git: update to v1.0HEADv1.0master

1 files changed, 162 insertions, 0 deletions

diff --git a/avr/gpio.c b/avr/gpio.c
new file mode 100644
index 0000000..8a5885f
--- /dev/null
+++ b/avr/gpio.c
@@ -0,0 +1,162 @@
+/************************************************************************/
+/*                                                                      */
+/*  File:           avr/gpio.c                                          */
+/*  Description:    general purpose input/output driver.                */
+/*  Version:        1.0                                                 */
+/*  Author:         Otto Mattik                                         */
+/*                                                                      */
+/*  (C)Copyright Otto Mattik 2014-2021.                                 */
+/*                                                                      */
+/*  This file is a part of 'armen' (a tiny operating system).           */
+/*  'armen' is distributed under the CeCILL-V2.1 licence. For more      */
+/*  details about this licence, please visit the website cecill.info    */
+/*                                                                      */
+/************************************************************************/
+
+#ifndef AVR_GPIO_C
+  #error "do not use this code directly, it must be included via gpio.c"
+#endif
+
+#include <stdint.h>
+#include <avr/io.h>
+
+#if defined(__AVR_ATtiny84__)
+  #define GPIO_MAX_PORT     2
+#elif defined(__AVR_ATtiny841__)
+  #define GPIO_MAX_PORT     2
+#elif defined(__AVR_ATtiny85__)
+  #define GPIO_MAX_PORT     1
+#elif defined(__AVR_ATtiny1634__)
+  #define GPIO_MAX_PORT     3
+#elif defined(__AVR_ATmega328P__)
+  #define GPIO_MAX_PORT     3
+#elif defined(__AVR_ATmega2560__)
+  #define GPIO_MAX_PORT     11
+#else
+  #error "no or unavailable cpu defined"
+#endif
+
+static struct {
+    uint8_t* pin;
+    uint8_t* ddr;
+    uint8_t* port;
+} ports[GPIO_MAX_PORT] = {
+#if defined(__AVR_ATtiny84__)\
+ || defined(__AVR_ATtiny841__)
+    { 0x0039, 0x003A, 0x003B },
+    { 0x0036, 0x0037, 0x0038 }
+#elif defined(__AVR_ATtiny85__)
+    { 0x0016, 0x0017, 0x0018 }
+#elif defined(__AVR_ATtiny1634__)
+    { 0x002F, 0x0030, 0x0031 },
+    { 0x002B, 0x002C, 0x002D },
+    { 0x0027, 0x0028, 0x0029 }
+#elif defined(__AVR_ATmega328P__)
+    { 0x0023, 0x0024, 0x0025 },
+    { 0x0026, 0x0027, 0x0028 },
+    { 0x0029, 0x002A, 0x002B }
+#elif defined(__AVR_ATmega2560__)
+    { 0x0020, 0x0021, 0x0022 },
+    { 0x0023, 0x0024, 0x0025 },
+    { 0x0026, 0x0027, 0x0028 },
+    { 0x0029, 0x002A, 0x002B },
+    { 0x002C, 0x002D, 0x002E },
+    { 0x002F, 0x0030, 0x0031 },
+    { 0x0032, 0x0033, 0x0034 },
+    { 0x0100, 0x0101, 0x0102 },
+    { 0x0104, 0x0104, 0x0105 },
+    { 0x0106, 0x0107, 0x0108 },
+    { 0x0109, 0x010A, 0x010B }
+#endif
+};
+
+/*
+ * read state of a gpio pin
+ *
+ * input:
+ *  gpio        gpio pin
+ * output:
+ *  low or high if success, otherwise -1
+*/
+int8_t gpio_pin_get( uint8_t gpio )
+{
+#ifdef CHECK_PARAM
+    if( gpio >= (GPIO_MAX_PORT << 3) )
+        return( -1 );
+#endif
+    return( (*ports[gpio >> 3].pin >> (gpio & 7)) & 1 );
+}
+
+/*
+ * set state of a gpio pin
+ *
+ * input:
+ *  gpio        gpio pin
+ *  value       low or high
+*/
+void gpio_pin_set( uint8_t gpio, uint8_t value )
+{
+#ifdef CHECK_PARAM
+    if( gpio < (GPIO_MAX_PORT << 3) )
+#endif
+    {
+        uint8_t port = gpio >> 3;
+        uint8_t mask = 1 << (gpio & 7);
+
+        if( value != 0 )
+            *ports[gpio >> 3].port |= mask;
+        else
+            *ports[gpio >> 3].port &= ~mask;
+    }
+}
+
+/*
+ * set a gpio pin as input
+ *
+ * input:
+ *  gpio        gpio pin
+*/
+void gpio_pin_mode_input( uint8_t gpio )
+{
+#ifdef CHECK_PARAM
+    if( gpio < (GPIO_MAX_PORT << 3) )
+#endif
+        *ports[gpio >> 3].ddr &= ~(1 << (gpio & 7));
+}
+
+/*
+ * set a gpio pin as output
+ *
+ * input:
+ *  gpio        gpio pin
+ *  value       initial value, low or high
+*/
+void gpio_pin_mode_output( uint8_t gpio, uint8_t value )
+{
+#ifdef CHECK_PARAM
+    if( gpio < (GPIO_MAX_PORT << 3) )
+#endif
+    {
+        uint8_t port = gpio >> 3;
+        uint8_t mask = 1 << (gpio & 7);
+
+        if( value != 0 )
+            *ports[port].port |= mask;
+        else
+            *ports[port].port &= ~mask;
+        *ports[port].ddr |= mask;
+    }
+}
+
+#ifdef USE_ADC
+  #include "avr/adc.c"
+#endif
+
+#ifdef USE_PWM
+  #include "avr/pwm.c"
+#endif
+
+#ifdef USE_PCINT
+  #include "avr/pcint.c"
+#endif
+