lvgl: Add support for FSMC as 16 bit interface

STM32 FSMC peripheral (for accessing external memories)
is used to write to LCD with 8080 II 16 bit interface.
It allows for maximum performance when LCD is connected
to dedicated pins.

Signed-off-by: Jerzy Kasenberg <jerzy.kasenberg@codecoup.pl>

hw/drivers/display/lcd_itf/itf_8080_stm32_fsmc/pkg.yml

@@ -0,0 +1,28 @@
+#
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#  http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+#
+
+pkg.name: hw/drivers/display/lcd_itf/itf_8080_stm32_fsmc
+pkg.description: LCD Standard 8080 parallel interface handled by fsmc
+pkg.keywords:
+    - display
+
+pkg.apis:
+    - lcd_interface
+
+pkg.deps:

hw/drivers/display/lcd_itf/itf_8080_stm32_fsmc/src/itf_8080_stm32_fsmc.c

@@ -0,0 +1,109 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *  http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+#include <bsp/bsp.h>
+#include <hal/hal_gpio.h>
+#include <mcu/stm32_hal.h>
+#include <mcu/mcu.h>
+
+#include <hal/lv_hal_indev.h>
+#include <lcd_itf.h>
+
+static inline void
+lcd_itf_8080_write_word(uint16_t w)
+{
+    *(uint16_t *)(0x60000000) = w;
+}
+
+#define LCD_ITF_8080_WRITE_BYTE(n) lcd_itf_8080_write_word(n)
+#define LCD_ITF_8080_WRITE_WORD(n) lcd_itf_8080_write_word(n)
+
+void
+lcd_itf_write_bytes(const uint8_t *bytes, size_t size)
+{
+    for (size_t i = 0; i < size; ++i) {
+        LCD_ITF_8080_WRITE_BYTE(*bytes++);
+    }
+}
+
+void
+lcd_itf_write_color_data(uint16_t x1, uint16_t x2, uint16_t y1, uint16_t y2, void *pixels)
+{
+    const uint16_t *data = (const uint16_t *)pixels;
+    size_t size = (x2 - x1 + 1) * (y2 - y1 + 1) * 2;
+
+    LCD_DC_PIN_DATA();
+    LCD_CS_PIN_ACTIVE();
+    if (LV_COLOR_16_SWAP == 0) {
+        for (size_t i = 0; i < size; i += 2, data++) {
+            LCD_ITF_8080_WRITE_WORD(*data);
+        }
+    } else {
+        lcd_itf_write_bytes((const uint8_t *)pixels, size);
+    }
+    LCD_CS_PIN_INACTIVE();
+}
+
+void
+lcd_ift_write_cmd(const uint8_t *cmd, int cmd_length)
+{
+    LCD_DC_PIN_COMMAND();
+    LCD_CS_PIN_ACTIVE();
+    LCD_ITF_8080_WRITE_BYTE(*cmd);
+    if (cmd_length > 1) {
+        LCD_DC_PIN_DATA();
+        lcd_itf_write_bytes(cmd + 1, cmd_length - 1);
+    }
+    LCD_CS_PIN_INACTIVE();
+}
+
+void
+lcd_itf_init(void)
+{
+    hal_gpio_init_out(MYNEWT_VAL(LCD_DC_PIN), 0);
+    if (MYNEWT_VAL(LCD_CS_PIN) >= 0) {
+        hal_gpio_init_out(MYNEWT_VAL(LCD_CS_PIN), 1);
+    }
+    if (MYNEWT_VAL(LCD_RESET_PIN) >= 0) {
+        hal_gpio_init_out(MYNEWT_VAL(LCD_RESET_PIN), 1);
+    }
+    hal_gpio_init_af(STM32_FSMC_NWE, GPIO_AF12_FSMC, HAL_GPIO_PULL_NONE, 0);
+    hal_gpio_init_af(STM32_FSMC_NOE, GPIO_AF12_FSMC, HAL_GPIO_PULL_NONE, 0);
+    hal_gpio_init_af(STM32_FSMC_D0, GPIO_AF12_FSMC, HAL_GPIO_PULL_NONE, 0);
+    hal_gpio_init_af(STM32_FSMC_D1, GPIO_AF12_FSMC, HAL_GPIO_PULL_NONE, 0);
+    hal_gpio_init_af(STM32_FSMC_D2, GPIO_AF12_FSMC, HAL_GPIO_PULL_NONE, 0);
+    hal_gpio_init_af(STM32_FSMC_D3, GPIO_AF12_FSMC, HAL_GPIO_PULL_NONE, 0);
+    hal_gpio_init_af(STM32_FSMC_D4, GPIO_AF12_FSMC, HAL_GPIO_PULL_NONE, 0);
+    hal_gpio_init_af(STM32_FSMC_D5, GPIO_AF12_FSMC, HAL_GPIO_PULL_NONE, 0);
+    hal_gpio_init_af(STM32_FSMC_D6, GPIO_AF12_FSMC, HAL_GPIO_PULL_NONE, 0);
+    hal_gpio_init_af(STM32_FSMC_D7, GPIO_AF12_FSMC, HAL_GPIO_PULL_NONE, 0);
+    hal_gpio_init_af(STM32_FSMC_D8, GPIO_AF12_FSMC, HAL_GPIO_PULL_NONE, 0);
+    hal_gpio_init_af(STM32_FSMC_D9, GPIO_AF12_FSMC, HAL_GPIO_PULL_NONE, 0);
+    hal_gpio_init_af(STM32_FSMC_D10, GPIO_AF12_FSMC, HAL_GPIO_PULL_NONE, 0);
+    hal_gpio_init_af(STM32_FSMC_D11, GPIO_AF12_FSMC, HAL_GPIO_PULL_NONE, 0);
+    hal_gpio_init_af(STM32_FSMC_D12, GPIO_AF12_FSMC, HAL_GPIO_PULL_NONE, 0);
+    hal_gpio_init_af(STM32_FSMC_D13, GPIO_AF12_FSMC, HAL_GPIO_PULL_NONE, 0);
+    hal_gpio_init_af(STM32_FSMC_D14, GPIO_AF12_FSMC, HAL_GPIO_PULL_NONE, 0);
+    hal_gpio_init_af(STM32_FSMC_D15, GPIO_AF12_FSMC, HAL_GPIO_PULL_NONE, 0);
+
+    __HAL_RCC_FSMC_CLK_ENABLE();
+    FSMC_Bank1->BTCR[0] = FSMC_BCR1_WREN_Msk | (1 << FSMC_BCR1_MWID_Pos) |
+                          (0 << FSMC_BCR1_MTYP_Pos) | FSMC_BCR1_MBKEN_Msk;
+    FSMC_Bank1->BTCR[1] = 0x00100200;
+}

