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This commit is contained in:
Andreas Mieke 2018-03-18 23:43:59 +01:00
parent 4093cd295f
commit dc99dcf6e8
41 changed files with 1775 additions and 19 deletions
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42
Mieke/SW/MT/piezo.c Normal file
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#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;
}