfg.vsync + driverCfg.vbackporch;
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stop = start + pCfg->cy - 1;
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pLayReg->WVPCR = ((start << 0) & LTDC_LxWVPCR_WVSTPOS) | ((stop << 16) & LTDC_LxWVPCR_WVSPPOS);
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// Set colors
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pLayReg->DCCR = pCfg->defcolor;
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pLayReg->CKCR = (pLayReg->CKCR & ~0x00FFFFFF) | (pCfg->keycolor & 0x00FFFFFF);
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pLayReg->CACR = (pLayReg->CACR & ~LTDC_LxCACR_CONSTA) | ((uint32_t)pCfg->alpha & LTDC_LxCACR_CONSTA);
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pLayReg->BFCR = (pLayReg->BFCR & ~(LTDC_LxBFCR_BF1 | LTDC_LxBFCR_BF2)) | ((uint32_t)pCfg->blending & (LTDC_LxBFCR_BF1 | LTDC_LxBFCR_BF2));
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for (start = 0; start < pCfg->palettelen; start++)
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pLayReg->CLUTWR = ((uint32_t)start << 24) | (pCfg->palette[start] & 0x00FFFFFF);
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// Final flags
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pLayReg->CR = (pLayReg->CR & ~LTDC_LEF_MASK) | ((uint32_t)pCfg->layerflags & LTDC_LEF_MASK);
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}
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static void _ltdc_init(void) {
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// Set up the display scanning
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uint32_t hacc, vacc;
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// Reset the LTDC peripheral
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RCC->APB2RSTR |= RCC_APB2RSTR_LTDCRST;
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RCC->APB2RSTR = 0;
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// Enable the LTDC clock
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#if !LTDC_NO_CLOCK_INIT
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#if defined(STM32F469xx)
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RCC->DCKCFGR = (RCC->DCKCFGR & ~RCC_DCKCFGR_PLLSAIDIVR);
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#elif defined(STM32F4) || defined(STM32F429_439xx) || defined(STM32F429xx)
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RCC->DCKCFGR = (RCC->DCKCFGR & ~RCC_DCKCFGR_PLLSAIDIVR) | (1 << 16);
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#elif defined(STM32F7) || defined(STM32F746xx)
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RCC->DCKCFGR1 = (RCC->DCKCFGR1 & ~RCC_DCKCFGR1_PLLSAIDIVR) | (1 << 16);
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#else
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#error STM32LTDC driver not implemented for your platform
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#endif
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#endif
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// Enable the peripheral
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RCC->APB2ENR |= RCC_APB2ENR_LTDCEN;
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// Turn off the controller and its interrupts
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LTDC->GCR = 0;
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LTDC->IER = 0;
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_ltdc_reload();
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// Set synchronization params
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hacc = driverCfg.hsync - 1;
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vacc = driverCfg.vsync - 1;
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LTDC->SSCR = ((hacc << 16) & LTDC_SSCR_HSW) | ((vacc << 0) & LTDC_SSCR_VSH);
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// Set accumulated back porch params
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hacc += driverCfg.hbackporch;
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vacc += driverCfg.vbackporch;
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LTDC->BPCR = ((hacc << 16) & LTDC_BPCR_AHBP) | ((vacc << 0) & LTDC_BPCR_AVBP);
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// Set accumulated active params
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hacc += driverCfg.width;
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vacc += driverCfg.height;
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LTDC->AWCR = ((hacc << 16) & LTDC_AWCR_AAW) | ((vacc << 0) & LTDC_AWCR_AAH);
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// Set accumulated total params
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hacc += driverCfg.hfrontporch;
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vacc += driverCfg.vfrontporch;
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LTDC->TWCR = ((hacc << 16) & LTDC_TWCR_TOTALW) | ((vacc << 0) & LTDC_TWCR_TOTALH);
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// Set signal polarities and other flags
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LTDC->GCR = driverCfg.syncflags & (LTDC_EF_MASK & ~LTDC_EF_ENABLE);
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// Set background color
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LTDC->BCCR = (LTDC->BCCR & ~0x00FFFFFF) | (driverCfg.bgcolor & 0x00FFFFFF);
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// Load the background layer
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_ltdc_layer_init(LTDC_Layer1, &driverCfg.bglayer);
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// Load the foreground layer
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_ltdc_layer_init(LTDC_Layer2, &driverCfg.fglayer);
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// Interrupt handling
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// Possible flags - LTDC_IER_RRIE, LTDC_IER_LIE, LTDC_IER_FUIE, LTDC_IER_TERRIE etc
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LTDC->IER = 0;
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// Set everything going
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_ltdc_reload();
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LTDC->GCR |= LTDC_GCR_LTDCEN;
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_ltdc_reload();
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}
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LLDSPEC bool_t gdisp_lld_init(GDisplay* g) {
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// Initialize the private structure
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g->priv = 0;
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g->board = 0;
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// Init the board
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init_board(g);
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// Initialise the LTDC controller
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_ltdc_init();
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// Initialise DMA2D
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#if LTDC_USE_DMA2D
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dma2d_init();
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#endif
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// Finish Init the board
