Repo re-org

1 files changed, 0 insertions, 241 deletions

diff --git a/gm_platform/fw/main.c b/gm_platform/fw/main.c
deleted file mode 100644
index 34c838b..0000000
--- a/gm_platform/fw/main.c
+++ /dev/null
@@ -1,241 +0,0 @@
-/* Megumin LED display firmware
- * Copyright (C) 2018 Sebastian Götte <code@jaseg.net>
- * 
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- * 
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- * 
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- */
-
-#include "global.h"
-#include "adc.h"
-#include "serial.h"
-
-
-volatile unsigned int sys_time_seconds = 0;
-volatile union leds leds;
-volatile int32_t gps_1pps_period_sysclk = -1;
-
-int main(void) {
-    /* Get GPIOA and SPI1 up to flash status LEDs */
-    RCC->AHBENR  |= RCC_AHBENR_GPIOAEN;
-    RCC->APB2ENR |= RCC_APB2ENR_SPI1EN;
-
-    GPIOA->MODER |=
-          (3<<GPIO_MODER_MODER2_Pos)  /* PA2  - LINE_MEAS */
-        | (1<<GPIO_MODER_MODER3_Pos)  /* PA3  - LED_STB */
-        | (1<<GPIO_MODER_MODER4_Pos)  /* PA4  - SD_CS */
-        | (2<<GPIO_MODER_MODER5_Pos)  /* PA5  - SCK */
-        | (2<<GPIO_MODER_MODER6_Pos)  /* PA6  - MISO */
-        | (2<<GPIO_MODER_MODER7_Pos)  /* PA7  - MOSI */
-        | (2<<GPIO_MODER_MODER9_Pos)  /* PA9  - HOST_RX */
-        | (2<<GPIO_MODER_MODER10_Pos);/* PA10 - HOST_TX */
-
-    /* Set shift register IO GPIO output speed */
-    GPIOA->OSPEEDR |=
-          (2<<GPIO_OSPEEDR_OSPEEDR3_Pos)   /* LED_STB */
-        | (2<<GPIO_OSPEEDR_OSPEEDR4_Pos)   /* SD_CS */
-        | (2<<GPIO_OSPEEDR_OSPEEDR5_Pos)   /* SCK */
-        | (2<<GPIO_OSPEEDR_OSPEEDR7_Pos)   /* MOSI */
-        | (2<<GPIO_OSPEEDR_OSPEEDR9_Pos);  /* HOST_RX */
-
-    GPIOA->AFR[0] = (0<<GPIO_AFRL_AFRL5_Pos) | (0<<GPIO_AFRL_AFRL6_Pos) | (0<<GPIO_AFRL_AFRL7_Pos);
-    GPIOA->AFR[1] = (1<<8) | (1<<4);
-
-    SPI1->CR1 =
-          SPI_CR1_SSM
-        | SPI_CR1_SSI
-        | SPI_CR1_CPOL
-        | SPI_CR1_CPHA
-        | (4<<SPI_CR1_BR_Pos) /* /32 ~1.5MHz */
-        | SPI_CR1_MSTR;
-    SPI1->CR2 = (7<<SPI_CR2_DS_Pos);
-    SPI1->CR1 |= SPI_CR1_SPE;
-    *((volatile uint8_t*)&(SPI1->DR)) = 0xff;
-
-    /* Wait for OCXO to settle */
-    for (int i=0; i<1000000; i++)
-        ;
-
-    /* Switch clock to PLL based on OCXO input */
-    RCC->CR |= RCC_CR_HSEBYP;
-    RCC->CR |= RCC_CR_HSEON;
-    RCC->CFGR &= ~RCC_CFGR_PLLMUL_Msk & ~RCC_CFGR_SW_Msk & ~RCC_CFGR_PPRE_Msk & ~RCC_CFGR_HPRE_Msk;
-    /* PLL config: 19.44MHz /2 x5 -> 48.6MHz */
-    RCC->CFGR |= ((5-2)<<RCC_CFGR_PLLMUL_Pos) | RCC_CFGR_PLLSRC_HSE_PREDIV;
-    RCC->CFGR2 = ((2-1)<<RCC_CFGR2_PREDIV_Pos);
-    RCC->CR |= RCC_CR_PLLON;
-    while (!(RCC->CR&RCC_CR_PLLRDY));
-    RCC->CFGR |= (2<<RCC_CFGR_SW_Pos);
-    SystemCoreClockUpdate();
-
-    /* Start systick */
-    SysTick_Config(SystemCoreClock/10); /* 100ms interval */
-    NVIC_EnableIRQ(SysTick_IRQn);
-    NVIC_SetPriority(SysTick_IRQn, 3<<5);
-
-    /* Turn on rest of periphery */
-    RCC->AHBENR  |= RCC_AHBENR_DMAEN | RCC_AHBENR_GPIOBEN | RCC_AHBENR_FLITFEN | RCC_AHBENR_CRCEN;
-    RCC->APB2ENR |= RCC_APB2ENR_SYSCFGEN | RCC_APB2ENR_ADCEN  | RCC_APB2ENR_DBGMCUEN |\
-                    RCC_APB2ENR_TIM1EN | RCC_APB2ENR_TIM16EN | RCC_APB2ENR_USART1EN;
-    RCC->APB1ENR |= RCC_APB1ENR_TIM3EN | RCC_APB1ENR_TIM14EN;
-
-    GPIOB->MODER |=
-          (2<<GPIO_MODER_MODER1_Pos); /* PB0  - GPS 1pps input */
-    GPIOB->AFR[0] = (0<<GPIO_AFRL_AFRL1_Pos);
-    GPIOB->PUPDR = 2<<GPIO_PUPDR_PUPDR1_Pos;
-
-    /* Configure TIM16 for LED update via SPI */
-    TIM16->CR2 = 0;
-    TIM16->DIER = TIM_DIER_UIE | TIM_DIER_CC1IE;
-    TIM16->CCMR1 = 0;
-    TIM16->CCR1 = 32;
-    TIM16->PSC = 48-1; /* 1us */
-    TIM16->ARR = 1000-1; /* 1ms */
-    TIM16->CR1 = TIM_CR1_CEN;
-    NVIC_EnableIRQ(TIM16_IRQn);
-
-    /* Configure TIM14 for GPS 1pps input capture */
-    TIM14->CCMR1 = (1<<TIM_CCMR1_CC1S_Pos) | (3<<TIM_CCMR1_IC1F_Pos);
-    TIM14->CCER = TIM_CCER_CC1E;
-    TIM14->PSC = 1;
-    TIM14->ARR = 0xffff;
-    TIM14->DIER = TIM_DIER_CC1IE | TIM_DIER_UIE;
