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-rw-r--r--platforms/avr/drivers/uart.c26
-rw-r--r--platforms/avr/drivers/uart.h8
2 files changed, 25 insertions, 9 deletions
diff --git a/platforms/avr/drivers/uart.c b/platforms/avr/drivers/uart.c
index c6abcb6fe0..01cf6b1fb8 100644
--- a/platforms/avr/drivers/uart.c
+++ b/platforms/avr/drivers/uart.c
@@ -100,7 +100,7 @@ void uart_init(uint32_t baud) {
}
// Transmit a byte
-void uart_putchar(uint8_t c) {
+void uart_write(uint8_t data) {
uint8_t i;
i = tx_buffer_head + 1;
@@ -110,27 +110,39 @@ void uart_putchar(uint8_t c) {
while (tx_buffer_tail == i)
; // wait until space in buffer
// cli();
- tx_buffer[i] = c;
+ tx_buffer[i] = data;
tx_buffer_head = i;
UCSRnB = (1 << RXENn) | (1 << TXENn) | (1 << RXCIEn) | (1 << UDRIEn);
// sei();
}
// Receive a byte
-uint8_t uart_getchar(void) {
- uint8_t c, i;
+uint8_t uart_read(void) {
+ uint8_t data, i;
while (rx_buffer_head == rx_buffer_tail)
; // wait for character
i = rx_buffer_tail + 1;
if (i >= RX_BUFFER_SIZE) i = 0;
- c = rx_buffer[i];
+ data = rx_buffer[i];
rx_buffer_tail = i;
- return c;
+ return data;
+}
+
+void uart_transmit(const uint8_t *data, uint16_t length) {
+ for (uint16_t i = 0; i < length; i++) {
+ uart_write(data[i]);
+ }
+}
+
+void uart_receive(uint8_t *data, uint16_t length) {
+ for (uint16_t i = 0; i < length; i++) {
+ data[i] = uart_read();
+ }
}
// Return whether the number of bytes waiting in the receive buffer is nonzero.
-// Call this before uart_getchar() to check if it will need
+// Call this before uart_read() to check if it will need
// to wait for a byte to arrive.
bool uart_available(void) {
uint8_t head, tail;
diff --git a/platforms/avr/drivers/uart.h b/platforms/avr/drivers/uart.h
index 602eb3d8b0..9cb7652b08 100644
--- a/platforms/avr/drivers/uart.h
+++ b/platforms/avr/drivers/uart.h
@@ -28,8 +28,12 @@
void uart_init(uint32_t baud);
-void uart_putchar(uint8_t c);
+void uart_write(uint8_t data);
-uint8_t uart_getchar(void);
+uint8_t uart_read(void);
+
+void uart_transmit(const char *data, uint16_t length);
+
+void uart_receive(char *data, uint16_t length);
bool uart_available(void);