Kenji Arai / Mbed OS Frequency_Counter

Only for mbed LPC1768, mbed LPC1114FN28, Nucleo-F401 and Nucleo-F411. No way to change pin assign.

Dependencies:   freq_counter TextLCD

Fork of 5MHzOSC by fuyuno sakura

Please refer following page.
http://developer.mbed.org/users/kenjiArai/notebook/simple-frequency-counter/
/users/kenjiArai/notebook/frequency-counters/

main.cpp@5:af9fa3d0731c, 2014-10-19 (annotated)

Committer:
kenjiArai
Date:
Sun Oct 19 06:45:13 2014 +0000
Revision:
5:af9fa3d0731c
Parent:
4:e7d16ef216d4
Child:
6:44c2bcbdd77b
Frequency Counter program based on mio/5MHzOSC program

Who changed what in which revision?

UserRevisionLine numberNew contents of line
kenjiArai 5:af9fa3d0731c 1 /*
kenjiArai 5:af9fa3d0731c 2 * mbed Application program / Frequency Counter
kenjiArai 5:af9fa3d0731c 3 *
kenjiArai 5:af9fa3d0731c 4 * Copyright (c) 2014 Kenji Arai / JH1PJL
kenjiArai 5:af9fa3d0731c 5 * http://www.page.sannet.ne.jp/kenjia/index.html
kenjiArai 5:af9fa3d0731c 6 * http://mbed.org/users/kenjiArai/
kenjiArai 5:af9fa3d0731c 7 * Created: October 18th, 2014
kenjiArai 5:af9fa3d0731c 8 * Revised: October 19th, 2014
kenjiArai 5:af9fa3d0731c 9 *
kenjiArai 5:af9fa3d0731c 10 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
kenjiArai 5:af9fa3d0731c 11 * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE
kenjiArai 5:af9fa3d0731c 12 * AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
kenjiArai 5:af9fa3d0731c 13 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
kenjiArai 5:af9fa3d0731c 14 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
kenjiArai 5:af9fa3d0731c 15 */
mio 0:c988614df67a 16
kenjiArai 5:af9fa3d0731c 17 // Include ---------------------------------------------------------------------------------------
mio 0:c988614df67a 18 #include "mbed.h"
kenjiArai 5:af9fa3d0731c 19 #include "TextLCD.h" // Std. lib./ LCD control
kenjiArai 5:af9fa3d0731c 20 #include "freq_counter.h"
mio 0:c988614df67a 21
kenjiArai 5:af9fa3d0731c 22 // Definition ------------------------------------------------------------------------------------
kenjiArai 5:af9fa3d0731c 23 #define USE_COM // use Communication with PC(UART)
mio 1:2a347c40b1da 24
kenjiArai 5:af9fa3d0731c 25 #ifdef USE_COM
kenjiArai 5:af9fa3d0731c 26 #define BAUD(x) pc.baud(x)
kenjiArai 5:af9fa3d0731c 27 #define GETC(x) pc.getc(x)
kenjiArai 5:af9fa3d0731c 28 #define PUTC(x) pc.putc(x)
kenjiArai 5:af9fa3d0731c 29 #define PRINTF(...) pc.printf(__VA_ARGS__)
kenjiArai 5:af9fa3d0731c 30 #define READABLE(x) pc.readable(x)
kenjiArai 5:af9fa3d0731c 31 #else
