TM4C123G串口
时间: 2023-09-11 12:03:04 浏览: 122
回答: TM4C123G芯片有多个串口可供使用。根据引用\[1\]和引用\[3\]的内容,可以使用UARTStdioConfig函数来配置串口0,以便使用UARTprintf函数进行数据打印。而使用UARTCharPut函数则需要使用UARTConfigSetExpClk函数进行配置。此外,根据引用\[2\]的内容,还可以使用GPIOPinConfigure和GPIOPinTypeUART函数来实现TM4C123G的IO口功能复用。
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- *1* *2* *3* [tm4c123gxl库函数调包侠养成(六)-------串口接收中断(中断配置详解)](https://blog.csdn.net/qq_43725844/article/details/105996042)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v91^insertT0,239^v3^insert_chatgpt"}} ] [.reference_item]
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相关问题
tm4c 123g串口通信
TM4C123G是德州仪器(Texas Instruments)推出的一款高性能的微控制器,它具有丰富的外设和高性能的处理能力。串口通信是一种常见的通信方式,可以使TM4C123G与其他设备进行数据传输和通信。
TM4C123G具有多个UART(通用异步收发器)外设,可以通过这些UART口进行串口通信。每个UART口包括收发数据线、时钟线等接口,可通过配置寄存器设置通信速率、数据位数、校验位、停止位等参数。
首先,需要初始化串口通信,设置串口的工作模式和参数。可以通过编程的方式设置相应的寄存器来配置UART口。比如,需要设置通信速率为115200,数据位为8位,无校验位,1个停止位。设置完毕后,可以通过读写相应的寄存器来进行数据的发送和接收。
发送数据时,将要发送的数据写入到发送寄存器中,串口会根据配置的参数将数据发送出去,可通过查询或中断的方式判断数据是否发送成功。接收数据时,通过读取接收寄存器可以获取到接收到的数据,同样可以通过查询或中断的方式来判断是否接收到数据。
在通信过程中,还需要考虑到数据的传输准确性和稳定性。可以通过使用校验位来验证数据的正确性,以保证数据的完整性。另外,需要注意串口通信的时序问题,比如发送方和接收方的时钟频率要一致,并且发送和接收的时机要正确。
总之,TM4C123G可以通过配置UART口来进行串口通信,通过设置相应的寄存器来配置通信参数,通过读写寄存器来进行数据的发送和接收。在实际应用中,可以根据具体需求进行接口的配置和数据的处理。
tm4c123g串口通信FIFO
### TM4C123G UART FIFO Configuration and Usage
For the TM4C123G microcontroller, configuring the UART with a FIFO (First In First Out) buffer enhances performance by allowing more efficient data handling during serial communication. The UART module supports both transmit and receive FIFOs that can be configured to improve throughput.
The UART FIFO mode must first be enabled using the `UARTLCRH` register which controls line characteristics including enabling or disabling the FIFO operation. Setting bit 4 (`FEN`) of this register enables the FIFO buffers[^1].
When FIFO is enabled, additional control over how these buffers operate comes from setting thresholds within the same `UARTLCRH` register for triggering interrupts at specific levels of fill in either direction:
- Bits 6–5 define the Receive Trigger Level.
- Bit 7 defines whether only full frames trigger an interrupt on reception.
Here’s an example code snippet demonstrating initialization settings for UART0 on the TM4C123GH6PM device where FIFO operations are set up along with other necessary configurations like baud rate setup through `UARTIBRD`, `UARTFBRD`, and character format via `UARTLCRH`.
```c
#include "tm4c123gh6pm.h"
void UART_Init(void){
// Enable clock to PORTA and UART0 modules
SYSCTL_RCGCUART_R |= SYSCTL_RCGCUART_R0;
SYSCTL_RCGCGPIO_R |= SYSCTL_RCGCGPIO_R0;
// Configure PA0 as UART0 TX and PA1 as UART0 RX pins
GPIO_PORTA_AFSEL_R |= 0x03; // Select alternate function on PA0 & PA1
GPIO_PORTA_PCTL_R = (GPIO_PORTA_PCTL_R&~0xFFFFFFFF)|(GPIO_PCTL_PA1_U0RX|GPIO_PCTL_PA0_U0TX);
GPIO_PORTA_DEN_R |= 0x03; // Digital enable on PA0 & PA1
// Set Baud Rate to 9600 bps
UART0_IBRD_R = 104; // Integer part of BRD calculation @80MHz
UART0_FBRD_R = 11; // Fractional part of BRD calculation @80MHz
// Line Control Register: 8-bit word length, no parity bits, one stop bit, FIFO Enabled
UART0_LCRH_R = (UART_LCRH_WLEN_8 | UART_LCRH_FEN);
// Enable UART0 Module
UART0_CTL_R |= UART_CTL_UARTEN;
}
```
This configuration ensures reliable transmission and receipt of data packets while minimizing CPU intervention due to frequent polling requirements when not utilizing hardware flow control mechanisms provided by such buffering schemes.
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