mirror of
https://github.com/EranMorkon/AMTS.git
synced 2023-12-28 16:48:38 +00:00
43 lines
801 B
C
43 lines
801 B
C
#include "piezo.h"
|
|
|
|
volatile uint32_t *PiezoSTick, PiezoSTickCur, Freq;
|
|
|
|
void init_piezo(volatile uint32_t *SysTickCnt)
|
|
{
|
|
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);
|
|
|
|
GPIO_InitTypeDef gpio;
|
|
GPIO_StructInit(&gpio);
|
|
|
|
gpio.GPIO_Mode = GPIO_Mode_Out_PP;
|
|
gpio.GPIO_Pin = GPIO_Pin_0;
|
|
GPIO_Init(GPIOB, &gpio);
|
|
|
|
PiezoSTick = SysTickCnt;
|
|
return;
|
|
}
|
|
|
|
void run_piezo()
|
|
{
|
|
uint8_t pstate = 0x0;
|
|
PiezoSTickCur = *PiezoSTick;
|
|
while((*PiezoSTick - PiezoSTickCur) <= 1000)
|
|
{
|
|
Freq = *PiezoSTick;
|
|
while((*PiezoSTick - Freq) <= 1);
|
|
if (pstate) {
|
|
pstate = ~pstate;
|
|
GPIO_WriteBit(GPIOB, GPIO_Pin_0, Bit_SET);
|
|
} else {
|
|
pstate = ~pstate;
|
|
GPIO_WriteBit(GPIOB, GPIO_Pin_0, Bit_RESET);
|
|
}
|
|
}
|
|
return;
|
|
}
|
|
|
|
void deinit_piezo(void)
|
|
{
|
|
return;
|
|
}
|