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28
labW5barnestr/Src/delay.c
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28
labW5barnestr/Src/delay.c
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/*
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* delay.c
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*
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* Created on: Dec 10, 2021
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* Author: Trevor Barnes
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*/
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#include <inttypes.h>
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#include "delay.h" //include declaration header file
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void delay_1ms(uint32_t n){
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// 1ms = 16,000 ticks
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for (int i = n ; i > 0 ; i--) {
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// Clear value register
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*STK_VAL = 0x0000;
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// Store 16,000 in STK_LOAD
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*STK_LOAD = 16000;
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// Enable clock, no prescaler, no interrupt
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*STK_CTRL |= CLKSOURCE;
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*STK_CTRL |= EN;
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// Loop n times: Wait for countflag high
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int flag;
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do {
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flag = ((*STK_CTRL & (1<<16))>>16);
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} while (flag != 1);
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}
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}
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147
labW5barnestr/Src/led.c
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147
labW5barnestr/Src/led.c
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/*
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* led.c
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*
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* Created on: Dec 10, 2021
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* Author: Trevor Barnes
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*/
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#include "led.h"
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#include "delay.h"
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#include <inttypes.h>
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#include <stdio.h>
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int ledSpeed = 5;
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void led_init(){
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// Initialize corresponding RCC and GPIO registers
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*RCC_AHB1ENR |= (1<<GPIOBEN);
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*GPIOB_MODER &= ~(0x3FFF<<10);
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*GPIOB_MODER |= (0x555<<10);
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*GPIOB_MODER &= ~(0xFF<<24);
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*GPIOB_MODER |= (0x55<<24);
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}
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void led_allOn(){
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// Set all LED Bits
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*GPIOB_ODR |= ALL_LEDS;
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}
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void led_allOff(){
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// Reset all LED bits
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*GPIOB_ODR &= ~(ALL_LEDS);
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}
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void led_on(uint8_t ledIndex){
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// Set individual LED based on passed in index
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switch (ledIndex) {
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case 0:
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*GPIOB_BSRR = (1<<5);
