Implement digital IO functions

thg55 · Nov 21, 2014 · 66cac95 · 66cac95
1 parent e21371d
commit 66cac95
Show file tree

Hide file tree

Showing 4 changed files with 82 additions and 39 deletions.
diff --git a/cores/esp8266/wiring.c b/cores/esp8266/wiring.c
@@ -67,5 +67,5 @@ void delayMicroseconds(unsigned int us)
 
 void init()
 {
-    // system_timer_reinit();
+    initPins();
 }
diff --git a/cores/esp8266/wiring_digital.c b/cores/esp8266/wiring_digital.c
@@ -27,19 +27,90 @@
 #define ARDUINO_MAIN
 #include "wiring_private.h"
 #include "pins_arduino.h"
+#include "eagle_soc.h"
+#include "gpio.h"
+
+#define PINCOUNT 16
+
+static const uint32_t g_pin_muxes[PINCOUNT] = {
+    [0] = PERIPHS_IO_MUX_GPIO0_U,
+    [1] = PERIPHS_IO_MUX_U0TXD_U,
+    [2] = PERIPHS_IO_MUX_GPIO2_U,
+    [3] = PERIPHS_IO_MUX_U0RXD_U,
+    [4] = PERIPHS_IO_MUX_GPIO4_U,
+    [5] = PERIPHS_IO_MUX_GPIO5_U,
+
+    // These 6 pins are used for SPI flash interface
+    [6] = 0,
+    [7] = 0,
+    [8] = 0,
+    [9] = 0,
+    [10] = 0,
+    [11] = 0,
+
+    [12] = PERIPHS_IO_MUX_MTDI_U,
+    [13] = PERIPHS_IO_MUX_MTCK_U,
+    [14] = PERIPHS_IO_MUX_MTMS_U,
+    [15] = PERIPHS_IO_MUX_MTDO_U,
+};
+
+static const uint32_t g_pin_funcs[PINCOUNT] = {
+    [0] = FUNC_GPIO0,
+    [1] = FUNC_GPIO1,
+    [2] = FUNC_GPIO2,
+    [3] = FUNC_GPIO3,
+    [4] = FUNC_GPIO4,
+    [5] = FUNC_GPIO5,
+    [12] = FUNC_GPIO12,
+    [13] = FUNC_GPIO13,
+    [14] = FUNC_GPIO14,
+    [15] = FUNC_GPIO15,
+};
+
 
 void pinMode(uint8_t pin, uint8_t mode)
 {
+    uint32_t mux = g_pin_muxes[pin];
+    if (mode == INPUT)
+    {
+        gpio_output_set(0, 0, 0, 1 << pin);
+        PIN_PULLUP_DIS(mux);
+    }
+    else if (mode == INPUT_PULLUP)
+    {
+        gpio_output_set(0, 0, 0, 1 << pin);
+        PIN_PULLUP_EN(mux);
+    }
+    else
+    {
+        gpio_output_set(0, 0, 1 << pin, 0);
+    }
 
 }
 
 void digitalWrite(uint8_t pin, uint8_t val)
 {
-
+    uint32_t set = ((val & 1) << pin);
+    uint32_t clr = (((~val) & 1) << pin);
+    gpio_output_set(set, clr, 0, 0);
 }
 
 int digitalRead(uint8_t pin)
 {
+    return ((gpio_input_get() >> pin) & 1);
+}
 
-	return LOW;
+void initPins()
+{
+    gpio_init();
+    for (int i = 0; i < PINCOUNT; ++i)
+    {
+        uint32_t mux = g_pin_muxes[i];
+        if (mux)
+        {
+            uint32_t func = g_pin_funcs[i];
+            PIN_FUNC_SELECT(mux, func);
+        }
+    }
 }
+
diff --git a/cores/esp8266/wiring_private.h b/cores/esp8266/wiring_private.h
@@ -34,13 +34,6 @@
 extern "C"{
 #endif
 
-#ifndef cbi
-#define cbi(sfr, bit) 
-#endif
-#ifndef sbi
-#define sbi(sfr, bit) 
-#endif
-
 #define EXTERNAL_INT_0 0
 #define EXTERNAL_INT_1 1
 #define EXTERNAL_INT_2 2
@@ -54,6 +47,8 @@ extern "C"{
 
 typedef void (*voidFuncPtr)(void);
 
+void initPins();
+
 #ifdef __cplusplus
 } // extern "C"
 #endif

diff --git a/variants/esp01/pins_arduino.h b/variants/esp01/pins_arduino.h
@@ -27,40 +27,17 @@
 
 #define PROGMEM
 
-#define NUM_DIGITAL_PINS  30
-#define NUM_ANALOG_INPUTS 12
+#define NUM_DIGITAL_PINS  16
+#define NUM_ANALOG_INPUTS 1
 
-#define TX_RX_LED_INIT	
-#define TXLED0			
-#define TXLED1			
-#define RXLED0			
-#define RXLED1			
+static const uint8_t SDA = 0;
+static const uint8_t SCL = 2;
 
-static const uint8_t SDA = 2;
-static const uint8_t SCL = 3;
-#define LED_BUILTIN 13
-
-// Map SPI port to 'new' pins D14..D17
-static const uint8_t SS   = 17;
-static const uint8_t MOSI = 16;
+static const uint8_t SS   = 12;
+static const uint8_t MOSI = 13;
 static const uint8_t MISO = 14;
 static const uint8_t SCK  = 15;
 
-// Mapping of analog pins as digital I/O
-// A6-A11 share with digital pins
-static const uint8_t A0 = 18;
-static const uint8_t A1 = 19;
-static const uint8_t A2 = 20;
-static const uint8_t A3 = 21;
-static const uint8_t A4 = 22;
-static const uint8_t A5 = 23;
-static const uint8_t A6 = 24;	// D4
-static const uint8_t A7 = 25;	// D6
-static const uint8_t A8 = 26;	// D8
-static const uint8_t A9 = 27;	// D9
-static const uint8_t A10 = 28;	// D10
-static const uint8_t A11 = 29;	// D12
-
 
 
 // These serial port names are intended to allow libraries and architecture-neutral