initial

gpio.c

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+/*
+ * gpio.c
+ *
+ *  Created on: 29.08.2016
+ *      Author: wn
+ */
+
+
+#include <msp430g2553.h>
+#include <stdint.h>
+
+#define GPIO_C
+#include "gpio.h"
+#undef GPIO_C
+
+
+
+extern tPinCfg pinCfg[];
+
+
+void gpioInitPins() {
+  P1OUT = 0;
+  P1DIR = 0;
+  P1REN = 0;
+  P2OUT = 0;
+  P2DIR = 0;
+  P2REN = 0;
+
+  for (tPin p = PINS_FIRST; p < PINS_END; p += 1) {
+    tPinCfg pin = pinCfg[p];
+    if (pin.portId == PORT1) {
+      if (pin.direction == PIN_OUT) {
+        P1DIR |= pin.bit;
+        P1SEL &= ~pin.bit;
+        P1SEL2 &= ~pin.bit;
+        gpioSetPin(p, pin.defaultOut);
+      } else if (pin.direction == PIN_IN) {
+        P1DIR &= ~pin.bit;
+        P1SEL &= ~pin.bit;
+        P1SEL2 &= ~pin.bit;
+        P1REN &= ~pin.bit;
+      } else if (pin.direction == PIN_IN_PULLUP) {
+        P1DIR &= ~pin.bit;
+        P1SEL &= ~pin.bit;
+        P1SEL2 &= ~pin.bit;
+        P1REN |= pin.bit;
+        P1OUT |= pin.bit;
+      }
+    } else if (pin.portId == PORT2) {
+      if (pin.direction == PIN_OUT) {
+        P2DIR |= pin.bit;
+        P2SEL &= ~pin.bit;
+        P2SEL2 &= ~pin.bit;
+        gpioSetPin(p, pin.defaultOut);
+      } else if (pin.direction == PIN_IN) {
+        P2DIR &= ~pin.bit;
+        P2SEL &= ~pin.bit;
+        P2SEL2 &= ~pin.bit;
+        P2REN &= ~pin.bit;
+      } else if (pin.direction == PIN_IN_PULLUP) {
+        P2DIR &= ~pin.bit;
+        P2SEL &= ~pin.bit;
+        P2SEL2 &= ~pin.bit;
+        P2REN |= pin.bit;
+        P2OUT |= pin.bit;
+      }
+    }
+  }
+}
+
+void gpioSetPin(tPin p, tPinState v) {
+  tPinCfg pin = pinCfg[p];
+  if (v == HIGH) {
+    if (pin.portId == PORT1) {
+      P1OUT |= pin.bit;
+    } else if (pin.portId == PORT2) {
+      P2OUT |= pin.bit;
+    }
+  } else {
+    if (pin.portId == PORT1) {
+      P1OUT &= ~pin.bit;
+    } else if (pin.portId == PORT2) {
+      P2OUT &= ~pin.bit;
+    }
+  }
+}
+
+void gpioTogglePin(tPin p) {
+  tPinCfg pin = pinCfg[p];
+  if (pin.portId == PORT1) {
+    P1OUT ^= pin.bit;
+  } else if (pin.portId == PORT2) {
+    P2OUT ^= pin.bit;
+  }
+}
+
+tPinState gpioGetPin(tPin p) {
+  tPinCfg pin = pinCfg[p];
+  uint16_t pinValue = 0;
+  if (pin.portId == PORT1) {
+    pinValue = P1IN;
+  } else if (pin.portId == PORT2) {
+    pinValue = P2IN;
+  }
+  return (pinValue & pin.bit) ? HIGH : LOW;
+}

gpio.h

@@ -0,0 +1,54 @@
+/*
+ * gpio.h
+ *
+ *  Created on: 29.08.2016
+ *      Author: wn
+ */
+
+#ifndef GPIO_H_
+#define GPIO_H_
+
+
+#include <msp430g2553.h>
+#include <stdint.h>
+
+
+
+typedef enum {
+  PORT1,
+  PORT2
+} tPort;
+
+typedef enum {
+  LOW,
+  HIGH,
+} tPinState;
+
+typedef enum {
+  PIN_OUT,
+  PIN_IN,
+  PIN_IN_PULLUP
+} tPinDirection;
+
+typedef struct {
+  tPort portId;
+  uint16_t bit;
+  tPinDirection direction;
+  tPinState defaultOut;
+} tPinCfg;
+
+
+
+#include "gpioCfg.h"
+
+
+void gpioInitPins();
+void gpioSetPin(tPin p, tPinState v);
+void gpioTogglePin(tPin p);
+tPinState gpioGetPin(tPin p);
+
+
+
+
+
+#endif /* GPIO_H_ */

gpioCfg.c-example

@@ -0,0 +1,24 @@
+/*
+ * gpioCfg.c
+ *
+ *  Created on: 29.08.2016
+ *      Author: wn
+ */
+
+#include <msp430g2553.h>
+#include "gpio.h"
+
+tPinCfg pinCfg[PINS_END] = {
+    {PORT1, BIT7, PIN_OUT, LOW}, //A
+    {PORT1, BIT6, PIN_OUT, LOW}, //B
+    {PORT2, BIT1, PIN_OUT, LOW}, //C
+    {PORT2, BIT3, PIN_OUT, LOW}, //D
+    {PORT2, BIT4, PIN_OUT, LOW}, //E
+    {PORT2, BIT5, PIN_OUT, LOW}, //F
+    {PORT2, BIT2, PIN_OUT, LOW}, //G
+    {PORT2, BIT0, PIN_OUT, HIGH}, //0
+    {PORT1, BIT5, PIN_OUT, HIGH}, //1
+    {PORT1, BIT2, PIN_OUT, HIGH}, //2
+    {PORT1, BIT0, PIN_IN_PULLUP, LOW}, // BUTTON_1
+    {PORT1, BIT1, PIN_OUT, LOW}, // LED_1
+};

gpioCfg.h-example

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+/*
+ * gpioCfg.h
+ *
+ *  Created on: 18.09.2016
+ *      Author: wn
+ */
+
+#ifndef GPIOCFG_H_
+#define GPIOCFG_H_
+
+#include "gpio.h"
+
+typedef enum {
+  PINS_FIRST,
+  SEG_A = PINS_FIRST,
+  SEG_B,
+  SEG_C,
+  SEG_D,
+  SEG_E,
+  SEG_F,
+  SEG_G,
+  DIGIT_0,
+  DIGIT_1,
+  DIGIT_2,
+  BUTTON_1,
+  LED_1,
+  PINS_END
+} tPin;
+
+
+#endif /* GPIOCFG_H_ */