Diff: main.cpp

Revision:

1:5bb7cf57b763

Parent:

0:8a21ee76eb7d

--- a/main.cpp	Sun Mar 07 11:42:55 2021 +0000
+++ b/main.cpp	Sun Mar 07 11:59:28 2021 +0000
@@ -1,16 +1,228 @@
+/*
+ * mbed Application program / Frequency Counter
+ *
+ * Copyright (c) 2014,'15,'20 Kenji Arai / JH1PJL
+ *  http://www7b.biglobe.ne.jp/~kenjia/
+ *  https://os.mbed.com/users/kenjiArai/
+ *      Created: October   18th, 2014
+ *      Revised: August     4th, 2020
+ */
+
+//#define USE_TEXT_LCD    // use Text LCD/I2C Interface
+
 #include "mbed.h"
+#include "freq_counter.h"
+
+#define GATE_TIME_10SEC     10000000
+#define GATE_TIME_1SEC      1000000
+#define GATE_TIME_100MS     100000
+#define GATE_TIME_10MS      10000
+
+#define GATE_TIME   GATE_TIME_1SEC
+
+//extern void print_revision(void);
+
+// LPC1768 ---------------------------------------------------------------------
+//#if defined(TARGET_LPC1768)
 
-DigitalOut myled(p5);
+// LPC1768 Frequency example
+// Ref Clock output -> "PWM6" pin to 96MHZ/19 = 5.052MHz (Approx)
+#   define CLK_REFRENCE()  PWM6_SETCLK(19)
+// Outout mbed's "PWM6" pin to 96MHZ/96 = 1.000MHz (Approx)
+//#define CLK_REFRENCE()    PWM6_SETCLK(96)
+
+//DigitalOut led_gate(LED1);
+//I2C i2cBus(p9, p10);    // SDA, SCL
+PwmOut fmclck(p21);     // for RESERVE pin21 as PWM1[6]
+F_COUNTER fc(p30);
+
+void PWM6_SETCLK(int div);
+
+/**
+// LPC1114 ---------------------------------------------------------------------
+#elif defined(TARGET_LPC1114)
+
+// LPC1114 Frequency example
+// Ref Clock output -> "dp24" pin as CLOCKOUT
+
+DigitalOut led_gate(LED2);
+I2C i2cBus(dp5,dp27);   // SDA, SCL
+F_COUNTER fc(dp14);
+
+void clock_out(void);
+#   define CLK_REFRENCE()  clock_out()
+#   warning "Don't forget LPC1114 runs with internal clock."
+#   warning "Measurement data is not accurate!!"
 
