Add STM32F0 firmware
parent
e2baca5c35
commit
87536ad9f8
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build/*
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src/.local.vimrc
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233
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@ -0,0 +1,7 @@
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source [find interface/stlink-v2.cfg]
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transport select "hla_swd"
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source [find target/stm32f0x.cfg]
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reset_config trst_and_srst
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init
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arm semihosting enable
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reset run
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@ -0,0 +1,6 @@
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target remote :3333
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file build/main.elf
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monitor reset halt
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monitor flash write_image erase build/main.bin 0x8000000
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#load build/main.elf
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monitor reset run
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@ -0,0 +1,163 @@
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/*
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*****************************************************************************
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**
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** File : STM32F030F4_FLASH.ld
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**
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** Abstract : Linker script for STM32F030F4 Device with
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** 16KByte FLASH, 4KByte RAM
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**
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** Set heap size, stack size and stack location according
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** to application requirements.
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**
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** Set memory bank area and size if external memory is used.
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**
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** Target : STMicroelectronics STM32
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**
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*****************************************************************************
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*/
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/* Entry Point */
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ENTRY(Reset_Handler)
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/* Highest address of the user mode stack */
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_estack = 0x20001000; /* end of 4K RAM */
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/* Generate a link error if heap and stack don't fit into RAM */
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_Min_Heap_Size = 0; /* required amount of heap */
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_Min_Stack_Size = 0x80; /* required amount of stack */
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/* Specify the memory areas */
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MEMORY
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{
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FLASH (rx) : ORIGIN = 0x08000000, LENGTH = 16K
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RAM (xrw) : ORIGIN = 0x20000000, LENGTH = 4K
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MEMORY_B1 (rx) : ORIGIN = 0x60000000, LENGTH = 0K
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}
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/* Define output sections */
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SECTIONS
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{
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/* The startup code goes first into FLASH */
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.isr_vector :
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{
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. = ALIGN(4);
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KEEP(*(.isr_vector)) /* Startup code */
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. = ALIGN(4);
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} >FLASH
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/* The program code and other data goes into FLASH */
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.text :
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{
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. = ALIGN(4);
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*(.text) /* .text sections (code) */
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*(.text*) /* .text* sections (code) */
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*(.glue_7) /* glue arm to thumb code */
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*(.glue_7t) /* glue thumb to arm code */
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*(.eh_frame)
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KEEP (*(.init))
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KEEP (*(.fini))
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. = ALIGN(4);
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_etext = .; /* define a global symbols at end of code */
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} >FLASH
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/* Constant data goes into FLASH */
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.rodata :
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{
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. = ALIGN(4);
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*(.rodata) /* .rodata sections (constants, strings, etc.) */
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*(.rodata*) /* .rodata* sections (constants, strings, etc.) */
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. = ALIGN(4);
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} >FLASH
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.ARM.extab : { *(.ARM.extab* .gnu.linkonce.armextab.*) } >FLASH
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.ARM : {
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__exidx_start = .;
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*(.ARM.exidx*)
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__exidx_end = .;
