Posted on March 31, 2016 at 11:00Hi. I'm trying to get what I've sent from UART4 port GPIOC10 (TX) GPIOC11 (RX). But every time I can't get what I've sent. For example I'm sending 0x10, reading 0x90.
Port settings; Baud = 9600kbps, 8-bit, Even Parity, 1 Stop bit, No hardware flow control
Initializing port with;
void serial_init(void)
{
GPIO_InitTypeDef g;
USART_InitTypeDef u;
// GPIOA clk aktif
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOC, ENABLE);
// UART4 clk aktif
RCC_APB1PeriphClockCmd(RCC_APB1Periph_UART4, ENABLE);
g.GPIO_Mode = GPIO_Mode_AF;
g.GPIO_OType = GPIO_OType_PP;
g.GPIO_PuPd = GPIO_PuPd_UP;
g.GPIO_Speed = GPIO_Speed_50MHz;
g.GPIO_Pin = GPIO_Pin_10 | GPIO_Pin_11;
GPIO_PinAFConfig(GPIOC, GPIO_PinSource10, GPIO_AF_UART4);
GPIO_PinAFConfig(GPIOC, GPIO_PinSource11, GPIO_AF_UART4);
GPIO_Init(GPIOC, &g);
u.USART_BaudRate = 9600;
u.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
u.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
u.USART_WordLength = USART_WordLength_8b;
u.USART_Parity = USART_Parity_Even;
u.USART_StopBits = USART_StopBits_1;
USART_Init(UART4, &u);
USART_ClearFlag(UART4, USART_FLAG_LBD | USART_FLAG_TC | USART_FLAG_RXNE);
USART_ClearITPendingBit(UART4, USART_IT_ERR | USART_IT_FE | USART_IT_IDLE | \
USART_IT_LBD | USART_IT_NE | USART_IT_ORE | \
USART_IT_ORE_ER | USART_IT_ORE_RX | \
USART_IT_PE | USART_IT_RXNE | USART_IT_TC | \
USART_IT_TXE);
USART_Cmd(UART4, ENABLE);
}
and testing it with;
void test_serial(void)
{
//int i;
USART_SendData(UART4, (uint16_t)0x10);
while (USART_GetFlagStatus(UART4, USART_FLAG_TC) != SET);
USART_ClearFlag(UART4, USART_FLAG_TC);
//for (i = 0; i < 1000; ++i);
while (USART_GetFlagStatus(UART4, USART_FLAG_RXNE) != SET);
if ((uint8_t)USART_ReceiveData(UART4) == (uint8_t)0x10)
{
continue;
}
}
I've added for test the //int i; and the //for... lines. Program doesn't reach the continue line.
