Dimitar Marinov / Mbed 2 deprecated Nucleo_4_encoders_w_Nokia5110

4 Rotary encoders with 5110 LCD display. For Nucleo boards

Dependencies:   N5110 mbed

main.cpp@4:cd50b7dfaf27, 2016-09-21 (annotated)

Committer:
triochi
Date:
Wed Sep 21 14:37:29 2016 +0000
Revision:
4:cd50b7dfaf27
Parent:
3:bf5e17e09fe3
Child:
5:0daf19d95cc7
Add some timer functions with TIM1

Who changed what in which revision?

UserRevisionLine numberNew contents of line
triochi 0:b7e471386653 1 #include "mbed.h"
triochi 0:b7e471386653 2 #include "N5110.h"
triochi 1:d7d729404013 3 #include "REnc.h"
triochi 3:bf5e17e09fe3 4 //https://developer.mbed.org/users/mbed_official/code/mbed-src/file/c9b73cd93427/targets/hal/TARGET_STM/TARGET_STM32F4/TARGET_NUCLEO_F411RE/PeripheralPins.c
triochi 0:b7e471386653 5
triochi 0:b7e471386653 6 //DigitalOut red(LED1);
triochi 0:b7e471386653 7 //DigitalOut blue(LED2);
triochi 0:b7e471386653 8 //DigitalOut green(LED3);
triochi 3:bf5e17e09fe3 9
triochi 0:b7e471386653 10 int i;
triochi 0:b7e471386653 11
triochi 0:b7e471386653 12 // VCC,SCE, RST, D/C, MOSI,SCLK,LED
triochi 0:b7e471386653 13 N5110 lcd(PB_8,PA_4,PA_0,PA_1,PA_7,PA_5,PB_9); //PA_4 and PA_6 not used
triochi 1:d7d729404013 14 REnc encoder(PC_3, PC_2);
triochi 3:bf5e17e09fe3 15 //PwmOut led(PA_3);
triochi 4:cd50b7dfaf27 16 //PwmOut green(LED1);
triochi 1:d7d729404013 17 int temperature = 50;
triochi 4:cd50b7dfaf27 18 TIM_HandleTypeDef tim_init;
triochi 4:cd50b7dfaf27 19
triochi 4:cd50b7dfaf27 20 // Function declarations
triochi 4:cd50b7dfaf27 21 void enable_tim(void);
triochi 1:d7d729404013 22
triochi 1:d7d729404013 23 void CCW_Handle(void)
triochi 1:d7d729404013 24 {
triochi 1:d7d729404013 25 temperature--;
triochi 1:d7d729404013 26 }
triochi 1:d7d729404013 27
triochi 1:d7d729404013 28 void CW_Handle(void)
triochi 1:d7d729404013 29 {
triochi 1:d7d729404013 30 temperature++;
triochi 1:d7d729404013 31 }
triochi 1:d7d729404013 32
triochi 0:b7e471386653 33
triochi 0:b7e471386653 34 int main() {
triochi 0:b7e471386653 35 // first need to initialise display
triochi 0:b7e471386653 36 lcd.init();
triochi 1:d7d729404013 37 encoder.setHandleCCW(CCW_Handle);
triochi 2:7d10aa2795c5 38 encoder.setHandleCC(CW_Handle);
triochi 4:cd50b7dfaf27 39
triochi 4:cd50b7dfaf27 40 HAL_TIM_Base_MspInit(&tim_init); // initialize the TIM basic
triochi 4:cd50b7dfaf27 41 enable_tim();
triochi 4:cd50b7dfaf27 42
triochi 3:bf5e17e09fe3 43 // led.period_us(100);
triochi 3:bf5e17e09fe3 44 // led = 20;
triochi 4:cd50b7dfaf27 45 // green = 0.5;
triochi 4:cd50b7dfaf27 46 // green.period_us(10000);
triochi 4:cd50b7dfaf27 47 // while(1) {
triochi 4:cd50b7dfaf27 48 // green = green + 0.01;
triochi 4:cd50b7dfaf27 49 // wait(0.2);
triochi 4:cd50b7dfaf27 50 // if(green == 1.0) {
triochi 4:cd50b7dfaf27 51 // green = 0;
triochi 4:cd50b7dfaf27 52 // }
triochi 4:cd50b7dfaf27 53 // }
triochi 0:b7e471386653 54
triochi 0:b7e471386653 55 // while(1) {
triochi 0:b7e471386653 56 // for (i=1; i<7; i++) {
triochi 0:b7e471386653 57 // red = i & 1;
triochi 0:b7e471386653 58 // blue = i & 2;
triochi 0:b7e471386653 59 // green = i & 4;
