60 lines
2.4 KiB
C
60 lines
2.4 KiB
C
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/* Key.c
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* Students put your names here
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* Modified: October 2, 2023
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* 4-bit keyboard connected to PB19-PB16
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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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*
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*/
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#include <ti/devices/msp/msp.h>
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#define PB16INDEX 32 // UART2_RX SPI1_SCK UART3_RTS TIMG8_C1 TIMG7_C1
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#define PB17INDEX 42 // UART2_TX SPI0_PICO SPI1_CS1 TIMA1_C0 TIMA0_C2
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#define PB18INDEX 43 // UART2_RX SPI0_SCK SPI1_CS2 TIMA1_C1 TIMA0_C2N
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#define PB19INDEX 44 // COMP2_OUT SPI0_POCI TIMG8_C1 UART0_CTS TIMG7_C1
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#include "../inc/LaunchPad.h"
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// **************Key_Init*********************
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// Initialize piano key inputs on PB19-PB16
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// Input: none
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// Output: none
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void Key_Init(void){
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// Assumes LaunchPad_Init has been called
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// I.e., PortB has already been reset and activated (do not reset PortB here again)
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// regular inputs
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// IOMUX->SECCFG.PINCM[PB16INDEX] = 0x00040081; // regular GPIO input
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// IOMUX->SECCFG.PINCM[PB17INDEX] = 0x00040081; // regular GPIO input
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// IOMUX->SECCFG.PINCM[PB18INDEX] = 0x00040081; // regular GPIO input
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// IOMUX->SECCFG.PINCM[PB19INDEX] = 0x00040081; // regular GPIO input
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// PCB camp board
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IOMUX->SECCFG.PINCM[PA28INDEX] = 0x00040081; // input, no pull
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IOMUX->SECCFG.PINCM[PA27INDEX] = 0x00040081; // input, no pull
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// IOMUX->SECCFG.PINCM[PA26INDEX] = 0x00040081; // input, no pull
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//IOMUX->SECCFG.PINCM[PA25INDEX] = 0x00040081; // input, no pull
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//IOMUX->SECCFG.PINCM[PA24INDEX] = 0x00040081; // input, no pull
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// red board
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// IOMUX->SECCFG.PINCM[PA16INDEX] = 0x00040081; // input, no pull
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// IOMUX->SECCFG.PINCM[PA15INDEX] = 0x00040081; // input, no pull
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// green board
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IOMUX->SECCFG.PINCM[PA17INDEX] = 0x00040081; // input, no pull
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IOMUX->SECCFG.PINCM[PA16INDEX] = 0x00040081; // input, no pull
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}
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// **************Key_In*********************
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// Input from piano key inputs on PB19-PB16
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// Input: none
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// Output: 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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uint32_t Key_In(void){
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// regular Lab5
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// return (GPIOB->DIN31_0>>16)&0x000F;
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uint32_t data = GPIOA->DIN31_0;
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// return (data>>24)&0x0F;
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// red board
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//return ((data>>15)&0x03) | ((data&((1<<28)|(1<<27)))>>25);
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// green board
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return ((data>>16)&0x03) | ((data&((1<<28)|(1<<27)))>>25);
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}
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