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Extend nRF51 AnalogIn voltage range to 3.6 V 

Previous the voltage range was set to 1.2 from SoC internal reference source.
This caused problem with testing. It is unexpected that range is much
shorter than vdd as well.

The voltage range was extended using SoC build in analog prescaler (set to 1/3).
pull/5200/head
Andrzej Puzdrowski 2017-09-26 11:28:06 +02:00
parent c6f655c02e
commit f861b37196
1 changed files with 1 additions and 1 deletions
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2
targets/TARGET_NORDIC/TARGET_NRF5/TARGET_MCU_NRF51822_UNIFIED/analogin_api.c
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@ -67,7 +67,7 @@ uint16_t analogin_read_u16(analogin_t *obj)
// initialization by assigment because IAR dosen't support variable initializer in declaration statement.
adc_channel.config.config.resolution = NRF_ADC_CONFIG_RES_10BIT;
adc_channel.config.config.input = NRF_ADC_CONFIG_SCALING_INPUT_FULL_SCALE;
adc_channel.config.config.input = NRF_ADC_CONFIG_SCALING_INPUT_ONE_THIRD;
adc_channel.config.config.reference = NRF_ADC_CONFIG_REF_VBG;
adc_channel.config.config.ain = (obj->adc_pin);
adc_channel.p_next = NULL;