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} >FLASH
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.preinit_array :
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{
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PROVIDE_HIDDEN (__preinit_array_start = .);
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KEEP (*(.preinit_array*))
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PROVIDE_HIDDEN (__preinit_array_end = .);
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} >FLASH
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.init_array :
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{
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PROVIDE_HIDDEN (__init_array_start = .);
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KEEP (*(SORT(.init_array.*)))
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KEEP (*(.init_array*))
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PROVIDE_HIDDEN (__init_array_end = .);
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} >FLASH
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.fini_array :
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{
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PROVIDE_HIDDEN (__fini_array_start = .);
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KEEP (*(SORT(.fini_array.*)))
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KEEP (*(.fini_array*))
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PROVIDE_HIDDEN (__fini_array_end = .);
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} >FLASH
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/* used by the startup to initialize data */
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_sidata = LOADADDR(.data);
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/* Initialized data sections goes into RAM, load LMA copy after code */
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.data :
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{
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. = ALIGN(4);
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_sdata = .; /* create a global symbol at data start */
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*(.data) /* .data sections */
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*(.data*) /* .data* sections */
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. = ALIGN(4);
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_edata = .; /* define a global symbol at data end */
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} >RAM AT> FLASH
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/* Uninitialized data section */
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. = ALIGN(4);
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.bss :
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{
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/* This is used by the startup in order to initialize the .bss secion */
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_sbss = .; /* define a global symbol at bss start */
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__bss_start__ = _sbss;
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*(.bss)
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*(.bss*)
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*(COMMON)
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. = ALIGN(4);
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_ebss = .; /* define a global symbol at bss end */
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__bss_end__ = _ebss;
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} >RAM
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/* User_heap_stack section, used to check that there is enough RAM left */
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._user_heap_stack :
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{
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. = ALIGN(4);
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PROVIDE ( end = . );
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PROVIDE ( _end = . );
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. = . + _Min_Heap_Size;
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. = . + _Min_Stack_Size;
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. = ALIGN(4);
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} >RAM
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/* MEMORY_bank1 section, code must be located here explicitly */
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/* Example: extern int foo(void) __attribute__ ((section (".mb1text"))); */
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.memory_b1_text :
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{
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*(.mb1text) /* .mb1text sections (code) */
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*(.mb1text*) /* .mb1text* sections (code) */
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*(.mb1rodata) /* read-only data (constants) */
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*(.mb1rodata*)
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} >MEMORY_B1
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/* Remove information from the standard libraries */
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/DISCARD/ :
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{
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libc.a ( * )
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libm.a ( * )
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libgcc.a ( * )
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}
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.ARM.attributes 0 : { *(.ARM.attributes) }
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}
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/*
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*****************************************************************************
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**
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** File : STM32F030F4_FLASH.ld
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**
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** Abstract : Linker script for STM32F030F4 Device with
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** 16KByte FLASH, 4KByte RAM
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**
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** Set heap size, stack size and stack location according
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** to application requirements.
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**
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** Set memory bank area and size if external memory is used.
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**
