AUDIO loopback with DISCO_H747I
Dependencies: BSP_DISCO_H747I
Building
hg clone https://mbed.org/teams/ST/code/DISCO_H747I_AUDIO_demo
cd DISCO_H747I_AUDIO_demo
mbed deploy
mbed compile -m DISCO_H747I -t <GCC_ARM/ARM/IAR> -f
Running
A single printf is done at main start
Audio is recorded from board micro (U21) next to joystick.
Audio output is the jack connector (CN11) (green one).
Warning
Audio configuration is not compatible with Ethernet HW patch
https://os.mbed.com/teams/ST/wiki/DISCO_H747I-modifications-for-Ethernet
Diff: TOOLCHAIN_GCC_ARM/STM32H747xI.ld
- Revision:
- 0:78e37c7585e6
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/TOOLCHAIN_GCC_ARM/STM32H747xI.ld Thu Nov 07 11:33:58 2019 +0100 @@ -0,0 +1,192 @@ +/* Linker script to configure memory regions. */ +/******************************************************************************* + * @attention + * + * Copyright (c) 2018-2019 STMicroelectronics. + * All rights reserved. + * + * This software component is licensed by ST under BSD 3-Clause license, + * the "License"; You may not use this file except in compliance with the + * License. You may obtain a copy of the License at: + * opensource.org/licenses/BSD-3-Clause + * + ****************************************************************************** + */ + +#if !defined(MBED_APP_START) + #define MBED_APP_START 0x08000000 +#endif + +#if !defined(MBED_APP_SIZE) + #define MBED_APP_SIZE 1024K +#endif + +#if !defined(MBED_BOOT_STACK_SIZE) + #define MBED_BOOT_STACK_SIZE 0x400 +#endif + +STACK_SIZE = MBED_BOOT_STACK_SIZE; + +MEMORY +{ + FLASH (rx) : ORIGIN = MBED_APP_START, LENGTH = MBED_APP_SIZE + DTCMRAM (rwx) : ORIGIN = 0x20000298, LENGTH = 128K-0x298 + RAM (xrw) : ORIGIN = 0x24000000, LENGTH = 512K + RAM_D2 (xrw) : ORIGIN = 0x30000000, LENGTH = 288K + RAM_D3 (xrw) : ORIGIN = 0x38000000, LENGTH = 64K + ITCMRAM (xrw) : ORIGIN = 0x00000000, LENGTH = 64K +} + +/* Linker script to place sections and symbol values. Should be used together + * with other linker script that defines memory regions FLASH and RAM. + * It references following symbols, which must be defined in code: + * Reset_Handler : Entry of reset handler + * + * It defines following symbols, which code can use without definition: + * __exidx_start + * __exidx_end + * __etext + * __data_start__ + * __preinit_array_start + * __preinit_array_end + * __init_array_start + * __init_array_end + * __fini_array_start + * __fini_array_end + * __data_end__ + * __bss_start__ + * __bss_end__ + * __end__ + * end + * __HeapLimit + * __StackLimit + * __StackTop + * __stack + * _estack + */ +ENTRY(Reset_Handler) + +SECTIONS +{ + .text : + { + KEEP(*(.isr_vector)) + *(.text*) + KEEP(*(.init)) + KEEP(*(.fini)) + + /* .ctors */ + *crtbegin.o(.ctors) + *crtbegin?.o(.ctors) + *(EXCLUDE_FILE(*crtend?.o *crtend.o) .ctors) + *(SORT(.ctors.*)) + *(.ctors) + + /* .dtors */ + *crtbegin.o(.dtors) + *crtbegin?.o(.dtors) + *(EXCLUDE_FILE(*crtend?.o *crtend.o) .dtors) + *(SORT(.dtors.*)) + *(.dtors) + + *(.rodata*) + + KEEP(*(.eh_frame*)) + } > FLASH + + .ARM.extab : + { + *(.ARM.extab* .gnu.linkonce.armextab.*) + } > FLASH + + __exidx_start = .; + .ARM.exidx : + { + *(.ARM.exidx* .gnu.linkonce.armexidx.*) + } > FLASH + __exidx_end = .; + + __etext = .; + _sidata = .; + + .data : AT (__etext) + { + __data_start__ = .; + _sdata = .; + *(vtable) + *(.data*) + + . = ALIGN(8); + /* preinit data */ + PROVIDE_HIDDEN (__preinit_array_start = .); + KEEP(*(.preinit_array)) + PROVIDE_HIDDEN (__preinit_array_end = .); + + . = ALIGN(8); + /* init data */ + PROVIDE_HIDDEN (__init_array_start = .); + KEEP(*(SORT(.init_array.*))) + KEEP(*(.init_array)) + PROVIDE_HIDDEN (__init_array_end = .); + + + . = ALIGN(8); + /* finit data */ + PROVIDE_HIDDEN (__fini_array_start = .); + KEEP(*(SORT(.fini_array.*))) + KEEP(*(.fini_array)) + PROVIDE_HIDDEN (__fini_array_end = .); + + KEEP(*(.jcr*)) + . = ALIGN(8); + /* All data end */ + __data_end__ = .; + _edata = .; + + } > RAM + + .bss : + { + . = ALIGN(8); + __bss_start__ = .; + _sbss = .; + *(.bss*) + *(COMMON) + . = ALIGN(8); + __bss_end__ = .; + _ebss = .; + } > RAM + + .heap (COPY): + { + __end__ = .; + end = __end__; + *(.heap*) + . = ORIGIN(RAM) + LENGTH(RAM) - STACK_SIZE; + __HeapLimit = .; + } > RAM + + + /* .stack_dummy section doesn't contains any symbols. It is only + * used for linker to calculate size of stack sections, and assign + * values to stack symbols later */ + .stack_dummy (COPY): + { + *(.stack*) + } > RAM + + /* Set stack top to end of RAM, and stack limit move down by + * size of stack_dummy section */ + __StackTop = ORIGIN(RAM) + LENGTH(RAM); + _estack = __StackTop; + __StackLimit = __StackTop - STACK_SIZE; + PROVIDE(__stack = __StackTop); + + /* Check if data + heap + stack exceeds RAM limit */ + ASSERT(__StackLimit >= __HeapLimit, "region RAM overflowed with stack") + + .RAM_D3 (NOLOAD): + { + *(.RAM_D3) + } >RAM_D3 +}