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zephyr
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boards: arm: stm32h750b_dk: add support for display 

ltdc devicetree definition & external SDRAM selection
for the display buffer

Signed-off-by: Philippe Cornu <philippe.cornu@foss.st.com>
Signed-off-by: Toon Stegen <toon@toostsolutions.be>
Signed-off-by: Abderrahmane Jarmouni <abderrahmane.jarmouni-ext@st.com>
This commit is contained in:
Philippe Cornu 2024-05-21 22:14:47 +02:00 committed by Anas Nashif
parent 971227180b
commit 6e56de34fb
2 changed files with 73 additions and 6 deletions
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17
boards/st/stm32h750b_dk/Kconfig.defconfig Normal file
View File

@ -0,0 +1,17 @@
# STM32H750B DISCOVERY board configuration
# Copyright (c) 2024 STMicroelectronics
# SPDX-License-Identifier: Apache-2.0
if BOARD_STM32H750B_DK
if DISPLAY
# MEMC needs to be enabled in order to store
# display buffer to external SDRAM connected to FMC
config MEMC
default y
endif # DISPLAY
endif # BOARD_STM32H750B_DK

62
boards/st/stm32h750b_dk/stm32h750b_dk.dts
View File

@ -19,6 +19,7 @@
zephyr,sram = &sram0;
zephyr,flash = &flash0;
zephyr,flash-controller = &mt25ql512ab1;
zephyr,display = &ltdc;
};
sdram2: sdram@d0000000 {
@ -75,6 +76,45 @@
status = "okay";
};
&ltdc {
pinctrl-0 = <&ltdc_r0_pi15 &ltdc_r1_pj0 &ltdc_r2_pj1 &ltdc_r3_ph9
&ltdc_r4_pj3 &ltdc_r5_pj4 &ltdc_r6_pj5 &ltdc_r7_pj6
&ltdc_g0_pj7 &ltdc_g1_pj8 &ltdc_g2_pj9 &ltdc_g3_pj10
&ltdc_g4_pj11 &ltdc_g5_pi0 &ltdc_g6_pi1 &ltdc_g7_pk2
&ltdc_b0_pj12 &ltdc_b1_pj13 &ltdc_b2_pj14 &ltdc_b3_pj15
&ltdc_b4_pk3 &ltdc_b5_pk4 &ltdc_b6_pk5 &ltdc_b7_pk6
&ltdc_de_pk7 &ltdc_clk_pi14 &ltdc_hsync_pi12 &ltdc_vsync_pi9>;
pinctrl-names = "default";
disp-on-gpios = <&gpiod 7 GPIO_ACTIVE_HIGH>;
ext-sdram = <&sdram2>;
status = "okay";
clocks = <&rcc STM32_CLOCK_BUS_APB3 0x00000008>,
<&rcc STM32_SRC_PLL3_R NO_SEL>;
width = <480>;
height = <272>;
pixel-format = <PANEL_PIXEL_FORMAT_RGB_565>;
display-timings {
compatible = "zephyr,panel-timing";
de-active = <1>;
pixelclk-active = <0>;
hsync-active = <0>;
vsync-active = <0>;
hsync-len = <1>;
vsync-len = <10>;
hback-porch = <43>;
vback-porch = <12>;
hfront-porch = <8>;
vfront-porch = <4>;
};
def-back-color-red = <0xFF>;
def-back-color-green = <0xFF>;
def-back-color-blue = <0xFF>;
};
&pll {
div-m = <5>;
mul-n = <192>;
@ -85,6 +125,16 @@
status = "okay";
};
&pll3 {
div-m = <5>;
mul-n = <192>;
div-p = <2>;
div-q = <20>;
div-r = <99>;
clocks = <&clk_hse>;
status = "okay";
};
&rcc {
clocks = <&pll>;
clock-frequency = <DT_FREQ_M(480)>;
@ -121,13 +171,13 @@
status = "okay";
partitions {
compatible = "fixed-partitions";
#address-cells = <1>;
#size-cells = <1>;
compatible = "fixed-partitions";
#address-cells = <1>;
#size-cells = <1>;
partition@0 {
reg = <0x0 DT_SIZE_M(64)>;
};
partition@0 {
reg = <0x0 DT_SIZE_M(64)>;
};
};
};