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break;
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case 1:
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*GPIOB_BSRR = (1<<6);
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break;
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case 2:
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*GPIOB_BSRR = (1<<7);
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break;
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case 3:
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*GPIOB_BSRR = (1<<8);
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break;
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case 4:
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*GPIOB_BSRR = (1<<9);
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break;
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case 5:
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*GPIOB_BSRR = (1<<10);
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break;
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case 6:
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*GPIOB_BSRR = (1<<12);
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break;
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case 7:
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*GPIOB_BSRR = (1<<13);
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break;
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case 8:
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*GPIOB_BSRR = (1<<14);
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break;
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case 9:
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*GPIOB_BSRR = (1<<15);
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break;
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default:
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printf("LED index out of range\n\r");
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break;
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}
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}
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void led_off(uint8_t ledIndex){
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// Reset individual LED based on passed in index
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if (ledIndex < 6) {
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*GPIOB_BSRR = (1<<(21+ledIndex));
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} else if (ledIndex >= 6) {
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// Add pin offset to index
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*GPIOB_BSRR = (1<<(22+ledIndex));
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} else {
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printf("LED index out of range\n\r");
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}
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}
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void led_scan(){
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led_allOff();
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// Right to left each LED
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for (int i = 0; i <= 9 ; i++) {
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// Scaled Delay
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delay_1ms(50+(ledSpeed*50));
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if(i != 0){
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led_off(i-1);
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}
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led_on(i);
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}
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// Left to right each LED
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for (int i = 9; i >= 0; i--) {
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if(i != 9){
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led_off(i+1);
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}
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led_on(i);
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// Scaled Delay
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delay_1ms(50+(ledSpeed*50));
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}
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led_off(0);
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}
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void led_flash(){
