我有一个 SAM4s Xplained,想使用 UART1,但找不到示例或帮助。我自己尝试过,但它不起作用。
到目前为止,这是我的代码:
conf_uart.h
#include "asf.h" //uart.h etc. included here
#include <sam4s_xplained.h>
#define UART_SERIAL_BAUDRATE 9600
#define UART_SERIAL_CHANNEL_MODE UART_MR_CHMODE_AUTOMATIC //UART_MR_CHMODE_NORMAL
#define UART_SERIAL_MCK 240000000UL //CHIP_FREQ_CPU_MAX (tired both!)
#define UART_SERIAL_MODE UART_MR_PAR_NO
void uart_custom_init(void);
conf_uart.c
#include "conf_uart.h"
uint8_t received_byte;
void uart_custom_init(void) {
sysclk_init();
const sam_uart_opt_t uart_console_settings = {
UART_SERIAL_BAUDRATE,
UART_SERIAL_CHANNEL_MODE,
UART_SERIAL_MCK,
UART_SERIAL_MODE
};
uart_init(UART1,&uart_console_settings); //Init UART1
uart_enable_rx(UART1); //Enable RX (receiving)
uart_enable_tx(UART1); //Enable TX (transmitting)
uart_enable(UART1); //Enable UART1
uart_enable_interrupt(UART1,UART_IER_RXRDY); //Interrupt reading ready
NVIC_EnableIRQ(UART1_IRQn);
}
void UART1_Handler() {
uint32_t dw_status = uart_get_status(UART1);
if(dw_status & UART_SR_RXRDY) {
uint8_t received_byte;
uart_read(UART1, &received_byte);
uart_write(UART1, received_byte);
}
}
我尝试了不同的东西。例如,我激活了自动回声,但我的电脑上没有收到任何东西,我的 SAM4 也没有收到任何东西。
最佳答案
这是我的工作代码:
离线
conf_uart.h
#include "asf.h" //uart.h etc. included here
#define UART_SERIAL_BAUDRATE 9600
#define UART_SERIAL_CHANNEL_MODE UART_MR_CHMODE_NORMAL
#define UART_SERIAL_MODE UART_MR_PAR_NO
/* =============== UART1 =============== */ //(UART0 is defined but not UART1)
#define PINS_UART1 (PIO_PB2A_URXD1 | PIO_PB3A_UTXD1)
#define PINS_UART1_FLAGS (PIO_PERIPH_A | PIO_DEFAULT)
#define PINS_UART1_MASK (PIO_PB2A_URXD1 | PIO_PB3A_UTXD1)
#define PINS_UART1_PIO PIOB
#define PINS_UART1_ID ID_PIOB
#define PINS_UART1_TYPE PIO_PERIPH_A
#define PINS_UART1_ATTR PIO_DEFAULT
void uart_custom_init(void);
void sendViaUart(uint8_t data);
conf_uart.cpp
#include "conf_uart.h"
void uart_custom_init(void) {
sysclk_init();
// set the pins to use the uart peripheral
pio_configure(PINS_UART1_PIO, PINS_UART1_TYPE, PINS_UART1_MASK, PINS_UART1_ATTR);
//enable the uart peripherial clock
pmc_enable_periph_clk(ID_UART1);
const sam_uart_opt_t uart1_settings =
{ sysclk_get_cpu_hz(), UART_SERIAL_BAUDRATE, UART_SERIAL_MODE };
uart_init(UART1,&uart1_settings); //Init UART1 and enable Rx and Tx
uart_enable_interrupt(UART1,UART_IER_RXRDY); //Interrupt reading ready
NVIC_EnableIRQ(UART1_IRQn);
}
void sendViaUart(uint8_t data) {
while (!(UART1->UART_SR & UART_SR_TXRDY));
uart_write(UART1, data);
}
void UART1_Handler() {
uint32_t dw_status = uart_get_status(UART1);
if(dw_status & UART_SR_RXRDY) {
uint8_t received_byte;
uart_read(UART1, &received_byte);
sendViaUart(received_byte);
}
}
此致
狮子座
关于arm - Atmel SAM4S Xplained UART,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/14280053/