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post_init_board(g);
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// Turn on the back-light
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set_backlight(g, GDISP_INITIAL_BACKLIGHT);
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// Initialise the GDISP structure
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g->g.Width = driverCfg.bglayer.width;
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g->g.Height = driverCfg.bglayer.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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LLDSPEC void gdisp_lld_draw_pixel(GDisplay* g) {
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unsigned pos;
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#if GDISP_NEED_CONTROL
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switch(g->g.Orientation) {
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case GDISP_ROTATE_0:
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default:
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pos = PIXIL_POS(g, g->p.x, g->p.y);
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break;
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case GDISP_ROTATE_90:
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pos = PIXIL_POS(g, g->p.y, g->g.Width-g->p.x-1);
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break;
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case GDISP_ROTATE_180:
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pos = PIXIL_POS(g, g->g.Width-g->p.x-1, g->g.Height-g->p.y-1);
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break;
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case GDISP_ROTATE_270:
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pos = PIXIL_POS(g, g->g.Height-g->p.y-1, g->p.x);
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break;
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}
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#else
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pos = PIXIL_POS(g, g->p.x, g->p.y);
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#endif
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#if LTDC_USE_DMA2D
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while(DMA2D->CR & DMA2D_CR_START);
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#endif
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PIXEL_ADDR(g, pos)[0] = gdispColor2Native(g->p.color);
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}
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LLDSPEC color_t gdisp_lld_get_pixel_color(GDisplay* g) {
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unsigned pos;
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LLDCOLOR_TYPE color;
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#if GDISP_NEED_CONTROL
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switch(g->g.Orientation) {
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case GDISP_ROTATE_0:
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default:
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pos = PIXIL_POS(g, g->p.x, g->p.y);
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break;
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case GDISP_ROTATE_90:
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pos = PIXIL_POS(g, g->p.y, g->g.Width-g->p.x-1);
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break;
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case GDISP_ROTATE_180:
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pos = PIXIL_POS(g, g->g.Width-g->p.x-1, g->g.Height-g->p.y-1);
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break;
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case GDISP_ROTATE_270:
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pos = PIXIL_POS(g, g->g.Height-g->p.y-1, g->p.x);
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break;
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}
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#else
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pos = PIXIL_POS(g, g->p.x, g->p.y);
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#endif
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#if LTDC_USE_DMA2D
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while(DMA2D->CR & DMA2D_CR_START);
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#endif
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color = PIXEL_ADDR(g, pos)[0];
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return gdispNative2Color(color);
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}
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#if GDISP_NEED_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: case powerOn: case powerSleep: case powerDeepSleep:
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// TODO
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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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case GDISP_ROTATE_0:
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case GDISP_ROTATE_180:
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if (g->g.Orientation == GDISP_ROTATE_90 || g->g.Orientation == GDISP_ROTATE_270) {
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coord_t tmp;
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tmp = g->g.Width;
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g->g.Width = g->g.Height;
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g->g.Height = tmp;
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}
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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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if (g->g.Orientation == GDISP_ROTATE_0 || g->g.Orientation == GDISP_ROTATE_180) {
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coord_t tmp;
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tmp = g->g.Width;
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g->g.Width = g->g.Height;
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g->g.Height = tmp;
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}
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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_BACKLIGHT:
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if ((unsigned)g->p.ptr > 100) g->p.ptr = (void *)100;
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set_backlight(g, (unsigned)g->p.ptr);
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g->g.Backlight = (unsigned)g->p.ptr;
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return;
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case GDISP_CONTROL_CONTRAST:
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if ((unsigned)g->p.ptr > 100) g->p.ptr = (void *)100;
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// TODO
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g->g.Contrast = (unsigned)g->p.ptr;
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return;
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}
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}
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#endif
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#if LTDC_USE_DMA2D
