81 lines
2.4 KiB
C++
81 lines
2.4 KiB
C++
#include "board.h"
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#include "mik32_hal_pcc.h"
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#include "mik32_hal_irq.h"
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#include "Arduino.h"
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// --------------------- flash cache limit --------------------- //
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#include "mcu32_memory_map.h"
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#include "mik32_hal_spifi_w25.h"
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// define board flash size
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#if defined(ARDUINO_START_MIK32_V1)
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#define FLASH_SIZE 0x00400000 // 4 Mb
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#elif defined(ARDUINO_ACE_UNO_16MB)
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#define FLASH_SIZE 0x01000000 // 16 Mb
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#elif defined(ARDUINO_ACE_UNO_32MB)
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#define FLASH_SIZE 0x02000000 // 32 Mb
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#else
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#define FLASH_SIZE 0x00800000 // 8 Mb
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#endif
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// define margin from flash end
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#define FLASH_END_OFFSET 0x1000
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// values from ld script
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extern uint8_t __RODATA__[];
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// RAM-function for updating flash cache limit by app size to improve performance
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__attribute__((section(".ram_text"))) void updateCacheLimit(void)
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{
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uint32_t new_limit = (uintptr_t)__RODATA__ - SPIFI_BASE_ADDRESS;
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// limit cache size by flash size with margin
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if (new_limit > (FLASH_SIZE - FLASH_END_OFFSET))
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new_limit = FLASH_SIZE - FLASH_END_OFFSET;
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uint32_t MCMDbackup = SPIFI_CONFIG->MCMD; // save current value from MCMD
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SPIFI_CONFIG->STAT |= SPIFI_CONFIG_STAT_RESET_M; // reset MCMD mode for writing new CLIMIT
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SPIFI_CONFIG->CLIMIT = new_limit; // set new CLIMIT
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SPIFI_CONFIG->MCMD = MCMDbackup; // restore MCMD value
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}
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// --------------------- init --------------------- //
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// called from crt0.S before constructors initialization
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extern "C" void SystemInit(void)
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{
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// set irq vector to ram region
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write_csr(mtvec, 0x02000000);
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HAL_Init();
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// gpio clock
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__HAL_PCC_GPIO_0_CLK_ENABLE();
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__HAL_PCC_GPIO_1_CLK_ENABLE();
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__HAL_PCC_GPIO_2_CLK_ENABLE();
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__HAL_PCC_GPIO_IRQ_CLK_ENABLE();
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// for delays
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SysTick_Init();
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// update flash cache limit by app size
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updateCacheLimit();
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}
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// called after setup()
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void post_init(void)
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{
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if(isInterruptsEnabled()) // if user has called noInterrupts() in setup(), this value is false
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interrupts(); // enable global interrupts
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}
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// --------------------- other --------------------- //
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volatile bool use_error_messages = true;
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// print error message to Serial
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extern "C" void ErrorMsgHandler(const char * msg)
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{
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// function works if Serial is used in sketch and user doesn't turn it off
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#ifdef HardwareSerial_h
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if(use_error_messages&&Serial)
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Serial.println(msg);
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#endif
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}
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