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// Flash LED on and off 10 times at a speed between 0-1 seconds
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for (int i = 0; i < 10; i++) {
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led_allOn();
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delay_1ms(100+(ledSpeed*100));
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led_allOff();
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delay_1ms(100+(ledSpeed*100));
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}
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}
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void led_setSpeed(uint8_t speed){
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ledSpeed = speed;
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}
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void led_incSpeed(){
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if (ledSpeed == 0){
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printf("Speed too fast\n\r");
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} else {
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ledSpeed--;
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}
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}
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void led_decSpeed(){
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if (ledSpeed == 9){
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printf("Speed too slow\n\r");
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} else {
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ledSpeed++;
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}
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}
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uint8_t getCurrentSpeed()
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{
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return ledSpeed;
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}
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138
labW5barnestr/Src/main.c
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138
labW5barnestr/Src/main.c
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@@ -0,0 +1,138 @@
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/*
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* main.c
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*
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* Created on: January 12, 2022
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* Author: Trevor Barnes
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <math.h>
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#include "uart_driver.h"
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#include "memory.h"
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#include "delay.h"
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#include "piezoSpeaker.h"
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#define F_CPU 16000000UL
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// Imperial March
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Note t1n1 ={A3, Q}, t1n2 ={r, Q}, t1n3 ={A3, Q}, t1n4 ={r, Q}, t1n5 ={A3, Q}, t1n6 ={r, Q},
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t1n7 ={F3,E+S}, t1n9 ={r, E+S}, t1n10 ={C4, S}, t1n11 ={r, S}, t1n12 ={A3, Q}, t1n13 ={r, Q},
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t1n14 ={F3,E+S}, t1n15 ={r, E+S}, t1n16 ={C4, S}, t1n17 ={r, S}, t1n18 ={A3, H}, t1n19 ={r, H},
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t1n20 ={E4, Q}, t1n21 ={r, Q}, t1n22 ={E4, Q}, t1n23 ={r, Q}, t1n24 ={E4, Q}, t1n25 ={r, Q},
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t1n26 ={F4,E+S}, t1n27 ={r, E+S}, t1n28 ={C4, S}, t1n29 ={r, S}, t1n30 ={Ab3, Q}, t1n31 ={r, Q},
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t1n32 ={F3,E+S}, t1n33 ={r, E+S}, t1n34 ={C4, S}, t1n35 ={r, S}, t1n36 ={A3, H}, t1n37 ={r, H},
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t1n38 ={A4, Q}, t1n39 ={r, Q}, t1n40 ={A3, E+S}, t1n41 ={r, E+S}, t1n42 ={A3, S}, t1n43 ={r, S},
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t1n44 ={A4, Q}, t1n45 ={r, Q}, t1n46 ={Ab4,E+S}, t1n47 ={r, E+S}, t1n48 ={G4, S}, t1n49 ={r, S},
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t1n50 ={Gb4, Q}, t1n51 ={r, S}, t1n52 ={E4, S}, t1n53 ={r, S}, t1n54 ={F4, E}, t1n55 ={r, E},
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t1n56 ={r, E}, t1n57 ={Bb3, E}, t1n58 ={r, E}, t1n59 ={Eb4, Q}, t1n60 ={r, Q}, t1n61 ={D4,E+S},
