使用 PIO 串口（还未测试）

main.h

@@ -14,15 +14,25 @@
 #include "hardware/pwm.h"
 #include "hardware/adc.h"
 
+#include "hardware/pio.h"
+
 #define UART0 uart0
 #define BAUD_RATE 4800
 #define DATA_BITS 8
 #define STOP_BITS 1
 #define PARITY UART_PARITY_NONE
-
 #define UART0_TX_PIN 1
 #define UART0_RX_PIN 0
 
+#include "uart_tx.pio.h"
+#include "uart_rx.pio.h"
+#define IM1253B_PIO pio0
+#define IM1253B_PIO_TX_PIN 19			// 接 IM1253B (TX) PIN
+#define IM1253B_PIO_RX_PIN 20			// 接 IM1253B (RX) PIN
+#define IM1253B_PIO_SM_TX 0
+#define IM1253B_PIO_SM_RX 1
+#define IM1253B_PIO_SERIAL_BAUD 4800
+
 int Read_ID = 0x01;
 unsigned char Tx_Buffer[8];
 unsigned char Rx_Buffer[40];