46 lines
1.5 KiB
C
46 lines
1.5 KiB
C
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/**
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* @file Key.h
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* @brief 4-bit keyboard connected to PB19-PB16
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* @details Lab 5. Digital Piano using a Digital to Analog Converter<br>
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* For more information see<br> https://docs.google.com/document/d/1DVmHjqsx24FvLp4x8KKyr5UmDeDlBlfeQPsVvKFQF_k/edit<br>
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* @version ECE319K Spring 2024
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* @author Your names go here
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* @copyright Lab solution, do not post,
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* @warning AS-IS
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* @date October 2, 2023
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<table>
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<caption id="Lab5inputpins">Pins on the 4-bit Keyboard</caption>
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<tr><th>Pin <th>GPIO<th>Hardware
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<tr><td>PB19 <td>input<td>bit 3 (note with highest frequency)
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<tr><td>PB18 <td>input<td>bit 2
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<tr><td>PB17 <td>input<td>bit 1
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<tr><td>PB16 <td>input<td>bit 0 (note with lowest frequency)
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</table>
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******************************************************************************/
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#ifndef __KEY_H__
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#define __KEY_H__
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/**
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* Initialize 4-bit keyboard
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* - Piano key 3 PB19 (note with highest frequency)
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* - Piano key 2 PB18
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* - Piano key 1 PB17
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* - Piano key 0 PB16 (note with lowest frequency)
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* @param none
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* @return none
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* @brief Initialize keyboard
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* @note LaunchPad_Init has been called; this program should not reset Port B
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*/
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void Key_Init(void);
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/**
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* Input from piano key inputs on PB19-PB16
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* @param none
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* @return 0 to 15 depending on keys
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* 0x01 is just Key0, 0x02 is just Key1, 0x04 is just Key2, 0x08 is just Key3
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* */
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uint32_t Key_In(void);
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#endif // __KEY_H__
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