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t1n62 ={r, E+S}, t1n63 ={Db4, S}, t1n137={r, H}, t1n64 ={C4, S}, t1n65 ={r, S}, t1n66 ={B3, S},
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t1n67 ={r, S}, t1n68 ={C4, E}, t1n69 ={r, E}, t1n70 ={r, E}, t1n71 ={F3, E}, t1n72 ={r, E},
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t1n73 ={Ab3, Q}, t1n74 ={r, Q}, t1n75 ={F3, E+S}, t1n76 ={r, E+S}, t1n77 ={A3, S}, t1n78 ={r, S},
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t1n79 ={C4, Q}, t1n80 ={r, Q}, t1n81 ={A3, E+S}, t1n82 ={r, E+S}, t1n83 ={C4, S}, t1n84 ={r, S},
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t1n85 ={E4, H}, t1n86 ={r, H}, t1n87 ={A4, Q}, t1n88 ={r, Q}, t1n89 ={A3, E+S}, t1n90 ={r, E+S},
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t1n91 ={A3, S}, t1n92 ={r, S}, t1n93 ={A4, Q}, t1n94 ={r, S}, t1n95 ={Ab4,E+S}, t1n96 ={r, E+S},
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t1n97 ={G4, S}, t1n98 ={r, S}, t1n99 ={Gb4, S}, t1n100={r, S}, t1n101={E4, S}, t1n102={r, S},
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t1n103={F4, E}, t1n104={r, E}, t1n105={r, E}, t1n106={Bb3, E}, t1n107={r, E}, t1n108={Eb4, Q},
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t1n109={r, Q}, t1n110={D4,E+S}, t1n111={r, E+S}, t1n112={Db4, S}, t1n113={r, S}, t1n114={C4, S},
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t1n115={r, S}, t1n116={B3, S}, t1n117={r, S}, t1n118={C4, E}, t1n119={r, E}, t1n120={r, E},
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t1n121={F3, E}, t1n122={r, E}, t1n123={Ab3, Q}, t1n124={r, Q}, t1n125={F3, E+S}, t1n126={r, E+S},
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t1n127={C4, S}, t1n128={r, S}, t1n129={A3, Q}, t1n130={r, Q}, t1n131={F3, E+S}, t1n132={r, E+S},
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t1n133={C4, S}, t1n134={r, S}, t1n135={A3, H}, t1n136={r, H};
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// Super Mario "Flagpole Fanfare"
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Note t2n1 ={G3, S/3}, t2n46={Ab3,S/3}, t2n2 ={A3, S/3}, t2n47={Bb3,S/3}, t2n3 ={B3,S/3},
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t2n4 ={C4, S/3}, t2n48={Db4,S/3}, t2n5 ={D4, S/3}, t2n49={Eb4,S/3}, t2n6 ={E4,S/3},
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t2n7 ={F4, S/3}, t2n50={Gb4,S/3}, t2n8 ={G4, S/3}, t2n51={Ab4,S/3}, t2n9 ={A4,S/3},
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t2n52={Bb4,S/3}, t2n10={B4, S/3}, t2n11={C5, S/3}, t2n53={Db5,S/3}, t2n12={D5,S/3},
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t2n54={Eb5,S/3}, t2n13={E5, S/3}, t2n14={F5, S/3}, t2n55={Gb5,S/3}, t2n15={G5,S/3},
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t2n56={Ab5,S/3}, t2n16={A5, S/3}, t2n57={Bb5,S/3}, t2n17={B5, S/3}, t2n18={C6,S/3},
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t2n58={Db6,S/3}, t2n19={D6, S/3}, t2n59={Eb6,S/3}, t2n20={E6, S/3}, t2n21={F6,S/3},
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t2n60={Eb6,S/3}, t2n22={G6, S/3}, t2n23={r, 7*S}, t2n24={G3, Q}, t2n25={C4, Q},
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t2n26={E4, Q}, t2n27={G4, Q}, t2n28={C5, Q}, t2n29={E5, Q}, t2n30={G5, H},
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t2n31={E5, H}, t2n32={Ab3, Q}, t2n33={C4, Q}, t2n34={Eb4, Q}, t2n35={Ab4, Q},
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t2n36={C5, Q}, t2n37={Eb5, Q}, t2n38={Ab6, H}, t2n39={Eb5, H}, t2n40={Bb3, Q},
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t2n41={D4, Q}, t2n42={F4, Q}, t2n43={Bb4, Q}, t2n44={D5, Q}, t2n45={F5, Q},
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t2n61={Bb5, W}, t2n62={B5, Q}, t2n63={B5, Q}, t2n64={B5, Q}, t2n65={C6, W};
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void printHelp() {
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printf("*Commands*\n\r");
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printf("'rmw {hex address}' - Reads mem at a given address\n\r");
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printf("'wmw {hex address} {value}' - Writes the given value as a word to the given address\n\r");
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printf("'dm {hex address} {length}' - Dumps the memory at a given address. Defaults to 16 B if no "
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"length is given\n\r");
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printf("'ps {song choice}' - Plays a song with the given selection\n\r");