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** Target : STMicroelectronics STM32
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**
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*****************************************************************************
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*/
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/* Entry Point */
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ENTRY(Reset_Handler)
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/* Highest address of the user mode stack */
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_estack = 0x20001000; /* end of 4K RAM */
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/* Generate a link error if heap and stack don't fit into RAM */
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_Min_Heap_Size = 0; /* required amount of heap */
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_Min_Stack_Size = 0x80; /* required amount of stack */
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/* Specify the memory areas */
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MEMORY
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{
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FLASH (rx) : ORIGIN = 0x08000000, LENGTH = 8K
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RAM (xrw) : ORIGIN = 0x20000000, LENGTH = 4K
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MEMORY_B1 (rx) : ORIGIN = 0x60000000, LENGTH = 0K
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}
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/* Define output sections */
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SECTIONS
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{
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/* The startup code goes first into FLASH */
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.isr_vector :
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{
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. = ALIGN(4);
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KEEP(*(.isr_vector)) /* Startup code */
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. = ALIGN(4);
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} >FLASH
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/* The program code and other data goes into FLASH */
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.text :
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{
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. = ALIGN(4);
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*(.text) /* .text sections (code) */
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*(.text*) /* .text* sections (code) */
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*(.glue_7) /* glue arm to thumb code */
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*(.glue_7t) /* glue thumb to arm code */
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*(.eh_frame)
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KEEP (*(.init))
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KEEP (*(.fini))
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. = ALIGN(4);
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_etext = .; /* define a global symbols at end of code */
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} >FLASH
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/* Constant data goes into FLASH */
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.rodata :
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{
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. = ALIGN(4);
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*(.rodata) /* .rodata sections (constants, strings, etc.) */
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*(.rodata*) /* .rodata* sections (constants, strings, etc.) */
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. = ALIGN(4);
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} >FLASH
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.ARM.extab : { *(.ARM.extab* .gnu.linkonce.armextab.*) } >FLASH
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.ARM : {
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__exidx_start = .;
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*(.ARM.exidx*)
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__exidx_end = .;
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} >FLASH
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.preinit_array :
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{
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PROVIDE_HIDDEN (__preinit_array_start = .);
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KEEP (*(.preinit_array*))
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PROVIDE_HIDDEN (__preinit_array_end = .);
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} >FLASH
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.init_array :
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{
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PROVIDE_HIDDEN (__init_array_start = .);
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KEEP (*(SORT(.init_array.*)))
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KEEP (*(.init_array*))
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PROVIDE_HIDDEN (__init_array_end = .);
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} >FLASH
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.fini_array :
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{
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PROVIDE_HIDDEN (__fini_array_start = .);
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KEEP (*(SORT(.fini_array.*)))
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KEEP (*(.fini_array*))
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PROVIDE_HIDDEN (__fini_array_end = .);
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} >FLASH
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/* used by the startup to initialize data */
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_sidata = LOADADDR(.data);
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/* Initialized data sections goes into RAM, load LMA copy after code */
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.data :
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{
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. = ALIGN(4);
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_sdata = .; /* create a global symbol at data start */
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*(.data) /* .data sections */
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*(.data*) /* .data* sections */
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. = ALIGN(4);
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*(.ramfunctions)
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_edata = .; /* define a global symbol at data end */
