Frequency counter library using GPS 1PPS signal and temperature controlled 50MHz Base clock. Ported from F411 Frequency Counter.
Dependents: Frequency_Cntr_1PPS_F746ZG
Fork of Frq_cuntr_full by
Please refer following.
/users/kenjiArai/notebook/frequency-counters/
Diff: frq_cuntr_full.cpp
- Revision:
- 0:bfdc6ed58a06
- Child:
- 1:102230f2879d
diff -r 000000000000 -r bfdc6ed58a06 frq_cuntr_full.cpp --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/frq_cuntr_full.cpp Sat Nov 22 04:01:41 2014 +0000 @@ -0,0 +1,528 @@ +/* + * mbed Application program / Frequency Counter with GPS 1PPS Compensation + * Frequency Counter Hardware relataed program + * + * Copyright (c) 2014 Kenji Arai / JH1PJL + * http://www.page.sannet.ne.jp/kenjia/index.html + * http://mbed.org/users/kenjiArai/ + * Additional functions and modification + * started: October 18th, 2014 + * Revised: Nobember 22nd, 2014 + * + * 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 + * AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, + * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + */ + +#include "frq_cuntr_full.h" + +#ifdef DEBUG +Serial pcm(USBTX, USBRX); +DigitalOut debug_led(LED1); +#endif + +#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 +{ + #if defined(IRQ_DRIVE) + // TIM2 + uint8_t tim2_ready_flg; + uint32_t tim2_cnt_data; + uint32_t tim2_old_cnt_data; + // TIM3+4 + uint8_t tim3p4_ready_flg; + uint32_t tim3p4_cnt_data; + uint32_t tim3p4_old_cnt_data; + #endif + + //------------------------------------------------------------------------------------------------- + // Control Program + //------------------------------------------------------------------------------------------------- + // TIM2 IC2 Interrupt control + void irq_ic2_TIM2(void) + { + uint16_t reg; + + reg = TIM2->SR; + if (reg & TIM_SR_CC2IF){ + TIM2->SR &= ~TIM_SR_CC2IF; // clear IC flag + tim2_old_cnt_data = tim2_cnt_data; + tim2_cnt_data = TIM2->CCR2; + tim2_ready_flg = 1; + } else if (reg & TIM_SR_CC3IF){ + TIM2->SR &= ~TIM_SR_CC3IF; // clear IC flag + TIM2->CCR3 = TIM2->CCR3 + ONE_SECOND_COUNT; + } +#if defined(DEBUG) + debug_led = !debug_led; +#endif + } + + // TIM3 IC2 Interrupt control (same signal connected to TIM4 IC1) + void irq_ic2_TIM3P4(void) + { + TIM3->SR &= ~TIM_SR_CC2IF; // clear IC flag + TIM4->SR &= ~TIM_SR_CC1IF; + tim3p4_old_cnt_data = tim3p4_cnt_data; + tim3p4_cnt_data = (TIM4->CCR1 << 16) + TIM3->CCR2; + tim3p4_ready_flg = 1; +#if defined(DEBUG) + debug_led = !debug_led; +#endif + } + + //--------------------------------------------------------------------------------------- + // Frequency Counter + //--------------------------------------------------------------------------------------- + FRQ_CUNTR::FRQ_CUNTR(PinName