Cambiata la putchar per kdebug per DSP56k: la nuova funzione e' quella piu' a basso...

[bertos.git] / drv / kdebug.c

diff --git a/drv/kdebug.c b/drv/kdebug.c
index 063df825415520e6fc83b916daed2aa5fe59a22e..54e5845b92b5687801f15b4039c00c5a399543ac 100755 (executable)
--- a/drv/kdebug.c
+++ b/drv/kdebug.c
@@ -16,6 +16,12 @@
 
 /*
  * $Log$
+ * Revision 1.10  2004/08/04 15:57:50  rasky
+ * Cambiata la putchar per kdebug per DSP56k: la nuova funzione e' quella piu' a basso livello (assembly)
+ *
+ * Revision 1.9  2004/08/02 20:20:29  aleph
+ * Merge from project_ks
+ *
  * Revision 1.8  2004/07/30 14:26:33  rasky
  * Semplificato l'output dell'ASSERT
  * Aggiunta ASSERT2 con stringa di help opzionalmente disattivabile
@@ -69,6 +75,19 @@
 #elif CPU_AVR
        #include <avr/io.h>
        #if CONFIG_KDEBUG_PORT == 0
+
+               /* External 485 transceiver on UART0 (to be overridden in "hw.h").  */
+               #if !defined(SER_UART0_485_INIT)
+                       #if defined(SER_UART0_485_RX) || defined(SER_UART0_485_TX)
+                               #error SER_UART0_485_INIT, SER_UART0_485_RX and SER_UART0_485_TX must be defined together
+                       #endif
+                       #define SER_UART0_485_INIT  do {} while (0)
+                       #define SER_UART0_485_TX    do {} while (0)
+                       #define SER_UART0_485_RX    do {} while (0)
+               #elif !defined(SER_UART0_485_RX) || !defined(SER_UART0_485_TX)
+                       #error SER_UART0_485_INIT, SER_UART0_485_RX and SER_UART0_485_TX must be defined together
+               #endif
+
                #if defined(__AVR_ATmega64__)
                        #define UCR UCSR0B
                        #define UDR UDR0
@@ -77,15 +96,63 @@
                        #define UCR UCSRB
                        #define USR UCSRA
                #endif
+
                #define KDBG_WAIT_READY()     do { loop_until_bit_is_set(USR, UDRE); } while(0)
-               #define KDBG_WRITE_CHAR(c)    do { UCR |= BV(TXEN); UDR = (c); } while(0)
-               #define KDBG_MASK_IRQ(old)    do { (old) = UCR & BV(TXCIE); cbi(UCR, TXCIE); } while(0)
-               #define KDBG_RESTORE_IRQ(old) do { UCR |= (old); } while(0)
+               #define KDBG_WAIT_TXDONE()    do { loop_until_bit_is_set(USR, TXC); } while(0)
+               /*
+                * BUG: before sending a new character the TXC flag is cleared to allow
+                * KDBG_WAIT_TXDONE() to work properly, but, if KDBG_WRITE_CHAR() is called
+                * after the RXC flag is set by hardware, a new TXC could be generated
+                * after we clear it and before the new character is put in UDR. In this
+                * case if a 485 is used the transceiver will be put in RX mode while
+                * transmitting the last char.
+                */
+               #define KDBG_WRITE_CHAR(c)    do { USR |= BV(TXC); UDR = (c); } while(0)
+
+               #define KDBG_MASK_IRQ(old)    do { \
+                       SER_UART0_485_TX; \
+                       (old) = UCR; \
+                       UCR |= BV(TXEN); \
+                       UCR &= ~(BV(TXCIE) | BV(UDRIE)); \
+               } while(0)
+
+               #define KDBG_RESTORE_IRQ(old) do { \
+                       KDBG_WAIT_TXDONE(); \
+                       SER_UART0_485_RX; \
+                       UCR = (old); \
+               } while(0)
+
        #elif CONFIG_KDEBUG_PORT == 1
+
+               /* External 485 transceiver on UART1 (to be overridden in "hw.h").  */
+               #ifndef SER_UART1_485_INIT
+                       #if defined(SER_UART1_485_RX) || defined(SER_UART1_485_TX)
+                               #error SER_UART1_485_INIT, SER_UART1_485_RX and SER_UART1_485_TX must be defined together
+                       #endif
+                       #define SER_UART1_485_INIT  do {} while (0)
+                       #define SER_UART1_485_TX    do {} while (0)
+                       #define SER_UART1_485_RX    do {} while (0)
+               #elif !defined(SER_UART1_485_RX) || !defined(SER_UART1_485_TX)
+                       #error SER_UART1_485_INIT, SER_UART1_485_RX and SER_UART1_485_TX must be defined together
+               #endif
+
                #define KDBG_WAIT_READY()     do { loop_until_bit_is_set(UCSR1A, UDRE); } while(0)
-               #define KDBG_WRITE_CHAR(c)    do { UCSR1B |= BV(TXEN); UDR1 = (c); } while(0)
-               #define KDBG_MASK_IRQ(old)    do { (old) = UCSR1B & BV(TXCIE); cbi(UCSR1B, TXCIE); } while(0)
-               #define KDBG_RESTORE_IRQ(old) do { UCSR1B |= (old); } while(0)
+               #define KDBG_WAIT_TXDONE()    do { loop_until_bit_is_set(UCSR1A, TXC); } while(0)
+               #define KDBG_WRITE_CHAR(c)    do { UCSR1A |= BV(TXC); UDR1 = (c); } while(0)
+
+               #define KDBG_MASK_IRQ(old)    do { \
+                       SER_UART1_485_TX; \
+                       (old) = UCSR1B; \
+                       UCSR1B |= BV(TXEN); \
+                       UCSR1B &= ~(BV(TXCIE) | BV(UDRIE)); \
+               } while(0)
+
+               #define KDBG_RESTORE_IRQ(old) do { \
+                       KDBG_WAIT_TXDONE(); \
+                       SER_UART1_485_RX; \
+                       UCSR1B = (old); \
+               } while(0)
+
        #else
                #error CONFIG_KDEBUG_PORT should be either 0 or 1
        #endif
@@ -94,7 +161,7 @@
           implements the console I/O correctly. */
        #include <stdio.h>
        #define KDBG_WAIT_READY()
-       #define KDBG_WRITE_CHAR(c)        do { char ch=c; fwrite(&ch,1,1,stdout); } while (0)
+       #define KDBG_WRITE_CHAR(c)        __put_char(c, stdout)
        #define KDBG_MASK_IRQ(old)
        #define KDBG_RESTORE_IRQ(old)
 #else
@@ -123,9 +190,11 @@ void kdbg_init(void)
                #if CONFIG_KDEBUG_PORT == 0
                        UBRR0H = (uint8_t)(period>>8);
                        UBRR0L = (uint8_t)period;
+                       SER_UART0_485_INIT;
                #elif CONFIG_KDEBUG_PORT == 1
                        UBRR1H = (uint8_t)(period>>8);
                        UBRR1L = (uint8_t)period;
+                       SER_UART1_485_INIT;
                #else
                        #error CONFIG_KDEBUG_PORT must be either 0 or 1
                #endif
@@ -134,6 +203,7 @@ void kdbg_init(void)
                UBRRL = (uint8_t)period;
        #elif defined(__AVR_ATmega103__)
                UBRR = (uint8_t)period;
+               SER_UART0_485_INIT;
        #else
                #error Unknown arch
        #endif