STM32: Meowbit support

.github/workflows/build.yml

@@ -170,6 +170,7 @@ jobs:
         - "kicksat-sprite"
         - "makerdiary_nrf52840_mdk"
         - "makerdiary_nrf52840_mdk_usb_dongle"
+        - "meowbit_v121"
         - "meowmeow"
         - "metro_m0_express"
         - "metro_m4_airlift_lite"

main.c

@@ -57,6 +57,8 @@
 #include "supervisor/shared/stack.h"
 #include "supervisor/serial.h"
 
+#include "boards/board.h"
+
 #if CIRCUITPY_DISPLAYIO
 #include "shared-module/displayio/__init__.h"
 #endif
@@ -425,6 +427,9 @@ int __attribute__((used)) main(void) {
     // no SPI flash filesystem, and we might erase the existing one.
     filesystem_init(safe_mode == NO_SAFE_MODE, false);
 
+    // displays init after filesystem, since they could share the flash SPI
+    board_init(); 
+
     // Reset everything and prep MicroPython to run boot.py.
     reset_port();
     reset_board();

ports/atmel-samd/supervisor/port.c

@@ -232,9 +232,6 @@ safe_mode_t port_init(void) {
     // Reset everything into a known state before board_init.
     reset_port();
 
-    // Init the board last so everything else is ready
-    board_init();
-
     #ifdef SAMD21
     if (PM->RCAUSE.bit.BOD33 == 1 || PM->RCAUSE.bit.BOD12 == 1) {
         return BROWNOUT;

ports/mimxrt10xx/supervisor/port.c

@@ -256,9 +256,6 @@ safe_mode_t port_init(void) {
     // Reset everything into a known state before board_init.
     reset_port();
 
-    // Init the board last so everything else is ready
-    board_init();
-
     if (board_requests_safe_mode()) {
         return USER_SAFE_MODE;
     }

ports/nrf/supervisor/port.c

@@ -92,9 +92,6 @@ safe_mode_t port_init(void) {
     rtc_init();
     #endif
 
-    // Will do usb_init() if chip supports USB.
-    board_init();
-
     return NO_SAFE_MODE;
 }
 

ports/stm32f4/Makefile

@@ -22,7 +22,7 @@
 # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 # THE SOFTWARE.
-DEBUG = 1
+# DEBUG = 1
 
 # Select the board to build for.
 ifeq ($(BOARD),)
@@ -85,10 +85,15 @@ ifeq ($(DEBUG), 1)
   CFLAGS += -fno-inline -fno-ipa-sra
 else
   CFLAGS += -Os -DNDEBUG
+  CFLAGS += -ggdb
   # TODO: Test with -flto
   ### CFLAGS += -flto
 endif
 
+ifndef BOOTLOADER_OFFSET
+	BOOTLOADER_OFFSET := 0x8000000
+endif
+
 C_DEFS = -DMCU_PACKAGE=$(MCU_PACKAGE) -DUSE_HAL_DRIVER -DUSE_FULL_LL_DRIVER -D$(CMSIS_MCU)
 
 CFLAGS += $(INC) -Werror -Wall -std=gnu11 -nostdlib $(BASE_CFLAGS) $(C_DEFS) $(CFLAGS_MOD) $(COPT)
@@ -256,7 +261,7 @@ $(BUILD)/firmware.hex: $(BUILD)/firmware.elf
 
 $(BUILD)/firmware.uf2: $(BUILD)/firmware.hex
 	$(ECHO) "Create $@"
-	$(PYTHON3) $(TOP)/tools/uf2/utils/uf2conv.py -f 0xADA52840 -c -o "$(BUILD)/firmware.uf2" $^
+	$(PYTHON3) $(TOP)/tools/uf2/utils/uf2conv.py -f 0x57755a57 -b $(BOOTLOADER_OFFSET) -c -o "$(BUILD)/firmware.uf2" $^
 
