Add support for GPIO input filtering activation

diff --git a/drivers/gpio.c b/drivers/gpio.c
index 99a49c6..c5ed653 100644 (file)
--- a/drivers/gpio.c
+++ b/drivers/gpio.c
@@ -76,6 +76,16 @@ void config_gpio(const struct pio* gpio, uint32_t mode, uint8_t dir, uint8_t ini
        }
 }
 
+/*
+ * This function enables filtering the GPIO input signal, using one of the filtering
+ * clock dividers which must be configured before calling this function by using the
+ * config_gpio_filtering_clk_divider() function.
+ */
+void config_gpio_add_filtering(const struct pio* gpio, uint8_t filt_cnt, uint8_t filt_clk)
+{
+       config_pio(gpio, LPC_IO_SAMPLE_MODE(filt_cnt) | LPC_IO_SAMPLE_CLK_DIV(filt_clk) | LPC_IO_DIGITAL);
+}
+
 /***************************************************************************** */
 /* GPIO Interrupts Callbacks */
 static void (*gpio_callbacks_port0[PORT0_NB_PINS]) (uint32_t);

diff --git a/include/drivers/gpio.h b/include/drivers/gpio.h
index 9d6a19b..18acdbf 100644 (file)
--- a/include/drivers/gpio.h
+++ b/include/drivers/gpio.h
@@ -138,6 +138,14 @@ static inline uint32_t gpio_read(const struct pio gpio)
  */
 void config_gpio(const struct pio* gpio, uint32_t mode, uint8_t dir, uint8_t ini_val);
 
+/*
+ * This function enables filtering the GPIO input signal, using one of the filtering
+ * clock dividers which must be configured before calling this function by using the
+ * config_gpio_filtering_clk_divider() function.
+ */
+void config_gpio_add_filtering(const struct pio* gpio, uint8_t filt_cnt, uint8_t filt_clk);
+
+
 
 /* GPIO Interrupts */
 /* Add a callback on a GPIO interrupt.