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inc/Bump.c

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+// Bump.c
+// RSLK Bumper switches
+// negative logic internal pullup
+// June 28, 2024
+// TM4C MSPM0
+// PA5  PA27    Left, Bump 0,
+// PF0  PB15    Center Left, Bump 1,
+// PB3  PA28    Center Right, Bump 2
+// PC4  PA31    Right, Bump 3
+#include <ti/devices/msp/msp.h>
+#include "../inc/LaunchPad.h"
+void Bump_Init(void){
+  IOMUX->SECCFG.PINCM[PA27INDEX] = (uint32_t) 0x00060081; // input, pull up
+  IOMUX->SECCFG.PINCM[PB15INDEX] = (uint32_t) 0x00060081; // input, pull up
+  IOMUX->SECCFG.PINCM[PA28INDEX] = (uint32_t) 0x00060081; // input, pull up
+  IOMUX->SECCFG.PINCM[PA31INDEX] = (uint32_t) 0x00060081; // input, pull up
+}
+// bit 0 is left
+// bit 1 is left center
+// bit 2 is right center
+// bit 3 is right
+uint32_t Bump_In(void){
+    // bit 27 is left
+    // bit 15 is left center
+    // bit 28 is right center
+    // bit 31 is right
+  return
+    ((GPIOA->DIN31_0&(1<<27)>>(27-0))|  // PA27 into bit 0
+     (GPIOB->DIN31_0&(1<<15)>>(15-1))|  // PB15 into bit 1
+     (GPIOA->DIN31_0&(1<<28)>>(28-2))|  // PA28 into bit 2
+     (GPIOA->DIN31_0&(1<<31)>>(31-3)))  // PA31 into bit 3
+     ^0x0F; // convert to positive logic
+}