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inc/JoyStick.c

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+/* JoyStick.c
+ * MKII BoosterPack
+ * Jonathan Valvano
+ * November 21, 2022
+ * Derived from gpio_toggle_output_LP_MSPM0G3507_nortos_ticlang
+ *              adc12_single_conversion_vref_internal_LP_MSPM0G3507_nortos_ticlang
+ *              adc12_single_conversion_LP_MSPM0G3507_nortos_ticlang
+ */
+
+
+
+#include <ti/devices/msp/msp.h>
+#include "../inc/JoyStick.h"
+#include "../inc/Clock.h"
+#include "../inc/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 PA26INDEX 58
+#define PA11INDEX 21
+#define PA12INDEX 33
+// Initialize MKII JoyStick and JoyStick button
+void JoyStick_Init(void){
+  ADC_Init(ADC0,2,ADCVREF_VDDA); // x position joystick
+  ADC_Init(ADC1,3,ADCVREF_VDDA); // y position joystick
+  // 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[PA26INDEX]  = (uint32_t) 0x00040081;
+  IOMUX->SECCFG.PINCM[PA11INDEX]  = (uint32_t) 0x00040081;
+  IOMUX->SECCFG.PINCM[PA12INDEX]  = (uint32_t) 0x00040081;
+}
+#define JOYBUTTON (1<<26)
+// 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){
+  *x = ADC_In(ADC0);
+  *y = ADC_In(ADC1);
+}
+#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;
+//}