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Dependencies: BLE_API nRF51822
Fork of BLE_NODE_TEST by
battery.h@11:22480ac31879, 2014-11-27 (annotated)
- Committer:
- yihui
- Date:
- Thu Nov 27 09:30:36 2014 +0000
- Revision:
- 11:22480ac31879
- Parent:
- 9:05f0b5a3a70a
change to new revision hardware
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
yihui | 9:05f0b5a3a70a | 1 | |
yihui | 9:05f0b5a3a70a | 2 | |
yihui | 9:05f0b5a3a70a | 3 | #ifndef __BATTERY_H__ |
yihui | 9:05f0b5a3a70a | 4 | #define __BATTERY_H__ |
yihui | 9:05f0b5a3a70a | 5 | |
yihui | 9:05f0b5a3a70a | 6 | #include "mbed.h" |
yihui | 9:05f0b5a3a70a | 7 | |
yihui | 9:05f0b5a3a70a | 8 | class Battery { |
yihui | 9:05f0b5a3a70a | 9 | public: |
yihui | 9:05f0b5a3a70a | 10 | Battery(PinName pin) { |
yihui | 11:22480ac31879 | 11 | uint32_t n = (uint32_t) pin; |
yihui | 11:22480ac31879 | 12 | channel = 1 << (1 + n); |
yihui | 9:05f0b5a3a70a | 13 | } |
yihui | 9:05f0b5a3a70a | 14 | |
yihui | 9:05f0b5a3a70a | 15 | float read() { |
yihui | 9:05f0b5a3a70a | 16 | uint32_t pre_enable_register = NRF_ADC->ENABLE; |
yihui | 9:05f0b5a3a70a | 17 | uint32_t pre_config_register = NRF_ADC->CONFIG; |
yihui | 11:22480ac31879 | 18 | |
yihui | 9:05f0b5a3a70a | 19 | |
yihui | 9:05f0b5a3a70a | 20 | NRF_ADC->ENABLE = ADC_ENABLE_ENABLE_Enabled; |
yihui | 9:05f0b5a3a70a | 21 | NRF_ADC->CONFIG = (ADC_CONFIG_RES_10bit << ADC_CONFIG_RES_Pos) | |
yihui | 9:05f0b5a3a70a | 22 | (ADC_CONFIG_INPSEL_AnalogInputNoPrescaling << ADC_CONFIG_INPSEL_Pos) | |
yihui | 9:05f0b5a3a70a | 23 | (ADC_CONFIG_REFSEL_VBG << ADC_CONFIG_REFSEL_Pos) | |
yihui | 9:05f0b5a3a70a | 24 | (channel << ADC_CONFIG_PSEL_Pos) | |
yihui | 9:05f0b5a3a70a | 25 | (ADC_CONFIG_EXTREFSEL_None << ADC_CONFIG_EXTREFSEL_Pos); |
yihui | 9:05f0b5a3a70a | 26 | |
yihui | 9:05f0b5a3a70a | 27 | NRF_ADC->TASKS_START = 1; |
yihui | 9:05f0b5a3a70a | 28 | while (((NRF_ADC->BUSY & ADC_BUSY_BUSY_Msk) >> ADC_BUSY_BUSY_Pos) == ADC_BUSY_BUSY_Busy) { |
yihui | 9:05f0b5a3a70a | 29 | } |
yihui | 9:05f0b5a3a70a | 30 | |
yihui | 9:05f0b5a3a70a | 31 | uint16_t value = NRF_ADC->RESULT; |
yihui | 9:05f0b5a3a70a | 32 | |
yihui | 9:05f0b5a3a70a | 33 | NRF_ADC->ENABLE = pre_enable_register; |
yihui | 9:05f0b5a3a70a | 34 | NRF_ADC->CONFIG = pre_config_register; |
yihui | 9:05f0b5a3a70a | 35 | |
yihui | 9:05f0b5a3a70a | 36 | return (float)value * (1.0f / (float)0x3FF) * 1.2 * 12.2 / 2.2; |
yihui | 9:05f0b5a3a70a | 37 | } |
yihui | 9:05f0b5a3a70a | 38 | |
yihui | 9:05f0b5a3a70a | 39 | private: |
yihui | 11:22480ac31879 | 40 | uint32_t channel; |
yihui | 9:05f0b5a3a70a | 41 | }; |
yihui | 9:05f0b5a3a70a | 42 | |
yihui | 9:05f0b5a3a70a | 43 | #endif // __BATTERY_H__ |