flipperzero-firmware/bootloader/targets/f4/target.c

126 lines
4.1 KiB
C

#include <target.h>
#include <stm32wbxx.h>
#include <stm32wbxx_ll_system.h>
#include <stm32wbxx_ll_bus.h>
#include <stm32wbxx_ll_utils.h>
#include <stm32wbxx_ll_rcc.h>
#include <stm32wbxx_ll_rtc.h>
#include <stm32wbxx_ll_pwr.h>
#include <stm32wbxx_ll_gpio.h>
// Boot request enum
#define BOOT_REQUEST_NONE 0x00000000
#define BOOT_REQUEST_DFU 0xDF00B000
// Boot to DFU pin
#define BOOT_DFU_PORT GPIOB
#define BOOT_DFU_PIN LL_GPIO_PIN_11
// LCD backlight
#define BOOT_LCD_BL_PORT GPIOA
#define BOOT_LCD_BL_PIN LL_GPIO_PIN_15
// LEDs
#define LED_RED_PORT GPIOA
#define LED_RED_PIN LL_GPIO_PIN_1
#define LED_GREEN_PORT GPIOA
#define LED_GREEN_PIN LL_GPIO_PIN_2
#define LED_BLUE_PORT GPIOA
#define LED_BLUE_PIN LL_GPIO_PIN_3
// USB pins
#define BOOT_USB_PORT GPIOA
#define BOOT_USB_DM_PIN LL_GPIO_PIN_11
#define BOOT_USB_DP_PIN LL_GPIO_PIN_12
#define BOOT_USB_PIN (BOOT_USB_DM_PIN | BOOT_USB_DP_PIN)
void clock_init() {
LL_Init1msTick(4000000);
LL_SetSystemCoreClock(4000000);
}
void gpio_init() {
LL_AHB2_GRP1_EnableClock(LL_AHB2_GRP1_PERIPH_GPIOA);
LL_AHB2_GRP1_EnableClock(LL_AHB2_GRP1_PERIPH_GPIOB);
// USB D+
LL_GPIO_SetPinMode(BOOT_USB_PORT, BOOT_USB_DP_PIN, LL_GPIO_MODE_OUTPUT);
LL_GPIO_SetPinSpeed(BOOT_USB_PORT, BOOT_USB_DP_PIN, LL_GPIO_SPEED_FREQ_VERY_HIGH);
LL_GPIO_SetPinOutputType(BOOT_USB_PORT, BOOT_USB_DP_PIN, LL_GPIO_OUTPUT_OPENDRAIN);
// USB D-
LL_GPIO_SetPinMode(BOOT_USB_PORT, BOOT_USB_DM_PIN, LL_GPIO_MODE_OUTPUT);
LL_GPIO_SetPinSpeed(BOOT_USB_PORT, BOOT_USB_DM_PIN, LL_GPIO_SPEED_FREQ_VERY_HIGH);
LL_GPIO_SetPinOutputType(BOOT_USB_PORT, BOOT_USB_DM_PIN, LL_GPIO_OUTPUT_OPENDRAIN);
// Button: back
LL_GPIO_SetPinMode(BOOT_DFU_PORT, BOOT_DFU_PIN, LL_GPIO_MODE_INPUT);
LL_GPIO_SetPinPull(BOOT_DFU_PORT, BOOT_DFU_PIN, LL_GPIO_PULL_UP);
// Display backlight
LL_GPIO_SetPinMode(BOOT_LCD_BL_PORT, BOOT_LCD_BL_PIN, LL_GPIO_MODE_OUTPUT);
LL_GPIO_SetPinSpeed(BOOT_LCD_BL_PORT, BOOT_LCD_BL_PIN, LL_GPIO_SPEED_FREQ_LOW);
LL_GPIO_SetPinOutputType(BOOT_LCD_BL_PORT, BOOT_LCD_BL_PIN, LL_GPIO_OUTPUT_PUSHPULL);
// LEDs
LL_GPIO_SetPinMode(LED_RED_PORT, LED_RED_PIN, LL_GPIO_MODE_OUTPUT);
LL_GPIO_SetPinOutputType(LED_RED_PORT, LED_RED_PIN, LL_GPIO_OUTPUT_OPENDRAIN);
LL_GPIO_SetOutputPin(LED_RED_PORT, LED_RED_PIN);
LL_GPIO_SetPinMode(LED_GREEN_PORT, LED_GREEN_PIN, LL_GPIO_MODE_OUTPUT);
LL_GPIO_SetPinOutputType(LED_GREEN_PORT, LED_GREEN_PIN, LL_GPIO_OUTPUT_OPENDRAIN);
LL_GPIO_SetOutputPin(LED_GREEN_PORT, LED_GREEN_PIN);
LL_GPIO_SetPinMode(LED_BLUE_PORT, LED_BLUE_PIN, LL_GPIO_MODE_OUTPUT);
LL_GPIO_SetPinOutputType(LED_BLUE_PORT, LED_BLUE_PIN, LL_GPIO_OUTPUT_OPENDRAIN);
LL_GPIO_SetOutputPin(LED_BLUE_PORT, LED_BLUE_PIN);
}
void rtc_init() {
LL_RCC_EnableRTC();
LL_APB2_GRP1_EnableClock(LL_APB1_GRP1_PERIPH_RTCAPB);
LL_PWR_EnableBkUpAccess();
}
void lcd_backlight_on() {
LL_GPIO_SetOutputPin(BOOT_LCD_BL_PORT, BOOT_LCD_BL_PIN);
}
void usb_wire_reset() {
LL_GPIO_ResetOutputPin(BOOT_USB_PORT, BOOT_USB_PIN);
LL_mDelay(10);
LL_GPIO_SetOutputPin(BOOT_USB_PORT, BOOT_USB_PIN);
}
void target_init() {
clock_init();
rtc_init();
gpio_init();
usb_wire_reset();
}
int target_is_dfu_requested() {
if(LL_RTC_BAK_GetRegister(RTC, LL_RTC_BKP_DR0) == BOOT_REQUEST_DFU) {
LL_RTC_BAK_SetRegister(RTC, LL_RTC_BKP_DR0, BOOT_REQUEST_NONE);
return 1;
}
LL_mDelay(100);
if(!LL_GPIO_IsInputPinSet(BOOT_DFU_PORT, BOOT_DFU_PIN)) {
return 1;
}
return 0;
}
void target_switch(void* offset) {
asm volatile("ldr r3, [%0] \n"
"msr msp, r3 \n"
"ldr r3, [%1] \n"
"mov pc, r3 \n"
:
: "r"(offset), "r"(offset + 0x4)
: "r3");
}
void target_switch2dfu() {
LL_GPIO_ResetOutputPin(LED_BLUE_PORT, LED_BLUE_PIN);
// Remap memory to system bootloader
LL_SYSCFG_SetRemapMemory(LL_SYSCFG_REMAP_SYSTEMFLASH);
target_switch(0x0);
}
void target_switch2os() {
LL_GPIO_ResetOutputPin(LED_RED_PORT, LED_RED_PIN);
SCB->VTOR = BOOT_ADDRESS + OS_OFFSET;
target_switch((void*)(BOOT_ADDRESS + OS_OFFSET));
}