Driver Filter WIP

1 files changed, 13 insertions, 181 deletions

diff --git a/center_fw/main.c b/center_fw/main.c
index 71d3f00..3008dd2 100644
--- a/center_fw/main.c
+++ b/center_fw/main.c
@@ -17,113 +17,6 @@
 
 #include "global.h"
 
-#include "adc.h"
-#include "8seg_protocol.h"
-#include "transmit.h"
-
-volatile unsigned int sys_time = 0;
-volatile unsigned int sys_time_seconds = 0;
-uint16_t jitter_meas_avg_ns = 0;
-
-void TIM1_BRK_UP_TRG_COM_Handler() {
-    TIM1->SR &= ~TIM_SR_UIF_Msk;
-}
-
-void set_drv_gpios(uint8_t val) {
-    val = ~val;
-    int a=!(val&1), b=!(val&2), c=!(val&4), d=!(val&8);
-    GPIOA->BSRR = (((!a)<<3 | (!b)<<7 | (!c)<<6 | (!d)<<4)<<16) | ((a<<3) | (b<<7) | (c<<6) | (d<<4));
-}
-
-uint8_t out_state = 0x0f;
-void set_outputs(uint8_t val[8]) {
-    /* TODO implement BCM for digital brightness control */
-    int x = 0;
-    for (int i=0; i<8; i++)
-        if (val[i] > 127)
-            x |= 1<<i;
-    out_state = x;
-}
-
-void set_outputs_binary(int mask, int global_brightness) {
-    uint8_t val[8];
-    for (int i=0; i<8; i++)
-        val[i] = (mask & (1<<i)) ? global_brightness : 0;
-    set_outputs(val);
-}
-
-void set_load(bool load) {
-    GPIOA->BSRR = (1<<2) << (load ? 0 : 16);
-}
-
-void blank(void) {
-    GPIOA->BRR = (1<<9) | (1<<10);
-    set_drv_gpios(0);
-}
-
-bool has_sync = 0;
-void unblank_low(int bit) {
-    if (backchannel_frame) { /* Set from protocol.c */
-        if (tx_next_bit() == 1)
-            set_load(1);
-        else /* 0; but also TX_IDLE */
-            set_load(0);
-
-    } else if (has_sync) {
-        if (bit) {
-            //GPIOA->BSRR = (1<<10);
-            set_drv_gpios(out_state & 0xf);
-
-        } else {
-            //GPIOA->BSRR = (1<<9);
-            set_drv_gpios(out_state >> 4);
-        }
-    }
-}
-
-int sync_ctr = 0xffff;
-void TIM3_IRQHandler(void) {
-    if (TIM3->SR & TIM_SR_CC2IF) {
-        if (sync_ctr > 10)
-            has_sync = 0;
-        else
-            sync_ctr += 1;
-        EXTI->IMR = (1<<0);
-        GPIOB->BSRR = (1<<1);
-        GPIOA->BRR = (1<<9) | (1<<10);
-
-    } else if (TIM3->SR & TIM_SR_CC3IF) {
-        int bit = GPIOA->IDR & (1<<5); /* Sample current polarity */
-        unblank_low(!bit);
-
-    } else {
-        blank();
-    }
-
-    TIM3->SR = 0;
-}
-
-void EXTI0_1_IRQHandler(void) {
-    static uint32_t jitter_meas_sum = 0, jitter_meas_cnt = 0;
-    EXTI->PR = (1<<0);
-
-    /* Store old counter value for jitter measurement. Let it overflow to handle negative offsets. */
-    int16_t cnt = (int16_t)TIM3->CNT;
-    /* Re-initialize the counter to align it with the signal edge */
-    TIM3->EGR  |= TIM_EGR_UG;
-
-    /* Don't handle overflow of _sum here since this value is only for monitoring anyway */
-    jitter_meas_sum += (cnt >= 0) ? cnt : -cnt;
-    if (++jitter_meas_cnt == 1000) { /* One measurement roughly every 800ms */
-        jitter_meas_avg_ns = jitter_meas_sum;
-    }
-
-    EXTI->IMR = 0;
-    GPIOB->BRR = (1<<1);
-    has_sync = 1;
-    sync_ctr = 0;
-}
-
 int main(void) {
     //RCC->CR |= RCC_CR_HSEON;
     //while (!(RCC->CR&RCC_CR_HSERDY));
@@ -133,82 +26,30 @@ int main(void) {
     while (!(RCC->CR&RCC_CR_PLLRDY));
     RCC->CFGR |= (2<<RCC_CFGR_SW_Pos);
     SystemCoreClockUpdate();
-    SysTick_Config(SystemCoreClock/1000); /* 1ms interval */
 