triochi 0:b7e471386653 60 // wait(0.2);
triochi 0:b7e471386653 61 // }
triochi 0:b7e471386653 62 // }
triochi 0:b7e471386653 63 while(1) {
triochi 4:cd50b7dfaf27 64
triochi 4:cd50b7dfaf27 65 HAL_TIM_Base_Start(&tim_init); // starts the timer
triochi 0:b7e471386653 66
triochi 0:b7e471386653 67 // these are default settings so not strictly needed
triochi 0:b7e471386653 68 lcd.normalMode(); // normal colour mode
triochi 0:b7e471386653 69 lcd.setBrightness(0.5); // put LED backlight on 50%
triochi 0:b7e471386653 70
triochi 0:b7e471386653 71 // can directly print strings at specified co-ordinates
triochi 0:b7e471386653 72 lcd.printString("Hello, World!",0,0);
triochi 0:b7e471386653 73
triochi 0:b7e471386653 74 char buffer[14]; // each character is 6 pixels wide, screen is 84 pixels (84/6 = 14)
triochi 0:b7e471386653 75 // so can display a string of a maximum 14 characters in length
triochi 0:b7e471386653 76 // or create formatted strings - ensure they aren't more than 14 characters long
triochi 1:d7d729404013 77 // int temperature = encoder.getVal();
triochi 0:b7e471386653 78 int length = sprintf(buffer,"T = %2d C",temperature); // print formatted data to buffer
triochi 0:b7e471386653 79 // it is important the format specifier ensures the length will fit in the buffer
triochi 0:b7e471386653 80 if (length <= 14) // if string will fit on display
triochi 0:b7e471386653 81 lcd.printString(buffer,0,1); // display on screen
triochi 0:b7e471386653 82
triochi 0:b7e471386653 83 float pressure = 1012.3; // same idea with floats
triochi 0:b7e471386653 84 length = sprintf(buffer,"P = %.2f mb",pressure);
triochi 0:b7e471386653 85 if (length <= 14)
triochi 0:b7e471386653 86 lcd.printString(buffer,0,2);
triochi 0:b7e471386653 87
triochi 0:b7e471386653 88 // can also print individual characters at specified place
triochi 0:b7e471386653 89 lcd.printChar('X',5,3);
triochi 0:b7e471386653 90
triochi 0:b7e471386653 91 // draw a line across the display at y = 40 pixels (origin top-left)
triochi 0:b7e471386653 92 for (int i = 0; i < WIDTH; i++) {
triochi 0:b7e471386653 93 lcd.setPixel(i,40);
triochi 0:b7e471386653 94 }
triochi 0:b7e471386653 95 // need to refresh display after setting pixels
triochi 0:b7e471386653 96 lcd.refresh();
triochi 0:b7e471386653 97
triochi 0:b7e471386653 98 // can also check status of pixels using getPixel(x,y)
triochi 1:d7d729404013 99 while(1)
triochi 1:d7d729404013 100 {
triochi 1:d7d729404013 101 wait(.5);
triochi 1:d7d729404013 102
triochi 1:d7d729404013 103 length = sprintf(buffer,"T = %2d C",temperature); // print formatted data to buffer
triochi 1:d7d729404013 104
triochi 1:d7d729404013 105 if (length <= 14) // if string will fit on display
triochi 1:d7d729404013 106 lcd.printString(buffer,0,1); // display on screen
triochi 1:d7d729404013 107 }
triochi 0:b7e471386653 108 lcd.clear();
triochi 0:b7e471386653 109
triochi 0:b7e471386653 110 }
triochi 0:b7e471386653 111 }
triochi 4:cd50b7dfaf27 112
triochi 4:cd50b7dfaf27 113 void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim) {
triochi 4:cd50b7dfaf27 114 if(htim->Instance == TIM1){
