Diff: main.cpp

Revision:

0:789510d98ade

Child:

1:a611582bffa7

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Wed Mar 08 16:59:48 2017 +0000
@@ -0,0 +1,85 @@
+/*
+ * 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 "Encoder.h"
+
+TIM_Encoder_InitTypeDef encoder2; // encoder3, encoder4;
+TIM_HandleTypeDef timer2; //  timer3,  timer4;
+
+int main()
+{
+    //examples
+    
+    //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);
+
+    //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) {
+        //uint16_t count1=0, count3=0, count4=0;
+        uint32_t count2=0;
+        int8_t dir2; // dir3, dir4;
+
+        
+        //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);
+
+        //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);
+
+        //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);
+
+        //TICKER 401 411 446 N/A 030
+//        count5=__HAL_TIM_GET_COUNTER(&timer5);
+//        dir5 = __HAL_TIM_IS_TIM_COUNTING_DOWN(&timer5);
+        
+        printf("%d%s\r\n", count2, dir2==0 ? "+":"-" );
+        wait(0.5);
+    }
+}