X-Git-Url: http://git.kpe.io/?p=avr_bc100.git;a=blobdiff_plain;f=BaseMegaFirmware%2FGCC%2Fkey_io.c;fp=BaseMegaFirmware%2FGCC%2Fkey_io.c;h=3c8eaa7209b531aa8c39b161f135d08d07ab2796;hp=0000000000000000000000000000000000000000;hb=89173ec9cd6f33843bf27c45be0f2f9be3f5f0ce;hpb=7997f136b12114035265bd082c854bff95fd73dc

diff --git a/BaseMegaFirmware/GCC/key_io.c b/BaseMegaFirmware/GCC/key_io.c
new file mode 100644
index 0000000..3c8eaa7
--- /dev/null
+++ b/BaseMegaFirmware/GCC/key_io.c
@@ -0,0 +1,76 @@
+// M. Thomas 11/2007
+
+#include <avr/io.h>
+#include <avr/interrupt.h>
+#include "key_io.h"
+
+/* define externs */
+// debounced and inverted key state, bit = 1: key pressed
+volatile uint8_t key_io_state;		
+// key press detect
+volatile uint8_t key_io_press;
+// key long press and repeat
+volatile uint8_t key_io_rpt;
+
+void key_io_init(void)
+{
+	KEY_IO_KEYSA_DDR &= ~( 
+		(1<<KEY_IO_KEYA1_BIT) | (1<<KEY_IO_KEYA2_BIT) |
+		(1<<KEY_IO_KEYA3_BIT) | (1<<KEY_IO_KEYA4_BIT) );
+	KEY_IO_KEYSB_DDR &= ~(1<<KEY_IO_KEYB1_BIT);
+	// external pull-ups avail. for all keys -> no init here
+	key_io_state = key_io_state_hardware();
+}
+
+uint8_t key_io_get_press( uint8_t key_mask )
+{
+	uint8_t sreg;
+
+	sreg = SREG;
+	cli();
+
+	key_mask &= key_io_press; // read key(s)
+	key_io_press ^= key_mask; // clear key(s)
+
+	SREG = sreg;
+
+	return key_mask;
+}
+
+uint8_t key_io_get_rpt( uint8_t key_mask )
+{
+	uint8_t sreg;
+
+	sreg = SREG;
+	cli();
+
+	key_mask &= key_io_rpt;  // read key(s)
+	key_io_rpt ^= key_mask;  // clear key(s)
+	
+	SREG = sreg;
+
+	return key_mask;
+}
+
+uint8_t key_io_get_was_short( uint8_t key_mask )
+{
+	uint8_t sreg, ret;
+
+	sreg=SREG;
+	// read key state and key press atomic !
+	cli();
+
+	ret =  key_io_get_press( ~key_io_state & key_mask );
+
+	SREG = sreg;
+
+	return ret;
+
+}
+
+uint8_t key_io_get_longpress( uint8_t key_mask )
+{
+	return key_io_get_press( key_io_get_rpt( key_mask ));
+}
+
+