add led pwm

avr/usbload/Makefile

@@ -33,13 +33,13 @@ ifeq ($(DEBUG),1)
     OBJECTS = usbdrv/usbdrv.o usbdrv/usbdrvasm.o usbdrv/oddebug.o \
                main.o usb_bulk.o uart.o fifo.o sram.o crc.o debug.o \
                dump.o timer.o watchdog.o rle.c loader.o info.o shared_memory.o \
-               irq.o command.o testing.o
+               pwm.o irq.o command.o testing.o
 else 
     LDFLAGS =-Wl,-u
     CFLAGS  =-Iusbdrv -I. -DDEBUG_LEVEL=0 -DNO_DEBUG -DNO_INFO
     OBJECTS = usbdrv/usbdrv.o usbdrv/usbdrvasm.o usbdrv/oddebug.o  main.o usb_bulk.o \
               uart.o fifo.o sram.o crc.o debug.o dump.o timer.o watchdog.o rle.c loader.o \
-              info.o shared_memory.o command.o irq.o
+              pwm.o info.o shared_memory.o command.o irq.o
 endif
 
 COMPILE = avr-gcc -Wall -Os -DF_CPU=$(F_CPU) $(CFLAGS) -mmcu=$(DEVICE)

avr/usbload/main.c

@@ -45,6 +45,7 @@
 #include "command.h"
 #include "shared_memory.h"
 #include "irq.h"
+#include "pwm.h"
 #include "testing.h"
 
 
@@ -199,6 +200,8 @@ usbMsgLen_t usbFunctionSetup(uchar data[8])
         req_state = REQ_STATUS_SNES;
         debug_P(DEBUG_USB, PSTR("USB_MODE_SNES:\n"));
         ret_len = 0;
+        pwm_stop();
+        
         /*
          * -------------------------------------------------------------------------
          */
@@ -332,6 +335,7 @@ int main(void)
     banner();
     
     system_init();
+    //pwm_init();
     shared_memory_init();
     snes_reset_hi();
     snes_reset_off();
@@ -339,6 +343,7 @@ int main(void)
     boot_startup_rom(500);
     
     globals_init();
+    
     usbInit();
     usb_connect();
     

