stm32f107vc usart

[michaelscott2509]

Posted on January 23, 2012 at 17:49

Hi,

I am trying to get the usart to work on the olimex stm32-p107 board. I setup the GPIO ports and USART, but cannot seem to send, or receive any data. Has anyone has this problem? or any ideas? 

Here is my code: RCC_APB2PeriphClockCmd( RCC_APB2Periph_GPIOB, ENABLE ); /* Enable USART3 clock */ RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART3, ENABLE); /* Configure USART Tx as alternate function push-pull */ GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; GPIO_Init(GPIOB, &GPIO_InitStructure); /* Configure USART Rx as input floating */ GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; GPIO_Init(GPIOB, &GPIO_InitStructure); /* Remap USART, as USART3 is used as alternate pins */ //GPIO_PinRemapConfig(GPIO_FullRemap_USART3, ENABLE); /* Configure USART 9600 8N1 */ USART_DeInit(USART3); 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_Tx;// | USART_Mode_Rx; USART_InitStructure.USART_Clock = USART_Clock_Enable; USART_InitStructure.USART_CPOL = USART_CPOL_Low; USART_InitStructure.USART_CPHA = USART_CPHA_1Edge; USART_InitStructure.USART_LastBit = USART_LastBit_Enable; USART_Init(USART3, &USART_InitStructure); /* Enable USART3 */   USART_Cmd(USART3, ENABLE); /* Send some test data */ while (USART_GetFlagStatus(USART3, USART_FLAG_TXE) == RESET);   USART_SendData(USART3, (u8) 'T'); while (USART_GetFlagStatus(USART3, USART_FLAG_TXE) == RESET); USART_SendData(USART3, (u8) 'e'); while (USART_GetFlagStatus(USART3, USART_FLAG_TXE) == RESET); USART_SendData(USART3, (u8) 's'); while (USART_GetFlagStatus(USART3, USART_FLAG_TXE) == RESET); USART_SendData(USART3, (u8) 't'); #stm32f107-usart

[Tesla DeLorean]

Posted on January 24, 2012 at 22:17

I really don't know how you're compiling this, or getting it on the board, and I don't have one of these specific boards.

I believe the code as presented should work, as incomplete as it is, if it is pasted in a suitable framework. You could add some code to toggle a GPIO or LED, and send data in a continuously loop. Stick a scope on the board and confirm if you can observe any signals. Make sure your IDE, or whatever, is downloading code to the board, some IDE's default to a ''simulation'' without copying it to the hardware. Blinking an LED on the hardware would give a clear indication of working code. I don't use Minicom, but RealTerm would work with 9600 8N1 with no flow control.