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This commit is contained in:
Edward Emelianov 2022-02-12 01:44:51 +03:00
parent 8f9e80afa9
commit 9c3632b755
1 changed files with 0 additions and 32 deletions
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32
F303-nolib/floatPrintf/main.c
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@ -20,41 +20,12 @@
#include "hardware.h"
#include "usart.h"
//#include <arm_math.h>
volatile uint32_t Tms = 0;
void sys_tick_handler(void){
++Tms;
}
# define IEEE_754_FLOAT_MANTISSA_BITS (23)
# define IEEE_754_FLOAT_EXPONENT_BITS (8)
# define IEEE_754_FLOAT_SIGN_BITS (1)
# if (IS_BIG_ENDIAN == 1)
typedef union {
float value;
struct {
__int8_t sign : IEEE_754_FLOAT_SIGN_BITS;
__int8_t exponent : IEEE_754_FLOAT_EXPONENT_BITS;
__uint32_t mantissa : IEEE_754_FLOAT_MANTISSA_BITS;
};
} IEEE_754_float;
# else
typedef union {
float value;
struct {
__uint32_t mantissa : IEEE_754_FLOAT_MANTISSA_BITS;
__int8_t exponent : IEEE_754_FLOAT_EXPONENT_BITS;
__int8_t sign : IEEE_754_FLOAT_SIGN_BITS;
};
} IEEE_754_float;
# endif
#define P(x) usart_putchar(x)
#define S(x) usart_send(x)
// be careful: if pow10 would be bigger you should change str[] size!
static const float pwr10[] = {1., 10., 100., 1000., 10000.};
static const float rounds[] = {0.5, 0.05, 0.005, 0.0005, 0.00005};
@ -132,14 +103,11 @@ int main(void){
float x = 0.519, more = 5.123;
while(1){
if(Tms - ctr > 499){
//usart_send("ping\n");
ctr = Tms;
pin_toggle(GPIOB, 1 << 1 | 1 << 0); // toggle LED @ PB0
/**/
if((x += 0.519) > more){
//usart_send("MORE!\n");
more += 5.123;
//__get_FPSCR();
}
}
if(bufovr){