mcu: Obtain the maximum adc value from the firmware

Don't assume the hardware ADC has 10bit resultion - instead have the firmware define a constant and read that constant in the host. Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
2016-12-22 23:58:51 -05:00
parent fe95ea221b
commit 872b08601a
2 changed files with 4 additions and 2 deletions
--- a/src/avr/gpio.c
+++ b/src/avr/gpio.c
@@ -258,6 +258,8 @@ gpio_pwm_setup(uint8_t pin, uint32_t cycle_time, uint8_t val)
 }


+DECL_CONSTANT(ADC_MAX, 1024);
+
 struct gpio_adc
 gpio_adc_setup(uint8_t pin)
 {