kenjiArai 5:af9fa3d0731c 32 #define BAUD(x) {;}
kenjiArai 5:af9fa3d0731c 33 #define GETC(x) {;}
kenjiArai 5:af9fa3d0731c 34 #define PUTC(x) {;}
kenjiArai 5:af9fa3d0731c 35 #define PRINTF(...) {;}
kenjiArai 5:af9fa3d0731c 36 #define READABLE(x) {;}
kenjiArai 5:af9fa3d0731c 37 #endif
mio 1:2a347c40b1da 38
kenjiArai 5:af9fa3d0731c 39 // LPC1768 Frequency example
kenjiArai 5:af9fa3d0731c 40 // Outout mbed's "PWM6" pin to 96MHZ/19 = 5.052MHz (Approx)
kenjiArai 5:af9fa3d0731c 41 #define PWM_EAMPLE() PWM6_SETCLK(19)
kenjiArai 5:af9fa3d0731c 42 // Outout mbed's "PWM6" pin to 96MHZ/96 = 1.000MHz (Approx)
kenjiArai 5:af9fa3d0731c 43 //#define PWM_EAMPLE() PWM6_SETCLK(96)
kenjiArai 5:af9fa3d0731c 44
kenjiArai 5:af9fa3d0731c 45 // Object ----------------------------------------------------------------------------------------
kenjiArai 5:af9fa3d0731c 46 DigitalOut led_gate(LED1);
kenjiArai 5:af9fa3d0731c 47 DigitalOut led_not_zero(LED2);
kenjiArai 5:af9fa3d0731c 48 DigitalOut led_01(LED3);
kenjiArai 5:af9fa3d0731c 49 DigitalOut led_10(LED4);
kenjiArai 5:af9fa3d0731c 50 DigitalIn sw_01(p19);
kenjiArai 5:af9fa3d0731c 51 DigitalIn sw_10(p20);
kenjiArai 5:af9fa3d0731c 52 Serial pc(USBTX, USBRX);
kenjiArai 5:af9fa3d0731c 53 I2C i2cBus(p9, p10); // SDA, SCL
kenjiArai 5:af9fa3d0731c 54 TextLCD_I2C_N lcd(&i2cBus, 0x7c, TextLCD::LCD8x2); // LCD(Akizuki AQM0802A)
kenjiArai 5:af9fa3d0731c 55 PwmOut fmclck(p21); // for RESERVE pin21 as PWM1[6]
kenjiArai 5:af9fa3d0731c 56 F_COUNTER fc(p30);
mio 0:c988614df67a 57
kenjiArai 5:af9fa3d0731c 58 // RAM -------------------------------------------------------------------------------------------
kenjiArai 5:af9fa3d0731c 59 float freqency;
kenjiArai 5:af9fa3d0731c 60 float t_gate;
kenjiArai 5:af9fa3d0731c 61 uint8_t sw;
kenjiArai 5:af9fa3d0731c 62
kenjiArai 5:af9fa3d0731c 63 // ROM / Constant data ---------------------------------------------------------------------------
mio 1:2a347c40b1da 64
kenjiArai 5:af9fa3d0731c 65 // Function prototypes ---------------------------------------------------------------------------
kenjiArai 5:af9fa3d0731c 66
kenjiArai 5:af9fa3d0731c 67 // Function prototypes ---------------------------------------------------------------------------
kenjiArai 5:af9fa3d0731c 68
kenjiArai 5:af9fa3d0731c 69 //-------------------------------------------------------------------------------------------------
kenjiArai 5:af9fa3d0731c 70 // Control Program
kenjiArai 5:af9fa3d0731c 71 //-------------------------------------------------------------------------------------------------
