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/*
* This file is subject to the terms of the GFX License. If a copy of
* the license was not distributed with this file, you can obtain one at:
*
* http://ugfx.org/license.html
*/
#ifndef _GDISP_LLD_BOARD_H
#define _GDISP_LLD_BOARD_H
#include "stm32f7xx_ll_fmc.h"
#include "stm32f746g_discovery_sdram.h"
#include <string.h>
static const ltdcConfig driverCfg = {
480, 272, // Width, Height (pixels)
41, 10, // Horizontal, Vertical sync (pixels)
13, 2, // Horizontal, Vertical back porch (pixels)
32, 2, // Horizontal, Vertical front porch (pixels)
0, // Sync flags
0x000000, // Clear color (RGB888)
{ // Background layer config
(LLDCOLOR_TYPE *)SDRAM_DEVICE_ADDR, // Frame buffer address
480, 272, // Width, Height (pixels)
480 * LTDC_PIXELBYTES, // Line pitch (bytes)
LTDC_PIXELFORMAT, // Pixel format
0, 0, // Start pixel position (x, y)
480, 272, // Size of virtual layer (cx, cy)
LTDC_COLOR_FUCHSIA, // Default color (ARGB8888)
0x980088, // Color key (RGB888)
LTDC_BLEND_FIX1_FIX2, // Blending factors
0, // Palette (RGB888, can be NULL)
0, // Palette length
0xFF, // Constant alpha factor
LTDC_LEF_ENABLE // Layer configuration flags
},
LTDC_UNUSED_LAYER_CONFIG // Foreground layer config
};
/**
* @brief LCD special pins
*/
/* Display enable pin */
#define LCD_DISP_PIN GPIO_PIN_12
#define LCD_DISP_GPIO_PORT GPIOI
/* Backlight control pin */
#define LCD_BL_CTRL_PIN GPIO_PIN_3
#define LCD_BL_CTRL_GPIO_PORT GPIOK
/* Display timing */
#define RK043FN48H_FREQUENCY_DIVIDER 5
static void SetBoardPinDirectionsForLCD(void)
{
GPIO_InitTypeDef gpio_init_structure;
// Enable GPIOs clock */
__HAL_RCC_GPIOE_CLK_ENABLE();
__HAL_RCC_GPIOG_CLK_ENABLE();
__HAL_RCC_GPIOI_CLK_ENABLE(); // Display pin
__HAL_RCC_GPIOJ_CLK_ENABLE();
__HAL_RCC_GPIOK_CLK_ENABLE(); // BL pin
//*** LTDC Pins configuration
// GPIOE configuration
gpio_init_structure.Pin = GPIO_PIN_4;
gpio_init_structure.Mode = GPIO_MODE_AF_PP;
gpio_init_structure.Pull = GPIO_NOPULL;
gpio_init_structure.Speed = GPIO_SPEED_FAST;
gpio_init_structure.Alternate = GPIO_AF14_LTDC;
HAL_GPIO_Init(GPIOE, &gpio_init_structure);
// GPIOG configuration
gpio_init_structure.Pin = GPIO_PIN_12;
gpio_init_structure.Mode = GPIO_MODE_AF_PP;
gpio_init_structure.Alternate = GPIO_AF9_LTDC;
HAL_GPIO_Init(GPIOG, &gpio_init_structure);
// GPIOI LTDC alternate configuration
gpio_init_structure.Pin = GPIO_PIN_8 | GPIO_PIN_9 | GPIO_PIN_10 | \
GPIO_PIN_13 | GPIO_PIN_14 | GPIO_PIN_15;
gpio_init_structure.Mode = GPIO_MODE_AF_PP;
gpio_init_structure.Alternate = GPIO_AF14_LTDC;
HAL_GPIO_Init(GPIOI, &gpio_init_structure);
// GPIOJ configuration
gpio_init_structure.Pin = GPIO_PIN_0 | GPIO_PIN_1 | GPIO_PIN_2 | GPIO_PIN_3 | \
GPIO_PIN_4 | GPIO_PIN_5 | GPIO_PIN_6 | GPIO_PIN_7 | \