triochi 4:cd50b7dfaf27 115 // if(curr_sec == usec){
triochi 4:cd50b7dfaf27 116 // HAL_TIM_Base_Stop(&tim_init); // stop the timer it has been 15 useconds
triochi 4:cd50b7dfaf27 117 // // print the level of the signal to the console
triochi 4:cd50b7dfaf27 118 // curr_sec = 0;
triochi 4:cd50b7dfaf27 119 // }
triochi 4:cd50b7dfaf27 120 // else
triochi 4:cd50b7dfaf27 121 // curr_sec++;
triochi 4:cd50b7dfaf27 122 }
triochi 4:cd50b7dfaf27 123 }
triochi 4:cd50b7dfaf27 124
triochi 4:cd50b7dfaf27 125 /*
triochi 4:cd50b7dfaf27 126 * Configures the timer to pin PA3.
triochi 4:cd50b7dfaf27 127 */
triochi 4:cd50b7dfaf27 128 void enable_tim(void){
triochi 4:cd50b7dfaf27 129 tim_init.Instance = TIM1;
triochi 4:cd50b7dfaf27 130 tim_init.Init.CounterMode = TIM_COUNTERMODE_UP;
triochi 4:cd50b7dfaf27 131 tim_init.Init.Prescaler = 16 - 1; // 1,000,000 Hz -> 1/1,000,000 seconds
triochi 4:cd50b7dfaf27 132 tim_init.Init.Period = 0;
triochi 4:cd50b7dfaf27 133 tim_init.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1; // for now...
triochi 4:cd50b7dfaf27 134 //tim_init.Init.RepetitionCounter = 0;
triochi 4:cd50b7dfaf27 135 __TIM1_CLK_ENABLE(); // pin PA8 - PA10
triochi 4:cd50b7dfaf27 136 // configure the GPIO PA3
triochi 4:cd50b7dfaf27 137 __GPIOA_CLK_ENABLE();
triochi 4:cd50b7dfaf27 138 GPIO_InitTypeDef GPIO_InitStruct;
triochi 4:cd50b7dfaf27 139 GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
triochi 4:cd50b7dfaf27 140 GPIO_InitStruct.Pin = GPIO_PIN_8; // TIM1_CH1
triochi 4:cd50b7dfaf27 141 GPIO_InitStruct.Pull = GPIO_NOPULL;
triochi 4:cd50b7dfaf27 142 GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
triochi 4:cd50b7dfaf27 143 GPIO_InitStruct.Alternate = GPIO_AF1_TIM1;
triochi 4:cd50b7dfaf27 144 HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
triochi 4:cd50b7dfaf27 145 GPIO_InitStruct.Pin = GPIO_PIN_9; // TIM1_CH2
triochi 4:cd50b7dfaf27 146 HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
triochi 4:cd50b7dfaf27 147 GPIO_InitStruct.Pin = GPIO_PIN_10; // TIM1_CH3
triochi 4:cd50b7dfaf27 148 HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
triochi 4:cd50b7dfaf27 149
triochi 4:cd50b7dfaf27 150 GPIO_InitStruct.Pin = GPIO_PIN_13; // TIM1_CH1N
triochi 4:cd50b7dfaf27 151 HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
triochi 4:cd50b7dfaf27 152 GPIO_InitStruct.Pin = GPIO_PIN_14; // TIM1_CH2N
triochi 4:cd50b7dfaf27 153 HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
triochi 4:cd50b7dfaf27 154 GPIO_InitStruct.Pin = GPIO_PIN_15; // TIM1_CH3N
triochi 4:cd50b7dfaf27 155 HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
triochi 4:cd50b7dfaf27 156
triochi 4:cd50b7dfaf27 157 HAL_NVIC_SetPriority(TIM1_UP_TIM10_IRQn, 0, 0); //Enable the peripheral IRQ
triochi 4:cd50b7dfaf27 158 HAL_NVIC_EnableIRQ(TIM1_UP_TIM10_IRQn);
triochi 4:cd50b7dfaf27 159 HAL_TIM_Base_Init(&tim_init);
triochi 4:cd50b7dfaf27 160 //HAL_TIM_Base_Start_IT(&tim_init); //Start the timer
triochi 4:cd50b7dfaf27 161 }
triochi 4:cd50b7dfaf27 162
triochi 4:cd50b7dfaf27 163 void TIM1_IRQHandler(void) {
triochi 4:cd50b7dfaf27 164 HAL_TIM_IRQHandler(&tim_init);
triochi 4:cd50b7dfaf27 165 }