altos: Make stdio 8-bit clean by making pollchar return int

[fw/altos] / src / stm / ao_serial_stm.c

diff --git a/src/stm/ao_serial_stm.c b/src/stm/ao_serial_stm.c
index 00409f4a85957e16e53825f4e8420e85a168c535..94138edc3f4bda884a07555584e8d0d962ca99fa 100644 (file)
--- a/src/stm/ao_serial_stm.c
+++ b/src/stm/ao_serial_stm.c
@@ -17,13 +17,6 @@
 
 #include <ao.h>
 
-struct ao_stm_usart {
-       struct ao_fifo          rx_fifo;
-       struct ao_fifo          tx_fifo;
-       struct stm_usart        *reg;
-       uint8_t                 tx_started;
-};
-
 void
 ao_debug_out(char c)
 {
@@ -78,16 +71,19 @@ ao_usart_getchar(struct ao_stm_usart *usart)
        return c;
 }
 
-char
+int
 ao_usart_pollchar(struct ao_stm_usart *usart)
 {
-       char    c;
+       int     c;
        
        ao_arch_block_interrupts();
        if (ao_fifo_empty(usart->rx_fifo))
                c = AO_READ_AGAIN;
-       else
-               ao_fifo_remove(usart->rx_fifo,c);
+       else {
+               uint8_t u;
+               ao_fifo_remove(usart->rx_fifo,u);
+               c = u;
+       }
        ao_arch_release_interrupts();
        return c;
 }
@@ -201,7 +197,7 @@ ao_serial1_putchar(char c)
        ao_usart_putchar(&ao_stm_usart1, c);
 }
 
-char
+int
 ao_serial1_pollchar(void)
 {
        return ao_usart_pollchar(&ao_stm_usart1);
@@ -232,7 +228,7 @@ ao_serial2_putchar(char c)
        ao_usart_putchar(&ao_stm_usart2, c);
 }
 
-char
+int
 ao_serial2_pollchar(void)
 {
        return ao_usart_pollchar(&ao_stm_usart2);
@@ -263,7 +259,7 @@ ao_serial3_putchar(char c)
        ao_usart_putchar(&ao_stm_usart3, c);
 }
 
-char
+int
 ao_serial3_pollchar(void)
 {
        return ao_usart_pollchar(&ao_stm_usart3);