feat add RS485 using usart4 for edu_arm32 board and fix test_rs485 error

2023-08-17 15:04:48 +08:00
parent d73470de3c
commit 7077cf74c2
5 changed files with 211 additions and 29 deletions
--- a/APP_Framework/Framework/control/shared/control_io.c
+++ b/APP_Framework/Framework/control/shared/control_io.c
@@ -180,7 +180,7 @@ int SerialRead(uint8_t *read_data, int length)
    int data_recv_size = 0;

    while (data_size < length) {
-        data_recv_size = PrivRead(uart_fd, read_data + data_recv_size, length);
+        data_recv_size = PrivRead(uart_fd, read_data + data_size, length - data_size);
        data_size += data_recv_size;
    }