126 lines
4.1 KiB
C
126 lines
4.1 KiB
C
#include <target.h>
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#include <stm32wbxx.h>
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#include <stm32wbxx_ll_system.h>
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#include <stm32wbxx_ll_bus.h>
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#include <stm32wbxx_ll_utils.h>
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#include <stm32wbxx_ll_rcc.h>
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#include <stm32wbxx_ll_rtc.h>
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#include <stm32wbxx_ll_pwr.h>
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#include <stm32wbxx_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_11
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// LCD backlight
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#define BOOT_LCD_BL_PORT GPIOA
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#define BOOT_LCD_BL_PIN LL_GPIO_PIN_15
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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_1
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#define LED_GREEN_PORT GPIOA
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#define LED_GREEN_PIN LL_GPIO_PIN_2
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#define LED_BLUE_PORT GPIOA
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#define LED_BLUE_PIN LL_GPIO_PIN_3
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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_Init1msTick(4000000);
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LL_SetSystemCoreClock(4000000);
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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_UP);
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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_RCC_EnableRTC();
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LL_APB2_GRP1_EnableClock(LL_APB1_GRP1_PERIPH_RTCAPB);
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LL_PWR_EnableBkUpAccess();
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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 = BOOT_ADDRESS + OS_OFFSET;
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target_switch((void*)(BOOT_ADDRESS + OS_OFFSET));
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}
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