mirror of
https://github.com/DarkFlippers/unleashed-firmware
synced 2024-12-23 03:03:10 +00:00
154 lines
5.2 KiB
C
154 lines
5.2 KiB
C
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#include <target.h>
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#include <stm32l4xx.h>
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#include <stm32l4xx_ll_system.h>
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#include <stm32l4xx_ll_bus.h>
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#include <stm32l4xx_ll_utils.h>
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#include <stm32l4xx_ll_rcc.h>
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#include <stm32l4xx_ll_rtc.h>
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#include <stm32l4xx_ll_pwr.h>
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#include <stm32l4xx_ll_gpio.h>
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// Boot request enum
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#define BOOT_REQUEST_NONE 0x00000000
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#define BOOT_REQUEST_DFU 0xDF00B000
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// Boot to DFU pin
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#define BOOT_DFU_PORT GPIOB
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#define BOOT_DFU_PIN LL_GPIO_PIN_8
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// LCD backlight
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#define BOOT_LCD_BL_PORT GPIOB
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#define BOOT_LCD_BL_PIN LL_GPIO_PIN_6
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// LEDs
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#define LED_RED_PORT GPIOA
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#define LED_RED_PIN LL_GPIO_PIN_8
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#define LED_GREEN_PORT GPIOB
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#define LED_GREEN_PIN LL_GPIO_PIN_14
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#define LED_BLUE_PORT GPIOB
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#define LED_BLUE_PIN LL_GPIO_PIN_1
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// USB pins
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#define BOOT_USB_PORT GPIOA
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#define BOOT_USB_DM_PIN LL_GPIO_PIN_11
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#define BOOT_USB_DP_PIN LL_GPIO_PIN_12
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#define BOOT_USB_PIN (BOOT_USB_DM_PIN | BOOT_USB_DP_PIN)
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void clock_init() {
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LL_FLASH_SetLatency(LL_FLASH_LATENCY_4);
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LL_RCC_MSI_Enable();
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while(LL_RCC_MSI_IsReady() != 1) {
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}
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/* Main PLL configuration and activation */
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LL_RCC_PLL_ConfigDomain_SYS(LL_RCC_PLLSOURCE_MSI, LL_RCC_PLLM_DIV_1, 40, LL_RCC_PLLR_DIV_2);
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LL_RCC_PLL_Enable();
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LL_RCC_PLL_EnableDomain_SYS();
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while(LL_RCC_PLL_IsReady() != 1) {
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}
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/* Sysclk activation on the main PLL */
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LL_RCC_SetAHBPrescaler(LL_RCC_SYSCLK_DIV_1);
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LL_RCC_SetSysClkSource(LL_RCC_SYS_CLKSOURCE_PLL);
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while(LL_RCC_GetSysClkSource() != LL_RCC_SYS_CLKSOURCE_STATUS_PLL) {
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};
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/* Set APB1 & APB2 prescaler*/
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LL_RCC_SetAPB1Prescaler(LL_RCC_APB1_DIV_1);
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LL_RCC_SetAPB2Prescaler(LL_RCC_APB2_DIV_1);
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/* Set systick to 1ms in using frequency set to 80MHz */
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/* This frequency can be calculated through LL RCC macro */
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/* ex: __LL_RCC_CALC_PLLCLK_FREQ(__LL_RCC_CALC_MSI_FREQ(LL_RCC_MSIRANGESEL_RUN, LL_RCC_MSIRANGE_6),
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LL_RCC_PLLM_DIV_1, 40, LL_RCC_PLLR_DIV_2)*/
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LL_Init1msTick(80000000);
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/* Update CMSIS variable (which can be updated also through SystemCoreClockUpdate function) */
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LL_SetSystemCoreClock(80000000);
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}
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void gpio_init() {
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LL_AHB2_GRP1_EnableClock(LL_AHB2_GRP1_PERIPH_GPIOA);
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LL_AHB2_GRP1_EnableClock(LL_AHB2_GRP1_PERIPH_GPIOB);
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// USB D+
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LL_GPIO_SetPinMode(BOOT_USB_PORT, BOOT_USB_DP_PIN, LL_GPIO_MODE_OUTPUT);
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LL_GPIO_SetPinSpeed(BOOT_USB_PORT, BOOT_USB_DP_PIN, LL_GPIO_SPEED_FREQ_VERY_HIGH);
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LL_GPIO_SetPinOutputType(BOOT_USB_PORT, BOOT_USB_DP_PIN, LL_GPIO_OUTPUT_OPENDRAIN);
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// USB D-
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LL_GPIO_SetPinMode(BOOT_USB_PORT, BOOT_USB_DM_PIN, LL_GPIO_MODE_OUTPUT);