hw/drivers/display/lcd_itf/pkg.yml

@@ -32,4 +32,6 @@ pkg.deps.'LCD_ITF == "8080_II_8_bit"':
     - "@apache-mynewt-core/hw/drivers/display/lcd_itf/itf_8080"
 pkg.deps.'LCD_ITF == "8080_II_16_bit"':
     - "@apache-mynewt-core/hw/drivers/display/lcd_itf/itf_8080"
+pkg.deps.'LCD_ITF == "8080_II_16_bit_stm32_fsmc"':
+    - "@apache-mynewt-core/hw/drivers/display/lcd_itf/itf_8080_stm32_fsmc"
 

hw/drivers/display/lcd_itf/syscfg.yml

@@ -25,6 +25,7 @@ syscfg.defs:
             - spi
             - 8080_II_8_bit
             - 8080_II_16_bit
+            - 8080_II_16_bit_stm32_fsmc
         value: spi
     LCD_CS_PIN:
         description: LCD chip select pin for SPI.

hw/mcu/stm/stm32f4xx/include/mcu/mcu.h

@@ -47,6 +47,30 @@ extern "C" {
 #define STM32_SYSTEM_MEMORY     0x1FF00000
 #endif
 
+/* FSMC pins are dedicated */
+#define STM32_FSMC_NE1  MCU_GPIO_PORTD(7)
+#define STM32_FSMC_NE2  MCU_GPIO_PORTG(9)
+#define STM32_FSMC_NE3  MCU_GPIO_PORTG(10)
+#define STM32_FSMC_NE4  MCU_GPIO_PORTG(12)
+#define STM32_FSMC_NOE  MCU_GPIO_PORTD(4)
+#define STM32_FSMC_NWE  MCU_GPIO_PORTD(5)
+#define STM32_FSMC_D0   MCU_GPIO_PORTD(14)
+#define STM32_FSMC_D1   MCU_GPIO_PORTD(15)
+#define STM32_FSMC_D2   MCU_GPIO_PORTD(0)
+#define STM32_FSMC_D3   MCU_GPIO_PORTD(1)
+#define STM32_FSMC_D4   MCU_GPIO_PORTE(7)
+#define STM32_FSMC_D5   MCU_GPIO_PORTE(8)
+#define STM32_FSMC_D6   MCU_GPIO_PORTE(9)
+#define STM32_FSMC_D7   MCU_GPIO_PORTE(10)
+#define STM32_FSMC_D8   MCU_GPIO_PORTE(11)
+#define STM32_FSMC_D9   MCU_GPIO_PORTE(12)
+#define STM32_FSMC_D10  MCU_GPIO_PORTE(13)
+#define STM32_FSMC_D11  MCU_GPIO_PORTE(14)
+#define STM32_FSMC_D12  MCU_GPIO_PORTE(15)
+#define STM32_FSMC_D13  MCU_GPIO_PORTD(8)
+#define STM32_FSMC_D14  MCU_GPIO_PORTD(9)
+#define STM32_FSMC_D15  MCU_GPIO_PORTD(10)
+
 #ifdef __cplusplus
 }
 #endif