     /* Turn on lots of neat things */
-    RCC->AHBENR  |= RCC_AHBENR_DMAEN | RCC_AHBENR_GPIOAEN | RCC_AHBENR_GPIOBEN | RCC_AHBENR_FLITFEN;
-    RCC->APB2ENR |= RCC_APB2ENR_SYSCFGEN | RCC_APB2ENR_ADCEN| RCC_APB2ENR_DBGMCUEN | RCC_APB2ENR_TIM1EN | RCC_APB2ENR_TIM1EN;;
-    RCC->APB1ENR |= RCC_APB1ENR_TIM3EN;
-
-    /* TIM3 foo */
-    TIM3->CCMR2 = (6<<TIM_CCMR2_OC4M_Pos); /* PWM Mode 1 to get a clean trigger signal */
-    TIM3->CCER  = TIM_CCER_CC4E; /* Enable capture/compare unit 4 connected to ADC */
-    TIM3->CCER  = TIM_CCER_CC3E; /* Enable capture/compare unit 3 for unblank interrupt */
-    TIM3->CCER  = TIM_CCER_CC2E;
-
-    TIM3->PSC   =  48-1; /* 48MHz -> 1MHz */
-    TIM3->CCR2  = 800-1-1;
-    TIM3->CCR3  = 100-1; /* CC3 is used for unblanking in the ISR, fires 30us after beginning of cycle. */
-    TIM3->CCR4  = 800-100-1; /* CC4 is ADC trigger, fire 30us before end of cycle. */
-    TIM3->ARR   = 800-1; /* 1MHz -> 5kHz */
-
-    TIM3->DIER |= TIM_DIER_CC2IE | TIM_DIER_CC3IE | TIM_DIER_CC4IE | TIM_DIER_UIE;
-
-    TIM3->CR1  |= TIM_CR1_CEN;
-    NVIC_EnableIRQ(TIM3_IRQn);
-    NVIC_SetPriority(TIM3_IRQn, 3<<5);
-
-    GPIOB->MODER |= (1<<GPIO_MODER_MODER1_Pos);
-    GPIOB->OSPEEDR |= (2<<GPIO_OSPEEDR_OSPEEDR1_Pos);
-
-    EXTI->IMR = (1<<0); /* PA0 Vmeas_A for sync */
-    EXTI->RTSR |= (1<<0);
-    NVIC_EnableIRQ(EXTI0_1_IRQn);
-    NVIC_SetPriority(EXTI0_1_IRQn, 4<<5);
+    RCC->AHBENR  |= RCC_AHBENR_GPIOAEN;
 
     GPIOA->MODER |=
-          (0<<GPIO_MODER_MODER0_Pos)  /* PA0  - Vmeas_A to ADC */
-        | (0<<GPIO_MODER_MODER1_Pos)  /* PA1  - Unused */
-        | (1<<GPIO_MODER_MODER2_Pos)  /* PA2  - LOAD */
-        | (1<<GPIO_MODER_MODER3_Pos)  /* PA3  - CH0 */
-        | (1<<GPIO_MODER_MODER4_Pos)  /* PA4  - CH3 */
-        | (0<<GPIO_MODER_MODER5_Pos)  /* PA5  - TP1 */
-        | (1<<GPIO_MODER_MODER6_Pos)  /* PA6  - CH2 */
-        | (1<<GPIO_MODER_MODER7_Pos)  /* PA7  - CH1 */
-        | (1<<GPIO_MODER_MODER9_Pos)  /* PA9  - synchronous rectifier bypass A */
-        | (1<<GPIO_MODER_MODER10_Pos);/* PA10 - synchronous rectifier bypass B */
-
-    GPIOA->PUPDR |= (2<<GPIO_PUPDR_PUPDR5_Pos);
-
-    /* Set shift register IO GPIO output speed */
-    GPIOA->OSPEEDR |=
-          (2<<GPIO_OSPEEDR_OSPEEDR2_Pos)   /* LOAD */
-        | (2<<GPIO_OSPEEDR_OSPEEDR3_Pos)   /* CH0 */
-        | (2<<GPIO_OSPEEDR_OSPEEDR4_Pos)   /* CH3 */
-        | (2<<GPIO_OSPEEDR_OSPEEDR6_Pos)   /* CH2 */
-        | (2<<GPIO_OSPEEDR_OSPEEDR7_Pos)   /* CH1 */
-        | (2<<GPIO_OSPEEDR_OSPEEDR9_Pos)   /* synchronous rectifier bypass A */
-        | (2<<GPIO_OSPEEDR_OSPEEDR10_Pos); /* synchronous rectifier bypass B */
-
-    set_drv_gpios(0);
-
-    protocol_init();
+          (1<<GPIO_MODER_MODER0_Pos)
+        | (1<<GPIO_MODER_MODER1_Pos);
 
     int cnt = 0;
-    int seg_c = 0;
+    int ph = 0;
     while (42) {
-        /*
-        if (cnt > 10000) {
+        if (cnt > 5000) {
             cnt = 0;
-            seg_c += 1;
-            if (seg_c == 8)
-                seg_c = 0;
-            set_outputs_binary(1<<seg_c, 255);
+            ph += 1;
+            ph %= 4;
         } else {
             cnt = cnt+1;
         }
-        */
-        /* idle */
+        switch (ph) {
+            case 0: GPIOA->ODR = 1; break;
+            case 1: GPIOA->ODR = 3; break;
+            case 2: GPIOA->ODR = 2; break;
+            case 3: GPIOA->ODR = 0; break;
+        }
     }
 }
 
@@ -230,12 +71,3 @@ void PendSV_Handler(void) {
     asm volatile ("bkpt");
 }
 
-void SysTick_Handler(void) {
-    static int n = 0;
-    sys_time++;
-    if (n++ == 1000) {
-        n = 0;
-        sys_time_seconds++;
-    }
-}
-