f_in): _pin(f_in) + { + ; + } + + //--------------------------------------------------------------------------------------- + // TIM2 (32bit Counter + IC + OC) + //--------------------------------------------------------------------------------------- + // Read TIM2 captured counter value + uint32_t FRQ_CUNTR::read_ic2_counter_TIM2(void) + { + #if !defined(IRQ_DRIVE) + uint32_t count = 0 + + count = TIM2->CCR2; + TIM2->SR &= ~TIM_SR_CC2IF; // clear IC flag + PRINTF("T2:0x%08x\r\n", count); + return count; + #else + // return TIM2->CCR2; + return tim2_cnt_data; + #endif + } + + // Check TIM2 IC2 status + uint32_t FRQ_CUNTR::check_ic2_status_TIM2(void) + { + #if !defined(IRQ_DRIVE) + uint32_t status = 0; + + status = (TIM2->SR & TIM_SR_CC2IF) >> 2; + PRINTF("Status:0x%08x,", status); + return status; + #else + if (tim2_ready_flg == 0) { + return 0; + } else { + tim2_ready_flg = 0; + avarage_1pps(); + return 0xff; + } + #endif + } + + // Avarage measued data GPS 1PPS by 50MHz Internal Clock + void FRQ_CUNTR::avarage_1pps(void) + { + uint8_t status = 0; + + uint32_t diff = tim2_cnt_data - tim2_old_cnt_data; + onepps_cnt[onepps_num] = diff; + if ((onepps_cnt[onepps_num] > CNT_UPPER) || (onepps_cnt[onepps_num] < CNT_LOWER)) { + ; + } else { + status = 0; + if (++onepps_num >= CNT_BF_SIZE) { + onepps_num = 0; + onepps_buf_full = 1; + } + } + uint64_t total = 0; + if (onepps_buf_full == 1) { + for (uint32_t i = 0; i < CNT_BF_SIZE; i++) { + total += (uint64_t)onepps_cnt[i]; + } + onepps_cnt_avarage = total / CNT_BF_SIZE; + status = 2; + } else { + for (uint32_t i = 0; i < onepps_num; i++) { + total += (uint64_t)onepps_cnt[i]; + } + onepps_cnt_avarage = total / onepps_num; + status = 1; + } + // PRINTF("num= %3d , status= %1d , 1PPS= %9d , 1PPS/Ave= %9d , ", onepps_num, status, diff, onepps_cnt_avarage); + PRINTF("num= %3d , status= %1d , 1PPS= %9d , 1PPS/Ave= %9d , ", onepps_num, status, diff, 0); + } + + //--------------------------------------------------------------------------------------- + // TIM3+TIM4 (32bit Counter + IC) + //--------------------------------------------------------------------------------------- + // Read TIM3+4(as 32bit) captured counter value + uint32_t FRQ_CUNTR::read_ic2_counter_TIM3P4(void) + { + #if !defined(IRQ_DRIVE) + uint32_t count0 = 0, count1 = 0; + + count0 = TIM3->CCR2; + count1 = TIM4->CCR1; + TIM3->SR &= ~TIM_SR_CC2IF; // clear IC flag + TIM4->SR &= ~TIM_SR_CC1IF; + PRINTF("T4:0x%08x,T3:0x%08x\r\n", count1, count0); + count0 = (count1 << 16) + count0; + return count0; + #else + return tim3p4_cnt_data; + #endif + } + + // Check TIM3 IC2 & TIM4 IC1 status + uint32_t FRQ_CUNTR::check_ic2_status_TIM3P4(void) + { + #if !defined(IRQ_DRIVE) + uint32_t status0 = 0, status1 = 0; + + status0 = (TIM3->SR & TIM_SR_CC2IF) >> 2; + status1 = (TIM4->SR & TIM_SR_CC1IF) >> 1; + status0 = (status1 << 