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} >RAM AT> FLASH
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/* Uninitialized data section */
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. = ALIGN(4);
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.bss :
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{
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/* This is used by the startup in order to initialize the .bss secion */
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_sbss = .; /* define a global symbol at bss start */
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__bss_start__ = _sbss;
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*(.bss)
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*(.bss*)
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*(COMMON)
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. = ALIGN(4);
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_ebss = .; /* define a global symbol at bss end */
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__bss_end__ = _ebss;
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} >RAM
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/* User_heap_stack section, used to check that there is enough RAM left */
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._user_heap_stack :
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{
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. = ALIGN(4);
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PROVIDE ( end = . );
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PROVIDE ( _end = . );
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. = . + _Min_Heap_Size;
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. = . + _Min_Stack_Size;
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. = ALIGN(4);
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} >RAM
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/* MEMORY_bank1 section, code must be located here explicitly */
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/* Example: extern int foo(void) __attribute__ ((section (".mb1text"))); */
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.memory_b1_text :
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{
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*(.mb1text) /* .mb1text sections (code) */
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*(.mb1text*) /* .mb1text* sections (code) */
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*(.mb1rodata) /* read-only data (constants) */
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*(.mb1rodata*)
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} >MEMORY_B1
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/* Remove information from the standard libraries */
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/DISCARD/ :
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{
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libc.a ( * )
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libm.a ( * )
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libgcc.a ( * )
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}
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.ARM.attributes 0 : { *(.ARM.attributes) }
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}
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@ -0,0 +1,100 @@
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PROJECT = main
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LOCAL_SOURCE_DIR = src
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LOCAL_LIBS =
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BUILD_DIR = build
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CUBE_DIR := /opt/stm32cube/STM32Cube_FW_F0_V1.6.0
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DEBUG := no
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CUBE_DEVICE = STM32F0xx
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H_DEVICE = STM32F030x6
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STARTUP_SOURCE_DIR = $(CUBE_DIR)/Drivers/CMSIS/Device/ST/$(CUBE_DEVICE)/Source/Templates/gcc
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LOCAL_SOURCES = $(wildcard $(LOCAL_SOURCE_DIR)/*.c)
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LOCAL_LIB_SOURCES = $(foreach dir,$(LOCAL_LIBS),$(wildcard $(dir)/*.c))
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STARTUP_SOURCES = $(STARTUP_SOURCE_DIR)/startup_stm32f030x6.s
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ifeq ($(DEBUG),yes)
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DEBUG_FLAGS = -DDEBUG -g3
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endif
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BUILD_NUMBER_FILE = build-number.txt
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BUILD_ID_FLAGS = -Xlinker --defsym -Xlinker __BUILD_DATE=$$(date +'%Y%m%d') \
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-Xlinker --defsym -Xlinker __BUILD_NUMBER=$$(cat $(BUILD_NUMBER_FILE))
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CURRENT_BUILD_CONFIG := $(shell cat makefile | md5sum) DEBUG = $(DEBUG) CUBE_DIR = $(CUBE_DIR)
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LAST_BUILD_CONFIG := $(shell cat $(BUILD_DIR)/build-config.txt)
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CFLAGS = -mcpu=cortex-m0 -mlittle-endian -mthumb -mthumb-interwork -mfloat-abi=soft -Os \
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-fmessage-length=0 -fsigned-char -ffunction-sections -fdata-sections -mlong-calls \
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-Wall -Xlinker --gc-sections -I$(CUBE_DIR)/Drivers/CMSIS/Include \
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-I$(CUBE_DIR)/Drivers/CMSIS/Device/ST/$(CUBE_DEVICE)/Include -D$(H_DEVICE) \
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-Tld/stm32f030f4_flash.ld -Wl,-Map=$(BUILD_DIR)/$(PROJECT).map -std=c99 \
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$(addprefix -I,$(LOCAL_LIBS)) $(DEBUG_FLAGS)
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RM = rm -f
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CC = arm-none-eabi-gcc
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OBJCOPY = arm-none-eabi-objcopy
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SIZE = arm-none-eabi-size
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OBJDUMP = arm-none-eabi-objdump
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LOCAL_OBJECTS = $(patsubst $(LOCAL_SOURCE_DIR)/%.c, $(BUILD_DIR)/%.o, $(LOCAL_SOURCES))
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LOCAL_LIB_OBJECTS = $(addprefix $(BUILD_DIR)/,$(addsuffix .o,$(basename $(notdir $(LOCAL_LIB_SOURCES)))))
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STARTUP_OBJECTS = $(patsubst $(STARTUP_SOURCE_DIR)/%.s, $(BUILD_DIR)/%.o, $(STARTUP_SOURCES))
