project additions/changes

labW9barnestr/Inc/delay.h

@@ -0,0 +1,37 @@
+/*
+ * delay.h
+ *
+ * Created on: Dec 10, 2021
+ * Author: Trevor Barnes
+ */
+
+//include guards
+#ifndef DELAY_H_
+#define DELAY_H_
+
+#include <inttypes.h>
+
+#define STK_CTRL (volatile uint32_t*) 0xE000E010
+#define STK_LOAD (volatile uint32_t*) 0xE000E014
+#define STK_VAL (volatile uint32_t*) 0xE000E018
+
+#define EN 1
+#define TICKINT (1<<1)
+#define CLKSOURCE (1<<2)
+#define COUNTFLAG (1<<16)
+
+/*
+ * delay_1ms
+ * 		Busy wait for n ms
+ *
+ * 		For n iterations
+ * 			load number of cycles for 1 ms
+ * 			set one to enable and clock source
+ *
+ * 			wait for countflag to be set
+ */
+void delay_1ms(uint32_t n);
+
+
+
+#endif /* DELAY_H_ */

labW9barnestr/Inc/led.h

@@ -0,0 +1,101 @@
+/*
+ * led.h
+ *
+ * Created on: Dec 10, 2021
+ * Author: Trevor Barnes
+ */
+
+#ifndef LED_H_
+#define LED_H_
+
+#include <inttypes.h>
+
+#define RCC_AHB1ENR (volatile uint32_t*) 0x40023830
+#define GPIOBEN 1
+#define GPIOB_MODER (volatile uint32_t*) 0x40020400
+#define GPIOB_PUPDR (volatile uint32_t*) 0x4002040C
+#define GPIOB_IDR (volatile uint32_t*) 0x40020410
+#define GPIOB_ODR (volatile uint32_t*) 0x40020414
+#define GPIOB_BSRR (volatile uint32_t*) 0x40020418
+
+#define ALL_LEDS (0b11110111111<<5)
+
+/*
+ * led_init()
+ * This function should:
+ * 		1. Enable the GPIOB in RCC_AHB1ENR
+ * 		2. Turn on to set LED0 - LED9 to output mode ("01")
+ */
+void led_init();
+
+/*
+ * led_allOn()
+ * 		1. Turn on all leds (hint use ODR or BSRR)
+ * 		Note you should not effect other pins on PortB
+ */
+void led_allOn();
+
+/*
+ * led_allOff()
+ * 		1. Turn off all leds (hint use ODR or BSRR)
+ * 		Note you should not effect other pins on PortB
+ */
+void led_allOff();
+
+/*
+ * led_on()
+ * 		Args: 0-9 to turn on specific led
+ * 		print error message is arg is out of range
+ */
+void led_on(uint8_t ledIndex);
+
+/*
+ * led_off()
+ * 		Args: 0-9 to turn off specific led
+ * 		print error message is arg is out of range
+ */
+void led_off(uint8_t ledIndex);
+
+
+/*
+ * led_scan()
+ * 		Scan the light across and back at the current speed
+ */
+void led_scan();
+
+/*
+ * led_flash()
+ * 		flash all of the lights 10 times at the current speed
+ */
+void led_flash();
+
+/*
+ * led_setSpeed (uint8_t speed)
+ * 		arg: speed (0 slow - 9 fast)
+ * 		Args out of range should print error to console
+ */
+void led_setSpeed(uint8_t speed);
+
+/*
+ * led_incSpeed()
+ * 		increases the speed by one
+ * 		if maxed out leaves the speed at the max value
+ */
+void led_incSpeed();
+
+/*
+ * led_decSpeed()
+ * 		decreases the speed by one
+ * 		if at zero should stay at zero
+ */
+void led_decSpeed();
+
+/*
+ * getCurrentSpeed
+ * 		returns the current speed
+ */
+uint8_t getCurrentSpeed();
+
+
+
+#endif

labW9barnestr/Inc/tasker.h

@@ -0,0 +1,41 @@
+/**
+ * @file tasker.h
+ * @author Trevor Barnes
+ * @brief 
+ * @version 0.1
+ * @date 2022-02-11
+ * 
+ * @copyright Copyright (c) 2022
+ * 
+ */
+
+#include <inttypes.h>
+
+typedef enum{PAUSED, ACTIVE} task_state;
+
+#define SCB_ICSR 0xE000D04
+#define PENDSVSET 28
+
+extern int num_tasks;
+extern int current_task;
+extern int next_task;
+extern Task tasks[];
+
+
+typedef struct {
+    uint32_t* stack_pointer;
+    uint32_t ticks_starting;
+    uint32_t ticks_remaining;
+    task_state state;
+} Task;
+
+void SysTick_Init();
+
+void tasker_tick();
+
+void init_tasker(uint32_t total_tasks, uint32_t main_ticks);
+
+void init_task(uint32_t task_num, uint32_t stacksize, 
+               void(*entry_point)(void), uint32_t ticks);
+
+void PendSV_Handler(void __attribute__((naked)));

labW9barnestr/Inc/uart_driver.h

@@ -0,0 +1,49 @@
+/*
+ * uart_driver.h
+ *
+ *  Created on: Nov 8, 2016
+ *      Author: barnekow
+ */
+
+#ifndef UART_DRIVER_H_
+#define UART_DRIVER_H_
+
+#include <inttypes.h>
+
+// RCC registers
+#define RCC_APB1ENR (volatile uint32_t*) 0x40023840
+#define RCC_AHB1ENR (volatile uint32_t*) 0x40023830
+
+#define GPIOAEN 0		// GPIOA Enable is bit 0 in RCC_APB1LPENR
+#define USART2EN 17  // USART2 enable is bit 17 in RCC_AHB1LPENR
+
+// GPIOA registers
+#define GPIOA_MODER (volatile uint32_t*) 0x40020000
+#define GPIOA_AFRL  (volatile uint32_t*) 0x40020020
+#define USART_SR    (volatile uint32_t*) 0x40004400
+#define USART_DR    (volatile uint32_t*) 0x40004404
+#define USART_BRR   (volatile uint32_t*) 0x40004408
+#define USART_CR1   (volatile uint32_t*) 0x4000440c
+#define USART_CR2   (volatile uint32_t*) 0x40004410
+#define USART_CR3   (volatile uint32_t*) 0x40004414
+
+// CR1 bits
+#define UE 13 //UART enable
+#define TE 3  // Transmitter enable
+#define RE 2  // Receiver enable
+
+// Status register bits
+#define TXE 7  // Transmit register empty
+#define RXNE 5  // Receive register is not empty..char received
+
+// Function prototypes
+extern void init_usart2(uint32_t baud, uint32_t sysclk);
+extern char usart2_getch();
+extern void usart2_putch(char c);
+
+// syscalls overrides
+int _read(int file, char *ptr, int len);
+int _write(int file, char *ptr, int len);
+
+
+#endif /* UART_DRIVER_H_ */