kenjiArai 5:af9fa3d0731c 72 #if defined(TARGET_LPC1768)
mio 1:2a347c40b1da 73 // Clock Output From pin21(PWM6)
mio 1:2a347c40b1da 74 // Set Clock Freq with div.
mio 1:2a347c40b1da 75 // if mbed is running at 96MHz, div is set 96 to Get 1MHz.
mio 1:2a347c40b1da 76 void PWM6_SETCLK(int div)
mio 1:2a347c40b1da 77 {
kenjiArai 5:af9fa3d0731c 78 LPC_PWM1->TCR = (1 << 1); // 1)Reset counter, disable PWM
kenjiArai 5:af9fa3d0731c 79 LPC_SC->PCLKSEL0 &= ~(0x3 << 12);
kenjiArai 5:af9fa3d0731c 80 LPC_SC->PCLKSEL0 |= (1 << 12); // 2)Set peripheral clock divider to /1, i.e. system clock
kenjiArai 5:af9fa3d0731c 81 LPC_PWM1->MR0 = div - 1; // 3)Match Register 0 is shared period counter for all PWM1
kenjiArai 5:af9fa3d0731c 82 LPC_PWM1->MR6 = (div + 1)>> 1; //
kenjiArai 5:af9fa3d0731c 83 LPC_PWM1->LER |= 1; // 4)Start updating at next period start
kenjiArai 5:af9fa3d0731c 84 LPC_PWM1->TCR = (1 << 0) || (1 << 3); // 5)Enable counter and PWM
kenjiArai 5:af9fa3d0731c 85 }
kenjiArai 5:af9fa3d0731c 86 #else
kenjiArai 5:af9fa3d0731c 87 #error "No support for this CPU"
kenjiArai 5:af9fa3d0731c 88 #endif
kenjiArai 5:af9fa3d0731c 89
kenjiArai 5:af9fa3d0731c 90 void example_freq_out(void)
kenjiArai 5:af9fa3d0731c 91 {
kenjiArai 5:af9fa3d0731c 92 PWM_EAMPLE();
kenjiArai 5:af9fa3d0731c 93 }
kenjiArai 5:af9fa3d0731c 94
kenjiArai 5:af9fa3d0731c 95 void read_sw_and_set_gate_time(void)
kenjiArai 5:af9fa3d0731c 96 {
kenjiArai 5:af9fa3d0731c 97 if (sw_10) {
kenjiArai 5:af9fa3d0731c 98 led_10 = 1;
kenjiArai 5:af9fa3d0731c 99 sw = 2;
kenjiArai 5:af9fa3d0731c 100 } else {
kenjiArai 5:af9fa3d0731c 101 led_10 = 0;
kenjiArai 5:af9fa3d0731c 102 sw = 0;
kenjiArai 5:af9fa3d0731c 103 }
kenjiArai 5:af9fa3d0731c 104 if (sw_01) {
kenjiArai 5:af9fa3d0731c 105 led_01 = 1;
kenjiArai 5:af9fa3d0731c 106 sw += 1;
kenjiArai 5:af9fa3d0731c 107 } else {
kenjiArai 5:af9fa3d0731c 108 led_01 = 0;
kenjiArai 5:af9fa3d0731c 109 }
kenjiArai 5:af9fa3d0731c 110 switch (sw) {
kenjiArai 5:af9fa3d0731c 111 case 0:
kenjiArai 5:af9fa3d0731c 112 t_gate = 0.001;
kenjiArai 5:af9fa3d0731c 113 break;
kenjiArai 5:af9fa3d0731c 114 case 1:
kenjiArai 5:af9fa3d0731c 115 t_gate = 0.01;
kenjiArai 5:af9fa3d0731c 116 break;
kenjiArai 5:af9fa3d0731c 117 case 2:
kenjiArai 5:af9fa3d0731c 118 t_gate = 0.1;
kenjiArai 5:af9fa3d0731c 119 break;
kenjiArai 5:af9fa3d0731c 120 case 3:
kenjiArai 5:af9fa3d0731c 121 default:
kenjiArai 5:af9fa3d0731c 122 t_gate = 1.0;
kenjiArai 5:af9fa3d0731c 123 break;
kenjiArai 5:af9fa3d0731c 124 }
mio 1:2a347c40b1da 125 }
mio 0:c988614df67a 126
kenjiArai 5:af9fa3d0731c 127 int main()
