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- /*********************************************************************
- * INCLUDES
- */
- #include "bsp_adc.h"
- #include "system.h"
- /*********************************************************************
- * DEFINITIONS
- */
- #define CHANNEL_MAX 8
- #define PIN_NOT_USED 0xFF
- #define CHANNEL_NOT_USED 0xFF
- #define WAIT_TIME_VALUE 3 // 等待超时最大值
- /*********************************************************************
- * STRUCTION
- */
- typedef struct {
- uint32_t pin;
- uint32_t channel;
- }adc_config_t;
- /*********************************************************************
- * LOCAL VARIABLES
- */
- static adc_config_t m_adc_config[CHANNEL_MAX] = {{PIN_NOT_USED,CHANNEL_NOT_USED},{PIN_NOT_USED,CHANNEL_NOT_USED},{PIN_NOT_USED,CHANNEL_NOT_USED},{PIN_NOT_USED,CHANNEL_NOT_USED},{PIN_NOT_USED,CHANNEL_NOT_USED},{PIN_NOT_USED,CHANNEL_NOT_USED},{PIN_NOT_USED,CHANNEL_NOT_USED},{PIN_NOT_USED,CHANNEL_NOT_USED}};
- static nrf_saadc_channel_config_t channelConfig[CHANNEL_MAX];
- static nrf_saadc_value_t s_bufferPool[CHANNEL_MAX] = {0};
- static volatile bool adc_SampleOk = true; // adc采集完成标志
- //定义SAADC采样数据缓存
- //定义SAADC采样缓存数组大小
- //只有采样结果存满该缓存之后,才会产生SAADC采样完成事件
- static uint32_t sample_in_buffer = 0;
- /*********************************************************************
- * LOCAL FUNCTIONS
- */
- /**
- @brief ADC中断处理回调函数
- @param 无
- @return 无
- */
- static void adcCallbackFunc(nrf_drv_saadc_evt_t const *pEvent)
- {
- ret_code_t err_code;
- if(pEvent->type == NRF_DRV_SAADC_EVT_DONE) // 采样完成,采集时填充顺序为,通道编号小的先填充。
- {
- //设置好缓存,为下一次采样做准备
- err_code=nrf_drv_saadc_buffer_convert(pEvent->data.done.p_buffer,sample_in_buffer);
- APP_ERROR_CHECK(err_code);
- adc_SampleOk = true;
- }
- }
- /**
- @brief 初始化ADC
- @param 无
- @return 无
- */
- static void ADC_Init(void)
- {
- ret_code_t errCode;
- nrf_drv_saadc_config_t p_config = NRFX_SAADC_DEFAULT_CONFIG;
- p_config.interrupt_priority = ADC_IRQ_PRIORITY;
-
-
- // ADC初始化
- errCode = nrf_drv_saadc_init(&p_config, adcCallbackFunc);//优先级设置为3,比定时器中断要高,不然回调会在定时器中断结束后触发。
- APP_ERROR_CHECK(errCode);
- // ADC通道配置
- for(int i=0;i<CHANNEL_MAX;i++)
- {
- if(m_adc_config[i].pin != PIN_NOT_USED && m_adc_config[i].channel != CHANNEL_NOT_USED)
- {
- //设置ADC引脚为浮空
- nrf_gpio_cfg_input(m_adc_config[i].pin,NRF_GPIO_PIN_NOPULL);
- // 单端输入
- channelConfig[m_adc_config[i].channel].resistor_p = NRF_SAADC_RESISTOR_DISABLED;
- channelConfig[m_adc_config[i].channel].resistor_n = NRF_SAADC_RESISTOR_DISABLED;
- channelConfig[m_adc_config[i].channel].gain = NRF_SAADC_GAIN1_6;
- channelConfig[m_adc_config[i].channel].reference = NRF_SAADC_REFERENCE_INTERNAL;
- channelConfig[m_adc_config[i].channel].acq_time = NRF_SAADC_ACQTIME_10US;
- channelConfig[m_adc_config[i].channel].mode = NRF_SAADC_MODE_SINGLE_ENDED;
- channelConfig[m_adc_config[i].channel].burst = NRF_SAADC_BURST_DISABLED;
- channelConfig[m_adc_config[i].channel].pin_p = (nrf_saadc_input_t)(m_adc_config[i].channel + 1);
- channelConfig[m_adc_config[i].channel].pin_n = NRF_SAADC_INPUT_DISABLED;
- // ADC通道初始化
