First init.

libraries/Adafruit_seesaw_Library/Adafruit_TFTShield18.cpp

@@ -0,0 +1,65 @@
+#include "Adafruit_TFTShield18.h"
+
+/**************************************************************************/
+/*!
+    @brief  set up the TFT shield
+    @param  addr optional address the seesaw chip can be found on
+    @param  flow optional flow control pin to use
+    @returns true on success, false on error
+*/
+/**************************************************************************/
+bool Adafruit_TFTShield18::begin(uint8_t addr, int8_t flow) {
+  if (!Adafruit_seesaw::begin(addr, flow)) {
+    return false;
+  }
+
+  pinMode(TFTSHIELD_RESET_PIN, OUTPUT);
+  pinModeBulk(TFTSHIELD_BUTTON_ALL, INPUT_PULLUP);
+  return true;
+}
+
+/**************************************************************************/
+/*!
+    @brief  set the intensity of the backlight
+    @param  value to set the backlight to,
+                        0x0000 = 0% 	(TFTSHIELD_BACKLIGHT_OFF)
+                          to
+                        0xFFFF = 100%	(TFTSHIELD_BACKLIGHT_ON)
+
+*/
+/**************************************************************************/
+void Adafruit_TFTShield18::setBacklight(uint16_t value) {
+  uint8_t cmd[] = {0x00, (uint8_t)(value >> 8), (uint8_t)value};
+  this->write(SEESAW_TIMER_BASE, SEESAW_TIMER_PWM, cmd, 3);
+}
+
+/**************************************************************************/
+/*!
+    @brief  set the PWM frequency for the backlight
+    @param  freq the frequency to set the backlight to
+*/
+/**************************************************************************/
+void Adafruit_TFTShield18::setBacklightFreq(uint16_t freq) {
+  uint8_t cmd[] = {0x0, (uint8_t)(freq >> 8), (uint8_t)freq};
+  this->write(SEESAW_TIMER_BASE, SEESAW_TIMER_FREQ, cmd, 3);
+}
+
+/**************************************************************************/
+/*!
+    @brief  reset the TFT screen by setting the value of the reset pin
+    @param  rst the value to set the reset pin to
+*/
+/**************************************************************************/
+void Adafruit_TFTShield18::tftReset(bool rst) {
+  digitalWrite(TFTSHIELD_RESET_PIN, rst);
+}
+
+/**************************************************************************/
+/*!
+    @brief  read all buttons on the wing and return as a 32 bit integer
+    @returns the value of the buttons
+*/
+/**************************************************************************/
+uint32_t Adafruit_TFTShield18::readButtons() {
+  return digitalReadBulk(TFTSHIELD_BUTTON_ALL);
+}