80 lines
2.6 KiB
C
80 lines
2.6 KiB
C
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/* JoyStick.c
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* MKII BoosterPack
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* Jonathan Valvano
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* November 21, 2022
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* Derived from gpio_toggle_output_LP_MSPM0G3507_nortos_ticlang
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* adc12_single_conversion_vref_internal_LP_MSPM0G3507_nortos_ticlang
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* adc12_single_conversion_LP_MSPM0G3507_nortos_ticlang
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*/
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#include <ti/devices/msp/msp.h>
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#include "../inc/JoyStick.h"
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#include "../inc/Clock.h"
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#include "../inc/ADC.h"
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// Analog MKII Joystick
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// J1.5 joystick Select button (digital) PA26
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// J1.2 joystick horizontal (X) (analog) PA25_ADC0.2
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// J3.26 joystick vertical (Y) (analog) PA18_ADC1.3
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// remove J1 J2 J3 on LaunchPad to use PA26
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// user buttons
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// J4.33 user Button1 (bottom) (digital) PA12
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// J4.32 user Button2 (top) (digital) PA11 (conflicts with UART0 Rx from XDS Tx)
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#define PA26INDEX 58
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#define PA11INDEX 21
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#define PA12INDEX 33
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// Initialize MKII JoyStick and JoyStick button
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void JoyStick_Init(void){
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ADC_Init(ADC0,2,ADCVREF_VDDA); // x position joystick
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ADC_Init(ADC1,3,ADCVREF_VDDA); // y position joystick
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// assume these are called from LaunchPad_Init
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// GPIOA->GPRCM.RSTCTL = (uint32_t)0xB1000003; // Reset GPIOA
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// GPIOA->GPRCM.PWREN = (uint32_t)0x26000001; // Enable power to GPIOA
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Clock_Delay(24); // time for gpio to power up
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// PINCM
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// bit 25 is HiZ
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// bit 20 is drive strength
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// bit 18 is input enable control
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// bit 17 is pull up control
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// bit 16 is pull down control
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// bit 7 is PC peripheral connected, enable transparent data flow
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// bit 0 selects GPIO function
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IOMUX->SECCFG.PINCM[PA26INDEX] = (uint32_t) 0x00040081;
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IOMUX->SECCFG.PINCM[PA11INDEX] = (uint32_t) 0x00040081;
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IOMUX->SECCFG.PINCM[PA12INDEX] = (uint32_t) 0x00040081;
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}
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#define JOYBUTTON (1<<26)
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// Read JoyStick button
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// Input: none
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// Output: 0 if pressed, nonzero if not pressed
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uint32_t JoyStick_InButton(void){
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return GPIOA->DIN31_0 & JOYBUTTON;
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}
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// Read JoyStick position
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// Inputs: *x pointer to empty 32 bit unsigned variable
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// *y pointer to empty 32 bit unsigned variable
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// Output: none
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void JoyStick_In(uint32_t *x, uint32_t *y){
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*x = ADC_In(ADC0);
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*y = ADC_In(ADC1);
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}
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#define BUTT1 (1<<12)
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// Read Button1 button, PA12
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// Input: none
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// Output: 0 if pressed, nonzero if not pressed
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uint32_t JoyStick_InButton1(void){
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return GPIOA->DIN31_0 & BUTT1;
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}
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//#define BUTT2 (1<<11)
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// Read Button2 button, PA11
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// Input: none
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// Output: 0 if pressed, nonzero if not pressed
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//uint32_t JoyStick_InButton2(void){
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// return GPIOA->DIN31_0 & BUTT2;
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//}
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