/* * This file is part of the libopencm3 project. * * Copyright (C) 2014 Oliver Meier * * This library is free software: you can redistribute it and/or modify * it under the terms of the GNU Lesser General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * This library 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 Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public License * along with this library. If not, see . */ #ifndef LIBOPENCM3_STM32_F4_LTDC_H_ #define LIBOPENCM3_STM32_F4_LTDC_H_ #include #include /** * LTDC */ #define LTDC_SSCR (MMIO32(LTDC_BASE + 0x08)) #define LTDC_BPCR (MMIO32(LTDC_BASE + 0x0C)) #define LTDC_AWCR (MMIO32(LTDC_BASE + 0x10)) #define LTDC_TWCR (MMIO32(LTDC_BASE + 0x14)) #define LTDC_GCR (MMIO32(LTDC_BASE + 0x18)) #define LTDC_SRCR (MMIO32(LTDC_BASE + 0x24)) #define LTDC_BCCR (MMIO32(LTDC_BASE + 0x2C)) #define LTDC_IER (MMIO32(LTDC_BASE + 0x34)) #define LTDC_ISR (MMIO32(LTDC_BASE + 0x38)) #define LTDC_ICR (MMIO32(LTDC_BASE + 0x3C)) #define LTDC_LIPCR (MMIO32(LTDC_BASE + 0x40)) #define LTDC_CPSR (MMIO32(LTDC_BASE + 0x44)) #define LTDC_CDSR (MMIO32(LTDC_BASE + 0x48)) /* x == LTDC_LAYER_x */ #define LTDC_LxCR(x) (MMIO32(LTDC_BASE + 0x84 + 0x80 * (x - 1))) #define LTDC_LxWHPCR(x) (MMIO32(LTDC_BASE + 0x88 + 0x80 * (x - 1))) #define LTDC_LxWVPCR(x) (MMIO32(LTDC_BASE + 0x8C + 0x80 * (x - 1))) #define LTDC_LxCKCR(x) (MMIO32(LTDC_BASE + 0x90 + 0x80 * (x - 1))) #define LTDC_LxPFCR(x) (MMIO32(LTDC_BASE + 0x94 + 0x80 * (x - 1))) #define LTDC_LxCACR(x) (MMIO32(LTDC_BASE + 0x98 + 0x80 * (x - 1))) #define LTDC_LxDCCR(x) (MMIO32(LTDC_BASE + 0x9C + 0x80 * (x - 1))) #define LTDC_LxBFCR(x) (MMIO32(LTDC_BASE + 0xA0 + 0x80 * (x - 1))) #define LTDC_LxCFBAR(x) (MMIO32(LTDC_BASE + 0xAC + 0x80 * (x - 1))) #define LTDC_LxCFBLR(x) (MMIO32(LTDC_BASE + 0xB0 + 0x80 * (x - 1))) #define LTDC_LxCFBLNR(x) (MMIO32(LTDC_BASE + 0xB4 + 0x80 * (x - 1))) #define LTDC_LxCLUTWR(x) (MMIO32(LTDC_BASE + 0xC4 + 0x80 * (x - 1))) #define LTDC_LAYER_1 1 #define LTDC_LAYER_2 2 /* GCR - control register */ #define LTDC_GCR_LTDC_ENABLE (1<<0) #define LTDC_GCR_DITHER_ENABLE (1<<16) #define LTDC_GCR_PCPOL_ACTIVE_LOW (0<<28) #define LTDC_GCR_PCPOL_ACTIVE_HIGH (1<<28) #define LTDC_GCR_DEPOL_ACTIVE_LOW (0<<29) #define LTDC_GCR_DEPOL_ACTIVE_HIGH (1<<29) #define LTDC_GCR_VSPOL_ACTIVE_LOW (0<<30) #define LTDC_GCR_VSPOL_ACTIVE_HIGH (1<<30) #define LTDC_GCR_HSPOL_ACTIVE_LOW (0<<31) #define LTDC_GCR_HSPOL_ACTIVE_HIGH (1<<31) /* LTDC_BCCR - reload control */ #define LTDC_SRCR_RELOAD_IMR (1<<0) #define LTDC_SRCR_RELOAD_VBR (1<<1) /* LTDC_CDSR - display status register */ #define LTDC_CDSR_VDES (1<<0) #define LTDC_CDSR_HDES (1<<1) #define LTDC_CDSR_VSYNCS (1<<2) #define LTDC_CDSR_HSYNCS (1<<3) /* LTDC_LxCR - layer control */ #define LTDC_LxCR_LAYER_ENABLE (1<<0) #define LTDC_LxCR_COLKEY_ENABLE (1<<1) #define LTDC_LxCR_COLTAB_ENABLE (1<<4) /* LTDC_LxPFCR - Pixel formats */ #define LTDC_LxPFCR_ARGB8888 (0b000) #define LTDC_LxPFCR_RGB888 (0b001) #define LTDC_LxPFCR_RGB565 (0b010) #define LTDC_LxPFCR_ARGB1555 (0b011) #define LTDC_LxPFCR_ARGB4444 (0b100) #define LTDC_LxPFCR_L8 (0b101) #define LTDC_LxPFCR_AL44 (0b110) #define LTDC_LxPFCR_AL88 (0b111) /* LTDC_LxBFCR - Blending factors - BF1 */ #define LTDC_LxBFCR_BF1_CONST_ALPHA (0b100) #define LTDC_LxBFCR_BF1_PIXEL_ALPHA_x_CONST_ALPHA (0b110) /* LTDC_LxBFCR - Blending factors - BF2 */ #define LTDC_LxBFCR_BF2_CONST_ALPHA (0b101) #define LTDC_LxBFCR_BF2_PIXEL_ALPHA_x_CONST_ALPHA (0b111) /** * simple helper macros */ /* global */ static inline void ltdc_ctrl_enable(uint32_t ctrl_flags) { LTDC_GCR |= ctrl_flags; } static inline void ltdc_ctrl_disable(uint32_t ctrl_flags) { LTDC_GCR &= ~(ctrl_flags); } static inline void ltdc_reload(uint32_t reload_flags) { LTDC_SRCR = reload_flags; } static inline void ltdc_set_background_color(uint8_t r, uint8_t g, uint8_t b) { LTDC_BCCR = (((r)&255)<<16) | (((g)&255)<<8) | (((b)&255)<<0); } static inline void ltdc_get_current_position(uint16_t *x, uint16_t *y) { uint32_t tmp = LTDC_CPSR; *x = tmp >> 16; *y = tmp &= 0xFFFF; } static inline uint16_t ltdc_get_current_position_x(void) { return LTDC_CPSR >> 16; } static inline uint16_t ltdc_get_current_position_y(void) { return LTDC_CPSR & 0xffff; } static inline uint32_t ltdc_get_display_status(uint32_t status_flags) { return LTDC_CDSR & status_flags; } /* layers */ static inline void ltdc_layer_ctrl_enable(uint32_t layer, uint32_t ctrl_flags) { LTDC_LxCR(layer) |= ctrl_flags; } static inline void ltdc_layer_ctrl_disable(uint32_t layer, uint32_t ctrl_flags) { LTDC_LxCR(layer) &= ~(ctrl_flags); } static inline void ltdc_set_color_key(uint32_t layer, uint8_t r, uint8_t g, uint8_t b) { LTDC_LxCKCR(layer) = ((((r)&255)<<16) | (((g)&255)<<8) | (((b)&255)<<0)); } static inline void ltdc_set_pixel_format(uint32_t layer, uint32_t format) { LTDC_LxPFCR(layer) = format; } static inline void ltdc_set_constant_alpha(uint32_t layer, uint8_t alpha) { LTDC_LxCACR(layer) = ((alpha)&255); } static inline void ltdc_set_default_colors(uint32_t layer, uint8_t a, uint8_t r, uint8_t g, uint8_t b) { LTDC_LxDCCR(layer) = ((((a)&255)<<24) | (((r)&255)<<16) | (((g)&255)<<8) | (((b)&255)<<0)); } static inline void ltdc_set_blending_factors(uint32_t layer, uint8_t bf1, uint8_t bf2) { LTDC_LxBFCR(layer) = ((bf1)<<8) | ((bf2)<<0); } static inline void ltdc_set_fbuffer_address(uint32_t layer, uint32_t address) { LTDC_LxCFBAR(layer) = (uint32_t)address; } static inline void ltdc_set_fb_line_length(uint32_t layer, uint16_t len, uint16_t pitch) { LTDC_LxCFBLR(layer) = ((((pitch)&0x1FFF)<<16) | (((len)&0x1FFF)<<0)); } static inline void ltdc_set_fb_line_count(uint32_t layer, uint16_t linecount) { LTDC_LxCFBLNR(layer) = (((linecount)&0x3FF)<<0); } /** * more complicated helper functions */ void ltdc_set_tft_sync_timings( uint16_t sync_width, uint16_t sync_height, uint16_t h_back_porch, uint16_t v_back_porch, uint16_t active_width, uint16_t active_height, uint16_t h_front_porch, uint16_t v_front_porch ); void ltdc_setup_windowing( uint8_t layer_number, uint16_t h_back_porch, uint16_t v_back_porch, uint16_t active_width, uint16_t active_height ); /** * Helper function to wait for SRCR reload to complete or so */ static inline bool LTDC_SRCR_IS_RELOADING(void) { return (LTDC_SRCR & (LTDC_SRCR_RELOAD_VBR | LTDC_SRCR_RELOAD_IMR)) != 0; } /** * color conversion helper function * (simulate the ltdc color conversion) */ static inline uint16_t ltdc_get_rgb888_from_rgb565(uint16_t rgb888) { return ((((rgb888) & 0xF800) >> (11-8))/31)<<16 | ((((rgb888) & 0x07E0) << (8-5))/63)<<8 | ((((rgb888) & 0x001F) << (8-0))/31)<<0; } #endif /* LIBOPENCM3_STM32_F4_LTDC_H_ */