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Настройка размера кеша у микросхемы flash-памяти по размеру прошивки

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Co-authored-by: KLASSENTS <klassen@elron.tech>
Co-committed-by: KLASSENTS <klassen@elron.tech>
This commit is contained in:
KLASSENTS 2025-05-30 07:49:19 +03:00 committed by klassents
parent 2cb29ab673
commit 5acf627e2c
2 changed files with 38 additions and 3 deletions
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37
cores/arduino/board.cpp
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@ -3,6 +3,41 @@
#include "mik32_hal_irq.h" #include "mik32_hal_irq.h"
#include "Arduino.h" #include "Arduino.h"
// --------------------- flash cache limit --------------------- //
#include "mcu32_memory_map.h"
#include "mik32_hal_spifi_w25.h"
// define board flash size
#if defined(ARDUINO_START_MIK32_V1)
#define FLASH_SIZE 0x00400000 // 4 Mb
#elif defined(ARDUINO_ACE_UNO_16MB)
#define FLASH_SIZE 0x01000000 // 16 Mb
#elif defined(ARDUINO_ACE_UNO_32MB)
#define FLASH_SIZE 0x02000000 // 32 Mb
#else
#define FLASH_SIZE 0x00800000 // 8 Mb
#endif
// define margin from flash end
#define FLASH_END_OFFSET 0x1000
// values from ld script
extern uint8_t __TEXT_START__[];
extern uint8_t __TEXT_END__[];
// RAM-function for updating flash cache limit by app size to improve performance
__attribute__((section(".ram_text"))) void updateCacheLimit(void)
{
uint32_t new_limit = (uintptr_t)__TEXT_END__ - (uintptr_t)__TEXT_START__ + 128; // 128 byte for margin
// limit cache size by flash size with margin
if (new_limit > (FLASH_SIZE - FLASH_END_OFFSET))
new_limit = FLASH_SIZE - FLASH_END_OFFSET;
uint32_t MCMDbackup = SPIFI_CONFIG->MCMD; // save current value from MCMD
SPIFI_CONFIG->STAT |= SPIFI_CONFIG_STAT_RESET_M; // reset MCMD mode for writing new CLIMIT
SPIFI_CONFIG->CLIMIT = new_limit; // set new CLIMIT
SPIFI_CONFIG->MCMD = MCMDbackup; // restore MCMD value
}
// --------------------- init --------------------- // // --------------------- init --------------------- //
// called from crt0.S before constructors initialization // called from crt0.S before constructors initialization
extern "C" void SystemInit(void) extern "C" void SystemInit(void)
@ -20,6 +55,8 @@ extern "C" void SystemInit(void)
// for delays // for delays
SysTick_Init(); SysTick_Init();
// update flash cache limit by app size
updateCacheLimit();
} }
// called after setup() // called after setup()

2
cores/arduino/main.cpp
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@ -19,5 +19,3 @@ int main()
loop(); loop();
} }
} }