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static void dma2d_init(void) {
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// Enable DMA2D clock
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RCC->AHB1ENR |= RCC_AHB1ENR_DMA2DEN;
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// Output color format
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#if GDISP_LLD_PIXELFORMAT == GDISP_PIXELFORMAT_RGB565
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DMA2D->OPFCCR = OPFCCR_RGB565;
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#elif GDISP_LLD_PIXELFORMAT == GDISP_PIXELFORMAT_RGB888
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DMA2D->OPFCCR = OPFCCR_ARGB8888;
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#endif
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// Foreground color format
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#if GDISP_LLD_PIXELFORMAT == GDISP_PIXELFORMAT_RGB565
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DMA2D->FGPFCCR = FGPFCCR_CM_RGB565;
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#elif GDISP_LLD_PIXELFORMAT == GDISP_PIXELFORMAT_RGB888
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DMA2D->FGPFCCR = FGPFCCR_CM_ARGB8888;
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#endif
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}
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// Uses p.x,p.y p.cx,p.cy p.color
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LLDSPEC void gdisp_lld_fill_area(GDisplay* g)
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{
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uint32_t pos;
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uint32_t lineadd;
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uint32_t shape;
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// Wait until DMA2D is ready
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while(DMA2D->CR & DMA2D_CR_START);
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#if GDISP_NEED_CONTROL
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switch(g->g.Orientation) {
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case GDISP_ROTATE_0:
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default:
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pos = PIXIL_POS(g, g->p.x, g->p.y);
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lineadd = g->g.Width - g->p.cx;
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shape = (g->p.cx << 16) | (g->p.cy);
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break;
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case GDISP_ROTATE_90:
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pos = PIXIL_POS(g, g->p.y, g->g.Width-g->p.x-g->p.cx);
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lineadd = g->g.Height - g->p.cy;
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shape = (g->p.cy << 16) | (g->p.cx);
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break;
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case GDISP_ROTATE_180:
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pos = PIXIL_POS(g, g->g.Width-g->p.x-g->p.cx, g->g.Height-g->p.y-g->p.cy);
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lineadd = g->g.Width - g->p.cx;
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shape = (g->p.cx << 16) | (g->p.cy);
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break;
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case GDISP_ROTATE_270:
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pos = PIXIL_POS(g, g->g.Height-g->p.y-g->p.cy, g->p.x);
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lineadd = g->g.Height - g->p.cy;
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shape = (g->p.cy << 16) | (g->p.cx);
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break;
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}
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#else
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pos = PIXIL_POS(g, g->p.x, g->p.y);
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lineadd = g->g.Width - g->p.cx;
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shape = (g->p.cx << 16) | (g->p.cy);
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#endif
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// Start the DMA2D
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DMA2D->OMAR = (uint32_t)PIXEL_ADDR(g, pos);
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DMA2D->OOR = lineadd;
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DMA2D->NLR = shape;
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DMA2D->OCOLR = (uint32_t)(gdispColor2Native(g->p.color));
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DMA2D->CR = DMA2D_CR_MODE_R2M | DMA2D_CR_START;
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}
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/* Oops - the DMA2D only supports GDISP_ROTATE_0.
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*
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* Where the width is 1 we can trick it for other orientations.
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* That is worthwhile as a width of 1 is common. For other
|
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* situations we need to fall back to pixel pushing.
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|
*
|
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* Additionally, although DMA2D can translate color formats
|
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* it can only do it for a small range of formats. For any
|
|
* other formats we also need to fall back to pixel pushing.
|
|
*
|
|
* As the code to actually do all that for other than the
|
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* simplest case (orientation == GDISP_ROTATE_0 and
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* GDISP_PIXELFORMAT == GDISP_LLD_PIXELFORMAT) is very complex
|
|
* we will always pixel push for now. In practice that is OK as
|
|
* access to the framebuffer is fast - probably faster than DMA2D.
|
|
* It just uses more CPU.
|
|
*/
|
|
#if GDISP_HARDWARE_BITFILLS
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// Uses p.x,p.y p.cx,p.cy p.x1,p.y1 (=srcx,srcy) p.x2 (=srccx), p.ptr (=buffer)
|
|
LLDSPEC void gdisp_lld_blit_area(GDisplay* g) {
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// Wait until DMA2D is ready
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while(DMA2D->CR & DMA2D_CR_START);
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|
|
// Source setup
|
|
DMA2D->FGMAR = LTDC_PIXELBYTES * (g->p.y1 * g->p.x2 + g->p.x1) + (uint32_t)g->p.ptr;
|
|
DMA2D->FGOR = g->p.x2 - g->p.cx;
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|
|
|
// Output setup
|
|
DMA2D->OMAR = (uint32_t)PIXEL_ADDR(g, PIXIL_POS(g, g->p.x, g->p.y));
|
|
DMA2D->OOR = g->g.Width - g->p.cx;
|
|
DMA2D->NLR = (g->p.cx << 16) | (g->p.cy);
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|
|
|
// Set MODE to M2M and Start the process
|
|
DMA2D->CR = DMA2D_CR_MODE_M2M | DMA2D_CR_START;
|
|
}
|
|
#endif
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|
|
|
#endif /* LTDC_USE_DMA2D */
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|
|
|
#endif /* GFX_USE_GDISP */
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