Posted on September 28, 2012 at 14:13Hi! I'm working with a STM32F0-Discovery board + IAR IDE
After loading this code
...
void USART_Configuration(void)
{
/* Abilita clock GPIOA e DMA */
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA , ENABLE);
/* Abilita clock USART2 APB */
RCC_APB2PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE);
/* configurazione pin USART2 **************************************************/
// GPIO_DeInit(GPIOA);
/* Connette i pin PA14 e PA15 alla periferica USATR */
GPIO_PinAFConfig(GPIOA, GPIO_PinSource14, GPIO_AF_1);
GPIO_PinAFConfig(GPIOA, GPIO_PinSource15, GPIO_AF_1);
/* Configura i pin come AF pushpull */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_14 | GPIO_Pin_15 ;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_Level_2;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
GPIO_Init(GPIOA, &GPIO_InitStructure);
/* Configurazione USART2:
- BaudRate = 115200 baud
- Word Length = 8 Bits
- Stop Bit = 1 Stop Bit
- Parity = No Parity
- Hardware flow control disabled (RTS and CTS signals)
- Receive and transmit enabled
*/
USART_DeInit(USART2);
USART_InitStructure.USART_BaudRate = 115200;
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(USART2, &USART_InitStructure);
USART_Cmd(USART2, ENABLE);
}
...
the board works wrong, because i can't program anymore the board.
when i try a programming/bebugging session, i receive the seguent message
''Fatal error: ST LINK, No MCU device found.''
It' possible to restore the board?
#usart2-/-boot-problem
