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stm32: Support reading chip based temperature sensor on stm32f0 

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
This commit is contained in:
Kevin O'Connor 2020-10-07 11:44:58 -04:00
parent a8069e9ba8
commit 9142200b3a
1 changed files with 10 additions and 2 deletions
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12
src/stm32/stm32f0_adc.c
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@ -1,6 +1,6 @@
// ADC functions on STM32
//
// Copyright (C) 2019 Kevin O'Connor <kevin@koconnor.net>
// Copyright (C) 2019-2020 Kevin O'Connor <kevin@koconnor.net>
//
// This file may be distributed under the terms of the GNU GPLv3 license.
@ -15,11 +15,15 @@
DECL_CONSTANT("ADC_MAX", 4095);
#define ADC_TEMPERATURE_PIN 0xfe
DECL_ENUMERATION("pin", "ADC_TEMPERATURE", ADC_TEMPERATURE_PIN);
static const uint8_t adc_pins[] = {
GPIO('A', 0), GPIO('A', 1), GPIO('A', 2), GPIO('A', 3),
GPIO('A', 4), GPIO('A', 5), GPIO('A', 6), GPIO('A', 7),
GPIO('B', 0), GPIO('B', 1), GPIO('C', 0), GPIO('C', 1),
GPIO('C', 2), GPIO('C', 3), GPIO('C', 4), GPIO('C', 5),
ADC_TEMPERATURE_PIN
};
struct gpio_adc
@ -68,7 +72,11 @@ gpio_adc_setup(uint32_t pin)
}
}
gpio_peripheral(pin, GPIO_ANALOG, 0);
if (pin == ADC_TEMPERATURE_PIN) {
ADC1_COMMON->CCR = ADC_CCR_TSEN;
} else {
gpio_peripheral(pin, GPIO_ANALOG, 0);
}
return (struct gpio_adc){ .adc = adc, .chan = 1 << chan };
}