Frequency counter library using GPS 1PPS signal and temperature controlled 50MHz Base clock. Ported from F411 Frequency Counter.

Dependencies:   RingBuff

Dependents:   Frequency_Cntr_1PPS_F746ZG

Fork of Frq_cuntr_full by Kenji Arai

Please refer following.
/users/kenjiArai/notebook/frequency-counters/

Revision:
4:9d3b3f0a3882
Parent:
3:339307e1dc0d
diff -r 339307e1dc0d -r 9d3b3f0a3882 frq_cuntr_full.cpp
--- a/frq_cuntr_full.cpp	Tue Dec 23 23:26:49 2014 +0000
+++ b/frq_cuntr_full.cpp	Thu Jan 01 05:04:20 2015 +0000
@@ -8,7 +8,7 @@
  *  http://mbed.org/users/kenjiArai/
  *      Additional functions and modification
  *      started: October   18th, 2014
- *      Revised: December  24th, 2014
+ *      Revised: January    1st, 2015
  *
  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
  * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE
@@ -17,6 +17,8 @@
  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  */
 
+#if defined(TARGET_NUCLEO_F411RE)
+
 #include "frq_cuntr_full.h"
 
 #ifdef DEBUG
@@ -26,16 +28,10 @@
 
 #ifdef DEBUG
 #define BAUD(x)         pcm.baud(x)
-#define GETC(x)         pcm.getc(x)
-#define PUTC(x)         pcm.putc(x)
 #define PRINTF(...)     pcm.printf(__VA_ARGS__)
-#define READABLE(x)     pcm.readable(x)
 #else
 #define BAUD(x)         {;}
-#define GETC(x)         {;}
-#define PUTC(x)         {;}
 #define PRINTF(...)     {;}
-#define READABLE(x)     {;}
 #endif
 
 namespace Frequency_counter
@@ -69,7 +65,7 @@
         tim2_ready_flg = 1;
 #if defined(DEBUG)
         debug_led = !debug_led;
-#endif
+#endif // defined(DEBUG)
     } else if (reg & TIM_SR_CC3IF) {    // Output Compare
         TIM2->SR &= ~TIM_SR_CC3IF;      // clear IC flag
         if (GPIOB->IDR & 0x0400) {      // Check PB10 status
@@ -84,7 +80,7 @@
         }
 #if defined(DEBUG)
         debug_led = !debug_led;
-#endif
+#endif // defined(DEBUG)
     }
 }
 
@@ -97,7 +93,7 @@
     tim3p4_ready_flg = 1;
 #if defined(DEBUG)
     debug_led = !debug_led;
-#endif
+#endif // defined(DEBUG)
 }
 
 //---------------------------------------------------------------------------------------
@@ -145,15 +141,11 @@
     ex_clock_freq = ex_clock;
     ex_clk_base = (uint32_t)(ex_clock_freq * 1000000); // MHz->Hz
     clk_hi_const = (uint32_t)(ex_clock_freq * 1000000 * 0.04);  // 40mS
-#if defined(CLOCK_DIVIDED_BY_2)
     uint32_t err = (uint32_t)(ex_clock_freq * 1000000 * 0.00001);  // 10ppm error range
-#else
-    uint32_t err = (uint32_t)(ex_clock_freq * 1000000 * 0.1);    // error range
-#endif
     clk_upper_limit = ex_clk_base + err;
     clk_lower_limit = ex_clk_base - err;
     PRINTF("EXTERNAL Clock mode\r\n");
-#else
+#else // defined(BASE_EXTERNAL_CLOCK)
     ex_clock_freq = 100;     // Internal 100MHz
     ex_clk_base = 100000000; // MHz->Hz
     clk_hi_const = 4000000;  // 40mS
@@ -161,7 +153,7 @@
     clk_upper_limit = ex_clk_base + err;
     clk_lower_limit = ex_clk_base - err;
     PRINTF("INTERNAL Clock mode\r\n");
-#endif
+#endif // defined(BASE_EXTERNAL_CLOCK)
 }
 
 // Read new frequency data
@@ -206,7 +198,7 @@
     }
 }
 
-// Avarage measued data GPS 1PPS by 50MHz Internal Clock
+// Avarage measued data GPS 1PPS by 25MHz External Clock
 uint32_t FRQ_CUNTR::read_avarage_1pps(void)
 {
     uint64_t total = 0;
@@ -224,15 +216,13 @@
         PRINTF("not");
     }
     PRINTF(" full, num= %3d , 1PPS/new= %9d\r\n", onepps_num, onepps_newest);
-#if defined(BASE_EXTERNAL_CLOCK)
-#if defined(ONEPPS_AVE)
     return onepps_cnt_avarage;
-#else
+}
+
+// Newest measued data GPS 1PPS
+uint32_t FRQ_CUNTR::read_newest_1pps(void)
+{
     return onepps_newest;
-#endif
-#else
-    return onepps_newest;
-#endif
 }
 