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printf("'songs' - Prints info about each song selection\n\r");
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}
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void songInfo() {
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printf("Type 1 or 2 to play a song!\n\r");
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printf("Song 1: Imperial March\n\r");
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printf("Song 2: Super Mario Bros Flagpole Fanfare\n\r");
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}
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int main(void) {
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init_usart2(57600, F_CPU);
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piezo_init();
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led_init();
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// Inititialize Imperial March Note Array
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Note song1[137]={t1n1, t1n2, t1n3, t1n4, t1n5, t1n6, t1n7, t1n9, t1n10, t1n11, t1n12, t1n13, t1n14, t1n15,
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t1n16, t1n17, t1n18, t1n19, t1n20, t1n21, t1n22, t1n23, t1n24, t1n25, t1n26, t1n27, t1n28, t1n29,
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t1n30, t1n31, t1n32, t1n33, t1n34, t1n35, t1n36, t1n37, t1n38, t1n39, t1n40, t1n41, t1n42, t1n43,
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t1n44, t1n45, t1n46, t1n47, t1n48, t1n49, t1n50, t1n51, t1n52, t1n53, t1n54, t1n55, t1n56, t1n57,
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t1n58, t1n59, t1n60, t1n61, t1n62, t1n63, t1n137,t1n64, t1n65, t1n66, t1n67, t1n68, t1n69, t1n70,
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t1n71, t1n72, t1n73, t1n74, t1n75, t1n76, t1n77, t1n78, t1n79, t1n80, t1n81, t1n82, t1n83, t1n84,
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t1n85, t1n86, t1n87, t1n88, t1n89, t1n90, t1n91, t1n92, t1n93, t1n94, t1n95, t1n96, t1n97, t1n98,
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t1n99, t1n100,t1n101,t1n102,t1n103,t1n104,t1n105,t1n106,t1n107,t1n108,t1n109,t1n110,t1n111,t1n112,
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t1n113,t1n114,t1n115,t1n116,t1n117,t1n118,t1n119,t1n120,t1n121,t1n122,t1n123,t1n124,t1n125,t1n126,
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t1n127,t1n128,t1n129,t1n130,t1n131,t1n132,t1n133,t1n134,t1n135,t1n136};
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int song1Size = sizeof(song1)/sizeof(song1[0]);
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// Initialize Super Mario Note Array
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Note song2[65]={t2n1, t2n46,t2n2, t2n47,t2n3, t2n4, t2n48,t2n5, t2n49,t2n6, t2n7, t2n50,t2n8, t2n51,t2n9, t2n52,
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t2n10,t2n11,t2n53,t2n12,t2n54,t2n13,t2n14,t2n55,t2n15,t2n56,t2n16,t2n57,t2n17,t2n18,t2n58,t2n19,t2n59,
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t2n20,t2n21,t2n60,t2n22,t2n23,t2n24,t2n25,t2n26,t2n27,t2n28,t2n29,t2n30,t2n31,t2n32,t2n33,t2n34,t2n35,
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t2n36,t2n37,t2n38,t2n39,t2n40,t2n41,t2n42,t2n43,t2n44,t2n45,t2n61,t2n62,t2n63,t2n64,t2n65};
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int song2Size = sizeof(song2)/sizeof(song2[0]);
|
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char line[50];
|
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char command[10];
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int address;
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int data;
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||||
static int length;
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static int songSelection;
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for(;;) {
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// Get command from user
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fgets(line, 100, stdin);
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// Parse only the command for strcmp
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sscanf(line, "%s", command);
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if (!strcmp(command, "help")) {
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printHelp();
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} else if (!strcmp(command, "songs")) {
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songInfo();
