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154 lines
4.1 KiB
C
154 lines
4.1 KiB
C
/**
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* main.c - Firmware entry point and main loop for game or testing.
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* Copyright (C) 2020 Clyne Sullivan
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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* See the GNU General Public License for more details.
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*/
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#include "buttons.h"
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#include "dogs.h"
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#include "hal.h"
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//#include "2048.h"
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#include "flapbird.h"
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/*
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* Progress:
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* - Serial through LPUART1 works (38400 baud, takes over swdio pins)
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* - Display comm. over SPI, can clear screen
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* - Can read buttons through PAL (through interrupts now)
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* - Use ADC to read Vintref, print to screen in mV
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* - Sleep mode via WFI, saves ~0.5mA (we're running around 1.1mA)
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* - Run at 512kHz, only use HSI for ADC: 360uA (jumpy)
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* - Drop to 1.2V Vcore (range 3), enable low-V detector: 375uA (steady) (440uA at 1MHz)
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* - Run at 4MHz, drop to low-power run/sleep @ 64kHz for idle: 375uA (also lowered contrast)
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* - Sleep display for 'pause': ~240uA
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*
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* - Use RTC for delay, Stop mode when idle: 348uA
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*
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* - Flappy bird is going, 2048 next
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*/
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static int readVddmv();
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static void alarm_callback(RTCDriver *rtcp, rtcevent_t event)
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{
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(void)rtcp;
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(void)event;
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static bool sleep = false;
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bool sleep_button = (button_state & BUTTON_1) != 0;
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if (sleep && !sleep_button)
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return;
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RCC->ICSCR |= 6 << RCC_ICSCR_MSIRANGE_Pos;
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dogs_set_sleep(false);
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if (sleep_button) {
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sleep ^= true;
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if (sleep) {
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draw_number(DISP_WIDTH - 33, 0,
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!(PWR->CSR & PWR_CSR_PVDO) ? readVddmv() : 1);
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dogs_flush();
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}
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}
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if (!sleep)
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flapbird_loop();
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dogs_set_sleep(true);
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}
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int main(void)
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{
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halInit();
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RCC->CR &= ~(RCC_CR_PLLON); // Ensure that the PLL is off (unused).
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//chSysInit();
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buttons_init();
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dogs_init();
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flapbird_init();
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static const RTCWakeup wakeupcfg = {
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(0 << 16) | // wucksel (37k /16 = ~2k)
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200 // wut (hope for 10Hz)
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};
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rtcSTM32SetPeriodicWakeup(&RTCD1, &wakeupcfg);
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rtcSetCallback(&RTCD1, alarm_callback);
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RCC->CR &= ~RCC_CR_HSION;
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PWR->CR |= PWR_CR_LPSDSR | PWR_CR_ULP;
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PWR->CR |= PWR_CR_LPRUN;
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SCB->SCR = 6;
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//FLASH->ACR |= FLASH_ACR_SLEEP_PD;
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// Below code for serial -- note that it cuts off debugging, and MUST be used in a thread
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//chThdSleepMilliseconds(2000);
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//palSetPadMode(GPIOA, 13, PAL_MODE_ALTERNATE(6));
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//palSetPadMode(GPIOA, 14, PAL_MODE_ALTERNATE(6));
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//sdStart(&LPSD1, NULL);
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//chnWrite(&LPSD1, (const uint8_t *)"Hello World!\r\n", 14);
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/* This is now the idle thread loop, you may perform here a low priority
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task but YOU MUST NEVER TRY TO SLEEP OR WAIT in this loop. Note that
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this tasks runs at the lowest priority level so any instruction added
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here will be executed after all other tasks have been started. */
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while (1)
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asm("wfe");
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}
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void HardFault_Handler()
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{
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while (1);
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}
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static volatile bool adc_is_complete = false;
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static void adc_callback(ADCDriver *adcd)
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{
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(void)adcd;
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adc_is_complete = true;
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}
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static const ADCConfig adccfg = {
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.dummy = 0
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};
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static const ADCConversionGroup adcgrpcfg = {
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.circular = false,
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.num_channels = 1,
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.end_cb = adc_callback,
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.error_cb = NULL,
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.cfgr1 = ADC_CFGR1_RES_12BIT, /* CFGR1 */
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.cfgr2 = 0, /* CFGR2 */
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.tr = ADC_TR(0, 0), /* TR */
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.smpr = ADC_SMPR_SMP_1P5, /* SMPR */
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.chselr = ADC_CHSELR_CHSEL17 /* CHSELR */
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};
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int readVddmv()
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{
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adcsample_t reading = 0;
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RCC->CR |= RCC_CR_HSION;
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while (!(RCC->CR & RCC_CR_HSIRDY));
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adcStart(&ADCD1, &adccfg);
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adcSTM32EnableVREF(&ADCD1);
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adcStartConversion(&ADCD1, &adcgrpcfg, &reading, 1);
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while (!adc_is_complete);
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adcStopConversion(&ADCD1);
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adcSTM32DisableVREF(&ADCD1);
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adcStop(&ADCD1);
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RCC->CR &= ~RCC_CR_HSION;
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return 3000 * /* CAL */ *((adcsample_t *)0x1FF80078) / reading;
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}
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