Mayan dikit2 dah ngerti kalau buat debug yg codenya keluar assembler doang.
Program berikut cuma blink led setiap 500ms. Beberapa address masih di hard code (bad programming).
/* Includes */
#include
#include "stm32f10x.h"
/* define compiler specific symbols */
#if defined ( __CC_ARM )
#define __ASM __asm /*!< asm keyword for ARM Compiler */
#define __INLINE __inline /*!< inline keyword for ARM Compiler */
#elif defined ( __ICCARM__ )
#define __ASM __asm /*!< asm keyword for IAR Compiler */
#define __INLINE inline /*!< inline keyword for IAR Compiler. Only avaiable in High optimization mode! */
#elif defined ( __GNUC__ )
#define __ASM __asm /*!< asm keyword for GNU Compiler */
#define __INLINE inline /*!< inline keyword for GNU Compiler */
#elif defined ( __TASKING__ )
#define __ASM __asm /*!< asm keyword for TASKING Compiler */
#define __INLINE inline /*!< inline keyword for TASKING Compiler */
#endif
__IO uint32_t TimingDelay;
void Delay(__IO u32 time)
{
TimingDelay = time;
while(TimingDelay!=0);
}
void TimingDelay_Decrement(void)
{
if (TimingDelay != 0x00)
{
TimingDelay--;
}
}
inline void ledLoop(void)
{
__ASM volatile("ldr r1,=0x40011000\n\t" //load GPIOC address
"ldr r2,=0x100\n\t" //load Pin_8
"ledloop:"
"str r2,[r1,#0x10]\n\t" //set GPIOC->BSRR = Pin_8
"ldr r0,=500\n\t" //set Delay argument, time = 500ms
"bl Delay\n\t" //call function Delay
"ldr r2,=0x100\n\t" //load Pin_8
"str r2,[r1,#0x14]\n\t" //set GPIOC->BRR = Pin_8
"ldr r0,=500\n\t" //set Delay argument, time = 500ms
"bl Delay\n\t" //call function Delay
"bl ledloop\n\t" //goto to label ledloop and never return
:::"r0", "r1","r2", "cc", "memory");
}
inline int addition(int val1, int val2)
{
int temp;
__ASM volatile(
"add %[result],%[val1],%[val2]\n\t" //result = val1+val3
"mov r2,#100\n\t" //set loop count = 100
"loopi1:\n\t"
"add %[result],%[result],#1\n\t" //result = result+1
"subs r2,r2,#1\n\t" //decrement loopcoount
"bne loopi1\n\t" //if not zero then keep looping
:[result]"=r" (temp)
:[val1]"r" (val1), [val2]"r" (val2)
: "r2", "cc"
);
return temp;
}
/**
**===========================================================================
**
** Abstract: main program
**
**===========================================================================
*/
int main(void)
{
int newval=0;
/* GPIOC clock enable */
GPIO_InitTypeDef GPIO_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE);
newval = addition(1,5);
/* Enable green led PC9 and blue led PC8 */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8 | GPIO_Pin_9;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOC, &GPIO_InitStructure);
if (SysTick_Config(SystemCoreClock / 1000))
{
/* Capture error */
while (1);
}
ledLoop();
/* Infinite loop */
while (1)
{
}
}
#ifdef USE_FULL_ASSERT
/**
* @brief Reports the name of the source file and the source line number
* where the assert_param error has occurred.
* @param file: pointer to the source file name
* @param line: assert_param error line source number
* @retval None
*/
void assert_failed(uint8_t* file, uint32_t line)
{
/* User can add his own implementation to report the file name and line number,
ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
/* Infinite loop */
while (1)
{
}
}
#endif
/*
* Minimal __assert_func used by the assert() macro
* */
void __assert_func(const char *file, int line, const char *func, const char *failedexpr)
{
while(1)
{}
}
/*
* Minimal __assert() uses __assert__func()
* */
void __assert(const char *file, int line, const char *failedexpr)
{
__assert_func (file, line, NULL, failedexpr);
}
