ST STM32L0x3 User Manual

RM0367 Rev 7 1017/1043
RM0367 Code examples
1020
USART1->CR1 |= USART_CR1_TCIE;/* enable TC interrupt */
A.17.8 USART single-wire half-duplex code example
/* (1) oversampling by 16, 9600 baud */
/* (2) Single-wire half-duplex mode */
/* (3) 8 data bit, 1 start bit, 1 stop bit, no parity, reception and
transmission enabled */
USART1->BRR = 160000 / 96; /* (1) */
USART1->CR3 = USART_CR3_HDSEL; /* (2) */
USART1->CR1 = USART_CR1_TE | USART_CR1_RXNEIE | USART_CR1_RE |
USART_CR1_UE; /* (3) */
while((USART1->ISR & USART_ISR_TC) != USART_ISR_TC)/* polling idle frame
Transmission */
{
/* add time out here for a robust application */
}
USART1->ICR = USART_ICR_TCCF;/* Clear TC flag */
USART1->CR1 |= USART_CR1_TCIE;/* Enable TC interrupt */
A.17.9 USART smartcard mode code example
/* (1) oversampling by 16, 9600 baud */
/* (2) Clock divided by 16 = 1MHz */
/* (3) Samrt card mode enable */
/* (4) 1.5 stop bits, clock enable */
/* (5) 8-data bit plus parity, 1 start bit */
USART1->BRR = 160000 / 96; /* (1) */
USART1->GTPR = 16 >> 1; /* (2) */
USART1->CR3 = USART_CR3_SCEN; /* (3) */
USART1->CR2 = USART_CR2_STOP_1 | USART_CR2_STOP_0 | USART_CR2_CLKEN;/*(4 */
USART1->CR1 = USART_CR1_M | USART_CR1_PCE | USART_CR1_TE |
USART_CR1_UE;/* (5) */
/* Polling idle frame transmission transfer complete (this frame is not
sent) */
while((USART1->ISR & USART_ISR_TC) != USART_ISR_TC)
{
/* add time out here for a robust application */
}
USART1->ICR = USART_ICR_TCCF;/* clear TC flag */
USART1->CR1 |= USART_CR1_TCIE;/* enable TC interrupt */
A.17.10 USART IrDA mode code example
/* (1) oversampling by 16, 9600 baud */
/* (2) Divide by 24 to achieve the low power frequency */
/* (3) Enable IrDA */
/* (4) 8 data bit, 1 start bit, 1 stop bit, no parity */

ST STM32L0x3 Specifications

General

Brand	ST
Model	STM32L0x3
Category	Microcontrollers
Language	English