micropython · yn386 · Jul 5, 2025 · Jul 5, 2025 · Jul 5, 2025 · Jul 5, 2025
diff --git a/ports/stm32/adc.c b/ports/stm32/adc.c
@@ -117,10 +117,10 @@
 
 #elif defined(STM32H7)
 
-#define ADC_SCALE_V             (3.3f)
-#define ADC_CAL_ADDRESS         (0x1FF1E860)
-#define ADC_CAL1                ((uint16_t *)(0x1FF1E820))
-#define ADC_CAL2                ((uint16_t *)(0x1FF1E840))
+#define ADC_SCALE_V             (VREFINT_CAL_VREF / 1000.0f)
+#define ADC_CAL_ADDRESS         (VREFINT_CAL_ADDR)
+#define ADC_CAL1                (TEMPSENSOR_CAL1_ADDR)
+#define ADC_CAL2                (TEMPSENSOR_CAL2_ADDR)
 #define ADC_CAL_BITS            (16)
 
 #elif defined(STM32L1)

diff --git a/ports/stm32/boards/NUCLEO_H7A3ZI_Q/board.json b/ports/stm32/boards/NUCLEO_H7A3ZI_Q/board.json
@@ -0,0 +1,15 @@
+{
+    "deploy": [
+        "../deploy.md"
+    ],
+    "docs": "",
+    "features": [],
+    "images": [
+        "nucleo_h7a3zi_q.jpg"
+    ],
+    "mcu": "stm32h7",
+    "product": "Nucleo H7A3ZI-Q",
+    "thumbnail": "",
+    "url": "https://www.st.com/ja/evaluation-tools/nucleo-h7a3zi-q.html",
+    "vendor": "ST Microelectronics"
+}
diff --git a/ports/stm32/boards/NUCLEO_H7A3ZI_Q/board_init.c b/ports/stm32/boards/NUCLEO_H7A3ZI_Q/board_init.c
@@ -0,0 +1,7 @@
+#include "py/mphal.h"
+
+void NUCLEO_H7A3ZIQ_board_early_init(void) {
+    // Turn off the USB switch.
+    mp_hal_pin_output(pyb_pin_OTG_FS_POWER);
+    mp_hal_pin_low(pyb_pin_OTG_FS_POWER);
+}
diff --git a/ports/stm32/boards/NUCLEO_H7A3ZI_Q/mpconfigboard.h b/ports/stm32/boards/NUCLEO_H7A3ZI_Q/mpconfigboard.h
@@ -0,0 +1,116 @@
+#define MICROPY_HW_BOARD_NAME               "NUCLEO_H7A3ZI_Q"
+#define MICROPY_HW_MCU_NAME                 "STM32H7A3ZIT6Q"
+
+#define MICROPY_HW_ENABLE_RTC               (1)
+#define MICROPY_HW_ENABLE_SERVO             (1)
+#define MICROPY_HW_ENABLE_RNG               (0) // RNG needs proper configuration
+#define MICROPY_HW_ENABLE_ADC               (1)
+#define MICROPY_HW_ENABLE_DAC               (1)
+#define MICROPY_HW_ENABLE_USB               (1)
+#define MICROPY_HW_ENABLE_SDCARD            (0)
+#define MICROPY_HW_HAS_SWITCH               (1)
+#define MICROPY_HW_HAS_FLASH                (1)
+
+#define MICROPY_BOARD_EARLY_INIT            NUCLEO_H7A3ZIQ_board_early_init
+
+#define MICROPY_HW_ENABLE_INTERNAL_FLASH_STORAGE (1)
+
+// There is no external HS crystal, instead it comes from ST-LINK MCO output which is 8MHz.
+// The following gives a 280Hz CPU speed.
+#define MICROPY_HW_CLK_USE_BYPASS           (1)
+#define MICROPY_HW_CLK_PLLM                 (2)
+#define MICROPY_HW_CLK_PLLN                 (140)
+#define MICROPY_HW_CLK_PLLP                 (2)
+#define MICROPY_HW_CLK_PLLQ                 (4)
+#define MICROPY_HW_CLK_PLLR                 (2)
+#define MICROPY_HW_CLK_PLLVCI               (RCC_PLL1VCIRANGE_2)
+#define MICROPY_HW_CLK_PLLVCO               (RCC_PLL1VCOWIDE)
+#define MICROPY_HW_CLK_PLLFRAC              (0)
+
+// The USB clock is set using PLL3
+#define MICROPY_HW_CLK_PLL3M                (1)
+#define MICROPY_HW_CLK_PLL3N                (24)
+#define MICROPY_HW_CLK_PLL3P                (2)
+#define MICROPY_HW_CLK_PLL3Q                (4)
+#define MICROPY_HW_CLK_PLL3R                (2)
+#define MICROPY_HW_CLK_PLL3VCI              (RCC_PLL3VCIRANGE_3)
+#define MICROPY_HW_CLK_PLL3VCO              (RCC_PLL3VCOWIDE)
+#define MICROPY_HW_CLK_PLL3FRAC             (0)
+
+// 6 wait states when running at 280MHz (VOS0 range)
+#define MICROPY_HW_FLASH_LATENCY            FLASH_LATENCY_6
+
+// The board has an external 32kHz crystal attached
+#define MICROPY_HW_RTC_USE_LSE              (1)
+
+// SMPS configuration
