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impl printf

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Ajit Ananthadevan 2025-08-25 00:54:33 +10:00
parent 375ab76a2e
commit 7f4f50f9b7
5 changed files with 429 additions and 0 deletions
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65
myapps/printf-test/src/main.c Normal file
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#define LED_Pin LL_GPIO_PIN_4
#define LED_GPIO_Port GPIOA
#include "stm32g0xx_ll_rcc.h"
#include "stm32g0xx_ll_bus.h"
#include "stm32g0xx_ll_crs.h"
#include "stm32g0xx_ll_system.h"
#include "stm32g0xx_ll_exti.h"
#include "stm32g0xx_ll_cortex.h"
#include "stm32g0xx_ll_utils.h"
#include "stm32g0xx_ll_pwr.h"
#include "stm32g0xx_ll_dma.h"
#include "my_printf.h"
void SystemClock_Config(void)
{
LL_FLASH_SetLatency(LL_FLASH_LATENCY_2);
while(LL_FLASH_GetLatency() != LL_FLASH_LATENCY_2);
/* HSI configuration and activation */
LL_RCC_HSI_Enable();
while(LL_RCC_HSI_IsReady() != 1);
/* Main PLL configuration and activation */
LL_RCC_PLL_ConfigDomain_SYS(LL_RCC_PLLSOURCE_HSI, LL_RCC_PLLM_DIV_1, 8, LL_RCC_PLLR_DIV_2);
LL_RCC_PLL_Enable();
LL_RCC_PLL_EnableDomain_SYS();
while(LL_RCC_PLL_IsReady() != 1);
/* Set AHB prescaler*/
LL_RCC_SetAHBPrescaler(LL_RCC_SYSCLK_DIV_1);
/* Sysclk activation on the main PLL */
LL_RCC_SetSysClkSource(LL_RCC_SYS_CLKSOURCE_PLL);
while(LL_RCC_GetSysClkSource() != LL_RCC_SYS_CLKSOURCE_STATUS_PLL);
/* Set APB1 prescaler*/
LL_RCC_SetAPB1Prescaler(LL_RCC_APB1_DIV_1);
LL_Init1msTick(64000000);
/* Update CMSIS variable (which can be updated also through SystemCoreClockUpdate function) */
LL_SetSystemCoreClock(64000000);
}
int main(void)
{
/* Reset of all peripherals, Initializes the Flash interface and the Systick. */
LL_APB2_GRP1_EnableClock(LL_APB2_GRP1_PERIPH_SYSCFG);
LL_APB1_GRP1_EnableClock(LL_APB1_GRP1_PERIPH_PWR);
/** Disable the internal Pull-Up in Dead Battery pins of UCPD peripheral */
//LL_SYSCFG_DisableDBATT(LL_SYSCFG_UCPD1_STROBE | LL_SYSCFG_UCPD2_STROBE);
SystemClock_Config();
my_printf_config(115200);
while(1)
{
printf("Hello World\r\n");
LL_mDelay(250);
}
}