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LL_GPIO_SetPinSpeed(BOOT_USB_PORT, BOOT_USB_DM_PIN, LL_GPIO_SPEED_FREQ_VERY_HIGH);
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LL_GPIO_SetPinOutputType(BOOT_USB_PORT, BOOT_USB_DM_PIN, LL_GPIO_OUTPUT_OPENDRAIN);
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// Button: back
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LL_GPIO_SetPinMode(BOOT_DFU_PORT, BOOT_DFU_PIN, LL_GPIO_MODE_INPUT);
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LL_GPIO_SetPinPull(BOOT_DFU_PORT, BOOT_DFU_PIN, LL_GPIO_PULL_DOWN);
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// Display backlight
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LL_GPIO_SetPinMode(BOOT_LCD_BL_PORT, BOOT_LCD_BL_PIN, LL_GPIO_MODE_OUTPUT);
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LL_GPIO_SetPinSpeed(BOOT_LCD_BL_PORT, BOOT_LCD_BL_PIN, LL_GPIO_SPEED_FREQ_LOW);
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LL_GPIO_SetPinOutputType(BOOT_LCD_BL_PORT, BOOT_LCD_BL_PIN, LL_GPIO_OUTPUT_PUSHPULL);
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// LEDs
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LL_GPIO_SetPinMode(LED_RED_PORT, LED_RED_PIN, LL_GPIO_MODE_OUTPUT);
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LL_GPIO_SetPinOutputType(LED_RED_PORT, LED_RED_PIN, LL_GPIO_OUTPUT_OPENDRAIN);
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LL_GPIO_SetOutputPin(LED_RED_PORT, LED_RED_PIN);
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LL_GPIO_SetPinMode(LED_GREEN_PORT, LED_GREEN_PIN, LL_GPIO_MODE_OUTPUT);
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LL_GPIO_SetPinOutputType(LED_GREEN_PORT, LED_GREEN_PIN, LL_GPIO_OUTPUT_OPENDRAIN);
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LL_GPIO_SetOutputPin(LED_GREEN_PORT, LED_GREEN_PIN);
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LL_GPIO_SetPinMode(LED_BLUE_PORT, LED_BLUE_PIN, LL_GPIO_MODE_OUTPUT);
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LL_GPIO_SetPinOutputType(LED_BLUE_PORT, LED_BLUE_PIN, LL_GPIO_OUTPUT_OPENDRAIN);
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LL_GPIO_SetOutputPin(LED_BLUE_PORT, LED_BLUE_PIN);
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}
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void rtc_init() {
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LL_APB1_GRP1_EnableClock(LL_APB1_GRP1_PERIPH_PWR);
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LL_PWR_EnableBkUpAccess();
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LL_RCC_EnableRTC();
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}
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void lcd_backlight_on() {
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LL_GPIO_SetOutputPin(BOOT_LCD_BL_PORT, BOOT_LCD_BL_PIN);
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}
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void usb_wire_reset() {
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LL_GPIO_ResetOutputPin(BOOT_USB_PORT, BOOT_USB_PIN);
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LL_mDelay(10);
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LL_GPIO_SetOutputPin(BOOT_USB_PORT, BOOT_USB_PIN);
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}
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void target_init() {
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clock_init();
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rtc_init();
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gpio_init();
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usb_wire_reset();
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}
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int target_is_dfu_requested() {
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if(LL_RTC_BAK_GetRegister(RTC, LL_RTC_BKP_DR0) == BOOT_REQUEST_DFU) {
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LL_RTC_BAK_SetRegister(RTC, LL_RTC_BKP_DR0, BOOT_REQUEST_NONE);
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return 1;
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}
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if(LL_GPIO_IsInputPinSet(BOOT_DFU_PORT, BOOT_DFU_PIN)) {
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return 1;
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}
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return 0;
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}
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void target_switch(void* offset) {
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asm volatile("ldr r3, [%0] \n"
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"msr msp, r3 \n"
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"ldr r3, [%1] \n"
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"mov pc, r3 \n"
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:
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: "r"(offset), "r"(offset + 0x4)
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: "r3");
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}
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void target_switch2dfu() {
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LL_GPIO_ResetOutputPin(LED_BLUE_PORT, LED_BLUE_PIN);
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// Remap memory to system bootloader
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LL_SYSCFG_SetRemapMemory(LL_SYSCFG_REMAP_SYSTEMFLASH);
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target_switch(0x0);
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}
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void target_switch2os() {
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LL_GPIO_ResetOutputPin(LED_RED_PORT, LED_RED_PIN);
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SCB->VTOR = OS_OFFSET;
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target_switch((void*)(BOOT_ADDRESS + OS_OFFSET));
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}
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