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2026-06-12 02:55:04 -07:00
commit 30406f4f49
2040 changed files with 571534 additions and 0 deletions
--- a/RTOS_Labs_common/LaunchPad.c
+++ b/RTOS_Labs_common/LaunchPad.c
@@ -0,0 +1,144 @@
+/* LaunchPad.c
+ * Jonathan Valvano
+ * November 7, 2025
+ * RTOS version
+ * Derived from gpio_toggle_output_LP_MSPM0G3507_nortos_ticlang
+ */
+
+
+#include <ti/devices/msp/msp.h>
+#include "../RTOS_Labs_common/LaunchPad.h"
+
+void Delay(uint32_t cycles){
+    /* There will be a 2 cycle delay here to fetch & decode instructions
+     * if branch and linking to this function */
+
+    /* Subtract 2 net cycles for constant offset: +2 cycles for entry jump,
+     * +2 cycles for exit, -1 cycle for a shorter loop cycle on the last loop,
+     * -1 for this instruction */
+#ifdef __GNUC__
+    __asm(".syntax unified");
+#endif
+    __asm volatile(
+"            SUBS  R0, R0, #2; \n"
+"Delay_Loop: SUBS  R0, R0, #4; \n" // C=1 if no overflow
+"            NOP;              \n" // C=0 when R0 passes through 0
+"            BHS   Delay_Loop; \n"
+        /* Return: 2 cycles */
+    );
+}
+//  PA0 is red LED1,   index 0 in IOMUX PINCM table, negative logic
+// PB22 is BLUE LED2,  index 49 in IOMUX PINCM table
+// PB26 is RED LED2,   index 56 in IOMUX PINCM table
+// PB27 is GREEN LED2, index 57 in IOMUX PINCM table
+// PA18 is S1 positive logic switch,  index 39 in IOMUX PINCM table
+// PB21 is S2 negative logic switch,  index 48 in IOMUX PINCM table
+void ActivatePortA_B(void){
+    // Reset two GPIO peripherals
+    // RSTCLR
+    //   bits 31-24 unlock key 0xB1
+    //   bit 1 is Clear reset sticky bit
+    //   bit 0 is reset gpio port
+  GPIOA->GPRCM.RSTCTL = (uint32_t)0xB1000003;
+  GPIOB->GPRCM.RSTCTL = (uint32_t)0xB1000003;
+
+    // Enable power to two GPIO peripherals
+    // PWREN
+    //   bits 31-24 unlock key 0x26
+    //   bit 0 is Enable Power
+  GPIOA->GPRCM.PWREN = (uint32_t)0x26000001;
+  GPIOB->GPRCM.PWREN = (uint32_t)0x26000001;
+
+  Delay(24); // time for gpio to power up
+}
+// Initialize LEDs and switches
+// Input: none
+// Output:none
+void LaunchPad_Init(void){
+  ActivatePortA_B();
+
+// PINCM
+//   bit 25 is HiZ
+//   bit 20 is drive strength (only available for PA10 PA11 PA28 PA31)
+//   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[PA0INDEX]  = (uint32_t) 0x00000081;
+  IOMUX->SECCFG.PINCM[PA18INDEX] = (uint32_t) 0x00050081; // input, pull down
+  IOMUX->SECCFG.PINCM[PB21INDEX] = (uint32_t) 0x00060081; // input, pull up
+  IOMUX->SECCFG.PINCM[PB22INDEX] = (uint32_t) 0x00000081;
+  IOMUX->SECCFG.PINCM[PB26INDEX] = (uint32_t) 0x00000081;
+  IOMUX->SECCFG.PINCM[PB27INDEX] = (uint32_t) 0x00000081;
+// DOE31_0 Data output enable
+  GPIOA->DOE31_0 |= RED1;
+  GPIOB->DOE31_0 |= BLUE | RED | GREEN; // enable outputs
+// DOUT31_0 read/write data output pins
+  GPIOA->DOUT31_0 &= ~RED1; // LED1 off
+  GPIOB->DOUT31_0 &= ~(BLUE | RED | GREEN); // clear LED2
+}
+
+// **** LaunchPad_InS1 *****
+// Read S1,  positive logic switch on PA18
+// return 0 if S1 is not pressed
+//        0x00040000 if S1 is pressed
+uint32_t LaunchPad_InS1(void){ uint32_t data;
+  data = GPIOA->DIN31_0; // read all of Port A
+  data = data & S1;      // select bit 18
+  return data;
+}
+// **** LaunchPad_InS2 *****
+// Read S2,  negative logic switch on PB21
+// return 0 if S2 is not pressed
+//        0x00200000 if S2 is pressed
+uint32_t LaunchPad_InS2(void){ uint32_t data;
+  data = GPIOB->DIN31_0; // read all of Port B
+  data = data ^ S2;      // convert to positive logic
+  return data & S2;      // select bit 21
+}
+// **** LaunchPad_LED1 *****
+// Set LED1,  negative logic LED on PA0
+// Input led=0 to PA0=1, turn off LED1
+//       led=1 to PA0=0, turn on LED1
+void LaunchPad_LED1(uint32_t led){uint32_t data;
+  data = GPIOA->DOUT31_0; // read all of previous values
+  data = data & ~0x01;    // clear bit 0
+  data = data | (led^1);  // new value for bit 0
+  GPIOA->DOUT31_0 = data; // change bit 0
+}
+// **** LaunchPad_LED1on *****
+// Set LED1 on PA0, negative logic
+// Makes PA0=0 to turn on LED
+void LaunchPad_LED1on(void){
+  GPIOA->DOUTCLR31_0 = RED1;
+}
+// **** LaunchPad_LED1off *****
+// Set LED1 on PA0, negative logic
+// Makes PA0=1 to turn off LED
+void LaunchPad_LED1off(void){
+  GPIOA->DOUTSET31_0 = RED1;
+}
+// **** LaunchPad_LED *****
+// Set LED, 3-color positive logic LED on PB22,PB26,PB27
+// Input led=0 to turn off LED
+//       led bit 22 sets blue color
+//       led bit 26 sets red color
+//       led bit 27 sets green color
+void LaunchPad_LED(uint32_t led){uint32_t data;
+  data = GPIOB->DOUT31_0; // read all of previous values
+  data = data & ~(BLUE|RED|GREEN); // clear bits 22,26,27
+  data = data | led;      // new values for bits 22,26,27
+  GPIOB->DOUT31_0 = data; // change bits 22,26,27
+}
+// **** LaunchPad_LEDwhite *****
+// Set LED to white, 3-color positive logic LED on PB22,PB26,PB27
+void LaunchPad_LEDwhite(void){
+  GPIOB->DOUTSET31_0 = BLUE|RED|GREEN;
+}
+// **** LEDoff *****
+// turn off LED, 3-color positive logic LED on PB22,PB26,PB27
+void LaunchPad_LEDoff(void){
+  GPIOB->DOUTCLR31_0 = BLUE|RED|GREEN;
+}
+