 include $(TOP)/py/mkrules.mk
 

ports/stm32f4/boards/STM32F401.ld

@@ -0,0 +1,132 @@
+/*
+    GNU linker script for STM32F401 with bootloader (from Meowbit Micropython)
+    Doesn't work: 
+
+    Traceback (most recent call last):
+  File "../../tools/build_memory_info.py", line 64, in <module>
+    regions[region] = int(eval(space))
+  File "<string>", line 1, in <module>
+NameError: name 'FLASH_ISR' is not defined
+*/
+
+/* Specify the memory areas */
+/*     FLASH_FS (rx)   : ORIGIN = 0x08020000, LENGTH = 128K */
+/* sectors 5 128K */
+MEMORY
+{
+    FLASH (rx)      : ORIGIN = 0x08010000, LENGTH = 512K - 64K /* entire flash */
+    FLASH_ISR (rx)  : ORIGIN = 0x08010000, LENGTH = 64K /* sector 4, sec 0~3 reserved for booloader */
+    FLASH_TEXT (rx) : ORIGIN = 0x08020000, LENGTH = 384K /* sectors 5, 6,7 are 128K */
+    RAM (xrw)       : ORIGIN = 0x20000194, LENGTH = 96K - 0x194
+}
+
+/* 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;
+
+ENTRY(Reset_Handler)
+
+/* define output sections */
+SECTIONS
+{
+    /* The startup code goes first into FLASH */
+    .isr_vector :
+    {
+        . = ALIGN(4);
+        KEEP(*(.isr_vector)) /* Startup code */
+
+        /* This first flash block is 16K annd the isr vectors only take up
+           about 400 bytes. So we pull in a couple of object files to pad it
+           out. */
+
+        . = ALIGN(4);
+
+        /* NOTE: If you update the list of files contained in .isr_vector,
+                 then be sure to also update smhal/Makefile where it forcibly
+           builds each of these files with -Os */
+
+        */ff.o(.text*)
+        */vfs_fat_*.o(.text*)
+        */py/formatfloat.o(.text*)
+        */py/parsenum.o(.text*)
+        */py/mpprint.o(.text*)
+
+        */py/compile.o(.text*)
+        */py/objset.o(.text*)
+        */py/mpz.o(.text*)
+        */py/vm.o(.text*)
+
+        . = ALIGN(4);
+    } >FLASH_ISR
+
+    /* The program code and other data goes into FLASH */
+    .text :
+    {
+        . = ALIGN(4);
+        *(.text*)          /* .text* sections (code) */
+        *(.rodata*)        /* .rodata* sections (constants, strings, etc.) */
+    /*  *(.glue_7)   */    /* glue arm to thumb code */
+    /*  *(.glue_7t)  */    /* glue thumb to arm code */
+
+        . = ALIGN(4);
+        _etext = .;        /* define a global symbol at end of code */
+    } >FLASH_TEXT
+
+    /* used by the startup to initialize data */
+    _sidata = LOADADDR(.data);
+
+    /* This is the initialized data section
+    The program executes knowing that the data is in the RAM
+    but the loader puts the initial values in the FLASH (inidata).
+    It is one task of the startup to copy the initial values from FLASH to RAM. */
+    .data :
+    {
+        . = ALIGN(4);
+        _sdata = .;        /* create a global symbol at data start; used by startup code in order to initialise the .data section in RAM */
+        *(.data*)          /* .data* sections */
+
+        . = ALIGN(4);
+        _edata = .;        /* define a global symbol at data end; used by startup code in order to initialise the .data section in RAM */
+    } >RAM AT> FLASH_TEXT
+
+    /* Uninitialized data section */
+    .bss :
+    {
+        . = ALIGN(4);
+        _sbss = .;         /* define a global symbol at bss start; used by startup code */
+        *(.bss*)
+        *(COMMON)
+
+        . = ALIGN(4);
+        _ebss = .;         /* define a global symbol at bss end; used by startup code and GC */
+    } >RAM
+
+    /* this is to define the start of the heap, and make sure we have a minimum size */
+    .heap :
+    {
+        . = ALIGN(4);
+        . = . + _minimum_heap_size;
+        . = ALIGN(4);
+    } >RAM
+
+    /* this just checks there is enough RAM for the stack */
+    .stack :
+    {
+        . = ALIGN(4);
+        . = . + _minimum_stack_size;
+        . = ALIGN(4);
+    } >RAM
+
+    .ARM.attributes 0 : { *(.ARM.attributes) }
+}