-    TIM14->EGR = TIM_EGR_UG;
-    TIM14->CR1  |= TIM_CR1_CEN;
-    NVIC_EnableIRQ(TIM14_IRQn);
-
-    adc_init(1000000);
-	adc_timer_init(243, 200); /* 19.44 MHz / 243 -> 200 kHz; /200 -> 1 kHz */
-
-    usart_dma_init();
-
-    while (42) {
-        /* Do nothing and let the interrupts do all the work. */
-    }
-}
-
-void tim14_sr_cc1of(void) {} /* gdb hook */
-
-void TIM14_IRQHandler(void) {
-    static uint32_t gps_1pps_period = 0;
-    static uint32_t update_inc = 0;
-    static bool in_sync = false;
-
-    uint32_t sr = TIM14->SR;
-    if (sr & TIM_SR_CC1OF) {
-        TIM14->SR &= ~(TIM_SR_CC1IF | TIM_SR_CC1OF);
-        tim14_sr_cc1of();
-
-    }
-    if (sr & TIM_SR_UIF) {
-        TIM14->SR &= ~TIM_SR_UIF;
-        if (in_sync) {
-            gps_1pps_period += update_inc;
-            if (gps_1pps_period > 30000000) { /* Signal out of range */
-                in_sync = false;
-                gps_1pps_period_sysclk = -1;
-                gps_1pps_period = (uint32_t)-1;
-            }
-        }
-        update_inc = 0x10000;
-    }
-
-    if (sr & TIM_SR_CC1IF) { /* CC1 event (GPS 1pps input) */
-        /* Don't reset update event: If update event arrives while CC1 event is being processed leave UIF set to process
-         * update event immediately after return from ISR. */
-        uint16_t ccr = TIM14->CCR1;
-        if (in_sync) {
-            uint32_t new_period = gps_1pps_period + ccr;
-            if (new_period < 20000000 || new_period > 30000000) { /* Signal out of range */
-                in_sync = false;
-                gps_1pps_period_sysclk = -1;
-                gps_1pps_period = (uint32_t)-1;
-            } else {
-                if ((sr & TIM_SR_UIF) /* we processed an update event in this ISR */
-                    && (ccr > 0xc000) /* and the capture happened late in the cycle */
-                        ) {
-                    gps_1pps_period_sysclk = new_period - 0x10000;
-                    update_inc = 0x10000;
-                    gps_1pps_period = 0x10000 - ccr;
-                } else {
-                    gps_1pps_period_sysclk = new_period;
-                    update_inc = 0x10000 - ccr; /* remaining cycles in this period */
-                    gps_1pps_period = 0;
-                }
-                leds.pps = 200; /* ms */
-            }
-        } else {
-            gps_1pps_period = 0;
-            update_inc = 0x10000 - ccr; /* remaining cycles in this period */
-            in_sync = true;
-        }
-
-    }
-}
-
-void TIM16_IRQHandler(void) {
-    static int leds_update_counter = 0;
-    if (TIM16->SR & TIM_SR_UIF) {
-        TIM16->SR &= ~TIM_SR_UIF;
-
-        uint8_t bits = 0, mask = 1;
-        for (int i=0; i<8; i++) {
-            if (leds.arr[i]) {
-                leds.arr[i]--;
-                bits |= mask;
-            }
-            mask <<= 1;
-        }
-
-        if (leds_update_counter++ == 10) {
-            leds_update_counter = 0;
-
-            /* Workaround for SPI hardware bug: Even if configured to 8-bit mode, the SPI will do a 16-bit transfer if the
-             * data register is accessed through a 16-bit write. Unfortunately, the STMCube register defs define DR as an
-             * uint16_t, so we have to do some magic here to force an 8-bit write. */
-            *((volatile uint8_t*)&(SPI1->DR)) = bits;
-            GPIOA->BRR = 1<<3;
-        }
-    } else {
-        TIM16->SR &= ~TIM_SR_CC1IF;
-        GPIOA->BSRR = 1<<3;
-    }
-}
-
-void NMI_Handler(void) {
-    asm volatile ("bkpt");
-}
-
-void HardFault_Handler(void) __attribute__((naked));
-void HardFault_Handler() {
-    asm volatile ("bkpt");
-}
-
-void SVC_Handler(void) {
-    asm volatile ("bkpt");
-}
-
-
-void PendSV_Handler(void) {
-    asm volatile ("bkpt");
-}
-
-void SysTick_Handler(void) {
-    static int n = 0;
-    if (n++ == 10) {
-        n = 0;
-        sys_time_seconds++;
-        if (gps_1pps_period_sysclk < 0)
-            leds.pps = 200; /* ms */
-    }
-}
-