From dddfb681c737c5623dc270bf6c8e59fd3b13b092 Mon Sep 17 00:00:00 2001 From: Kevin O'Connor Date: Wed, 27 Feb 2019 11:07:51 -0500 Subject: pins: Add support for pull down resistors Add initial support for selecting pull down resistors (for micro-controllers that support it). Signed-off-by: Kevin O'Connor --- src/avr/gpio.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'src/avr') diff --git a/src/avr/gpio.c b/src/avr/gpio.c index c7ca1220..6ff21c26 100644 --- a/src/avr/gpio.c +++ b/src/avr/gpio.c @@ -74,7 +74,7 @@ gpio_out_write(struct gpio_out g, uint8_t val) struct gpio_in gpio_in_setup(uint8_t pin, int8_t pull_up) { - if (GPIO2PORT(pin) >= ARRAY_SIZE(digital_regs)) + if (GPIO2PORT(pin) >= ARRAY_SIZE(digital_regs) || pull_up < 0) goto fail; struct gpio_digital_regs *regs = GPIO2REGS(pin); if (! regs) @@ -83,7 +83,7 @@ gpio_in_setup(uint8_t pin, int8_t pull_up) gpio_in_reset(g, pull_up); return g; fail: - shutdown("Not an input pin"); + shutdown("Not a valid input pin"); } void -- cgit v1.2.3-70-g09d2