Dimitar Marinov
4 Rotary encoders with 5110 LCD display. For Nucleo boards
Diff: main.cpp
- Revision:
- 7:62c2c1382d86
- Parent:
- 6:920bfbc7a7a1
- Child:
- 8:67732769ecdd
--- a/main.cpp Sat Oct 22 19:56:47 2016 +0000
+++ b/main.cpp Sun Oct 23 15:48:58 2016 +0000
@@ -1,6 +1,36 @@
+/*
+ * Using STM32's counter peripherals to interface rotary encoders.
+ * Encoders are supported on F4xx's TIM1,2,3,4,5. TIM2 & TIM5 have 32bit count, others 16bit.
+ * Beware mbed uses TIM5 for system timer, SPI needs TIM1, others used for PWM.
+ * Check your platform's PeripheralPins.c & PeripheralNames.h if you need both PWM & encoders.
+ *
+ * Edit HAL_TIM_Encoder_MspInitFx.cpp to suit your mcu & board's available pinouts & pullups/downs.
+ *
+ * Thanks to:
+ * http://petoknm.wordpress.com/2015/01/05/rotary-encoder-and-stm32/
+ *
+ * References:
+ * http://www.st.com/st-web-ui/static/active/en/resource/technical/document/user_manual/DM00122015.pdf
+ * http://www.st.com/st-web-ui/static/active/en/resource/technical/document/reference_manual/DM00096844.pdf
+ * http://www.st.com/web/en/resource/technical/document/application_note/DM00042534.pdf
+ * http://www.st.com/web/en/resource/technical/document/datasheet/DM00102166.pdf
+ *
+ * David Lowe Jan 2015
+ */
+
+
#include "mbed.h"
#include "N5110.h"
-#include "REnc.h"
+#include "Encoder.h"
+
+//STM mbed bug: these macros are MISSING from stm32f3xx_hal_tim.h
+#ifdef TARGET_STM32F3
+#define __HAL_TIM_GET_COUNTER(__HANDLE__) ((__HANDLE__)->Instance->CNT)
+#define __HAL_TIM_IS_TIM_COUNTING_DOWN(__HANDLE__) (((__HANDLE__)->Instance->CR1 &(TIM_CR1_DIR)) == (TIM_CR1_DIR))
+#endif
+
+TIM_Encoder_InitTypeDef encoder1, encoder2, encoder3, encoder4;
+TIM_HandleTypeDef timer1, timer2, timer3, timer4;
//DigitalOut red(LED1);
@@ -10,25 +40,34 @@
// VCC,SCE, RST, D/C, MOSI,SCLK,LED
N5110 lcd(PB_8,PA_4,PA_0,PA_1,PA_7,PA_5,PB_9); //PA_4 and PA_6 not used
-REnc encoder(PC_3, PC_2);
+
int temperature = 50;
-void CCW_Handle(void)
-{
- temperature--;
-}
+int main() {
+ uint16_t count1=0, count3=0, count4=0;
+ uint32_t count2=0;
+ int8_t dir1, dir2, dir3, dir4;
+
+ // first need to initialise display
+ lcd.init();
+ //examples
-void CW_Handle(void)
-{
- temperature++;
-}
-
+ //counting on A-input only, 2 ticks per cycle, rolls over at 100
+ EncoderInit(&encoder1, &timer1, TIM1, 99, TIM_ENCODERMODE_TI1);
+
+ //counting on both A&B inputs, 4 ticks per cycle, full 32-bit count
+ EncoderInit(&encoder2, &timer2, TIM2, 0xffffffff, TIM_ENCODERMODE_TI12);
-int main() {
- // first need to initialise display
- lcd.init();
- encoder.setHandleCCW(CCW_Handle);
- encoder.setHandleCC(CW_Handle);
+ //counting on B-input only, 2 ticks per cycle, full 16-bit count
+ EncoderInit(&encoder3, &timer3, TIM3, 0xffff, TIM_ENCODERMODE_TI2);
+
+ //counting on both A&B inputs, 4 ticks per cycle, full 16-bit count
+ EncoderInit(&encoder4, &timer4, TIM4, 0xffff, TIM_ENCODERMODE_TI12);
+
+ //TIM5 is used by mbed for systick
+ //EncoderInit(encoder2, timer2, TIM5, 0xffffffff, TIM_ENCODERMODE_TI12);
+
+ printf("STM HAL encoder demo\n\r");
// while(1) {
// for (i=1; i<7; i++) {
@@ -38,50 +77,85 @@
// wait(0.2);
// }
// }
- while(1) {
+ while(1)
+ {
+
+ //OK 401 411 446 TICKER 030
+ //count1=TIM1->CNT;
+ //dir1=TIM1->CR1&TIM_CR1_DIR;
+ count1=__HAL_TIM_GET_COUNTER(&timer1);
+ dir1 = __HAL_TIM_IS_TIM_COUNTING_DOWN(&timer1);
- // these are default settings so not strictly needed
- lcd.normalMode(); // normal colour mode
- lcd.setBrightness(0.5); // put LED backlight on 50%
-
- // can directly print strings at specified co-ordinates
- lcd.printString("Hello, World!",0,0);
+ //OK 401 411 446 NOK 030