+#define MICROPY_HW_PWR_SMPS_CONFIG          (PWR_DIRECT_SMPS_SUPPLY)
+
+// UART config
+#define MICROPY_HW_UART1_TX                 (pin_B14)   // Arduino D1,  pin14 on CN10
+#define MICROPY_HW_UART1_RX                 (pin_B15)   // Arduino D0,  pin16 on CN10
+#define MICROPY_HW_UART2_TX                 (pin_D5)    //              pin 6 on CN9
+#define MICROPY_HW_UART2_RX                 (pin_D6)    //              pin 4 on CN9
+#define MICROPY_HW_UART2_RTS                (pin_D4)    //              pin 8 on CN9
+#define MICROPY_HW_UART2_CTS                (pin_D3)    //              pin10 on CN9
+#define MICROPY_HW_UART3_TX                 (pin_D8)
+#define MICROPY_HW_UART3_RX                 (pin_D9)
+#define MICROPY_HW_UART5_TX                 (pin_B6)
+#define MICROPY_HW_UART5_RX                 (pin_B12)
+#define MICROPY_HW_UART6_TX                 (pin_C6)
+#define MICROPY_HW_UART6_RX                 (pin_C7)
+#define MICROPY_HW_UART7_TX                 (pin_F7)
+#define MICROPY_HW_UART7_RX                 (pin_F6)
+#define MICROPY_HW_UART8_TX                 (pin_E1)
+#define MICROPY_HW_UART8_RX                 (pin_E0)
+
+// UART3 connects to the STLINK-V3 on the Nucleo board
+// and this is exposed as a USB Serial port.
+#define MICROPY_HW_UART_REPL                PYB_UART_3
+#define MICROPY_HW_UART_REPL_BAUD           115200
+
+// I2C buses
+#define MICROPY_HW_I2C1_SCL                 (pin_B8)    // Arduino D15, pin 2 on CN7
+#define MICROPY_HW_I2C1_SDA                 (pin_B9)    // Arduino D14, pin 4 on CN7
+#define MICROPY_HW_I2C4_SCL                 (pin_F14)   //              pin19 on CN9
+#define MICROPY_HW_I2C4_SDA                 (pin_F15)   //              pin12 on CN9
+
+// SPI buses
+#define MICROPY_HW_SPI1_NSS                 (pin_A4)    //              pin17 on CN7
+#define MICROPY_HW_SPI1_SCK                 (pin_A5)    // Arduino D13, pin10 on CN7
+#define MICROPY_HW_SPI1_MISO                (pin_A6)    // Arduino D12, pin12 on CN7
+#define MICROPY_HW_SPI1_MOSI                (pin_A7)    // Arduino D11, pin14 on CN7
+#define MICROPY_HW_SPI2_NSS                 (pin_B12)
+#define MICROPY_HW_SPI2_SCK                 (pin_B10)
+#define MICROPY_HW_SPI2_MISO                (pin_C2)
+#define MICROPY_HW_SPI2_MOSI                (pin_C1)
+#define MICROPY_HW_SPI3_NSS                 (pin_A15)
+#define MICROPY_HW_SPI3_SCK                 (pin_B2)
+#define MICROPY_HW_SPI3_MISO                (pin_C10)
+#define MICROPY_HW_SPI3_MOSI                (pin_C11)
+
+// 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_E1)    // yellow
+#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
+#define MICROPY_HW_USB_HS                   (1)
+#define MICROPY_HW_USB_HS_IN_FS             (1)
+#define MICROPY_HW_USB_VBUS_DETECT_PIN      (pin_A9)
+#define MICROPY_HW_USB_OTG_ID_PIN           (pin_A10)
+
+// FDCAN bus
+#define MICROPY_HW_CAN1_NAME                "FDCAN1"
+#define MICROPY_HW_CAN1_TX                  (pin_D1)
+#define MICROPY_HW_CAN1_RX                  (pin_D0)
+
+void NUCLEO_H7A3ZIQ_board_early_init(void);
diff --git a/ports/stm32/boards/NUCLEO_H7A3ZI_Q/mpconfigboard.mk b/ports/stm32/boards/NUCLEO_H7A3ZI_Q/mpconfigboard.mk
@@ -0,0 +1,17 @@
+USE_MBOOT ?= 0
+
+# MCU settings
+MCU_SERIES = h7
+CMSIS_MCU = STM32H7A3xxQ
+MICROPY_FLOAT_IMPL = double
+AF_FILE = boards/stm32h7b3_af.csv
+
+ifeq ($(USE_MBOOT),1)
+# When using Mboot all the text goes together after the filesystem
+LD_FILES = boards/stm32h743.ld boards/common_blifs.ld
+TEXT0_ADDR = 0x08040000
+else
+# When not using Mboot the ISR text goes first, then the rest after the filesystem
+LD_FILES = boards/stm32h7a3.ld boards/common_basic.ld
