stm32/boards/NUCLEO_F756ZG: Add board definition for NUCLEO-F756ZG.

Signed-off-by: Damien George <damien@micropython.org>

ports/stm32/adc.c

@@ -154,8 +154,8 @@
 #define VBAT_DIV (4)
 #elif defined(STM32F722xx) || defined(STM32F723xx) || \
     defined(STM32F732xx) || defined(STM32F733xx) || \
-    defined(STM32F745xx) || \
-    defined(STM32F746xx) || defined(STM32F765xx) || \
+    defined(STM32F745xx) || defined(STM32F746xx) || \
+    defined(STM32F756xx) || defined(STM32F765xx) || \
     defined(STM32F767xx) || defined(STM32F769xx)
 #define VBAT_DIV (4)
 #elif defined(STM32G0) || defined(STM32G4)

ports/stm32/boards/NUCLEO_F756ZG/board.json

@@ -0,0 +1,15 @@
+{
+    "deploy": [
+        "../deploy.md"
+    ],
+    "docs": "",
+    "features": [],
+    "images": [
+        "nucleo_f756zg.jpg"
+    ],
+    "mcu": "stm32f7",
+    "product": "Nucleo F756ZG",
+    "thumbnail": "",
+    "url": "",
+    "vendor": "ST Microelectronics"
+}

ports/stm32/boards/NUCLEO_F756ZG/mpconfigboard.h

@@ -0,0 +1,88 @@
+// This board is only confirmed to operate using DFU mode and openocd.
+// DFU mode can be accessed by setting BOOT0 (see schematics)
+// To use openocd run "OPENOCD_CONFIG=boards/openocd_stm32f7.cfg" in
+// the make command.
+
+#define MICROPY_HW_BOARD_NAME       "NUCLEO-F756ZG"
+#define MICROPY_HW_MCU_NAME         "STM32F756"
+
+#define MICROPY_HW_HAS_SWITCH       (1)
+#define MICROPY_HW_HAS_FLASH        (1)
+#define MICROPY_HW_ENABLE_RNG       (1)
+#define MICROPY_HW_ENABLE_RTC       (1)
+#define MICROPY_HW_ENABLE_DAC       (1)
+#define MICROPY_HW_ENABLE_USB       (1)
+
+// HSE is 8MHz
+// VCOClock = HSE * PLLN / PLLM = 8 MHz * 216 / 4 = 432 MHz
+// SYSCLK = VCOClock / PLLP = 432 MHz / 2 = 216 MHz
+// USB/SDMMC/RNG Clock = VCOClock / PLLQ = 432 MHz / 9 = 48 MHz
+#define MICROPY_HW_CLK_PLLM (4)
+#define MICROPY_HW_CLK_PLLN (216)
+#define MICROPY_HW_CLK_PLLP (RCC_PLLP_DIV2)
+#define MICROPY_HW_CLK_PLLQ (9)
+
+// From the reference manual, for 2.7V to 3.6V
+// 151-180 MHz => 5 wait states
+// 181-210 MHz => 6 wait states
+// 211-216 MHz => 7 wait states
+#define MICROPY_HW_FLASH_LATENCY    FLASH_LATENCY_7 // 210-216 MHz needs 7 wait states
+
+// UART config
+#define MICROPY_HW_UART2_TX         (pin_D5)
+#define MICROPY_HW_UART2_RX         (pin_D6)
+#define MICROPY_HW_UART2_RTS        (pin_D4)
+#define MICROPY_HW_UART2_CTS        (pin_D3)
+#define MICROPY_HW_UART3_TX         (pin_D8)
+#define MICROPY_HW_UART3_RX         (pin_D9)
+#define MICROPY_HW_UART6_TX         (pin_G14)
+#define MICROPY_HW_UART6_RX         (pin_G9)
+#define MICROPY_HW_UART_REPL        PYB_UART_3
+#define MICROPY_HW_UART_REPL_BAUD   115200
+
+// I2C buses
+#define MICROPY_HW_I2C1_SCL         (pin_B8)
+#define MICROPY_HW_I2C1_SDA         (pin_B9)
+#define MICROPY_HW_I2C3_SCL         (pin_H7)
+#define MICROPY_HW_I2C3_SDA         (pin_H8)
+
+// SPI buses
+#define MICROPY_HW_SPI3_NSS         (pin_A4)
+#define MICROPY_HW_SPI3_SCK         (pin_B3)
+#define MICROPY_HW_SPI3_MISO        (pin_B4)
+#define MICROPY_HW_SPI3_MOSI        (pin_B5)
+
+// CAN buses
+#define MICROPY_HW_CAN1_TX          (pin_B9)
+#define MICROPY_HW_CAN1_RX          (pin_B8)
+#define MICROPY_HW_CAN2_TX          (pin_B13)
+#define MICROPY_HW_CAN2_RX          (pin_B12)
+
+// USRSW is pulled low. Pressing the button makes the input go high.
+#define MICROPY_HW_USRSW_PIN        (pin_C13)
+#define MICROPY_HW_USRSW_PULL       (GPIO_NOPULL)
+#define MICROPY_HW_USRSW_EXTI_MODE  (GPIO_MODE_IT_RISING)
+#define MICROPY_HW_USRSW_PRESSED    (1)
+
+// LEDs
+#define MICROPY_HW_LED1             (pin_B0) // green
+#define MICROPY_HW_LED2             (pin_B7) // blue
+#define MICROPY_HW_LED3             (pin_B14) // red
+#define MICROPY_HW_LED_ON(pin)      (mp_hal_pin_high(pin))
+#define MICROPY_HW_LED_OFF(pin)     (mp_hal_pin_low(pin))
+
+// USB config (CN13 - USB OTG FS)
+#define MICROPY_HW_USB_FS              (1)
+#define MICROPY_HW_USB_VBUS_DETECT_PIN (pin_A9)
+#define MICROPY_HW_USB_OTG_ID_PIN      (pin_A10)
+
+// Ethernet via RMII
+#define MICROPY_HW_ETH_MDC          (pin_C1)
+#define MICROPY_HW_ETH_MDIO         (pin_A2)
+#define MICROPY_HW_ETH_RMII_REF_CLK (pin_A1)
+#define MICROPY_HW_ETH_RMII_CRS_DV  (pin_A7)
+#define MICROPY_HW_ETH_RMII_RXD0    (pin_C4)
+#define MICROPY_HW_ETH_RMII_RXD1    (pin_C5)
+#define MICROPY_HW_ETH_RMII_TX_EN   (pin_G11)
+#define MICROPY_HW_ETH_RMII_TXD0    (pin_G13)
+#define MICROPY_HW_ETH_RMII_TXD1    (pin_B13)