-int main() {
-    int i =1;
-    printf("Hello World ! \n");
-    
-    while(1) {
-        myled = 1;
-        wait(2.2);
-        myled = 0;
-        wait(2.2);
-        
+// STM32 / Nucleo --------------------------------------------------------------
+#elif defined(TARGET_NUCLEO_F401RE)\
+    || defined(TARGET_NUCLEO_F411RE)\
+    || defined(TARGET_NUCLEO_F446RE)
+
+// STM32 Frequency example
+// Ref Clock output -> "PC_9" pin as MCO2 System clock / 4
+
+DigitalOut led_gate(LED1);
+I2C i2cBus(PB_9,PB_8);  // SDA, SCL
+F_COUNTER fc(PA_0);
+
+void port_mco2_set(void);
+#   define CLK_REFRENCE()  port_mco2_set()
+
+// Other CPU's -----------------------------------------------------------------
+#else
+#   error "No support for your CPU"
+#endif
+
+//  Only for LCD control -------------------------------------------------------
+#if defined(USE_TEXT_LCD)
+#include "TextLCD.h"    // Std. lib./ LCD control
+// LCD(Akizuki AQM0802A)
+TextLCD_I2C_N lcd(&i2cBus, 0x7c, TextLCD::LCD8x2);
+void lcd_onotialize(void);
+void display_on_lcd(float freqency, uint32_t t_gate);
+#   define LCD_INITIALIZE()     lcd_onotialize()
+#   define DISPLAY_ON_LCD(x,y)  display_on_lcd(x,y)
+#else
+#   define LCD_INITIALIZE()     {;}
+#   define DISPLAY_ON_LCD(x,y)  {;}
+#endif
+**/
+//------------------------------------------------------------------------------
+//  Control Program
+//------------------------------------------------------------------------------
+int main()
+{
+    float freqency;
+    uint32_t t_gate;
+
+//    print_revision();
+    printf("\r\nFrequency Counter by JH1PJL created on " __DATE__ "\r\n");
+    // lcd
+//    LCD_INITIALIZE();
+    // Set Internalclock for reference
+    CLK_REFRENCE();
+    while(true) {
+//        led_gate = 1;
+        t_gate = GATE_TIME;
+        freqency = (float)fc.read_frequency(t_gate);
+//        led_gate = 0;
+//        printf("f= %9.0f [Hz], gate= %4.3f [Sec]\r\n", freqency, (float)t_gate / 1e6);
+        printf("f= %9.0f [Hz], wind_speed= %f\n", freqency, (0.062 *freqency) + 0.578);
+//        DISPLAY_ON_LCD(freqency, t_gate);
     }
 }
+
+#if defined(TARGET_LPC1768)
+
+// Clock Output From pin21(PWM6)
+// Set Clock Freq with div.
+// if mbed is running at 96MHz, div is set 96 to Get 1MHz.
+void PWM6_SETCLK(int div)
+{
+    // 1)Reset counter, disable PWM
+    LPC_PWM1->TCR = (1 << 1);
+    LPC_SC->PCLKSEL0 &= ~(0x3 << 12);
+    // 2)Set peripheral clock divider to /1, i.e. system clock
+    LPC_SC->PCLKSEL0 |= (1 << 12);
+    // 3)Match Register 0 is shared period counter for all PWM1
+    LPC_PWM1->MR0 = div - 1;
+    LPC_PWM1->MR6 = (div + 1)>> 1;
+    // 4)Start updating at next period start
+    LPC_PWM1->LER |= 1;
+    // 5)Enable counter and PWM
+    LPC_PWM1->TCR = (1 << 0) + (1 << 3);
+    printf("Set pin21(PWM6) for clock output\r\n");
+}
+
+#elif defined(TARGET_LPC1114)
+
+// CLOCKOUT from pin24(dp18)
+//      Freq = 48MHz/4 = 12MHz
+void clock_out(void)
+{
+    LPC_SYSCON->CLKOUTCLKSEL = 3;       // System clock
+    LPC_SYSCON->CLKOUTDIV = 4;          // div 1/4
+    LPC_IOCON->PIO0_1 = 1;              // select CLKOUT to P0_1(pin24)/dp18
+    LPC_SYSCON->CLKOUTUEN = 1;          // enable output
+    printf("Set P0_1(pin24)/dp18 for clock output\r\n");
+}
+
+#elif defined(TARGET_NUCLEO_F401RE)\
+    || defined(TARGET_NUCLEO_F411RE)\
+    || defined(TARGET_NUCLEO_F446RE)
+
+void port_mco2_set(void)
+{
+    // PC9 -> MCO_2
+    DigitalOut dumy1(PC_9);
+    uint32_t temp =
+        ((uint32_t)(GPIO_AF0_MCO) << (((uint32_t)9 & (uint32_t)0x07) * 4)) ;
+    GPIOC->AFR[9 >> 3] &=
+        ~((uint32_t)0xf << ((uint32_t)(9 & (uint32_t)0x07) * 4)) ;
+    GPIOC->AFR[9 >> 3] |= temp;
+    GPIOC->MODER &= ~(GPIO_MODER_MODER0 << (9 * 2));
+    GPIOC->MODER |= (0x2 << (9 * 2));
+    GPIOC->OSPEEDR |= (0x03 << (9 * 2)); // High speed
+    // Select output clock source
+    RCC->CFGR &= 0x009fffff;
+    // MCO_2 output SYSCLK 1/4
+    //             MCO2          MCO2PRE
+    RCC->CFGR |= (0x0 << 30) + (0x6 << 27);
+    printf("Set PC9 for clock output\r\n");
+}
+
+#else
+#   error "No support for your CPU"
+#endif
+
+
+/**
+#if defined(USE_TEXT_LCD)
+void lcd_onotialize(void)
+{
+    // Initialize LCD
+    lcd.locate(0, 0);    // 1st line top
+    //          12345678
+    lcd.printf("Fre-Cntr");
+    lcd.locate(0, 1);    // 2nd line top
+    //        12345678
+    lcd.puts(" JH1PJL ");
+    lcd.setCursor(TextLCD::CurOff_BlkOff);
+    lcd.setContrast(0x16);
+    thread_sleep_for(5000);
+    lcd.locate(0, 1);    // 2nd line top
+    //        12345678
+    lcd.puts("        ");
+}
+
+void display_on_lcd(float freqency, uint32_t t_gate)
+{
+    lcd.locate(0, 0);    // 1st line top
+    lcd.printf("%8.0f", freqency);
+    lcd.locate(0, 1);    // 2nd line top
+    switch (t_gate) {
+        case GATE_TIME_10SEC:
+            //          12345678
+            lcd.printf("Hz  x0.1");
+            break;
+        case GATE_TIME_1SEC:
+            //          12345678
+            lcd.printf("Hz    x1");
+            break;
+        case GATE_TIME_100MS:
+            //          12345678
+            lcd.printf("Hz   x10");
+            break;
+        case GATE_TIME_10MS:
+            //          12345678
+            lcd.printf("Hz  x100");
+            break;
+        default:
+            //          12345678
+            lcd.printf("Hz gate?");
+            break;
+    }
+}
+#endif
+**/
\ No newline at end of file