161 lines
3.3 KiB
C
161 lines
3.3 KiB
C
/**************************************************************************************************
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Filename: sh10.c
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Description: sh10 driver
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**************************************************************************************************/
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/******************************************************************************
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* INCLUDES
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*/
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#include "ioCC2530.h"
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#include "hal_defs.h"
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//#include "hal_types.h"
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#include "get_adc.h"
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/******************************************************************************
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* GLOBAL VARIABLES
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*/
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void hal_adc_Init(void);
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uint16 readVoltage(void);
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//static volatile uint32 value;
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void hal_adc_Init(void)
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{
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APCFG |=1;
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P0SEL |= (1 << (0));
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P0DIR &= ~(1 << (0));
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}
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/******************************************************************************
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* 名称 get_adc
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* 功能 读取A/D值
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* 入口参数 无
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* 出口参数 16位电压值，分辨率为10mV, 如0x0102表示2.58V
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*****************************************************************************/
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uint16 get_adc(void)
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{
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int32 value;
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hal_adc_Init(); // ADC初始化
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ADCIF = 0; //清ADC 中断标志
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//采用基准电压avdd5:3.3V，通道0，启动AD转化
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ADCCON3 = (0x80 | 0x10 | 0x00);
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while ( !ADCIF )
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{
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; //等待AD转化结束
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}
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value = ADCH;
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value = value<< 8;
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value |= ADCL;
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if(value&0x8000)
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value=0;
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// AD值转化成电压值
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// 0 表示 0V ，32768 表示 3.3V
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// 电压值 = (value*3.3)/32768 （V)
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value = (value * 330);
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value = value >> 15; // 除以32768
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// 返回分辨率为0.01V的电压值
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return (uint16)value;
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}
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#define ACH1 0
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#define ACH2 4
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#define ACH3 5
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#define ACH4 6
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void hal_adc4_Init(void);
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void hal_adc4_Init(void)
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{
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APCFG |= (1 << ACH1) | (1 << ACH2)| (1 << ACH3)| (1 << ACH4);
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P0SEL |= (1 << ACH1) | (1 << ACH2)| (1 << ACH3)| (1 << ACH4);
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P0DIR &= ~((1 << ACH1) | (1 << ACH2)| (1 << ACH3)| (1 << ACH4));
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}
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#define AD4MA 32768*150*4/3300
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#define AD20MA 32768*150*20/3300
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//return 10AD值，0---0v, 3ff---3.3v
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uint16 adC_ch(uint8 ch);
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uint16 adC_ch(uint8 ch)
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{
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int32 value;
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ADCIF = 0; //清ADC 中断标志
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//采用基准电压avdd5:3.3V，通道ch，启动AD转化
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ADCCON3 = (0x80 | 0x10 | (ch&0x0f) );
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while ( !ADCIF )
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{
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; //等待AD转化结束
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}
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value = ADCH;
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value = value<< 8;
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value |= ADCL;
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if(value&0x8000)
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value=0;
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value= value>>5;
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return (uint16)value;
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/*
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// AD值转化成电压值
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// 0 表示 0V ，32768 表示 3.3V
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// 电流 0--4ma, 255--20ma, 电阻150r
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value = (value - AD4MA)*255/(AD20MA - AD4MA);
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if(value<0)
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return 0;
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if(value>255)
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return 255;
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return (uint8)value&0xff;*/
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}
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/******************************************************************************
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* 名称 get_adc4
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* 功能 读取四通道A/D值 ch0 ch4 ch5 ch6
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* 入口参数 无
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* 出口参数
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*****************************************************************************/
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void get_adc4ch(uint8 *buf)
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{
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uint16 value;
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hal_adc4_Init(); // ADC初始化
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value=adC_ch(ACH1);
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*buf=value;
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buf++;
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*buf=value>>8;
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buf++;
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value=adC_ch(ACH2);
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*buf=value;
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buf++;
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*buf=value>>8;
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buf++;
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value=adC_ch(ACH3);
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*buf=value;
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buf++;
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*buf=value>>8;
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buf++;
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value=adC_ch(ACH4);
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*buf=value;
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buf++;
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*buf=value>>8;
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}
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