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} else if (!strcmp(command, "rmw")) {
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sscanf(line, "%s %X", command, &address);
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readMem(address);
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} else if (!strcmp(command, "wmw")) {
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sscanf(line, "%s %X %u", command, &address, &data);
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writeMem(address, data);
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||||
} else if (!strcmp(command, "dm")) {
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sscanf(line, "%s %X %u", command, &address, &length);
|
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dumpMem(address, length);
|
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} else if (!strcmp(command, "ps")) {
|
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sscanf(line, "%s %u", command, &songSelection);
|
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switch(songSelection) {
|
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case 1:
|
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printf("Playing Imperial March\n\r");
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play_song(&song1[0], song1Size);
|
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break;
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case 2:
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||||
printf("Playing Super Mario Bros Flagpole Fanfare\n\r");
|
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play_song(&song2[0], song2Size);
|
||||
break;
|
||||
default:
|
||||
break;
|
||||
}
|
||||
} else {
|
||||
printf("Invalid input, type 'help' for instructions\n\r");
|
||||
}
|
||||
}
|
||||
}
|
||||
66
labW5barnestr/Src/memory.c
Normal file
66
labW5barnestr/Src/memory.c
Normal file
@@ -0,0 +1,66 @@
|
||||
/**
|
||||
* @file memory.c
|
||||
* @author Trevor Barnes
|
||||
* @brief
|
||||
* @version 0.1
|
||||
* @date 2022-01-19
|
||||
*
|
||||
* @copyright Copyright (c) 2022
|
||||
*
|
||||
*/
|
||||
|
||||
#include <stdio.h>
|
||||
#include <inttypes.h>
|
||||
#include "memory.h"
|
||||
|
||||
#define F_CPU 16000000UL
|
||||
|
||||
void initMemConsole() {
|
||||
init_usart2(57600, F_CPU);
|
||||
printf("Memory Console Initialized! Type 'help' for info.\n\r");
|
||||
}
|
||||
|
||||
void readMem(uint32_t addr) {
|
||||
// Assign and casts a new int pointer the value of addr
|
||||
uint32_t * memPtr = (uint32_t *)addr;
|
||||
// Formatted print with both hex and decimal values
|
||||
printf("Memory Value at %#08x\n\r"
|
||||
"Hex: %#08x\n\r"
|
||||
"Decimal: %d\n\r", addr, *memPtr, *memPtr);
|
||||
return;
|
||||
}
|
||||
|
||||
void writeMem(uint32_t addr, uint32_t data) {
|
||||
// Assign and casts a new int pointer the value of addr
|
||||
uint32_t * memPtr = (uint32_t *)addr;
|
||||
// Write data
|
||||
*memPtr = data;
|
||||
// Confirmation printout showing the new value and address
|
||||
printf("Value written at %#08x: %u \n\r", addr, data);
|
||||
return;
|
||||
}
|
||||
|
||||
|
||||
void dumpMem(uint32_t addr, int length) {
|
||||
// Set length to default value if length is negative
|
||||
// (No limit or protection for large, overflow values yet)
|
||||
if(length <= 0) {
|
||||
length = 16;
|
||||
printf("Length set to default! (16)\n\r");
|
||||
}
|
||||
// Assign and casts a new int pointer the value of addr
|
||||
uint8_t * memPtr = (uint8_t *)addr;
|
||||
// Loop that executes each read and print operation
|
||||
for(int i=0 ; i < length ; i++) {
|
||||
// Print newline and memory location every 16 bytes
|
||||
if((i % 16) == 0) {
|
||||
printf("\n\r%p:", memPtr);
|
||||
}
|
||||
// Print each byte
|
||||
printf(" %02X", *memPtr);
|
||||
// Iterate pointer to next byte
|
||||
memPtr++;
|
||||
}
|
||||
printf("\n\r");
|
||||
return;
|
||||
}
|
||||
76
labW5barnestr/Src/piezoSpeaker.c
Normal file
76
labW5barnestr/Src/piezoSpeaker.c
Normal file
@@ -0,0 +1,76 @@
|
||||
/**
|
||||
* @file piezoSpeaker.c
|
||||
* @author Trevor Barnes
|
||||
* @brief
|
||||
* @version 0.1
|
||||
* @date 2022-01-19
|
||||
*
|
||||
* @copyright Copyright (c) 2022
|
||||
*
|
||||
*/
|
||||
|
||||
#include <stdio.h>
|
||||
#include <inttypes.h>
|
||||
#include "piezoSpeaker.h"
|
||||
#include "delay.h"
|
||||
|
||||
|
||||
void piezo_init(){
|
||||
|
||||
//enable GPIOB and Timer 3 RCC
|
||||
*RCC_AHB1ENR |= (1<<GPIOBEN);
|
||||
*RCC_APB1ENR |= (1<<TIM3_EN);
