added basic code

1 files changed, 111 insertions, 0 deletions

diff --git a/arduino/cores/nRF5/HardwarePWM.h b/arduino/cores/nRF5/HardwarePWM.h
new file mode 100755
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+++ b/arduino/cores/nRF5/HardwarePWM.h
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+/**************************************************************************/
+/*!
+    @file     HardwarePWM.h
+    @author   hathach (tinyusb.org)
+
+    @section LICENSE
+
+    Software License Agreement (BSD License)
+
+    Copyright (c) 2018, Adafruit Industries (adafruit.com)
+    All rights reserved.
+
+    Redistribution and use in source and binary forms, with or without
+    modification, are permitted provided that the following conditions are met:
+    1. Redistributions of source code must retain the above copyright
+    notice, this list of conditions and the following disclaimer.
+    2. Redistributions in binary form must reproduce the above copyright
+    notice, this list of conditions and the following disclaimer in the
+    documentation and/or other materials provided with the distribution.
+    3. Neither the name of the copyright holders nor the
+    names of its contributors may be used to endorse or promote products
+    derived from this software without specific prior written permission.
+
+    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ''AS IS'' AND ANY
+    EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+    WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+    DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE FOR ANY
+    DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+    (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+    LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+    ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+    (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+    SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+/**************************************************************************/
+#ifndef HARDWAREPWM_H_
+#define HARDWAREPWM_H_
+
+#include "common_inc.h"
+#include "nrf.h"
+
+#ifdef NRF52840_XXAA
+#define HWPWM_MODULE_NUM    4
+#else
+#define HWPWM_MODULE_NUM    3
+#endif
+
+class HardwarePWM
+{
+  private:
+    enum { MAX_CHANNELS = 4 }; // Max channel per group
+    NRF_PWM_Type* _pwm;
+
+    uint16_t _seq0[MAX_CHANNELS];
+
+    uint16_t  _max_value;
+    uint8_t  _clock_div;
+
+    void _start(void);
+
+  public:
+    HardwarePWM(NRF_PWM_Type* pwm);
+
+    // Configure
+    void setResolution(uint8_t bitnum); // set max value by 2^bitnum - 1
+    void setMaxValue(uint16_t value);   // set max value
+
+    void setClockDiv(uint8_t div);      // value is PWM_PRESCALER_PRESCALER_DIV_x, DIV1 is 16Mhz
+
+    bool addPin     (uint8_t pin);
+    bool removePin  (uint8_t pin);
+
+    int  pin2channel(uint8_t pin)
+    {
+      pin = g_ADigitalPinMap[pin];
+      for(int i=0; i<MAX_CHANNELS; i++)
+      {
+        if ( _pwm->PSEL.OUT[i] == pin ) return i;
+      }
+      return (-1);
+    }
+
+    bool checkPin(uint8_t pin)
+    {
+      return pin2channel(pin) >= 0;
+    }
+
+    void begin (void);
+    bool enabled (void);
+    void stop  (void);
+
+    // Generate PWM
+    bool writePin    (uint8_t pin, uint16_t value, bool inverted = false);
+    bool writeChannel(uint8_t ch , uint16_t value, bool inverted = false);
+
+    // Read current set value
+    uint16_t readPin     (uint8_t pin);
+    uint16_t readChannel (uint8_t ch);
+};
+
+extern HardwarePWM HwPWM0;
+extern HardwarePWM HwPWM1;
+extern HardwarePWM HwPWM2;
+
+#ifdef NRF_PWM3
+extern HardwarePWM HwPWM3;
+#endif
+
+extern HardwarePWM* HwPWMx[];
+
+#endif /* HARDWAREPWM_H_ */