Bye Bye Timer!

[z.facultad/66.09/etherled.git] / pruebas / keil / red_test_anda / etherdev.c

diff --git a/pruebas/keil/red_test_anda/etherdev.c b/pruebas/keil/red_test_anda/etherdev.c
index aa8f35fe99781888348151f04afa2b2517dbe0fa..a4736293b9f9d86a48bbe532f4dff6d09e694c64 100644 (file)
--- a/pruebas/keil/red_test_anda/etherdev.c
+++ b/pruebas/keil/red_test_anda/etherdev.c
@@ -17,17 +17,6 @@ unsigned char uip_buf[80] =
 
 unsigned int uip_len = 14;
 
-#define ETH_CPU_CLOCK      ETH_CPU_XTAL / 12    // 8051 clock rate (X1 mode)
-
-// Delay routine timing parameters
-#define ETH_DELAY_CONST    9.114584e-5          // Delay routine constant
-#define ETH_DELAY_MULTPLR  (unsigned char)(ETH_DELAY_CONST * ETH_CPU_CLOCK)
-
-// X1 CPU mode timing parameters
-#define ETH_T0_CLOCK             ETH_CPU_XTAL / 12 // Timer 0 mode 1 clock rate
-#define ETH_T0_INT_RATE          24                // Timer 0 intrupt rate (Hz)
-#define ETH_T0_RELOAD            65536 - (ETH_T0_CLOCK / ETH_T0_INT_RATE)
-
 // Packet transmit & receive buffer configuration
 #define ETH_TX_PAGE_START  0x40    // 0x4000 Tx buffer is  6 * 256 = 1536 bytes
 #define ETH_RX_PAGE_START  0x46    // 0x4600 Rx buffer is 26 * 256 = 6656 bytes
@@ -36,13 +25,11 @@ unsigned int uip_len = 14;
 #define ETH_ADDR_PORT_MASK 0x1F                 // 00011111y
 #define ETH_DATA_PORT_MASK 0xFF                 // 11111111y
 
-#define ETH_MIN_PACKET_LEN 0x3C
+#define ETH_MIN_PACKET_LEN 0x3C                 // 60 bytes
 
 
 static void etherdev_reg_write(unsigned char reg, unsigned char wr_data);
 static unsigned char etherdev_reg_read(unsigned char reg);
-static void etherdev_delay_ms(unsigned int count);
-static unsigned int etherdev_poll(void);
 
 // Manipulate PS1 & PS0 in CR to select RTL8019AS register page. 
 #define ETHERDEV_SELECT_REG_PAGE(page)                                      \
@@ -52,8 +39,6 @@ static unsigned int etherdev_poll(void);
               etherdev_reg_write(CR, etherdev_reg_read(CR) | (page << 6));  \
           } while(0)
 
-static unsigned char tick_count = 0;
-
 
 static void etherdev_reg_write(unsigned char reg, unsigned char wr_data)
 {
@@ -101,27 +86,6 @@ static unsigned char etherdev_reg_read(unsigned char reg)
 } 
 
 
-/* 
-                                                                     
-                           etherdev_timer0_isr()                     
-                                                                     
- This function is invoked each 1/24th of a second and updates a      
- 1/24th of a second tick counter.                                    
-                                                                     
- */
-static void etherdev_timer0_isr(void) interrupt 1 using 1
-{
-    // Reload timer/ counter 0 for 24Hz periodic interrupt.   
-    TH0 = ETH_T0_RELOAD >> 8;
-    TL0 = ETH_T0_RELOAD;
-
-    // Increment 24ths of a second counter.
-    tick_count++;
-
-    return;
-}
-
-
 /*
                                                                      
                             etherdev_init()                          
@@ -219,29 +183,6 @@ bit etherdev_init(void)
     // Receive configuration register to accept broadcast packets.
     etherdev_reg_write(RCR, AB);
 
-
-    // Initialize Timer 0 to generate a periodic 24Hz interrupt. 
-
-    // Stop timer/ counter 0.                                         
-    TR0  = 0;          
-
-    // Set timer/ counter 0 as mode 1 16 bit timer.      
-    TMOD &= 0xF0;
-    TMOD |= 0x01;
-
-    // Preload for 24Hz periodic interrupt.    
-    TH0 = ETH_T0_RELOAD >> 8; 
-    TL0 = ETH_T0_RELOAD;
-
-    // Restart timer/ counter 0 running.
-    TR0 = 1;
-
-    // Enable timer/ counter 0 overflow interrupt.            
-    ET0 = 1;
-
-    // Enable global interrupt.
-    EA = 1;
-
     return 1;
 }
 
@@ -313,31 +254,6 @@ void etherdev_send(void)
 }
 
 
-/*
-                                                                     
-                           etherdev_read()                           
-                                                                     
- This function will read an entire IP packet into the uip_buf.       
- If it must wait for more than 0.5 seconds, it will return with      
- the return value 0. Otherwise, when a full packet has been read     
- into the uip_buf buffer, the length of the packet is returned.      
-                                                                     
- */
-unsigned int etherdev_read(void)
-{    
-    unsigned int bytes_read;
-
-    /* tick_count threshold should be 12 for 0.5 sec bail-out
-       One second (24) worked better for me, but socket recycling
-       is then slower. I set UIP_TIME_WAIT_TIMEOUT 60 in uipopt.h
-       to counter this. Retransmission timing etc. is affected also. */
-    while ((!(bytes_read = etherdev_poll())) && (tick_count < 12)) continue;
-
-    tick_count = 0;
-
-    return bytes_read;
-}
-
 static void etherdev_reset()
 {
     bit retransmit = etherdev_reg_read(CR) & TXP;
@@ -398,15 +314,9 @@ static void etherdev_reset()
     }
 }
 
-/*
-                                                                     
-                           etherdev_poll()                           
-                                                                     
- Poll the RTL8019AS ethernet device for an available packet.         
-                                                                     
- */
-static unsigned int etherdev_poll(void)
-{
+
+unsigned int etherdev_read(void)
+{    
     unsigned int len = 0;
 
     // Check if the rx buffer has overflowed.