16) + status0; + PRINTF("Status:0x%08x,", status0); + return status0; + #else + if (tim3p4_ready_flg == 0) { + return 0; + } else { + tim3p4_ready_flg = 0; + return 0xff; + } + #endif + } + + //--------------------------------------------------------------------------------------- + // Frequency check for test purpose + //--------------------------------------------------------------------------------------- + // Read TIM2 Clock frequency + uint32_t FRQ_CUNTR::read_frequency_TIM2(float gate_time) + { + uint32_t freq = 0; + + TIM2->CNT = 0; + wait(gate_time); // Gate time for count + freq = TIM2->CNT; // read counter + PRINTF("Clock freq.=%10d [Hz], gate= %4.2f [Sec]\r\n", freq, gate_time); + return freq; // return counter data + } + + // Read TIM3(+TIM4) Input frequency + uint32_t FRQ_CUNTR::read_frequency_TIM3P4(float gate_time) + { + uint32_t freq0 = 0, freq1 = 0; + + TIM3->CNT = 0; + TIM4->CNT = 0; + TIM3->CNT = 0; + wait(gate_time); // Gate time for count + freq0 = TIM3->CNT; + freq1 = TIM4->CNT; + freq0 = (freq1 << 16) + freq0; + PRINTF("Input freq.=%10d [Hz], gate= %4.2f [Sec]\r\n", freq0, gate_time); + return freq0; // read counter + } + + //--------------------------------------------------------------------------------------- + // Clock output for test purpose + //--------------------------------------------------------------------------------------- + // Output internal clock + void FRQ_CUNTR::port_mco1_mco2_set(uint8_t select) + { + // PA8 -> MCO_1 + GPIOA->AFR[1] &= 0xfffffff0; + GPIOA->AFR[1] |= GPIO_AF0_MCO << 0; + GPIOA->MODER &= ~(GPIO_MODER_MODER8); // AF + GPIOA->MODER |= GPIO_MODER_MODER8_1; + GPIOA->OTYPER &= ~(GPIO_OTYPER_OT_8); // Output Push-Pull=0 + GPIOA->OSPEEDR |= GPIO_OSPEEDER_OSPEEDR8;// Speed full=11 + GPIOA->PUPDR &= ~(GPIO_PUPDR_PUPDR8); // Pull-up=01 + GPIOA->PUPDR |= GPIO_PUPDR_PUPDR8_0; + // PC9 -> MCO_2 + GPIOC->AFR[1] &= 0xffffff0f; + GPIOC->AFR[1] |= GPIO_AF0_MCO << 4; + GPIOC->MODER &= ~(GPIO_MODER_MODER9); // AF + GPIOC->MODER |= GPIO_MODER_MODER9_1; + GPIOC->OTYPER &= ~(GPIO_OTYPER_OT_9); // Output Push-Pull=0 + GPIOC->OSPEEDR |= GPIO_OSPEEDER_OSPEEDR9;// Speed full=11 + GPIOC->PUPDR &= ~(GPIO_PUPDR_PUPDR9); // Pull-up=01 + GPIOC->PUPDR |= GPIO_PUPDR_PUPDR9_0; + // Select output clock source + RCC->CFGR &= 0x009fffff; + if (select == 1){ + // MC01 output HSE 1/1, MCO2 output SYSCLK 1/1 + // MCO2 MCO2PRE MCO1PRE MCO1 + RCC->CFGR |= (0x0 << 30) + (0x0 << 27) + (0x0 << 24) + (0x2 << 21); + PRINTF("Set MCO1(PA8):HSE/1, MCO2(PC9):SYSCLK/1\r\n"); + } else if (select == 2){ + // MC01 output HSE 1/2, MCO2 output SYSCLK 1/2 + // MCO2 MCO2PRE MCO1PRE MCO1 + RCC->CFGR |= (0x0 << 30) + (0x4 << 27) + (0x4 << 24) + (0x2 << 21); + PRINTF("Set MCO1(PA8):HSE/2, MCO2(PC9):SYSCLK/2\r\n"); + } else { // select = 4 and other wrong order + // MC01 