+ //count2=TIM2->CNT;
+ //dir2=TIM2->CR1&TIM_CR1_DIR;
+ count2=__HAL_TIM_GET_COUNTER(&timer2);
+ dir2 = __HAL_TIM_IS_TIM_COUNTING_DOWN(&timer2);
- char buffer[14]; // each character is 6 pixels wide, screen is 84 pixels (84/6 = 14)
- // so can display a string of a maximum 14 characters in length
- // or create formatted strings - ensure they aren't more than 14 characters long
- // int temperature = encoder.getVal();
- int length = sprintf(buffer,"T = %2d C",temperature); // print formatted data to buffer
- // it is important the format specifier ensures the length will fit in the buffer
- if (length <= 14) // if string will fit on display
- lcd.printString(buffer,0,1); // display on screen
+ //OK 401 411 446 030
+ //count3=TIM3->CNT;
+ //dir3=TIM3->CR1&TIM_CR1_DIR;
+ count3=__HAL_TIM_GET_COUNTER(&timer3);
+ dir3 = __HAL_TIM_IS_TIM_COUNTING_DOWN(&timer3);
+
+ //OK 401 411 446 N/A 030
+ //count4=TIM4->CNT;
+ //dir4=TIM4->CR1&TIM_CR1_DIR;
+ count4=__HAL_TIM_GET_COUNTER(&timer4);
+ dir4 = __HAL_TIM_IS_TIM_COUNTING_DOWN(&timer4);
- float pressure = 1012.3; // same idea with floats
- length = sprintf(buffer,"P = %.2f mb",pressure);
- if (length <= 14)
- lcd.printString(buffer,0,2);
+ //TICKER 401 411 446 N/A 030
+// count5=__HAL_TIM_GET_COUNTER(&timer5);
+// dir5 = __HAL_TIM_IS_TIM_COUNTING_DOWN(&timer5);
+// printf("%d%s %d%s %d%s %d%s\r\n", count1, dir1==0 ? "+":"-",
+// count2, dir2==0 ? "+":"-",
+// count3, dir3==0 ? "+":"-",
+// count4, dir4==0 ? "+":"-" );
+
+ // these are default settings so not strictly needed
+ lcd.normalMode(); // normal colour mode
+ lcd.setBrightness(0.5); // put LED backlight on 50%
- // can also print individual characters at specified place
- lcd.printChar('X',5,3);
+ // can directly print strings at specified co-ordinates
+ lcd.printString("Hello, World!",0,0);
- // draw a line across the display at y = 40 pixels (origin top-left)
- for (int i = 0; i < WIDTH; i++) {
- lcd.setPixel(i,40);
- }
- // need to refresh display after setting pixels
- lcd.refresh();
+ char buffer[14]; // each character is 6 pixels wide, screen is 84 pixels (84/6 = 14)
+ // so can display a string of a maximum 14 characters in length
+ // or create formatted strings - ensure they aren't more than 14 characters long
+ // int temperature = encoder.getVal();
+ int length = sprintf(buffer,"T = %2d C",temperature); // print formatted data to buffer
+ // it is important the format specifier ensures the length will fit in the buffer
+ if (length <= 14) // if string will fit on display
+ {
+ lcd.printString(buffer,0,1); // display on screen
+ }
+ float pressure = 1012.3; // same idea with floats
+ length = sprintf(buffer,"P = %.2f mb",pressure);
+ if (length <= 14)
+ {
+ lcd.printString(buffer,0,2);
+ }
+ // can also print individual characters at specified place
+ lcd.printChar('X',5,3);
- // can also check status of pixels using getPixel(x,y)
- while(1)
- {
- wait(.5);
-
- length = sprintf(buffer,"T = %2d C",temperature); // print formatted data to buffer
-
- if (length <= 14) // if string will fit on display
- lcd.printString(buffer,0,1); // display on screen
- }
- lcd.clear();
+ // draw a line across the display at y = 40 pixels (origin top-left)
+ for (int i = 0; i < WIDTH; i++)
+ {
+ lcd.setPixel(i,40);
+ }
+ // need to refresh display after setting pixels
+ lcd.refresh();
- }
+ // can also check status of pixels using getPixel(x,y)
+ while(1)
+ {
+ wait(.5);
+ length = sprintf(buffer,"T = %2d C",temperature); // print formatted data to buffer
+ if (length <= 14) // if string will fit on display
+ {
+ lcd.printString(buffer,0,1); // display on screen
+ }
+ }
+ lcd.clear();
+ }
}