Posted on January 25, 2016 at 06:21Hi ,
I have configured LTDC pins as follows.
/* Enable the LTDC and DMA2D clocks */
__LTDC_CLK_ENABLE();
__DMA2D_CLK_ENABLE();
/* Enable GPIOs clock */
LTDC_GPIO_CLK_EN;
/*** LTDC Pins configuration ***/
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;
GPIO_Init_Structure.Pin = LCD_DATA_PINS_1;
HAL_GPIO_Init(LCD_DATA_PORT_1, &GPIO_Init_Structure);
GPIO_Init_Structure.Pin = LCD_DATA_PINS_2;
HAL_GPIO_Init(LCD_DATA_PORT_2, &GPIO_Init_Structure);
GPIO_Init_Structure.Pin = LCD_DATA_PINS_3;
HAL_GPIO_Init(LCD_DATA_PORT_3, &GPIO_Init_Structure);
GPIO_Init_Structure.Pin = LCD_DATA_PINS_4;
HAL_GPIO_Init(LCD_DATA_PORT_4, &GPIO_Init_Structure);
GPIO_Init_Structure.Pin = LCD_DATA_PINS_5;
HAL_GPIO_Init(LCD_DATA_PORT_5, &GPIO_Init_Structure);
GPIO_Init_Structure.Pin = LCD_HSYNC_PIN;
HAL_GPIO_Init(LCD_HSYNC_PORT, &GPIO_Init_Structure);
GPIO_Init_Structure.Pin = LCD_VSYNC_PIN;
HAL_GPIO_Init(LCD_VSYNC_PORT, &GPIO_Init_Structure);
GPIO_Init_Structure.Pin = LCD_MODE_PIN;
HAL_GPIO_Init(LCD_MODE_PORT, &GPIO_Init_Structure);
GPIO_Init_Structure.Pin = LCD_CLK_PIN;
HAL_GPIO_Init(LCD_CLK_PORT, &GPIO_Init_Structure);
But I found that in one of the pins, data is not coming properly when I checked in oscilloscope.
(LCD_DATA_PINS_4)
&sharpdefine LCD_DATA_PORT_4 GPIOB
&sharpdefine LCD_DATA_PINS_4 GPIO_PIN_1
I tried to configure the same pins are GPIO and was able to change the pin conditions through debugger.
Why is this problem happening?
Is this because of the way I configured LTDC?
Data signal is active in all the other pins .
Connections are tested for continuity.
#stm32f429-ltdc-2-layer-lcd-tft
