#include "SWM221.h"


void SerialInit(void);

int main(void)
{
	ADC_InitStructure ADC_initStruct;
	ADC_SEQ_InitStructure ADC_SEQ_initStruct;
	
	SystemInit();
	
	SerialInit();
	
	/* 使能温度传感器，温度传感器连接 ADC0 的 CH9
	 * 温度传感器输出电压随温度变化的趋势为7mV/度
	 * 具体的 ADC 读数与温度换算关系，可根据公式：y = kx + b
	 * 带入两个已知温度和其对应 ADC 读数，，计算出 k 和 b
	 ******************************************************/
	SYS->TEMPCR |= SYS_TEMPCR_EN_Msk;
	
	ADC_initStruct.clkdiv = 4;
	ADC_initStruct.refsrc = ADC_REF_VDD;
	ADC_initStruct.samplAvg = ADC_AVG_SAMPLE1;
	ADC_Init(ADC0, &ADC_initStruct);
	
	ADC_SEQ_initStruct.trig_src = ADC_TRIGGER_SW;
	ADC_SEQ_initStruct.samp_tim = 6;
	ADC_SEQ_initStruct.conv_cnt = 1;
	ADC_SEQ_initStruct.EOCIntEn = 0;
	ADC_SEQ_initStruct.channels = (uint8_t []){ ADC_CH9, 0xF };
	ADC_SEQ_Init(ADC0, ADC_SEQ0, &ADC_SEQ_initStruct);
	
	ADC_Open(ADC0);
	
	while(1==1)
	{
		ADC_Start(ADC_SEQ0, 0);
		while(ADC_Busy(ADC0)) __NOP();
		printf("%4d,", ADC_Read(ADC0, ADC_CH9));
	}
}


void SerialInit(void)
{
	UART_InitStructure UART_initStruct;
	
	PORT_Init(PORTA, PIN0, PORTA_PIN0_UART0_RX, 1);	//GPIOA.0配置为UART0 RXD
	PORT_Init(PORTA, PIN1, PORTA_PIN1_UART0_TX, 0);	//GPIOA.1配置为UART0 TXD
 	
 	UART_initStruct.Baudrate = 57600;
	UART_initStruct.DataBits = UART_DATA_8BIT;
	UART_initStruct.Parity = UART_PARITY_NONE;
	UART_initStruct.StopBits = UART_STOP_1BIT;
	UART_initStruct.RXThreshold = 3;
	UART_initStruct.RXThresholdIEn = 0;
	UART_initStruct.TXThreshold = 3;
	UART_initStruct.TXThresholdIEn = 0;
	UART_initStruct.TimeoutTime = 10;
	UART_initStruct.TimeoutIEn = 0;
 	UART_Init(UART0, &UART_initStruct);
	UART_Open(UART0);
}

/****************************************************************************************************************************************** 
* 函数名称: fputc()
* 功能说明: printf()使用此函数完成实际的串口打印动作
* 输    入: int ch		要打印的字符
*			FILE *f		文件句柄
* 输    出: 无
* 注意事项: 无
******************************************************************************************************************************************/
int fputc(int ch, FILE *f)
{
	UART_WriteByte(UART0, ch);
	
	while(UART_IsTXBusy(UART0));
 	
	return ch;
}
