Update README.md

README.md

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-# STM32F4_Cortex_M4
+## STM32F4DISCOVERY
 
-The demo code for STM32F4DISCOVERY Discovery kit with HAL library 
+STM32F407VGT6 (LQFP100)
+- Flash: 1024KB
+- SRAM: 192KB
+
+Demo code for the STM32F4DISCOVERY Discovery kit using the HAL library.
+
+<a href="url"><img src="./images/stm32f4_disco.png" width="600"></a>  
+
+### Projects
+
+- [01_GPIO](workspace/01_GPIO/)
+- [02_UART](workspace/02_UART/)
+- [03_UART_printf](workspace/03_UART_printf/)
+- [04_ADC_Continuous_Conversion](workspace/04_ADC_Continuous_Conversion/)
+- [05_GPIO_Interrupt_EXTI](workspace/05_GPIO_Interrupt_EXTI/)
+- [07_Timer](workspace/07_Timer/)
+- [08_ADC_Single_Conversion](workspace/08_ADC_Single_Conversion/)
+- [09_ADC_Interrupt](workspace/09_ADC_Interrupt/)
+- [10_UART_Interrupt](workspace/10_UART_Interrupt/)
+- [11_ADC_DMA](workspace/11_ADC_DMA/)
+- [12_ADC_DMA_MultiChannel](workspace/12_ADC_DMA_MultiChannel/)
+- [13_UART_DMA](workspace/13_UART_DMA/)
+- [14_DMA_MemoryToMemory](workspace/14_DMA_MemoryToMemory/)
+- [15_SPI_Polling](workspace/15_SPI_Polling/)
+- [16_SPI_Interrupt](workspace/16_SPI_Interrupt/)
+- [17_SPI_DMA](workspace/17_SPI_DMA/)
+- [18_I2C_ADXL345](workspace/18_I2C_ADXL345/)
+- [19_RTC](workspace/19_RTC/)
+- [20_Linkersrcipt_Section_Custom_Memory](workspace/20_Linkersrcipt_Section_Custom_Memory/)
+- [21_Bootloader1](workspace/21_Bootloader1/)
+- [21_Bootloader1_App](workspace/21_Bootloader1_App/)
+- [22_Bootloader2](workspace/22_Bootloader2/)
+- [22_Bootloader2_App](workspace/22_Bootloader2_App/)