Bootloader: do not configure clock on start, just minimum LL init. (#269)

* Bootloader: do not configure clock on start, just minimum LL init.

applications/cc1101-workaround/cc1101-workaround.cpp

@@ -598,7 +598,7 @@ extern "C" void cc1101_workaround(void* p) {
                                 true,  true, true,  false, true,  false, true};
 
             for(uint8_t n = 0; n < 10; n++) {
-                for(uint8_t i = 0; i < sizeof(SEQ)/sizeof(SEQ[0]); i++) {
+                for(uint8_t i = 0; i < sizeof(SEQ) / sizeof(SEQ[0]); i++) {
                     if(SEQ[i]) {
                         gpio_write(&cc1101_g0_gpio, false);
                         delay_us(ONE_ON);
@@ -614,7 +614,7 @@ extern "C" void cc1101_workaround(void* p) {
 
                 osDelay(4);
             }
-            
+
             gpio_write(&cc1101_g0_gpio, false);
         }
 

bootloader/targets/f4/target.c

@@ -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();
 }