kenjiArai 5:af9fa3d0731c 128 {
kenjiArai 5:af9fa3d0731c 129 PRINTF("Frequency Counter by JH1PJL created on "__DATE__"\r\n");
kenjiArai 5:af9fa3d0731c 130 t_gate = 1.0;
kenjiArai 5:af9fa3d0731c 131 // Initialize LCD
kenjiArai 5:af9fa3d0731c 132 lcd.locate(0, 0); // 1st line top
kenjiArai 5:af9fa3d0731c 133 // 12345678
kenjiArai 5:af9fa3d0731c 134 lcd.printf("Fre-Cntr");
kenjiArai 5:af9fa3d0731c 135 lcd.locate(0, 1); // 2nd line top
kenjiArai 5:af9fa3d0731c 136 // 12345678
kenjiArai 5:af9fa3d0731c 137 lcd.puts(" JH1PJL ");
kenjiArai 5:af9fa3d0731c 138 lcd.setContrast(0x16);
kenjiArai 5:af9fa3d0731c 139 wait(5.0);
kenjiArai 5:af9fa3d0731c 140 lcd.locate(0, 1); // 2nd line top
kenjiArai 5:af9fa3d0731c 141 // 12345678
kenjiArai 5:af9fa3d0731c 142 lcd.puts(" ");
kenjiArai 5:af9fa3d0731c 143 // Set PWM for example
kenjiArai 5:af9fa3d0731c 144 example_freq_out();
kenjiArai 5:af9fa3d0731c 145 freqency = 0;
kenjiArai 5:af9fa3d0731c 146 while(true) {
kenjiArai 5:af9fa3d0731c 147 led_gate = 1;
kenjiArai 5:af9fa3d0731c 148 freqency = (float)fc.read_frequency(t_gate);
kenjiArai 5:af9fa3d0731c 149 led_gate = 0;
kenjiArai 5:af9fa3d0731c 150 wait(1.1 - t_gate);
kenjiArai 5:af9fa3d0731c 151 if (freqency == 0) {
kenjiArai 5:af9fa3d0731c 152 led_not_zero = 1;
kenjiArai 5:af9fa3d0731c 153 } else {
kenjiArai 5:af9fa3d0731c 154 led_not_zero = 0;
kenjiArai 5:af9fa3d0731c 155 }
kenjiArai 5:af9fa3d0731c 156 read_sw_and_set_gate_time();
kenjiArai 5:af9fa3d0731c 157 PRINTF("p30 f = %9.0f [Hz] gate %4.3f [Sec]\r\n", freqency/t_gate, t_gate);
kenjiArai 5:af9fa3d0731c 158 lcd.locate(0, 0); // 1st line top
kenjiArai 5:af9fa3d0731c 159 lcd.printf("%8.0f", freqency);
kenjiArai 5:af9fa3d0731c 160 lcd.locate(0, 1); // 2nd line top
kenjiArai 5:af9fa3d0731c 161 switch (sw) {
kenjiArai 5:af9fa3d0731c 162 case 0:
kenjiArai 5:af9fa3d0731c 163 // 12345678
kenjiArai 5:af9fa3d0731c 164 lcd.printf("x1000 Hz");
kenjiArai 5:af9fa3d0731c 165 break;
kenjiArai 5:af9fa3d0731c 166 case 1:
kenjiArai 5:af9fa3d0731c 167 // 12345678
kenjiArai 5:af9fa3d0731c 168 lcd.printf("x100 Hz");
kenjiArai 5:af9fa3d0731c 169 break;
kenjiArai 5:af9fa3d0731c 170 case 2:
kenjiArai 5:af9fa3d0731c 171 // 12345678
kenjiArai 5:af9fa3d0731c 172 lcd.printf("x10 Hz");
kenjiArai 5:af9fa3d0731c 173 break;
kenjiArai 5:af9fa3d0731c 174 case 3:
kenjiArai 5:af9fa3d0731c 175 default:
kenjiArai 5:af9fa3d0731c 176 // 12345678
kenjiArai 5:af9fa3d0731c 177 lcd.printf("x1 Hz");
kenjiArai 5:af9fa3d0731c 178 break;
kenjiArai 5:af9fa3d0731c 179 }
mio 1:2a347c40b1da 180 }
mio 1:2a347c40b1da 181 }