- errCode = nrf_drv_saadc_channel_init(m_adc_config[i].channel, &channelConfig[m_adc_config[i].channel]);
- APP_ERROR_CHECK(errCode);
- sample_in_buffer++;
- }
- }
- if(sample_in_buffer > 0)
- {
- // 缓冲配置
- errCode = nrf_drv_saadc_buffer_convert(s_bufferPool, sample_in_buffer);
- APP_ERROR_CHECK(errCode);
- }
- }
- static void cb_adcWakeup(uint32_t t)
- {
- ADC_Enable();
- }
- static void cb_adcSleep(uint32_t t)
- {
- ADC_Disable();
- }
- /*********************************************************************
- * PUBLIC FUNCTIONS
- */
- /**
- @brief 初始化ADC引脚和通道
- @param pin -[in] 需要初始化的adc引脚
- @param channel -[in] 需要初始化的adc通道
- @return 错误代码
- */
- uint32_t ADC_SetPinChannel(uint32_t pin, uint32_t channel)
- {
- for(int i=0;i<CHANNEL_MAX;i++)
- {
- if(m_adc_config[i].pin == pin)return ADC_ERR_INIT_PIN;
- if(m_adc_config[i].channel == channel)return ADC_ERR_INIT_CHANNEL;
- if(PIN_NOT_USED != pin && m_adc_config[i].pin == PIN_NOT_USED)
- {
- m_adc_config[i].pin = pin;
- m_adc_config[i].channel = channel;
- return ADC_OP_SUCCESS;
- }
- }
- return ADC_ERR_INIT_CONGESTION;
- }
- /**
- @brief 移除已初始化ADC引脚和通道
- @param pin -[in] 需要移除的adc引脚
- @param channel -[in] 需要移除的adc通道
- @return 错误代码
- */
- uint32_t ADC_RemovePinChannel(uint32_t pin, uint32_t channel)
- {
- for(int i=0;i<CHANNEL_MAX;i++)
- {
- if(m_adc_config[i].pin == pin && m_adc_config[i].channel == channel)
- {
- m_adc_config[i].pin = PIN_NOT_USED;
- m_adc_config[i].channel = CHANNEL_NOT_USED;
- return ADC_OP_SUCCESS;
- }
- }
- return ADC_ERR_REMOVE_PIN_CHANNEL;
- }
- /**
- @brief ADC初始化
- @param 无
- @return 无
- */
- void ADC_Initialize(void)
- {
- ADC_SetPinChannel(PIN_ADC_BAT_IN, PIN_ADC_BAT_CHANNEL);
- ADC_SetPinChannel(PIN_ADC_CHARGMEASURE, PIN_ADC_CHARGMEASURE_CHANNEL);
- ADC_Init();
- Wakeup_Regist(cb_adcWakeup);
- Sleep_Regist(cb_adcSleep);
- }
- /**
- @brief ADC读取
- @param channel -[in] 需要读取的通道
- @param p_adc_value -[out] 返回读取的通道值
- @return 错误代码
- */
- uint32_t ADC_Read(uint32_t channel, int16_t *p_adc_value)
- {
- uint32_t errCode;
- uint32_t wait_time_out = WAIT_TIME_VALUE;
- uint8_t adc_sort[CHANNEL_MAX] = {0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF};
- uint8_t sort_index = 0;
- int i;
- adc_SampleOk = false;
-
- //没有配置通道返回失败
- if(sample_in_buffer == 0)return ADC_ERR_READ_NO_CHANNEL;
-
- errCode = nrf_drv_saadc_sample();
- APP_ERROR_CHECK(errCode);
- //等待采集
- while(!adc_SampleOk)
- {
- if(wait_time_out--){
- nrf_pwr_mgmt_run();
- }
- else{
- return ADC_ERR_READ_TIMEOUT;
- }
- }
- //预先排序,采集时填充顺序为,通道编号小的先填充。
- for(i=0;i<CHANNEL_MAX;i++)
- {
- if(channelConfig[i].pin_p != NRF_SAADC_INPUT_DISABLED){
- adc_sort[sort_index] = i;
- sort_index++;
- }
- }
- //获取数据
- for(i=0;i<sample_in_buffer;i++)
- {
- if(adc_sort[i] == channel)
- {
- *p_adc_value = s_bufferPool[i];
- }
- }
- return ADC_OP_SUCCESS;
- }
- /**
- @brief 开启ADC,与初始化没有区别,为了与Disable成对出现
- @param 无
- @return 无
- */
- void ADC_Enable(void)
- {
- ADC_Init();
- }
- /**
- @brief 禁用ADC
- @param 无
- @return 无
- */
- void ADC_Disable(void)
- {
- nrf_drv_saadc_uninit();
- sample_in_buffer = 0;
- }
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