+TEXT0_ADDR = 0x08000000
+endif
diff --git a/ports/stm32/boards/NUCLEO_H7A3ZI_Q/pins.csv b/ports/stm32/boards/NUCLEO_H7A3ZI_Q/pins.csv
@@ -0,0 +1,123 @@
+A0,PA3
+A1,PC0
+A2,PC3
+A3,PB1
+A4,PC2
+A5,PF11
+A6,PC1
+A7,PC5
+A8,PA2
+D0,PB7
+D1,PB6
+D2,PG14
+D3,PE13
+D4,PE14
+D5,PE11
+D6,PA8
+D7,PG12
+D8,PG9
+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
+D26,PG6
+D27,PB2
+D28,PD13
+D29,PD12
+D30,PD11
+D31,PE2
+D32,PA0
+D33,PB0
+D34,PE0
+D35,PB11
+D36,PB10
+D37,PE15
+D38,PE6
+D39,PE12
+D40,PE10
+D41,PE7
+D42,PE8
+D43,PC8
+D44,PC9
+D45,PC10
+D46,PC11
+D47,PC12
+D48,PD2
+D49,PG10
+D50,PG8
+D51,PD7
+D52,PD6
+D53,PD5
+D54,PD4
+D55,PD3
+D56,PE2
+D57,PE4
+D58,PE5
+D59,PE6
+D60,PE3
+D61,PF8
+D62,PF7
+D63,PF9
+D64,PD10
+D65,PB14
+D66,PD1
+D67,PD0
+D68,PF15
+D69,PF14
+D70,PB5
+D71,PE9
+D72,PB2
+DAC1,PA4
+DAC2,PA5
+LED1,PB0
+LED2,PE1
+LED3,PB14
+SW,PC13
+I2C1_SDA,PB9
+I2C1_SCL,PB8
+I2C4_SCL,PF14
+I2C4_SDA,PF15
+OTG_FS_POWER,PD10
+OTG_FS_OVER_CURRENT,PG7
+USB_VBUS,PA9
+USB_ID,PA10
+USB_DM,PA11
+USB_DP,PA12
+UART1_TX,PB14
+UART1_RX,PB15
+UART2_TX,PD5
+UART2_RX,PD6
+UART2_RTS,PD4
+UART2_CTS,PD3
+UART3_TX,PD8
+UART3_RX,PD9
+UART5_TX,PB6
+UART5_RX,PB12
+UART6_TX,PC6
+UART6_RX,PC7
+UART7_TX,PF7
+UART7_RX,PF6
+UART8_TX,PE1
+UART8_RX,PE0
+,PC1
+,PA2
+,PA1
+,PA7
+,PC4
+,PC5
+,PG11
+,PG13
+,PB13
diff --git a/ports/stm32/boards/NUCLEO_H7A3ZI_Q/stm32h7xx_hal_conf.h b/ports/stm32/boards/NUCLEO_H7A3ZI_Q/stm32h7xx_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_STM32H7XX_HAL_CONF_H
+#define MICROPY_INCLUDED_STM32H7XX_HAL_CONF_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)
+
+#include "boards/stm32h7xx_hal_conf_base.h"
+
+#endif // MICROPY_INCLUDED_STM32H7XX_HAL_CONF_H
diff --git a/ports/stm32/boards/stm32h7a3.ld b/ports/stm32/boards/stm32h7a3.ld
@@ -0,0 +1,39 @@
+/*
+    GNU linker script for STM32H7A3
+*/
+
+/* Specify the memory areas */
+MEMORY
+{
+    FLASH (rx)      : ORIGIN = 0x08000000, LENGTH = 2048K   /* sectors   0- 15,  128K */
+    FLASH_APP  (rx) : ORIGIN = 0x08020000, LENGTH = 1664K   /* sectors  16-223, 1664K */
+    FLASH_FS (r)    : ORIGIN = 0x081c0000, LENGTH =  256K   /* sectors 224-255,  256K */
+    DTCM (xrw)      : ORIGIN = 0x20000000, LENGTH =  120K   /* Used for storage cache */
+    FS_CACHE (xrw)  : ORIGIN = 0x2001e000, LENGTH =    8K   /* Used for storage cache */
+    RAM (xrw)       : ORIGIN = 0x24000000, LENGTH = 1024K
+    RAM_CD (xrw)    : ORIGIN = 0x30000000, LENGTH =  128K
+    RAM_SRD (xrw)   : ORIGIN = 0x38000000, LENGTH =   32K
+}
+
+/* produce a link error if there is not this amount of RAM for these sections */
+_minimum_stack_size = 2K;
+_minimum_heap_size = 16K;
+
+/* Define the stack.  The stack is full descending so begins just above last byte
+   of RAM.  Note that EABI requires the stack to be 8-byte aligned for a call. */
+_estack = ORIGIN(RAM) + LENGTH(RAM) - _estack_reserve;
+_sstack = _estack - 16K; /* tunable */
+
+/* RAM extents for the garbage collector */
+_ram_start = ORIGIN(RAM);
+_ram_end = ORIGIN(RAM) + LENGTH(RAM);
+_heap_start = _ebss; /* heap starts just after statically allocated memory */
+_heap_end = _sstack;
+
+/* Location of filesystem RAM cache */
+_micropy_hw_internal_flash_storage_ram_cache_start = ORIGIN(FS_CACHE);
+_micropy_hw_internal_flash_storage_ram_cache_end = ORIGIN(FS_CACHE) + LENGTH(FS_CACHE);
+
+/* Location of filesystem flash storage */
+_micropy_hw_internal_flash_storage_start = ORIGIN(FLASH_FS);
+_micropy_hw_internal_flash_storage_end = ORIGIN(FLASH_FS) + LENGTH(FLASH_FS);
diff --git a/ports/stm32/flash.c b/ports/stm32/flash.c
@@ -157,8 +157,13 @@ static const flash_layout_t flash_layout[] = {
 