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OBJECTS = $(LOCAL_OBJECTS) $(LOCAL_LIB_OBJECTS) $(STARTUP_OBJECTS)
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LOCAL_DEPENDS = $(patsubst $(LOCAL_SOURCE_DIR)/%.c, $(BUILD_DIR)/%.d, $(LOCAL_SOURCES))
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.DEFAULT_GOAL = all
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.DELETE_ON_ERROR:
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$(LOCAL_OBJECTS): $(BUILD_DIR)/%.o: $(LOCAL_SOURCE_DIR)/%.c
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$(CC) $< -c -o $@ $(CFLAGS)
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define define_lib_compile_rules
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$(LOCAL_LIB_OBJECTS): $(BUILD_DIR)/%.o: $(1)/%.c
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$$(CC) $$(CFLAGS) -o $$@ -c $$<
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endef
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$(foreach directory,$(LOCAL_LIBS),$(eval $(call define_lib_compile_rules,$(directory))))
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$(STARTUP_OBJECTS): $(BUILD_DIR)/%.o: $(STARTUP_SOURCE_DIR)/%.s
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$(CC) $< -c -o $@ $(CFLAGS)
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$(LOCAL_DEPENDS): $(BUILD_DIR)/%.d: $(LOCAL_SOURCE_DIR)/%.c
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@set -e; rm -f $@; $(CC) -MM $(CFLAGS) $< > $@.$$$$; sed 's,\($*\)\.o[ :]*,build\/\1.o $@ : ,g' < $@.$$$$ > $@; rm -f $@.$$$$
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include $(LOCAL_DEPENDS)
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$(BUILD_DIR)/$(PROJECT).elf: $(OBJECTS) $(BUILD_NUMBER_FILE)
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$(CC) $(OBJECTS) $(CFLAGS) $(BUILD_ID_FLAGS) -o $@
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$(BUILD_DIR)/$(PROJECT).bin: $(BUILD_DIR)/$(PROJECT).elf
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$(OBJCOPY) -O binary -S $< $@
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$(BUILD_DIR):
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if [ ! -d "$(BUILD_DIR)" ]; then mkdir "$(BUILD_DIR)"; fi
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$(BUILD_NUMBER_FILE): $(OBJECTS)
|
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@if ! test -f $(BUILD_NUMBER_FILE); then echo 0 > $(BUILD_NUMBER_FILE); else \
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echo $$(($$(cat $(BUILD_NUMBER_FILE)) + 1)) > $(BUILD_NUMBER_FILE) ; fi
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# Rebuild everything in case of a makefile/configuration change
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.PHONY: all
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ifneq ("$(CURRENT_BUILD_CONFIG)","$(LAST_BUILD_CONFIG)")
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all: clean incrementalbuild
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else
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all: incrementalbuild
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endif
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.PHONY: incrementalbuild
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incrementalbuild: $(BUILD_DIR) $(OBJECTS) $(BUILD_DIR)/$(PROJECT).elf $(BUILD_DIR)/$(PROJECT).bin
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$(SIZE) $(BUILD_DIR)/$(PROJECT).elf
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@echo "$(CURRENT_BUILD_CONFIG)" > $(BUILD_DIR)/build-config.txt
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.PHONY: program
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program: $(BUILD_DIR)/$(PROJECT).bin
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if ps -e | grep openocd ; then arm-none-eabi-gdb -batch -x flash.gdb ; else st-flash --reset write $(BUILD_DIR)/$(PROJECT).bin 0x8000000 ; fi
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|
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.PHONY: clean
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clean:
|
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$(RM) $(BUILD_DIR)/*
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|
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@ -0,0 +1,10 @@
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#ifndef BUILDID_H_
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#define BUILDID_H_
|
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|
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extern char __BUILD_DATE;
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extern char __BUILD_NUMBER;
|
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|
||||
#define BUILD_DATE ((uint32_t)&__BUILD_DATE)
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#define BUILD_NUMBER ((uint32_t)&__BUILD_NUMBER)
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|
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#endif
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@ -0,0 +1,125 @@
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#include "main.h"
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|
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#define SCARCITY 900
|
||||
|
||||
volatile uint16_t ADC_Reading;
|
||||
|
||||
int main(void)
|
||||
{
|
||||
RCC->AHBENR |= RCC_AHBENR_GPIOAEN;
|
||||
RCC->AHBENR |= RCC_AHBENR_GPIOBEN;
|
||||
RCC->AHBENR |= RCC_AHBENR_GPIOFEN;
|
||||
RCC->APB1ENR |= RCC_APB1ENR_TIM14EN;
|
||||
|
||||
GPIOA->PUPDR |= (1 << (PIN_DIP_1 << 1)) | (1 << (PIN_DIP_2 << 1)) | (1 << (PIN_DIP_3 << 1)) | (1 << (PIN_DIP_4 << 1));
|
||||
|
||||
LED_Init();
|
||||
ADC_Init();
|
||||
|
||||
for(int i = 0; i < LED_COUNT; i++)
|
||||
{
|
||||
}
|
||||
|
||||
TIM14->PSC = 10000;
|
||||
TIM14->ARR = 100;
|
||||
TIM14->CNT = 0;
|
||||
TIM14->DIER = TIM_DIER_UIE;
|
||||
NVIC_EnableIRQ(TIM14_IRQn);
|
||||
TIM14->CR1 = TIM_CR1_ARPE | TIM_CR1_CEN;
|
||||
|
||||
for(;;);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
void ADC_Init(void)
|
||||
{
|
||||
RCC->APB2ENR |= RCC_APB2ENR_ADCEN;
|
||||
|
||||
ADC1->CFGR1 = ADC_CFGR1_CONT | ADC_CFGR1_OVRMOD;
|
||||
ADC1->SMPR = 1;
|
||||
ADC1->CHSELR = ADC_CHSELR_CHSEL0;
|
||||
|
||||
// // ADC Calibration
|
||||
// ADC1->CR |= ADC_CR_ADDIS;
|
||||
// while(ADC1->CR & ADC_CR_ADEN);
|
||||
// ADC1->CR |= ADC_CR_ADCAL;
|
||||
// while(ADC1->CR & ADC_CR_ADCAL);
|
||||
|
||||
// Enable interrupt
|
||||
ADC1->IER = ADC_IER_EOCIE;
|
||||
NVIC_EnableIRQ(ADC1_IRQn);
|
||||
|
||||
// Enable the ADC
|
||||
ADC1->CR |= ADC_CR_ADEN;
|
||||
while(~ADC1->ISR & ADC_ISR_ADRDY);
|
||||
|
||||
// GPIO configuration
|
||||
GPIOA->MODER |= (3 << (PIN_SENSOR << 1));
|
||||
GPIOA->PUPDR |= (1 << (PIN_SENSOR << 1));
|
||||
|
||||
// And start the first conversion
|
||||
ADC1->CR |= ADC_CR_ADSTART;
|
||||
}
|
||||
|
||||
bool IsOn(void)
|
||||
{
|
||||
// Always on?
