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#include "SWM221.h"
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#include "CircleBuffer.h"
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CircleBuffer_t CirBuf;
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#define ADC_SIZE 250 // ADC 最多连续转换 256 次
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uint16_t ADC_Result[ADC_SIZE] = {0};
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void SerialInit(void);
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int main(void)
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{
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DMA_InitStructure DMA_initStruct;
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ADC_InitStructure ADC_initStruct;
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ADC_SEQ_InitStructure ADC_SEQ_initStruct;
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SystemInit();
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SerialInit();
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PORT_Init(PORTA, PIN14, PORTA_PIN14_ADC0_CH0, 0); //PA.14 => ADC0.CH0
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PORT_Init(PORTA, PIN11, PORTA_PIN11_ADC0_CH1, 0); //PA.11 => ADC0.CH1，注意：此通道只在 ADC 参考源为 ADC_REF_VDD 时可用
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PORT_Init(PORTA, PIN8, PORTA_PIN8_ADC0_CH2, 0); //PA.8 => ADC0.CH2
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PORT_Init(PORTB, PIN6, PORTB_PIN6_ADC0_CH5, 0); //PB.6 => ADC0.CH5
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PORT_Init(PORTB, PIN5, PORTB_PIN5_ADC0_CH6, 0); //PB.5 => ADC0.CH6
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PORT_Init(PORTB, PIN4, PORTB_PIN4_ADC0_CH7, 0); //PB.4 => ADC0.CH7
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PORT_Init(PORTB, PIN2, PORTB_PIN2_ADC0_CH8, 0); //PB.2 => ADC0.CH8
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ADC_initStruct.clkdiv = 3;
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ADC_initStruct.refsrc = ADC_REF_VDD;
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ADC_initStruct.samplAvg = ADC_AVG_SAMPLE1;
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ADC_Init(ADC0, &ADC_initStruct);
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ADC_SEQ_initStruct.trig_src = ADC_TRIGGER_SW;
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ADC_SEQ_initStruct.samp_tim = 6;
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ADC_SEQ_initStruct.conv_cnt = ADC_SIZE;
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ADC_SEQ_initStruct.EOCIntEn = 0;
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ADC_SEQ_initStruct.channels = (uint8_t []){ ADC_CH0, 0xF };
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ADC_SEQ_Init(ADC0, ADC_SEQ1, &ADC_SEQ_initStruct);
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ADC0->CR |= (1 << ADC_CR_SEQ1DMAEN_Pos);
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ADC_Open(ADC0);
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DMA_initStruct.Mode = DMA_MODE_CIRCLE;
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DMA_initStruct.Unit = DMA_UNIT_HALFWORD;
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DMA_initStruct.Count = ADC_SIZE;
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DMA_initStruct.PeripheralAddr = (uint32_t)&ADC0->SEQ1DMA;
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DMA_initStruct.PeripheralAddrInc = 0;
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DMA_initStruct.MemoryAddr = (uint32_t)ADC_Result;
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DMA_initStruct.MemoryAddrInc = 1;
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DMA_initStruct.Handshake = DMA_CH0_ADC0SEQ1;
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DMA_initStruct.Priority = DMA_PRI_LOW;
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DMA_initStruct.INTEn = DMA_IT_HALF | DMA_IT_DONE;
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DMA_CH_Init(DMA_CH0, &DMA_initStruct);
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DMA_CH_Open(DMA_CH0);
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ADC_Start(ADC_SEQ1, 0);
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while(1==1)
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{
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while(CirBuf_Full(&CirBuf) == 0) __NOP();
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for(int i = 0; i < 2000; i++)
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{
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uint16_t data;
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CirBuf_Read(&CirBuf, &data, 1);
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printf("%4d,", data & ADC_SEQ1DMA_DATA_Msk);
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}
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CirBuf_Clear(&CirBuf); // 打印过程中存入 CirBuf 中的数据来自不连续的点
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}
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}
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void GPIOB1_GPIOA9_DMA_Handler(void)
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{
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if(DMA_CH_INTStat(DMA_CH0, DMA_IT_HALF))
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{
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DMA_CH_INTClr(DMA_CH0, DMA_IT_HALF);
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CirBuf_Write(&CirBuf, &ADC_Result[0], ADC_SIZE/2);
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}
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else if(DMA_CH_INTStat(DMA_CH0, DMA_IT_DONE))
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{
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DMA_CH_INTClr(DMA_CH0, DMA_IT_DONE);
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ADC_Start(ADC_SEQ1, 0); // 转换 250 次后停止，需重新启动
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CirBuf_Write(&CirBuf, &ADC_Result[ADC_SIZE/2], ADC_SIZE - ADC_SIZE/2);
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}
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}
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void SerialInit(void)
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{
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UART_InitStructure UART_initStruct;
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PORT_Init(PORTA, PIN0, PORTA_PIN0_UART0_RX, 1); //GPIOA.0配置为UART0 RXD
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PORT_Init(PORTA, PIN1, PORTA_PIN1_UART0_TX, 0); //GPIOA.1配置为UART0 TXD
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UART_initStruct.Baudrate = 57600;
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UART_initStruct.DataBits = UART_DATA_8BIT;
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UART_initStruct.Parity = UART_PARITY_NONE;
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UART_initStruct.StopBits = UART_STOP_1BIT;
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UART_initStruct.RXThreshold = 3;
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UART_initStruct.RXThresholdIEn = 0;
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UART_initStruct.TXThreshold = 3;
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UART_initStruct.TXThresholdIEn = 0;
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UART_initStruct.TimeoutTime = 10;
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UART_initStruct.TimeoutIEn = 0;
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UART_Init(UART0, &UART_initStruct);
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UART_Open(UART0);
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}
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/******************************************************************************************************************************************
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* 函数名称: fputc()
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* 功能说明: printf()使用此函数完成实际的串口打印动作
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* 输 入: int ch 要打印的字符
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* FILE *f 文件句柄
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* 输 出: 无
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* 注意事项: 无
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******************************************************************************************************************************************/
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int fputc(int ch, FILE *f)
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{
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UART_WriteByte(UART0, ch);
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while(UART_IsTXBusy(UART0));
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return ch;
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}
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