ports/stm32f4/boards/STM32F401_boot.ld

@@ -0,0 +1,106 @@
+/*
+    GNU linker script for STM32F401 with bootloader (such as the Meowbit)
+*/
+
+/* Specify the memory areas */
+MEMORY
+{
+    FLASH (rx)      : ORIGIN = 0x08010000, LENGTH = 512K - 64K /* entire flash */
+    FLASH_ISR (rx)  : ORIGIN = 0x08010000, LENGTH = 64K 
+    FLASH_TEXT (rx) : ORIGIN = 0x08020000, LENGTH = 384K /* sector 4 is 64K, sectors 5,6,7 are 128K */
+    RAM (xrw)       : ORIGIN = 0x20000194, LENGTH = 96K - 0x194
+}
+
+/* produce a link error if there is not this amount of RAM for these sections */
+_minimum_stack_size = 2K;
+_minimum_heap_size = 16K;
+
+/* Define tho top end of 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);
+
+/* RAM extents for the garbage collector */
+_ram_start = ORIGIN(RAM);
+_ram_end = ORIGIN(RAM) + LENGTH(RAM);
+
+ENTRY(Reset_Handler)
+
+/* define output sections */
+SECTIONS
+{
+    /* The startup code goes first into FLASH */
+    .isr_vector :
+    {
+        . = ALIGN(4);
+        KEEP(*(.isr_vector)) /* Startup code */
+
+        /* This first flash block is 16K annd the isr vectors only take up
+           about 400 bytes. Micropython pads this with files, but this didn't
+           work with the size of Circuitpython's ff object. */
+
+        . = ALIGN(4);
+    } >FLASH_ISR
+
+    /* The program code and other data goes into FLASH */
+    .text :
+    {
+        . = ALIGN(4);
+        *(.text*)          /* .text* sections (code) */
+        *(.rodata*)        /* .rodata* sections (constants, strings, etc.) */
+    /*  *(.glue_7)   */    /* glue arm to thumb code */
+    /*  *(.glue_7t)  */    /* glue thumb to arm code */
+
+        . = ALIGN(4);
+        _etext = .;        /* define a global symbol at end of code */
+    } >FLASH_TEXT
+
+    /* used by the startup to initialize data */
+    _sidata = LOADADDR(.data);
+
+    /* This is the initialized data section
+    The program executes knowing that the data is in the RAM
+    but the loader puts the initial values in the FLASH (inidata).
+    It is one task of the startup to copy the initial values from FLASH to RAM. */
+    .data :
+    {
+        . = ALIGN(4);
+        _sdata = .;        /* create a global symbol at data start; used by startup code in order to initialise the .data section in RAM */
+        *(.data*)          /* .data* sections */
+
+        . = ALIGN(4);
+        _edata = .;        /* define a global symbol at data end; used by startup code in order to initialise the .data section in RAM */
+    } >RAM AT> FLASH_TEXT
+
+    /* Uninitialized data section */
+    .bss :
+    {
+        . = ALIGN(4);
+        _sbss = .;         /* define a global symbol at bss start; used by startup code */
+        *(.bss*)
+        *(COMMON)
+
+        . = ALIGN(4);
+        _ebss = .;         /* define a global symbol at bss end; used by startup code and GC */
+    } >RAM
+
+    /* this is to define the start of the heap, and make sure we have a minimum size */
+    .heap :
+    {
+        . = ALIGN(4);
+        . = . + _minimum_heap_size;
+        . = ALIGN(4);
+    } >RAM
+
+    /* this just checks there is enough RAM for the stack */
+    .stack :
+    {
+        . = ALIGN(4);
+        . = . + _minimum_stack_size;
+        . = ALIGN(4);
+    } >RAM
+
+    .ARM.attributes 0 : { *(.ARM.attributes) }
+}
+
+