ports/stm32/boards/NUCLEO_F756ZG/mpconfigboard.mk

@@ -0,0 +1,11 @@
+MCU_SERIES = f7
+CMSIS_MCU = STM32F756xx
+AF_FILE = boards/stm32f746_af.csv
+LD_FILES = boards/stm32f746.ld boards/common_ifs.ld
+TEXT0_ADDR = 0x08000000
+TEXT1_ADDR = 0x08020000
+
+# MicroPython settings
+MICROPY_PY_LWIP = 1
+MICROPY_PY_USSL = 1
+MICROPY_SSL_MBEDTLS = 1

ports/stm32/boards/NUCLEO_F756ZG/pins.csv

@@ -0,0 +1,77 @@
+A0,PA3
+A1,PC0
+A2,PC3
+A3,PF3
+A4,PF5
+A5,PF10
+D0,PG9
+D1,PG14
+D2,PF15
+D3,PE13
+D4,PF14
+D5,PE11
+D6,PE9
+D7,PF13
+D8,PF12
+D9,PD15
+D10,PD14
+D11,PA7
+D12,PA6
+D13,PA5
+D14,PB9
+D15,PB8
+D16,PC6
+D17,PB15
+D18,PB13
+D19,PB12
+D20,PA15
+D21,PC7
+D22,PB5
+D23,PB3
+D24,PA4
+D25,PB4
+LED1,PB0
+LED2,PB7
+LED3,PB14
+SW,PC13
+TP1,PH2
+TP2,PI8
+TP3,PH15
+AUDIO_INT,PD6
+AUDIO_SDA,PH8
+AUDIO_SCL,PH7
+EXT_SDA,PB9
+EXT_SCL,PB8
+EXT_RST,PG3
+SD_SW,PC13
+LCD_BL_CTRL,PK3
+LCD_INT,PI13
+LCD_SDA,PH8
+LCD_SCL,PH7
+OTG_FS_POWER,PD5
+OTG_FS_OVER_CURRENT,PD4
+OTG_HS_OVER_CURRENT,PE3
+USB_VBUS,PA9
+USB_ID,PA10
+USB_DM,PA11
+USB_DP,PA12
+VCP_TX,PD8
+VCP_RX,PD9
+UART2_TX,PD5
+UART2_RX,PD6
+UART2_RTS,PD4
+UART2_CTS,PD3
+UART6_TX,PG14
+UART6_RX,PG9
+SPI_B_NSS,PA4
+SPI_B_SCK,PB3
+SPI_B_MOSI,PB5
+ETH_MDC,PC1
+ETH_MDIO,PA2
+ETH_RMII_REF_CLK,PA1
+ETH_RMII_CRS_DV,PA7
+ETH_RMII_RXD0,PC4
+ETH_RMII_RXD1,PC5
+ETH_RMII_TX_EN,PG11
+ETH_RMII_TXD0,PG13
+ETH_RMII_TXD1,PB13

ports/stm32/boards/NUCLEO_F756ZG/stm32f7xx_hal_conf.h

@@ -0,0 +1,19 @@
+/* This file is part of the MicroPython project, http://micropython.org/
+ * The MIT License (MIT)
+ * Copyright (c) 2019 Damien P. George
+ */
+#ifndef MICROPY_INCLUDED_STM32F7XX_HAL_CONF_H
+#define MICROPY_INCLUDED_STM32F7XX_HAL_CONF_H
+
+#include "boards/stm32f7xx_hal_conf_base.h"
+
+// Oscillator values in Hz
+#define HSE_VALUE (8000000)
+#define LSE_VALUE (32768)
+#define EXTERNAL_CLOCK_VALUE (12288000)
+
+// Oscillator timeouts in ms
+#define HSE_STARTUP_TIMEOUT (5000)
+#define LSE_STARTUP_TIMEOUT (5000)
+
+#endif // MICROPY_INCLUDED_STM32F7XX_HAL_CONF_H

ports/stm32/pyb_i2c.c

@@ -137,7 +137,7 @@ const pyb_i2c_obj_t pyb_i2c_obj[] = {
 
 #define PYB_I2C_TIMINGR (1)
 
-#if defined(STM32F745xx) || defined(STM32F746xx)
+#if defined(STM32F745xx) || defined(STM32F746xx) || defined(STM32F756xx)
 
 // The value 0x40912732 was obtained from the DISCOVERY_I2Cx_TIMING constant
 // defined in the STM32F7Cube file Drivers/BSP/STM32F746G-Discovery/stm32f7456g_discovery.h