|
||||
if(~GPIOA->IDR & (1 << PIN_DIP_1))
|
||||
return true;
|
||||
// No -> check if it's dark
|
||||
return ADC_Reading > 240;
|
||||
|
||||
}
|
||||
|
||||
uint32_t GetFactor(void)
|
||||
{
|
||||
uint8_t setting = 0;
|
||||
if(~GPIOA->IDR & (1 << PIN_DIP_4))
|
||||
setting |= 1;
|
||||
if(~GPIOA->IDR & (1 << PIN_DIP_3))
|
||||
setting |= 2;
|
||||
if(~GPIOA->IDR & (1 << PIN_DIP_2))
|
||||
setting |= 4;
|
||||
return 1 << setting;
|
||||
}
|
||||
|
||||
void TIM14_IRQHandler(void)
|
||||
{
|
||||
if(TIM14->SR & TIM_SR_UIF)
|
||||
{
|
||||
uint32_t threshold = RAND_MAX / LED_COUNT / SCARCITY * GetFactor();
|
||||
if(!IsOn())
|
||||
threshold = 0;
|
||||
|
||||
for(unsigned int i = 0; i < LED_COUNT; i++)
|
||||
{
|
||||
if(rand() < threshold)
|
||||
LED_Buffer[i].R = 255;
|
||||
else
|
||||
LED_Buffer[i].R = 0;
|
||||
|
||||
if(rand() < threshold)
|
||||
LED_Buffer[i].G = 255;
|
||||
else
|
||||
LED_Buffer[i].G = 0;
|
||||
|
||||
if(rand() < threshold)
|
||||
LED_Buffer[i].B = 255;
|
||||
else
|
||||
LED_Buffer[i].B = 0;
|
||||
}
|
||||
|
||||
LED_Refresh();
|
||||
|
||||
TIM14->SR &= ~TIM_SR_UIF;
|
||||
}
|
||||
NVIC_ClearPendingIRQ(TIM14_IRQn);
|
||||
}
|
||||
|
||||
void ADC1_IRQHandler(void)
|
||||
{
|
||||
ADC_Reading = ADC1->DR;
|
||||
ADC1->ISR |= ADC_ISR_EOC;
|
||||
NVIC_ClearPendingIRQ(ADC1_IRQn);
|
||||
}
|
||||
|
|
@ -0,0 +1,17 @@
|
|||
#ifndef MAIN_H_
|
||||
#define MAIN_H_
|
||||
|
||||
#include <stdlib.h>
|
||||
#include <stdbool.h>
|
||||
#include "stm32f030x6.h"
|
||||
#include "pinning.h"
|
||||
#include "buildid.h"
|
||||
#include "ws2812b_spi.h"
|
||||
|
||||
int main(void);
|
||||
void ADC_Init(void);
|
||||
|
||||
void TIM14_IRQHandler(void);
|
||||
void ADC1_IRQHandler(void);
|
||||
|
||||
#endif
|
||||
|
|
@ -0,0 +1,10 @@
|
|||
#ifndef PINNING_H_
|
||||
#define PINNING_H_
|
||||
|
||||
#define PIN_SENSOR 0 // PA0 - light sensor
|
||||
#define PIN_DIP_1 4 // PA1 - DIP switch 1
|
||||
#define PIN_DIP_2 3 // PA2 - DIP switch 2
|
||||
#define PIN_DIP_3 2 // PA3 - DIP switch 3
|
||||
#define PIN_DIP_4 1 // PA4 - DIP switch 4
|
||||
|
||||
#endif
|
||||
|
|
@ -0,0 +1,23 @@
|
|||
#include <stdint.h>
|
||||
#include "stm32f030x6.h"
|
||||
|
||||
void SystemInit(void)
|
||||
{
|
||||
// Activate HSI and wait for it to be ready
|
||||
RCC->CR = RCC_CR_HSION;
|
||||
while(!(RCC->CR & RCC_CR_HSIRDY));
|
||||
|
||||
// Set PLL to x10 (-> 40MHz system clock)
|
||||
RCC->CFGR = RCC_CFGR_PLLMUL_3;
|
||||
|
||||
// Activate PLL and wait
|
||||
RCC->CR |= RCC_CR_PLLON;
|
||||
while(!(RCC->CR & RCC_CR_PLLRDY));
|
||||
|
||||
// Select PLL as clock source
|
||||
RCC->CFGR |= RCC_CFGR_SW_1;
|
||||
|
||||
// Disable all interrupts
|
||||
RCC->CIR = 0x00000000;
|
||||
}
|
||||
|
||||
|
|
@ -0,0 +1,58 @@
|
|||
#include "ws2812b_spi.h"
|
||||
|
