liz/flipperzero-firmware
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Bootloader: do not configure clock on start, just minimum LL init. (#269)

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* Bootloader: do not configure clock on start, just minimum LL init.
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あく 2020-12-18 20:51:08 +03:00 committed by GitHub
parent aa1a893d81
commit dde163fa61
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GPG Key ID: 4AEE18F83AFDEB23
2 changed files with 4 additions and 39 deletions
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39
bootloader/targets/f4/target.c
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@ -31,42 +31,8 @@
#define BOOT_USB_PIN (BOOT_USB_DM_PIN | BOOT_USB_DP_PIN)
void clock_init() {
LL_FLASH_SetLatency(LL_FLASH_LATENCY_3);
LL_RCC_MSI_Enable();
while(LL_RCC_MSI_IsReady() != 1) {
}
/* Main PLL configuration and activation */
LL_RCC_PLL_ConfigDomain_SYS(LL_RCC_PLLSOURCE_MSI, LL_RCC_PLLM_DIV_1, 32, LL_RCC_PLLR_DIV_2);
LL_RCC_PLL_Enable();
LL_RCC_PLL_EnableDomain_SYS();
while(LL_RCC_PLL_IsReady() != 1) {
}
/* Sysclk activation on the main PLL */
/* Set CPU1 prescaler*/
LL_RCC_SetAHBPrescaler(LL_RCC_SYSCLK_DIV_1);
/* Set CPU2 prescaler*/
LL_C2_RCC_SetAHBPrescaler(LL_RCC_SYSCLK_DIV_2);
LL_RCC_SetSysClkSource(LL_RCC_SYS_CLKSOURCE_PLL);
while(LL_RCC_GetSysClkSource() != LL_RCC_SYS_CLKSOURCE_STATUS_PLL) {
}
/* Set AHB SHARED prescaler*/
LL_RCC_SetAHB4Prescaler(LL_RCC_SYSCLK_DIV_1);
/* Set APB1 prescaler*/
LL_RCC_SetAPB1Prescaler(LL_RCC_APB1_DIV_1);
/* Set APB2 prescaler*/
LL_RCC_SetAPB2Prescaler(LL_RCC_APB2_DIV_1);
LL_Init1msTick(64000000);
/* Update CMSIS variable (which can be updated also through SystemCoreClockUpdate function) */
LL_SetSystemCoreClock(64000000);
LL_Init1msTick(4000000);
LL_SetSystemCoreClock(4000000);
}
void gpio_init() {
@ -119,7 +85,6 @@ void target_init() {
clock_init();
rtc_init();
gpio_init();
usb_wire_reset();
}