 #define FLASH_LAYOUT_IS_HOMOGENEOUS (1)
 #define FLASH_LAYOUT_START_ADDR     (FLASH_BASE)
+#if defined(STM32H7A3xx) || defined(STM32H7A3xxQ)
+#define FLASH_LAYOUT_SECTOR_SIZE    (0x2000)
+#define FLASH_LAYOUT_NUM_SECTORS    (256)
+#else
 #define FLASH_LAYOUT_SECTOR_SIZE    (0x20000)
 #define FLASH_LAYOUT_NUM_SECTORS    (16)
+#endif
 
 #else
 #error Unsupported processor

diff --git a/ports/stm32/usbd_conf.c b/ports/stm32/usbd_conf.c
@@ -177,7 +177,7 @@ void HAL_PCD_MspInit(PCD_HandleTypeDef *hpcd) {
 
         // Configure USB GPIO's.
 
-        #if defined(STM32H723xx)
+        #if defined(STM32H723xx) || (STM32H7A3xx) || defined(STM32H7A3xxQ)
 
         // These MCUs don't have an alternate function for USB but rather require
         // the pins to be disconnected from all peripherals, ie put in analog mode.
@@ -195,7 +195,7 @@ void HAL_PCD_MspInit(PCD_HandleTypeDef *hpcd) {
 
         // Other MCUs have an alternate function for GPIO's to be in USB mode.
 
-        #if defined(STM32H7A3xx) || defined(STM32H7A3xxQ) || defined(STM32H7B3xx) || defined(STM32H7B3xxQ)
+        #if defined(STM32H7B3xx) || defined(STM32H7B3xxQ)
         const uint32_t otg_alt = GPIO_AF10_OTG1_FS;
         #elif defined(STM32H7)
         const uint32_t otg_alt = GPIO_AF12_OTG2_FS;