output HSE 1/4, MCO2 output SYSCLK 1/4 + // MCO2 MCO2PRE MCO1PRE MCO1 + RCC->CFGR |= (0x0 << 30) + (0x6 << 27) + (0x6 << 24) + (0x2 << 21); + PRINTF("Set MCO1(PA8):HSE/4, MCO2(PC9):SYSCLK/4\r\n"); + } + } + + //--------------------------------------------------------------------------------------- + // Initialize TIM2 and TIM3+4 + //--------------------------------------------------------------------------------------- + void FRQ_CUNTR::initialize_Freq_counter(void) + { + initialize_TIM2(); + initialize_TIM3P4(); + } + + // Initialize TIM2 + // Internal clock (50MHz) and IC2 for GPS 1pps signal measurement + void FRQ_CUNTR::initialize_TIM2(void) + { + #if defined(BASE_EXTERNAL_CLOCK) + // PA0 -> Counter frequency input pin as Timer2 CH1/TI1 + RCC->AHB1ENR |= (RCC_AHB1ENR_GPIOAEN); + GPIOA->AFR[0] &= 0xfffffff0; + GPIOA->AFR[0] |= GPIO_AF1_TIM2; + GPIOA->MODER &= ~(GPIO_MODER_MODER0); // AF + GPIOA->MODER |= GPIO_MODER_MODER0_1; + GPIOA->PUPDR &= ~(GPIO_PUPDR_PUPDR0); // PU + GPIOA->PUPDR |= GPIO_PUPDR_PUPDR0_0; + // Initialize Timer2(32bit) for an external 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 + TIM2->CR1 |= TIM_CR1_URS; + TIM2->ARR = 0xffffffff; + TIM2->PSC = 0x0000; + TIM2->CCER &= (uint16_t)~TIM_CCER_CC1E; // Disable the CC1 + 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 + TIM2->SMCR &= (uint16_t)~(TIM_SMCR_ECE | TIM_SMCR_TS | TIM_SMCR_SMS); // external mode 1 + TIM2->SMCR |= (uint16_t)( TIM_TS_TI1FP1 | TIM_SLAVEMODE_EXTERNAL1); // ECE must be ZERO!!!! + TIM2->CR1 |= (uint16_t)TIM_CR1_CEN; // Enable the TIM Counter + #else + // Initialize Timer2(32bit) for an external 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 + TIM2->CR1 |= TIM_CR1_URS; + TIM2->ARR = 0xffffffff; + TIM2->PSC = 0x0000; + TIM2->CCER &= (uint16_t)~TIM_CCER_CC1E; // Disable the CC1 + 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 + // PA1 -> Input Capture pin as Timer2 IC2 + GPIOA->AFR[0] &= 0xffffff0f; + GPIOA->AFR[0] |= GPIO_AF1_TIM2 << 4; + GPIOA->MODER &= ~(GPIO_MODER_MODER1); // AF + GPIOA->MODER |= GPIO_MODER_MODER1_1; + GPIOA->PUPDR &= ~(GPIO_PUPDR_PUPDR1); + GPIOA->PUPDR |= GPIO_PUPDR_PUPDR1_0; // PU + // Initialize Timer2 I.C.2 + TIM2->CCER &= (uint16_t)~TIM_CCER_CC2E; // Disable the CC2 + TIM2->CCMR1 &= (uint16_t)~(TIM_CCMR1_IC2F | TIM_CCMR1_CC2S);// input filter + input select + TIM2->CCMR1 |= (uint16_t)TIM_CCMR1_CC2S_0; + TIM2->CCER &= (uint16_t)~(TIM_CCER_CC2P | TIM_CCER_CC2NP); // positive edge + TIM2->CCER |= (uint16_t)TIM_CCER_CC2E; // enable capture + // PB10 -> Output Compare pin as Timer2 CH3/OC3 + GPIOB->AFR[1] &= 0xfffff0ff; + GPIOB->AFR[1] |= GPIO_AF1_TIM2 << 8; + GPIOB->MODER &= ~(GPIO_MODER_MODER10); // AF + GPIOB->MODER |= GPIO_MODER_MODER10_1; + GPIOB->OTYPER &= ~(GPIO_OTYPER_OT_10);// Output Push-Pull=0 + GPIOB->OSPEEDR |= GPIO_OSPEEDER_OSPEEDR10;// Speed full=11 + GPIOB->PUPDR &= ~(GPIO_PUPDR_PUPDR10); // Pull-up=01 + GPIOB->PUPDR |= GPIO_PUPDR_PUPDR10_0; + // Initialize Timer2 O.C.3 + TIM2->CCER &= (uint16_t)~TIM_CCER_CC3E; // Reset the CC3E Bit + TIM2->CCMR2 &= (uint16_t)~(TIM_CCMR2_OC3M | TIM_CCMR2_CC3S | + TIM_CCMR2_OC3PE | TIM_CCMR2_OC3CE | TIM_CCMR2_OC3FE); + TIM2->CCMR2 |= (TIM_CCMR2_OC3M_0 | TIM_CCMR2_OC3M_1); + TIM2->CCER &= (uint16_t)~TIM_CCER_CC3P;// Reset the Output Polarity level + TIM2->CCER |= (uint16_t)TIM_CCER_CC3E; // Set the CC3E Bit + TIM2->CCR3 = TIM2->CNT + ONE_SECOND_COUNT;// Set the Capture Compare Register value + // Only for Debug purpose + BAUD(9600); + // PA + PRINTF("// Timer2(32bit) for an internal up counter mode\r\n"); + PRINTF("// PA1 -> Input Capture pin as Timer2 CH2/TI2\r\n"); + PRINTF("GPIOA->AFR[0]0x%08x:0x%08x\r\n",&GPIOA->AFR[0], GPIOA->AFR[0]); + PRINTF("GPIOA->AFR[1]0x%08x:0x%08x\r\n",&GPIOA->AFR[1], GPIOA->AFR[1]); + PRINTF("GPIOA->MODER 0x%08x:0x%08x\r\n",&GPIOA->MODER, GPIOA->MODER); + PRINTF("GPIOA->PUPDR 0x%08x:0x%08x\r\n",&GPIOA->PUPDR, GPIOA->PUPDR); + // PB + PRINTF("// PB10 -> Output Compare pin as Timer2 CH3/TI3\r\n"); + PRINTF("GPIOB->AFR[0]0x%08x:0x%08x\r\n",&GPIOB->AFR[0], GPIOB->AFR[0]); + PRINTF("GPIOB->AFR[1]0x%08x:0x%08x\r\n",&GPIOB->AFR[1], GPIOB->AFR[1]); + PRINTF("GPIOB->MODER 0x%08x:0x%08x\r\n",&GPIOB->MODER, GPIOB->MODER); + PRINTF("GPIOB->PUPDR 0x%08x:0x%08x\r\n",&GPIOB->PUPDR, GPIOB->PUPDR); + // TIM2 + PRINTF("// PA1 -> Timer2 IC2\r\n"); + PRINTF("// PB10-> Timer2 OC3\r\n"); + PRINTF("TIM2->CR1 0x%08x:0x%08x\r\n",&TIM2->CR1, TIM2->CR1); + PRINTF("TIM2->ARR 0x%08x:0x%08x\r\n",&TIM2->ARR, TIM2->ARR); + PRINTF("TIM2->PSC 0x%08x:0x%08x\r\n",&TIM2->PSC, TIM2->PSC); + PRINTF("TIM2->CCMR1 0x%08x:0x%08x\r\n",&TIM2->CCMR1, TIM2->CCMR1); + PRINTF("TIM2->CCMR2 0x%08x:0x%08x\r\n",&TIM2->CCMR2, TIM2->CCMR2); + 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); + #if defined(IRQ_DRIVE) + // Interrupt Timer2 IC2 + for (uint32_t i = 0; i < CNT_BF_SIZE; i++) { + onepps_cnt[i] = 0; + } + onepps_num = 0; + onepps_ready_flg = 0; + onepps_buf_full = 0; + onepps_cnt_avarage = 0; + tim2_ready_flg = 0; + tim2_cnt_data = 0; + tim2_old_cnt_data = 0; + TIM2->SR &= ~(TIM_SR_CC2IF + TIM_SR_CC3IF); // clear IC flag + TIM2->DIER |= TIM_DIER_CC2IE + TIM_DIER_CC3IE; + // void (FRQ_CUNTER::*Func)() = &FRQ_CUNTER::irq_ic2_TIM2; + NVIC_SetVector(TIM2_IRQn, (uint32_t)irq_ic2_TIM2); + // NVIC_SetVector(TIM2_IRQn, (uint32_t)Func); + NVIC_ClearPendingIRQ(TIM2_IRQn); + NVIC_EnableIRQ(TIM2_IRQn); + #endif + } + + // Initialize TIM3 and TIM4 as 32bit counter (TIM3(16bit) + TIM4(16bit)) + // TIM3 clock input is unkown freq.