RESOLVED: UART in STM32F4_Discovery_FW_V1.1.0

[selmesal]

Posted on October 12, 2016 at 14:46

Hello, 

I was working off of TIM_PWM_Output (Peripheral_Examples from FW_V1.1.0) and would like to add UART connection to it.How do I initialize UART if using FW_V1.1.0?Thanks, Sel 

[slimen]

Posted on October 12, 2016 at 15:47

Hello Sel,

You can use

http://www.st.com/content/st_com/en/products/development-tools/software-development-tools/stm32-software-development-tools/stm32-configurators-and-code-generators/stm32cubemx.html

tool with the peripherals that you want which help you to develop the basic configuration of your application and generate an initialization code.Moreover, you can have a look to any UART example in STM32CubeF4 to learn UART use and initialisation: STM32Cube_FW_F4_V1.13.0\Projects\STM32F4-Discovery\Examples\UART\UART_PrintfThe reference-Manual and datasheet related to your device will be your support for more details.You are using an old firmware version and should update the last one v1.13.0 through this

http://www.st.com/content/st_com/en/products/embedded-software/mcus-embedded-software/stm32-embedded-software/stm32cube-embedded-software/stm32cubef4.html

, as there is always enhancement and bug fixes in the new release.Regards

[selmesal]

Posted on October 12, 2016 at 19:13

Hi, 

Thanks. The only example I found for PWM_Output was based on FW_V1.1.0. That is why I ended up working with this level. I would like to eventually migrate to the latest. But, for now, I wanted to add USART functionality into the existing example code. Is there a migration tool that I might not be aware of?Thanks,Sel

[Tesla DeLorean]

Posted on October 12, 2016 at 19:44

// STM32 USART1 (Tx PB.6, Rx PB.7) STM32F4 Discovery - sourcer32@gmail.com
#include ''stm32f4_discovery.h''
/**************************************************************************************/
void RCC_Configuration(void)
{
/* --------------------------- System Clocks Configuration -----------------*/
/* USART1 clock enable */
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE);
/* GPIOB clock enable */
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOB, ENABLE);
}
/**************************************************************************************/
void GPIO_Configuration(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
/*-------------------------- GPIO Configuration ----------------------------*/
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6 | GPIO_Pin_7;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOB, &GPIO_InitStructure);
/* Connect USART pins to AF */
GPIO_PinAFConfig(GPIOB, GPIO_PinSource6, GPIO_AF_USART1); // USART1_TX
GPIO_PinAFConfig(GPIOB, GPIO_PinSource7, GPIO_AF_USART1); // USART1_RX
}
/**************************************************************************************/
void USART1_Configuration(void)
{
USART_InitTypeDef USART_InitStructure;
/* USARTx configuration ------------------------------------------------------*/
/* USARTx configured as follow:
- BaudRate = 9600 baud
- Word Length = 8 Bits
- One Stop Bit
- No parity
- Hardware flow control disabled (RTS and CTS signals)
- Receive and transmit enabled
*/
USART_InitStructure.USART_BaudRate = 9600;
USART_InitStructure.USART_WordLength = USART_WordLength_8b;
USART_InitStructure.USART_StopBits = USART_StopBits_1;
USART_InitStructure.USART_Parity = USART_Parity_No;
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
USART_Init(USART1, &USART_InitStructure);
USART_Cmd(USART1, ENABLE);
}
/**************************************************************************************/
int main(void)
{
RCC_Configuration();
GPIO_Configuration();
USART1_Configuration();
while(1)
{
while(USART_GetFlagStatus(USART1, USART_FLAG_TXE) == RESET); // Wait for Empty
USART_SendData(USART1, 0x49); // Send 'I'
}
while(1); // Don't want to exit
}