From f3de0f6c5376c345d555a65092d832dda45866f4 Mon Sep 17 00:00:00 2001
From: Tanguy Pruvot <tpruvot@users.noreply.github.com>
Date: Mon, 28 Sep 2020 04:28:48 +0200
Subject: [PATCH] Working LCD_USE_DMA_FSMC (#19522)
---
Marlin/src/HAL/STM32F1/tft/tft_fsmc.cpp | 10 ++++++++++
Marlin/src/pins/stm32f1/pins_LONGER3D_LK.h | 2 +-
2 files changed, 11 insertions(+), 1 deletion(-)
diff --git a/Marlin/src/HAL/STM32F1/tft/tft_fsmc.cpp b/Marlin/src/HAL/STM32F1/tft/tft_fsmc.cpp
index 069be7ad54..008301d9bc 100644
--- a/Marlin/src/HAL/STM32F1/tft/tft_fsmc.cpp
+++ b/Marlin/src/HAL/STM32F1/tft/tft_fsmc.cpp
@@ -89,6 +89,16 @@ void TFT_FSMC::Init() {
uint8_t cs = FSMC_CS_PIN, rs = FSMC_RS_PIN;
uint32_t controllerAddress;
+ #if PIN_EXISTS(TFT_BACKLIGHT)
+ OUT_WRITE(TFT_BACKLIGHT_PIN, DISABLED(DELAYED_BACKLIGHT_INIT));
+ #endif
+
+ #if ENABLED(LCD_USE_DMA_FSMC)
+ dma_init(FSMC_DMA_DEV);
+ dma_disable(FSMC_DMA_DEV, FSMC_DMA_CHANNEL);
+ dma_set_priority(FSMC_DMA_DEV, FSMC_DMA_CHANNEL, DMA_PRIORITY_MEDIUM);
+ #endif
+
#if PIN_EXISTS(TFT_RESET)
OUT_WRITE(TFT_RESET_PIN, HIGH);
delay(100);
diff --git a/Marlin/src/pins/stm32f1/pins_LONGER3D_LK.h b/Marlin/src/pins/stm32f1/pins_LONGER3D_LK.h
index 799477ac10..47d7118b53 100644
--- a/Marlin/src/pins/stm32f1/pins_LONGER3D_LK.h
+++ b/Marlin/src/pins/stm32f1/pins_LONGER3D_LK.h
@@ -124,7 +124,7 @@
#define FSMC_CS_PIN PD7 // pin 88 = FSMC_NE1
#define FSMC_RS_PIN PD11 // pin 58 A16 Register. Only one address needed
-//#define LCD_USE_DMA_FSMC // Use DMA transfers to send data to the TFT (broken)
+#define LCD_USE_DMA_FSMC // Use DMA transfers to send data to the TFT
#define FSMC_DMA_DEV DMA2
#define FSMC_DMA_CHANNEL DMA_CH5