149 lines
4.0 KiB
C
149 lines
4.0 KiB
C
/*
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* RETRO TECH COMMUNITY
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* GAT Addon Firmware
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* by true
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*
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* version 0.0.3
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* Last Update 20240808
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*
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* code was made for different random addons I designed for dc32,
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* then adapted to each one. so things might be a mess.
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*
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* I had only a few hours on and off over a week to get the code done.
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* lots of shit was copied from demo code and adapted to work. certainly
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* isn't the best way to get this done.
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*
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* I know I could save some power, but seeing as all the badges burn it in
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* LEDs and almost nobody else power optimizes their badge code, who cares?
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*
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* sorry. wasn't procrastination I swear. all the ideas were last minute.
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*/
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#include <ch32v00x.h>
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#include <stdint.h>
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#include "src/adc.h"
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#include "src/btn.h"
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#include "src/config.h"
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#include "src/i2c.h"
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#include "src/led.h"
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#include "src/led_rgbprog.h"
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#include "src/rand.h"
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#include "src/ui.h"
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void systick_init(void)
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{
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SysTick->CMP = (SystemCoreClock / 512) - 1; // we want a 512Hz interrupt
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SysTick->CNT = 0; // clear counter
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SysTick->CTLR = 0xF; // start counter in /1 mode, enable interrupts, auto-reset counter
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SysTick->SR = 0; // clear count comparison flag
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NVIC_EnableIRQ(SysTicK_IRQn); // enable interrupt
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}
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void gpio_init()
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{
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GPIO_InitTypeDef gpio = {0};
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gpio.GPIO_Speed = GPIO_Speed_2MHz;
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// GAT SoftI2C, USART TX/RX; currently unused
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gpio.GPIO_Mode = GPIO_Mode_IPD;
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gpio.GPIO_Pin = GPIO_Pin_4 | GPIO_Pin_5 | GPIO_Pin_6;
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GPIO_Init(GPIOD, &gpio);
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gpio.GPIO_Pin = GPIO_Pin_1;
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GPIO_Init(GPIOA, &gpio);
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// lightsense LED cathode
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gpio.GPIO_Mode = GPIO_Mode_Out_PP;
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gpio.GPIO_Pin = GPIO_Pin_2;
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GPIOA->OUTDR = ~GPIO_Pin_2;
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GPIO_Init(GPIOA, &gpio);
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// lightsense LED anode
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gpio.GPIO_Pin = GPIO_Pin_0;
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GPIOD->OUTDR = ~GPIO_Pin_0;
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GPIO_Init(GPIOD, &gpio);
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// unused pins
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gpio.GPIO_Mode = GPIO_Mode_IPD;
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gpio.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_7;
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GPIO_Init(GPIOC, &gpio);
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gpio.GPIO_Pin = GPIO_Pin_2;
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GPIO_Init(GPIOD, &gpio);
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// I2C SCL, SCA for on-board devices
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gpio.GPIO_Pin = GPIO_Pin_1 | GPIO_Pin_2;
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gpio.GPIO_Mode = GPIO_Mode_AF_OD;
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GPIO_Init(GPIOC, &gpio);
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// IS_SDB (PC3) IS31FL3729 shutdown pin (active low)
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// WP (PC6) for EEPROM
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GPIOC->BCR = GPIO_Pin_3;
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GPIOC->BSHR = GPIO_Pin_6;
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gpio.GPIO_Mode = GPIO_Mode_Out_PP;
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gpio.GPIO_Pin = GPIO_Pin_3 | GPIO_Pin_6;
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GPIO_Init(GPIOC, &gpio);
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// BTN1 (PC5) pull up, BTN2 (PC4) pull down
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gpio.GPIO_Pin = GPIO_Pin_4;
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gpio.GPIO_Mode = GPIO_Mode_IPD;
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GPIO_Init(GPIOC, &gpio);
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gpio.GPIO_Pin = GPIO_Pin_5;
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gpio.GPIO_Mode = GPIO_Mode_IPU;
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GPIO_Init(GPIOC, &gpio);
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}
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int main(void)
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{
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// configure core
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NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
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SystemCoreClockUpdate();
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// enable peripheral clocks
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RCC_APB1PeriphClockCmd( RCC_APB1Periph_PWR | RCC_APB1Periph_I2C1, ENABLE);
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RCC_APB2PeriphClockCmd( RCC_APB2Periph_AFIO | RCC_APB2Periph_GPIOA |
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RCC_APB2Periph_GPIOC | RCC_APB2Periph_GPIOD |
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RCC_APB2Periph_ADC1 | RCC_APB2Periph_TIM1, ENABLE);
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// configure gpio pins, hard buttons (used for settings reset)
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gpio_init();
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// get saved settings, or reset if BTN1 is pushed
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i2c_init();
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userconf_load((BTN_PORT->INDR & (1 << BTN1_PIN)) ? 0 : 1);
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// configure hardware
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adc_init();
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btn_init();
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led_init();
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// configure random
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tinymt32_init(&tinymt32_s, DBGMCU_GetCHIPID() | userconf.checksum);
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// configure UI
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ui_init();
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// configure systick interrupt
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systick_init();
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// set up LEDs initially
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led_rgb_firstrun();
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// do system shit
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while(1) {
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__WFI();
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// after sending LEDs, run LED render program
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// to update the LED buffer for next time
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// we have approx 7ms to render... plenty of time
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if ((ticnt & 0x3) == 0) {
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ui_render();
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}
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}
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}
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