(measuring freq.) and TIM4 is slave counter + // 1sec gate signal connected both TIM3 IC2 and TIM4 IC1 + void FRQ_CUNTR::initialize_TIM3P4(void) + { + // PC6 -> Unkown frequency input pin as Timer3 CH1/TI1 + RCC->AHB1ENR |= (RCC_AHB1ENR_GPIOCEN); + GPIOC->AFR[0] &= 0xf0ffffff; + GPIOC->AFR[0] |= GPIO_AF2_TIM3 << 24; + GPIOC->MODER &= ~(GPIO_MODER_MODER6); // AF + GPIOC->MODER |= GPIO_MODER_MODER6_1; + GPIOC->PUPDR &= ~(GPIO_PUPDR_PUPDR6); + GPIOC->PUPDR |= GPIO_PUPDR_PUPDR6_0; // PU + // Initialize Timer3(16bit) for an external up counter mode + RCC->APB1ENR |= RCC_APB1ENR_TIM3EN; + TIM3->CR1 &= (uint16_t)(~(TIM_CR1_DIR | TIM_CR1_CMS | TIM_CR1_CKD));// count_up + div by 1 + TIM3->CR1 |= (uint16_t)TIM_CR1_URS; + TIM3->ARR = 0xffff; + TIM3->CCER &= (uint16_t)~TIM_CCER_CC1E; // Disable the CC1 + TIM3->CCMR1 &= (uint16_t)~(TIM_CCMR1_IC1F | TIM_CCMR1_CC1S); // input filter + input select + TIM3->CCMR1 |= (uint16_t)TIM_CCMR1_CC1S_0; + TIM3->CCER &= (uint16_t)~(TIM_CCER_CC1P | TIM_CCER_CC1NE | TIM_CCER_CC1NP);// positive edge + TIM3->SMCR &= (uint16_t)~(TIM_SMCR_ECE | TIM_SMCR_TS | TIM_SMCR_SMS);// external mode 1 + TIM3->SMCR |= (uint16_t)( TIM_TS_TI1FP1 | TIM_SLAVEMODE_EXTERNAL1); // ECE must be ZERO!!!! + TIM3->CR2 &= (uint16_t)~(TIM_CR2_TI1S | TIM_CR2_MMS); + TIM3->CR2 |= (uint16_t)TIM_CR2_MMS_1; // TRGO update + TIM3->CR1 |= (uint16_t)TIM_CR1_CEN; // Enable the TIM Counter + // Initialize Timer4(16bit) for an slave up counter of TIM3 + RCC->APB1ENR |= RCC_APB1ENR_TIM4EN; + TIM4->CR1 &= (uint16_t)(~(TIM_CR1_DIR | TIM_CR1_CMS | TIM_CR1_CKD));// count_up + div by 1 + TIM4->CR1 |= (uint16_t)TIM_CR1_URS; + TIM4->ARR = 0xffff; + TIM4->CCER &= (uint16_t)TIM_CCER_CC1E; // Capture enable + TIM4->SMCR &= (uint16_t)~(TIM_SMCR_ECE | TIM_SMCR_TS | TIM_SMCR_SMS);// external mode 1 + TIM4->SMCR |= (uint16_t)( TIM_TS_ITR2 | TIM_SLAVEMODE_EXTERNAL1);// ECE must be ZERO!!!! + TIM4->CR2 &= (uint16_t)~(TIM_CR2_TI1S | TIM_CR2_MMS); + TIM4->CR1 |= (uint16_t)TIM_CR1_CEN; // Enable the TIM Counter + // PC7 -> Input Capture pin as Timer3 IC2 + GPIOC->AFR[0] &= 0x0fffffff; + GPIOC->AFR[0] |= GPIO_AF2_TIM3 << 28; + GPIOC->MODER &= ~(GPIO_MODER_MODER7); // AF + GPIOC->MODER |= GPIO_MODER_MODER7_1; + GPIOC->PUPDR &= ~(GPIO_PUPDR_PUPDR7); + GPIOC->PUPDR |= GPIO_PUPDR_PUPDR7_0; // PU + // Initialize Timer3 IC2 + TIM3->CCER &= (uint16_t)~TIM_CCER_CC2E; // Disable the CC2 + TIM3->CCMR1 &= (uint16_t)~(TIM_CCMR1_IC2F | TIM_CCMR1_CC2S);// input filter + input select + TIM3->CCMR1 |= (uint16_t)TIM_CCMR1_CC2S_0; + TIM3->CCER &= (uint16_t)~(TIM_CCER_CC2P | TIM_CCER_CC2NP); // positive edge + TIM3->CCER |= (uint16_t)TIM_CCER_CC2E; // enable capture + // PB6 -> Input Capture pin as Timer4 IC1 + GPIOB->AFR[0] &= 0xf0ffffff; + GPIOB->AFR[0] |= GPIO_AF2_TIM4 << 24; + GPIOB->MODER &= ~(GPIO_MODER_MODER6); // AF + GPIOB->MODER |= GPIO_MODER_MODER6_1; + GPIOB->PUPDR &= ~(GPIO_PUPDR_PUPDR6); + GPIOB->PUPDR |= GPIO_PUPDR_PUPDR6_0; // Pull-up=01 + // Initialize Timer4 IC1 + TIM4->CCER &= (uint16_t)~TIM_CCER_CC1E; + TIM4->CCMR1 &= ((uint16_t)~TIM_CCMR1_CC1S) & ((uint16_t)~TIM_CCMR1_IC1F); + 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 + // Only for Debug purpose + // PB + PRINTF("// PB6 -> Input Capture pin as Timer4 CH1/TI1\r\n"); + PRINTF("GPIOB->AFR[0]0x%08x:0x%08x\r\n",&GPIOB->AFR[0], GPIOB->AFR[0]); + PRINTF("GPIOB->AFR[1]0x%08x:0x%08x\r\n",&GPIOB->AFR[1], GPIOB->AFR[1]); + PRINTF("GPIOB->MODER 0x%08x:0x%08x\r\n",&GPIOB->MODER, GPIOB->MODER); + PRINTF("GPIOB->PUPDR 0x%08x:0x%08x\r\n",&GPIOB->PUPDR, GPIOB->PUPDR); + PRINTF("GPIOB->OTYPER 0x%08x:0x%08x\r\n",&GPIOB->OTYPER, GPIOB->OTYPER); + PRINTF("GPIOB->OSPEEDR 0x%08x:0x%08x\r\n",&GPIOB->OSPEEDR, GPIOB->OSPEEDR); + // PC + PRINTF("// PC6 -> unkown frequency input pin as Timer3 CH1/TI1\r\n"); + PRINTF("// PC7 -> Input Capture pin as Timer3 CH2/TI2\r\n"); + PRINTF("GPIOC->AFR[0]0x%08x:0x%08x\r\n",&GPIOC->AFR[0], GPIOC->AFR[0]); + PRINTF("GPIOC->AFR[1]0x%08x:0x%08x\r\n",&GPIOC->AFR[1], GPIOC->AFR[1]); + PRINTF("GPIOC->MODER 0x%08x:0x%08x\r\n",&GPIOC->MODER, GPIOC->MODER); + PRINTF("GPIOC->PUPDR 0x%08x:0x%08x\r\n",&GPIOC->PUPDR, GPIOC->PUPDR); + PRINTF("GPIOC->OTYPER 0x%08x:0x%08x\r\n",&GPIOC->OTYPER, GPIOC->OTYPER); + PRINTF("GPIOC->OSPEEDR 0x%08x:0x%08x\r\n",&GPIOC->OSPEEDR, GPIOC->OSPEEDR); + // TIM3 + PRINTF("// PC6 -> Timer3(16bit) for an external up counter mode\r\n"); + PRINTF("// PC7 -> Timer3 IC2\r\n"); + PRINTF("TIM3->CR1 0x%08x:0x%08x\r\n",&TIM3->CR1, TIM3->CR1); + PRINTF("TIM3->ARR 0x%08x:0x%08x\r\n",&TIM3->ARR, TIM3->ARR); + PRINTF("TIM3->PSC 0x%08x:0x%08x\r\n",&TIM3->PSC, TIM3->PSC); + PRINTF("TIM3->CCMR1 0x%08x:0x%08x\r\n",&TIM3->CCMR1, TIM3->CCMR1); + PRINTF("TIM3->CCMR2 0x%08x:0x%08x\r\n",&TIM3->CCMR2, TIM3->CCMR2); + PRINTF("TIM3->CCER 0x%08x:0x%08x\r\n",&TIM3->CCER, TIM3->CCER); + PRINTF("TIM3->SMCR 0x%08x:0x%08x\r\n",&TIM3->SMCR, TIM3->SMCR); + // TIM4 + PRINTF("// none-> Timer4(16bit) for an slave counter\r\n"); + PRINTF("// PB6 -> Timer4 IC1\r\n"); + PRINTF("TIM4->CR1 0x%08x:0x%08x\r\n",&TIM4->CR1, TIM4->CR1); + PRINTF("TIM4->ARR 0x%08x:0x%08x\r\n",&TIM4->ARR, TIM4->ARR); + PRINTF("TIM4->PSC 0x%08x:0x%08x\r\n",&TIM4->PSC, TIM4->PSC); + PRINTF("TIM4->CCMR1 0x%08x:0x%08x\r\n",&TIM4->CCMR1, TIM4->CCMR1); + PRINTF("TIM4->CCMR2 0x%08x:0x%08x\r\n",&TIM4->CCMR2, TIM4->CCMR2); + 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); + #if defined(IRQ_DRIVE) + // Interrupt Timer3 IC2 + tim3p4_ready_flg = 0; + tim3p4_cnt_data = 0; + tim3p4_old_cnt_data = 0; + TIM3->SR &= ~TIM_SR_CC2IF; // clear IC flag + TIM4->SR &= ~TIM_SR_CC1IF; + TIM3->DIER |= TIM_DIER_CC2IE; + NVIC_SetVector(TIM3_IRQn, (uint32_t)irq_ic2_TIM3P4); + NVIC_ClearPendingIRQ(TIM3_IRQn); + NVIC_EnableIRQ(TIM3_IRQn); + #endif + } + +} // Frequency_counter