 // Check GPS condition
@@ -399,13 +389,9 @@
     TIM2->CCMR1 &= (uint16_t)~(TIM_CCMR1_IC1F | TIM_CCMR1_CC1S);    // input filter + input select
     TIM2->CCMR1 |= (uint16_t)TIM_CCMR1_CC1S_0;
     TIM2->CCER &= (uint16_t)~(TIM_CCER_CC1P | TIM_CCER_CC1NE | TIM_CCER_CC1NP); // positive edge
-#if defined(CLOCK_DIVIDED_BY_2)
     TIM2->SMCR  = (uint16_t)(TIM_SMCR_ECE| TIM_SMCR_ETPS_0 | TIM_SMCR_TS);  // clock/2 !!
-#else
-    TIM2->SMCR  = (uint16_t)(TIM_SMCR_ECE| TIM_SMCR_TS);  // clock/1 !!
-#endif
     TIM2->CR1 |= (uint16_t)TIM_CR1_CEN;          // Enable the TIM Counter
-#else
+#else // defined(BASE_EXTERNAL_CLOCK)
     // Initialize Timer2(32bit) for an internal up counter mode
     RCC->APB1ENR |= RCC_APB1ENR_TIM2EN;
     TIM2->CR1 &= (uint16_t)(~(TIM_CR1_DIR | TIM_CR1_CMS | TIM_CR1_CKD));  // count_up + div by 1
@@ -416,7 +402,7 @@
     TIM2->SMCR &= (uint16_t)~(TIM_SMCR_ECE | TIM_SMCR_TS | TIM_SMCR_SMS);
     TIM2->SMCR |= (uint16_t)0;     // Internal clock = 100MHz
     TIM2->CR1 |= (uint16_t)TIM_CR1_CEN;          // Enable the TIM Counter
-#endif
+#endif // defined(BASE_EXTERNAL_CLOCK)
     // PA1 -> Input Capture pin as Timer2 IC2
     GPIOA->AFR[0] &= 0xffffff0f;
     GPIOA->AFR[0] |= GPIO_AF1_TIM2 << 4;
@@ -450,7 +436,6 @@
     oc_hi_time = oc_set_time0;
     oc_lo_time = oc_set_time1;
     TIM2->CCR3 = TIM2->CNT + oc_hi_time;// Set the Capture Compare Register value
-#if 1
     // Only for Debug purpose
     BAUD(9600);
     //  PA
@@ -477,7 +462,6 @@
     PRINTF("TIM2->CCER   0x%08x:0x%08x\r\n",&TIM2->CCER, TIM2->CCER);
     PRINTF("TIM2->SMCR   0x%08x:0x%08x\r\n",&TIM2->SMCR, TIM2->SMCR);
     PRINTF("TIM2->CCR3   0x%08x:0x%08x\r\n\r\n",&TIM2->CCR3, TIM2->CCR3);
-#endif
     // Interrupt Timer2 IC2
     for (uint32_t i = 0; i < CNT_BF_SIZE; i++) {
         onepps_cnt[i] = 0;
@@ -559,7 +543,6 @@
     TIM4->CCMR1 |= (uint16_t)TIM_CCMR1_CC1S_0;
     TIM4->CCER  &= (uint16_t)~(TIM_CCER_CC1P | TIM_CCER_CC1NP); // positive edge
     TIM4->CCER  |= (uint16_t)TIM_CCER_CC1E;     // enable capture
-#if 1
     // Only for Debug purpose
     //  PB
     PRINTF("// PB6 -> Input Capture pin as Timer4 CH1/TI1\r\n");
@@ -599,7 +582,6 @@
     PRINTF("TIM4->CCER   0x%08x:0x%08x\r\n",&TIM4->CCER, TIM4->CCER);
     PRINTF("TIM4->SMCR   0x%08x:0x%08x\r\n\r\n",&TIM4->SMCR, TIM4->SMCR);
     PRINTF("RCC->APB1ENR 0x%08x:0x%08x\r\n\r\n",&RCC->APB1ENR, RCC->APB1ENR);
-#endif
     // Interrupt Timer3 IC2
     tim3p4_ready_flg = 0;
     tim3p4_cnt_data = 0;
@@ -616,7 +598,6 @@
 //---------------------------------------------------------------------------------------
 void FRQ_CUNTR::debug_printf_internal_data(void)
 {
-#if 1
     PRINTF("Debug information\r\n");
     PRINTF("gate_time       %f\r\n", gate_time);
     PRINTF("ex_clock_freq   %f\r\n", ex_clock_freq);
@@ -625,7 +606,8 @@
     PRINTF("clk_upper_limit %9d\r\n", clk_upper_limit);
     PRINTF("clk_lower_limit %9d\r\n", clk_lower_limit);
     PRINTF("\r\n");
-#endif
 }
 
 }   // Frequency_counter
+
+#endif      // #if defined(TARGET_NUCLEO_F411RE)