lab9/JoyStick.cpp at master · JasonKlm/lab9 · GitHub

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/* JoyStick.c
 * MKII BoosterPack
 * Jonathan Valvano
 * November 21, 2022
 * Derived from gpio_toggle_output_LP_MSPM0G3507_nortos_ticlang
 *              ADC1_single_conversion_vref_internal_LP_MSPM0G3507_nortos_ticlang
 *              ADC1_single_conversion_LP_MSPM0G3507_nortos_ticlang
 */


#include <ti/devices/msp/msp.h>
#include "JoyStick.h"
#include "../inc/Clock.h"
#include "ADC.h"
// Analog MKII  Joystick
// J1.5 joystick Select button (digital) PA26
// J1.2 joystick horizontal (X) (analog) PA25_ADC0.2
// J3.26 joystick vertical (Y) (analog)  PA18_ADC1.3
// remove J1 J2 J3 on LaunchPad to use PA26

// user buttons
// J4.33 user Button1 (bottom) (digital) PA12
// J4.32 user Button2 (top) (digital)    PA11 (conflicts with UART0 Rx from XDS Tx)

#define PA27INDEX 59
#define PB18INDEX 43
#define PB19INDEX 44
// Initialize MKII JoyStick and JoyStick button
void JoyStick_Init(void){
    ADC_InitDual(ADC1,5,6,0x000);
  // assume these are called from LaunchPad_Init
//  GPIOA->GPRCM.RSTCTL = (uint32_t)0xB1000003;  // Reset GPIOA
//  GPIOA->GPRCM.PWREN = (uint32_t)0x26000001;   // Enable power to GPIOA
  Clock_Delay(24); // time for gpio to power up

    // PINCM
    //   bit 25 is HiZ
    //   bit 20 is drive strength
    //   bit 18 is input enable control
    //   bit 17 is pull up control
    //   bit 16 is pull down control
    //   bit 7 is PC peripheral connected, enable transparent data flow
    //   bit 0 selects GPIO function
  IOMUX->SECCFG.PINCM[PA27INDEX]  = (uint32_t) 0x00040081;
  IOMUX->SECCFG.PINCM[PB18INDEX]  = (uint32_t) 0x00040081;
  IOMUX->SECCFG.PINCM[PB19INDEX]  = (uint32_t) 0x00040081;
}
#define JOYBUTTON (1<<27)
// Read JoyStick button
// Input: none
// Output: 0 if pressed, nonzero if not pressed
uint32_t JoyStick_InButton(void){
  return GPIOA->DIN31_0 & JOYBUTTON;
}

// Read JoyStick position
// Inputs: *x pointer to empty 32 bit unsigned variable
//         *y pointer to empty 32 bit unsigned variable
// Output: none
void JoyStick_In(uint32_t *x, uint32_t *y){
    ADC1->ULLMEM.CTL0 |= 0x00000001; // enable conversions
    ADC1->ULLMEM.CTL1 |= 0x00000100; // start ADC
    uint32_t volatile delay=ADC1->ULLMEM.STATUS; // time to let ADC start
    while((ADC1->ULLMEM.STATUS&0x01)==0x01){}; // wait for completion
    *x = ADC1->ULLMEM.MEMRES[1];
    *y = ADC1->ULLMEM.MEMRES[2];
}
#define BUTT1 (1<<12)
// Read Button1 button, PA12
// Input: none
// Output: 0 if pressed, nonzero if not pressed
uint32_t JoyStick_InButton1(void){
  return GPIOA->DIN31_0 & BUTT1;
}
//#define BUTT2 (1<<11)
// Read Button2 button, PA11
// Input: none
// Output: 0 if pressed, nonzero if not pressed
//uint32_t JoyStick_InButton2(void){
//  return GPIOA->DIN31_0 & BUTT2;
//}