||||
volatile LED_Color_t LED_Buffer[LED_COUNT];
|
||||
volatile uint8_t LED_DMABuffer[LED_DMA_BYTES + 1];
|
||||
#ifndef LED_INVERT_DO
|
||||
const static uint8_t LED_PatternTable[4] = {0b100100, 0b100110, 0b110100, 0b110110};
|
||||
#else
|
||||
const static uint8_t LED_PatternTable[4] = {0b011011, 0b011001, 0b001011, 0b001001};
|
||||
#endif
|
||||
|
||||
void LED_Init(void)
|
||||
{
|
||||
RCC->AHBENR |= RCC_AHBENR_GPIOAEN;
|
||||
RCC->AHBENR |= RCC_AHBENR_DMAEN;
|
||||
RCC->APB2ENR |= RCC_APB2ENR_SPI1EN;
|
||||
|
||||
// GPIO initialisation
|
||||
GPIOA->MODER |= (2 << (LED_PIN_DO << 1));
|
||||
|
||||
// SPI initialisation
|
||||
SPI1->CR1 = SPI_CR1_BIDIMODE | SPI_CR1_BIDIOE |\
|
||||
SPI_CR1_BR_1 | SPI_CR1_BR_0 | SPI_CR1_MSTR;
|
||||
SPI1->CR2 = SPI_CR2_DS_2 | SPI_CR2_DS_0 | SPI_CR2_FRF;
|
||||
|
||||
// DMA configuration (DMA channel 3 is used)
|
||||
DMA1_Channel3->CCR = DMA_CCR_PL_1 | DMA_CCR_MINC | DMA_CCR_DIR;
|
||||
DMA1_Channel3->CPAR = (uint32_t)(&SPI1->DR);
|
||||
SPI1->CR2 |= SPI_CR2_TXDMAEN;
|
||||
|
||||
// Enable SPI
|
||||
SPI1->CR1 |= SPI_CR1_SPE;
|
||||
}
|
||||
|
||||
static inline void LED_StartDMA(void)
|
||||
{
|
||||
DMA1_Channel3->CCR &= ~DMA_CCR_EN;
|
||||
DMA1_Channel3->CNDTR = LED_DMA_BYTES + 1;
|
||||
DMA1_Channel3->CMAR = (uint32_t)(&LED_DMABuffer);
|
||||
DMA1_Channel3->CCR |= DMA_CCR_EN;
|
||||
}
|
||||
|
||||
void LED_Refresh(void)
|
||||
{
|
||||
for(unsigned int i = 0; i < LED_DMA_BYTES; i++)
|
||||
{
|
||||
unsigned int byteindex = i / 4;
|
||||
uint8_t bitindex = 6 - (i - 4 * byteindex) * 2;
|
||||
uint8_t bitmask = 3 << bitindex;
|
||||
uint8_t *byte = (uint8_t*)LED_Buffer + byteindex;
|
||||
LED_DMABuffer[i + 1] = LED_PatternTable[(*byte & bitmask) >> bitindex];
|
||||
}
|
||||
#ifdef LED_INVERT_DO
|
||||
LED_DMABuffer[0] = 0xff;
|
||||
#else
|
||||
LED_DMABuffer[0] = 0;
|
||||
#endif
|
||||
LED_StartDMA();
|
||||
}
|
||||
|
|
@ -0,0 +1,31 @@
|
|||
#ifndef WS2812B_SPI_H
|
||||
#define WS2812B_SPI_H
|
||||
|
||||
#include "stm32f030x6.h"
|
||||
#include "pinning.h"
|
||||
|
||||
// The WS2812B data line has to be connected to PA7 (SPI MOSI). Unfortunately,
|
||||
// there is only one SPI interface, so this library cannot be used together with
|
||||
// an SD card.
|
||||
#define LED_PIN_DO 7
|
||||
|
||||
|
||||
// The number of LEDs daisy-chained
|
||||
#define LED_COUNT 120
|
||||
|
||||
// Invert the output (if a transistor is used for level-shifting)
|
||||
#define LED_INVERT_DO
|
||||
|
||||
#define LED_DMA_BYTES (LED_COUNT * 3 * 4)
|
||||
|
||||
typedef struct
|
||||
{
|
||||
uint8_t G, R, B;
|
||||
} LED_Color_t;
|
||||
|
||||
extern volatile LED_Color_t LED_Buffer[LED_COUNT];
|
||||
|
||||
void LED_Init(void);
|
||||
void LED_Refresh(void);
|
||||
|
||||
#endif
|
||||
Loading…
Reference in New Issue