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67 lines
1.7 KiB
C
67 lines
1.7 KiB
C
/*
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Manufacturing tests for the new cortex minimal system
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Copyright (C) 2018 Andreas Mieke
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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#include "piezo.h"
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volatile uint32_t *PiezoSTick, PiezoSTickCur, Freq;
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void init_piezo(volatile uint32_t *SysTickCnt)
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{
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// Enable GPIOB clock
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RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);
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// Create gpio struct and fill it with default values
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GPIO_InitTypeDef gpio;
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GPIO_StructInit(&gpio);
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// Set PB0 to output push pull
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gpio.GPIO_Mode = GPIO_Mode_Out_PP;
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gpio.GPIO_Pin = GPIO_Pin_0;
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GPIO_Init(GPIOB, &gpio);
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PiezoSTick = SysTickCnt;
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return;
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}
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void run_piezo()
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{
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uint8_t pstate = 0x0;
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PiezoSTickCur = *PiezoSTick;
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// Run for one second
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while((*PiezoSTick - PiezoSTickCur) <= 1000)
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{
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Freq = *PiezoSTick;
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// Wait for 1 millisecond
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while((*PiezoSTick - Freq) <= 1);
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// Toggle output
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if (pstate) {
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pstate = ~pstate;
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GPIO_WriteBit(GPIOB, GPIO_Pin_0, Bit_SET);
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} else {
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pstate = ~pstate;
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GPIO_WriteBit(GPIOB, GPIO_Pin_0, Bit_RESET);
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}
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}
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return;
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}
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void deinit_piezo(void)
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{
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return;
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}
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