|
||||
|
||||
//set GPIO B to alternate function (0b10<<9)
|
||||
//clears the two bits and then set it
|
||||
*GPIOB_MODER = (*GPIOB_MODER&~(0b11<<8)) | (PB4_AF_V<<8);
|
||||
|
||||
//set alternate function low register to TIM3
|
||||
*GPIOB_AFRL |= (1<<AFRL_TIM3_CH1_EN);
|
||||
|
||||
//Configure capture/compare mode register configuration
|
||||
//to enable preload and set to pwm
|
||||
*TIM3_CCMR1 |= OC1M_PWM2;
|
||||
*TIM3_CCMR1 |= (1<<OC1PE);
|
||||
|
||||
//Configure CCER to enable timer 3 as output capture
|
||||
*TIM3_CCER |= CCER_CC1E;
|
||||
|
||||
//Configure control register to enable preload
|
||||
*TIM3_CR1 |= (1<<CR_ARPE_EN);
|
||||
|
||||
}
|
||||
|
||||
|
||||
void play_note(double frequency, double duration){
|
||||
|
||||
|
||||
*TIM3_PSC = 15;
|
||||
//Divisor controls pitch
|
||||
*TIM3_ARR = mil/frequency;
|
||||
|
||||
//Loudness (Smaller dividend = louder sound)
|
||||
double freq = frequency/10;
|
||||
|
||||
//clear ccr1
|
||||
*TIM3_CCR1 = (*TIM3_CCR1&~(0xFFFF));
|
||||
*TIM3_CCR1 = freq;
|
||||
|
||||
//set EGR (accept only a byte of info so steps)
|
||||
*TIM3_EGR |= EGR_UG;
|
||||
|
||||
//~~~Plays the notes
|
||||
//Enables enable bit control register
|
||||
*TIM3_CR1 |= 1;
|
||||
//delay that leaves the speaker on for desired amount of time
|
||||
delay_1ms(duration);
|
||||
//Disables enable bit
|
||||
*TIM3_CR1 &= ~1;
|
||||
}
|
||||
|
||||
|
||||
void play_song(Note *song, int size){
|
||||
for(int i = 0; i < size; i++){
|
||||
play_note(song[i].freq, song[i].duration);
|
||||
}
|
||||
}
|
||||
92
labW5barnestr/Src/uart_driver.c
Normal file
92
labW5barnestr/Src/uart_driver.c
Normal file
@@ -0,0 +1,92 @@
|
||||
/*
|
||||
* uart_driver.c
|
||||
*
|
||||
* Created on: Nov 8, 2016
|
||||
* Author: barnekow
|
||||
*/
|
||||
#include "uart_driver.h"
|
||||
#include <inttypes.h>
|
||||
#include <stdio.h>
|
||||
|
||||
|
||||
// These will override _read and _write in syscalls.c, which are
|
||||
// prototyped as weak
|
||||
int _read(int file, char *ptr, int len)
|
||||
{
|
||||
int DataIdx;
|
||||
// Modified the for loop in order to get the correct behavior for fgets
|
||||
int byteCnt = 0;
|
||||
for (DataIdx = 0; DataIdx < len; DataIdx++)
|
||||
{
|
||||
//*ptr++ = __io_getchar();
|
||||
byteCnt++;
|
||||
//*ptr++ = usart2_getch();
|
||||
*ptr = usart2_getch();
|
||||
if(*ptr == '\n') break;
|
||||
ptr++;
|
||||
}
|
||||
|
||||
//return len;
|
||||
return byteCnt; // Return byte count
|
||||
}
|
||||
|
||||
int _write(int file, char *ptr, int len)
|
||||
{
|
||||
int DataIdx;
|
||||
|
||||
for (DataIdx = 0; DataIdx < len; DataIdx++)
|
||||
{
|
||||
usart2_putch(*ptr++);
|
||||
}
|
||||
return len;
|
||||
}
|
||||
|
||||
|
||||
|
||||
char usart2_getch(){
|
||||
char c;
|
||||
while((*(USART_SR)&(1<<RXNE)) != (1<<RXNE));
|
||||
c = ((char) *USART_DR); // Read character from usart
|
||||
usart2_putch(c); // Echo back
|
||||
|
||||
if (c == '\r'){ // If character is CR
|
||||
usart2_putch('\n'); // send it
|
||||
c = '\n'; // Return LF. fgets is terminated by LF
|
||||
}
|
||||
|
||||
return c;
|
||||
}
|
||||
|
||||
void usart2_putch(char c){
|
||||
while((*(USART_SR)&(1<<TXE)) != (1<<TXE));
|
||||
*(USART_DR) = c;
|
||||
}
|
||||
|
||||
void init_usart2(uint32_t baud, uint32_t sysclk){
|
||||
// Enable clocks for GPIOA and USART2
|
||||
*(RCC_AHB1ENR) |= (1<<GPIOAEN);
|
||||
*(RCC_APB1ENR) |= (1<<USART2EN);
|
||||
|
||||
// Function 7 of PORTA pins is USART
|
||||
*(GPIOA_AFRL) &= (0xFFFF00FF); // Clear the bits associated with PA3 and PA2
|
||||
*(GPIOA_AFRL) |= (0b01110111<<8); // Choose function 7 for both PA3 and PA2
|
||||
*(GPIOA_MODER) &= (0xFFFFFF0F); // Clear mode bits for PA3 and PA2
|
||||
*(GPIOA_MODER) |= (0b1010<<4); // Both PA3 and PA2 in alt function mode
|
||||
|
||||
// Set up USART2
|
||||
//USART2_init(); //8n1 no flow control
|
||||
// over8 = 0..oversample by 16
|
||||
// M = 0..1 start bit, data size is 8, 1 stop bit
|
||||
// PCE= 0..Parity check not enabled
|
||||
// no interrupts... using polling
|
||||
*(USART_CR1) = (1<<UE)|(1<<TE)|(1<<RE); // Enable UART, Tx and Rx
|
||||
*(USART_CR2) = 0; // This is the default, but do it anyway
|
||||
*(USART_CR3) = 0; // This is the default, but do it anyway
|
||||
*(USART_BRR) = sysclk/baud;
|
||||
|
||||
/* I'm not sure if this is needed for standard IO*/
|
||||
//setvbuf(stderr, NULL, _IONBF, 0);
|
||||
//setvbuf(stdin, NULL, _IONBF, 0);
|
||||
setvbuf(stdout, NULL, _IONBF, 0);
|
||||
}
|
||||
|
||||
Reference in New Issue
Block a user