GPIO_PIN_8 | GPIO_PIN_9 | GPIO_PIN_10 | GPIO_PIN_11 | \
GPIO_PIN_13 | GPIO_PIN_14 | GPIO_PIN_15;
gpio_init_structure.Mode = GPIO_MODE_AF_PP;
gpio_init_structure.Alternate = GPIO_AF14_LTDC;
HAL_GPIO_Init(GPIOJ, &gpio_init_structure);
// GPIOK configuration
gpio_init_structure.Pin = GPIO_PIN_0 | GPIO_PIN_1 | GPIO_PIN_2 | GPIO_PIN_4 | \
GPIO_PIN_5 | GPIO_PIN_6 | GPIO_PIN_7;
gpio_init_structure.Mode = GPIO_MODE_AF_PP;
gpio_init_structure.Alternate = GPIO_AF14_LTDC;
HAL_GPIO_Init(GPIOK, &gpio_init_structure);
// LCD_DISP GPIO configuration
gpio_init_structure.Pin = LCD_DISP_PIN; /* LCD_DISP pin has to be manually controlled */
gpio_init_structure.Mode = GPIO_MODE_OUTPUT_PP;
HAL_GPIO_Init(LCD_DISP_GPIO_PORT, &gpio_init_structure);
// LCD_BL_CTRL GPIO configuration
gpio_init_structure.Pin = LCD_BL_CTRL_PIN; /* LCD_BL_CTRL pin has to be manually controlled */
gpio_init_structure.Mode = GPIO_MODE_OUTPUT_PP;
HAL_GPIO_Init(LCD_BL_CTRL_GPIO_PORT, &gpio_init_structure);
}
static inline void init_board(GDisplay *g) {
// As we are not using multiple displays we set g->board to NULL as we don't use it.
g->board = 0;
switch(g->controllerdisplay) {
case 0:
// Set pin directions
SetBoardPinDirectionsForLCD();
// Enable the display and turn on the backlight
HAL_GPIO_WritePin(LCD_DISP_GPIO_PORT, LCD_DISP_PIN, GPIO_PIN_SET);
HAL_GPIO_WritePin(LCD_BL_CTRL_GPIO_PORT, LCD_BL_CTRL_PIN, GPIO_PIN_SET);
#define STM32_SAISRC_NOCLOCK (0 << 23) /**< No clock. */
#define STM32_SAISRC_PLL (1 << 23) /**< SAI_CKIN is PLL. */
#define STM32_SAIR_DIV2 (0 << 16) /**< R divided by 2. */
#define STM32_SAIR_DIV4 (1 << 16) /**< R divided by 4. */
#define STM32_SAIR_DIV8 (2 << 16) /**< R divided by 8. */
#define STM32_SAIR_DIV16 (3 << 16) /**< R divided by 16. */
// RK043FN48H LCD clock configuration
// PLLSAI_VCO Input = HSE_VALUE/PLL_M = 1 Mhz
// PLLSAI_VCO Output = PLLSAI_VCO Input * PLLSAIN = 192 Mhz
// PLLLCDCLK = PLLSAI_VCO Output/PLLSAIR = 192/5 = 38.4 Mhz
// LTDC clock frequency = PLLLCDCLK / LTDC_PLLSAI_DIVR_4 = 38.4/4 = 9.6Mhz
#define STM32_PLLSAIN_VALUE 192
#define STM32_PLLSAIQ_VALUE 7
#define STM32_PLLSAIR_VALUE RK043FN48H_FREQUENCY_DIVIDER
#define STM32_PLLSAIR_POST STM32_SAIR_DIV4
RCC->PLLSAICFGR = (STM32_PLLSAIN_VALUE << 6) | (STM32_PLLSAIR_VALUE << 28) | (STM32_PLLSAIQ_VALUE << 24);
RCC->DCKCFGR1 = (RCC->DCKCFGR1 & ~RCC_DCKCFGR1_PLLSAIDIVR) | STM32_PLLSAIR_POST;
RCC->CR |= RCC_CR_PLLSAION;
// Initialise the SDRAM
BSP_SDRAM_Init();
// Clear the SDRAM
//memset((void *)SDRAM_BANK_ADDR, 0, 0x400000);
break;
}
}
static inline void post_init_board(GDisplay *g) {
(void) g;
}
static inline void set_backlight(GDisplay *g, uint8_t percent) {
(void) g;
(void) percent;
}
#endif /* _GDISP_LLD_BOARD_H */
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