mirror of
https://github.com/NanjingForestryUniversity/valveboard.git
synced 2025-11-09 14:54:12 +00:00
90 lines
2.8 KiB
C
90 lines
2.8 KiB
C
#include "valve.h"
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uint8_t waiting_send = 0;
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uint8_t sending = 0;
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uint8_t period = 0;
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uint8_t *valve_data = 0;
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void VALVE_Init()
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{
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VALVE_TIM_PERIPHERAL_FUNC(VALVE_TIM_PERIPHERAL, ENABLE);
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VALVE_GPIO_PERIPHERAL_FUNC(VALVE_SCLK_PERIPHERAL | VALVE_SEN_PERIPHERAL | VALVE_SDATA_PERIPHERAL, ENABLE);
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NVIC_InitTypeDef NVIC_InitStructure;
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GPIO_InitTypeDef GPIO_InitStructure;
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TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStructure;
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
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GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
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GPIO_InitStructure.GPIO_Pin = VALVE_SCLK_PIN;
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GPIO_Init(VALVE_SCLK_PORT, &GPIO_InitStructure);
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GPIO_InitStructure.GPIO_Pin = VALVE_SEN_PIN;
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GPIO_ResetBits(VALVE_SEN_PORT, VALVE_SEN_PIN);
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GPIO_Init(VALVE_SEN_PORT, &GPIO_InitStructure);
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GPIO_InitStructure.GPIO_Pin = VALVE_SDATA_PIN;
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GPIO_Init(VALVE_SDATA_PORT, &GPIO_InitStructure);
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TIM_TimeBaseInitStructure.TIM_ClockDivision = TIM_CKD_DIV1;
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TIM_TimeBaseInitStructure.TIM_CounterMode = TIM_CounterMode_Up;
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TIM_TimeBaseInitStructure.TIM_Period = 18000 - 1;
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TIM_TimeBaseInitStructure.TIM_Prescaler = 1 - 1;
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NVIC_InitStructure.NVIC_IRQChannel = VALVE_TIME_IRQN;
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NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
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NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
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NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
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NVIC_Init(&NVIC_InitStructure);
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TIM_TimeBaseInit(VALVE_TIM, &TIM_TimeBaseInitStructure);
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TIM_ClearFlag(VALVE_TIM, TIM_IT_Update);
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TIM_ITConfig(VALVE_TIM, TIM_IT_Update, ENABLE);
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TIM_Cmd(VALVE_TIM, ENABLE);
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}
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ErrorStatus VALVE_Send(uint8_t *valveData)
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{
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int timeout = VALVE_COMMUNICATION_TIMEOUT;
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while (sending && --timeout)
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;
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if (timeout == 0)
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return ERROR;
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waiting_send = 1;
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valve_data = valveData;
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return SUCCESS;
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}
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void VALVE_TIM_IRQHANDLER()
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{
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static uint8_t current_channel = 0;
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if (VALVE_TIM->SR & TIM_IT_Update)
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{
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if (period == 0)
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VALVE_SCLK_PORT->BSRR = VALVE_SCLK_PIN;
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else if (period == 2)
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{
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VALVE_SCLK_PORT->BRR = VALVE_SCLK_PIN;
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if (waiting_send)
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{
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current_channel = 0;
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VALVE_SEN_PORT->BSRR = VALVE_SEN_PIN;
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waiting_send = 0;
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sending = 1;
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}
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if (current_channel == VALVE_CHANNEL_NUM)
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{
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sending = 0;
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VALVE_SEN_PORT->BRR = VALVE_SEN_PIN;
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}
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}
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else if (period == 3 && sending == 1)
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{
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uint32_t tmpreg = VALVE_SDATA_PORT->ODR & ~VALVE_SDATA_PIN;
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VALVE_SDATA_PORT->ODR = tmpreg | (uint16_t)(!valve_data[current_channel] * VALVE_SDATA_PIN);
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current_channel += 1;
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}
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period++;
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period %= 4;
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VALVE_TIM->SR &= ~TIM_IT_Update;
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}
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}
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