nRF52832学习记录（九、SAADC）_nrf52832例程

最新推荐文章于 2024-11-04 18:03:24 发布

2401_85015385

最新推荐文章于 2024-11-04 18:03:24 发布

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/\*\*
 \* @brief UART events handler.
 \*/
void saadc\_callback(nrf\_drv\_saadc\_evt\_t const \* p_event){   
}

/\*
saadc的初始化
\*/
void saadc\_init(void)
{
    ret\_code\_t err_code;
    /\*
 使用默认配置配置saadc，可以根据自己需求修改配置
 #define NRF\_DRV\_SAADC\_DEFAULT\_CHANNEL\_CONFIG\_SE \
 NRFX\_SAADC\_DEFAULT\_CHANNEL\_CONFIG\_SE
 
 \* @brief Macro for setting @ref nrf\_saadc\_channel\_config\_t to default settings
 \* in single ended mode.
 \*
 \* @param PIN\_P Analog input.
 
 #define NRFX\_SAADC\_DEFAULT\_CHANNEL\_CONFIG\_SE(PIN\_P) \
 { \
 .resistor\_p = NRF\_SAADC\_RESISTOR\_DISABLED, \
 .resistor\_n = NRF\_SAADC\_RESISTOR\_DISABLED, \
 .gain = NRF\_SAADC\_GAIN1\_6, \
 .reference = NRF\_SAADC\_REFERENCE\_INTERNAL, \
 .acq\_time = NRF\_SAADC\_ACQTIME\_10US, \
 .mode = NRF\_SAADC\_MODE\_SINGLE\_ENDED, \
 .burst = NRF\_SAADC\_BURST\_DISABLED, \
 .pin\_p = (nrf\_saadc\_input\_t)(PIN\_P), \
 .pin\_n = NRF\_SAADC\_INPUT\_DISABLED \
 }
 上面各项内容的解释：
 NRF\_SAADC\_RESISTOR\_DISABLED：这个是那个正端负端设置，怎么后面还有一个？？
 typedef enum
 {
 NRF\_SAADC\_RESISTOR\_DISABLED = SAADC\_CH\_CONFIG\_RESP\_Bypass, ///< Bypass resistor ladder.
 NRF\_SAADC\_RESISTOR\_PULLDOWN = SAADC\_CH\_CONFIG\_RESP\_Pulldown, ///< Pull-down to GND.
 NRF\_SAADC\_RESISTOR\_PULLUP = SAADC\_CH\_CONFIG\_RESP\_Pullup, ///< Pull-up to VDD.
 NRF\_SAADC\_RESISTOR\_VDD1\_2 = SAADC\_CH\_CONFIG\_RESP\_VDD1\_2 ///< Set input at VDD/2.
 } nrf\_saadc\_resistor\_t;
 
 NRF\_SAADC\_GAIN1\_6：增益
 typedef enum
 {
 NRF\_SAADC\_GAIN1\_6 = SAADC\_CH\_CONFIG\_GAIN\_Gain1\_6, ///< Gain factor 1/6.
 NRF\_SAADC\_GAIN1\_5 = SAADC\_CH\_CONFIG\_GAIN\_Gain1\_5, ///< Gain factor 1/5.
 NRF\_SAADC\_GAIN1\_4 = SAADC\_CH\_CONFIG\_GAIN\_Gain1\_4, ///< Gain factor 1/4.
 NRF\_SAADC\_GAIN1\_3 = SAADC\_CH\_CONFIG\_GAIN\_Gain1\_3, ///< Gain factor 1/3.
 NRF\_SAADC\_GAIN1\_2 = SAADC\_CH\_CONFIG\_GAIN\_Gain1\_2, ///< Gain factor 1/2.
 NRF\_SAADC\_GAIN1 = SAADC\_CH\_CONFIG\_GAIN\_Gain1, ///< Gain factor 1.
 NRF\_SAADC\_GAIN2 = SAADC\_CH\_CONFIG\_GAIN\_Gain2, ///< Gain factor 2.
 NRF\_SAADC\_GAIN4 = SAADC\_CH\_CONFIG\_GAIN\_Gain4, ///< Gain factor 4.
 } nrf\_saadc\_gain\_t;

 NRF\_SAADC\_REFERENCE\_INTERNAL：参考电压
 typedef enum
 {
 NRF\_SAADC\_REFERENCE\_INTERNAL = SAADC\_CH\_CONFIG\_REFSEL\_Internal, ///< Internal reference (0.6 V).
 NRF\_SAADC\_REFERENCE\_VDD4 = SAADC\_CH\_CONFIG\_REFSEL\_VDD1\_4 ///< VDD/4 as reference.
 } nrf\_saadc\_reference\_t;

 NRF\_SAADC\_ACQTIME\_10US： 转换时间
 typedef enum
 {
 NRF\_SAADC\_ACQTIME\_3US = SAADC\_CH\_CONFIG\_TACQ\_3us, ///< 3 us.
 NRF\_SAADC\_ACQTIME\_5US = SAADC\_CH\_CONFIG\_TACQ\_