chap07 UART Serial Comm

UART/USART
Universal Synchronous/Asynchronous
Receiver Transmitter

USART:
A B
E/R E/R
Tx
Tx
Rx
Rx
GND
A B
E/R E/R
Tx
Tx
Rx
Rx
GND
Synchronous Clock
Asynchronous
STM32F1: USART1, USART2, USART3, UART4, UART5, USART6

Data
(N bits)
1Start
bit
Parity
Bit
Stop
bit
Frame Frame
Frame Frame
idle idle idle
7, 8, 9 bits
0.5, 1, 1.5 , 2 bits
No Parity
Odd
Even
UART: Asynchronous communication

UART: compatible modules
TX
RX
Bluetooth
Zigbee
Wifi
GPS

UART: Peripheral Architecture
Data
Registers
CR2
CR1
Baud Rate
Register
Status Register
UE
typedef
struct
uint32_t SR;
//status Register
uint32_t DR;
//Data Register
uint32_t BRR;
//Baud rate Register
uint32_t CR1;
// Config Register
uint32_t CR2;
USART_TypeDef
;