avr/usbload/pwm.c

@@ -0,0 +1,93 @@
+/*
+ * =====================================================================================
+ *
+ * ________        .__        __    ________               ____  ________
+ * \_____  \  __ __|__| ____ |  | __\______ \   _______  _/_   |/  _____/
+ *  /  / \  \|  |  \  |/ ___\|  |/ / |    |  \_/ __ \  \/ /|   /   __  \
+ * /   \_/.  \  |  /  \  \___|    <  |    `   \  ___/\   / |   \  |__\  \
+ * \_____\ \_/____/|__|\___  >__|_ \/_______  /\___  >\_/  |___|\_____  /
+ *        \__>             \/     \/        \/     \/                 \/
+ *
+ *                                  www.optixx.org
+ *
+ *
+ *        Version:  1.0
+ *        Created:  07/21/2009 03:32:16 PM
+ *         Author:  david@optixx.org
+ *
+ * =====================================================================================
+ */
+#include <stdint.h>
+#include <string.h>
+#include <avr/io.h>
+#include <avr/interrupt.h>
+
+#include "pwm.h"
+#include "debug.h"
+#include "info.h"
+#include "sram.h"
+
+
+#define PWM_SINE_MAX 255
+uint8_t pwm_sine_table[] = {
+0x7f,0x82,0x85,0x88,0x8b,0x8e,0x91,0x94,0x97,0x9b,0x9e,0xa1,0xa4,0xa7,0xaa,0xad,
+0xaf,0xb2,0xb5,0xb8,0xbb,0xbe,0xc0,0xc3,0xc6,0xc8,0xcb,0xcd,0xd0,0xd2,0xd4,0xd7,
+0xd9,0xdb,0xdd,0xdf,0xe1,0xe3,0xe5,0xe7,0xe9,0xea,0xec,0xee,0xef,0xf0,0xf2,0xf3,
+0xf4,0xf5,0xf6,0xf7,0xf8,0xf9,0xfa,0xfb,0xfb,0xfc,0xfc,0xfd,0xfd,0xfd,0xfd,0xfd,
+0xfd,0xfd,0xfd,0xfd,0xfd,0xfc,0xfc,0xfb,0xfb,0xfa,0xf9,0xf8,0xf7,0xf6,0xf5,0xf4,
+0xf3,0xf2,0xf0,0xef,0xee,0xec,0xea,0xe9,0xe7,0xe5,0xe3,0xe1,0xdf,0xdd,0xdb,0xd9,
+0xd7,0xd4,0xd2,0xd0,0xcd,0xcb,0xc8,0xc6,0xc3,0xc0,0xbe,0xbb,0xb8,0xb5,0xb2,0xaf,
+0xad,0xaa,0xa7,0xa4,0xa1,0x9e,0x9b,0x97,0x94,0x91,0x8e,0x8b,0x88,0x85,0x82,0x7f,
+0x7c,0x79,0x76,0x73,0x70,0x6d,0x6a,0x67,0x63,0x60,0x5d,0x5a,0x57,0x54,0x51,0x4f,
+0x4c,0x49,0x46,0x43,0x40,0x3e,0x3b,0x38,0x36,0x33,0x31,0x2e,0x2c,0x2a,0x27,0x25,
+0x23,0x21,0x1f,0x1d,0x1b,0x19,0x17,0x15,0x14,0x12,0x10,0x0f,0x0e,0x0c,0x0b,0x0a,
+0x09,0x08,0x07,0x06,0x05,0x04,0x03,0x03,0x02,0x02,0x01,0x01,0x01,0x01,0x01,0x01,
+0x01,0x01,0x01,0x01,0x02,0x02,0x03,0x03,0x04,0x05,0x06,0x07,0x08,0x09,0x0a,0x0b,
+0x0c,0x0e,0x0f,0x10,0x12,0x14,0x15,0x17,0x19,0x1b,0x1d,0x1f,0x21,0x23,0x25,0x27,
+0x2a,0x2c,0x2e,0x31,0x33,0x36,0x38,0x3b,0x3e,0x40,0x43,0x46,0x49,0x4c,0x4f,0x51,
+0x54,0x57,0x5a,0x5d,0x60,0x63,0x67,0x6a,0x6d,0x70,0x73,0x76,0x79,0x7c,0x7f
+};
+
+ volatile uint8_t pwm_setting;                    // Einstellungen für die einzelnen PWM-Kanäle
+ volatile uint8_t pwm_overflow;                    // Einstellungen für die einzelnen PWM-Kanäle
+ volatile uint8_t pwm_idx;                    // Einstellungen für die einzelnen PWM-Kanäle
+ 
+ ISR(TIMER2_COMPA_vect) {
+    static uint8_t pwm_cnt=0;
+    OCR2A += (uint16_t)T_PWM;
+        
+    if (pwm_setting> pwm_cnt) 
+        led_pwm_on();
+    else
+        led_pwm_off();
+    
+    if (pwm_cnt==(uint8_t)(PWM_STEPS-1))
+        pwm_cnt=0;
+    else
+        pwm_cnt++;
+    if (!pwm_overflow++){
+        pwm_setting = pwm_sine_table[pwm_idx++];
+        if (PWM_SINE_MAX == pwm_idx)
+            pwm_idx = 0;
+    }
+}
+
+void pwm_set(uint8_t val) {
+    pwm_setting = val;
+}
+
+void pwm_stop(void) {
+    while(pwm_setting!=0xfd);
+    //cli();
+    TIMSK2 = 0;
+    //sei();       
+}
+
+void pwm_init(void) {
+    pwm_setting = 0x7f;
+    pwm_overflow = 0;
+    //cli();
+    TCCR2B = 1;         
+    TIMSK2 |= (1<<OCIE2A);       
+    //sei();                  
+}

avr/usbload/pwm.h

@@ -0,0 +1,37 @@
+/*
+ * =====================================================================================
+ *
+ * ________        .__        __    ________               ____  ________
+ * \_____  \  __ __|__| ____ |  | __\______ \   _______  _/_   |/  _____/
+ *  /  / \  \|  |  \  |/ ___\|  |/ / |    |  \_/ __ \  \/ /|   /   __  \
+ * /   \_/.  \  |  /  \  \___|    <  |    `   \  ___/\   / |   \  |__\  \
+ * \_____\ \_/____/|__|\___  >__|_ \/_______  /\___  >\_/  |___|\_____  /
+ *        \__>             \/     \/        \/     \/                 \/
+ *
+ *                                  www.optixx.org
+ *
+ *
+ *        Version:  1.0
+ *        Created:  07/21/2009 03:32:16 PM
+ *         Author:  david@optixx.org
+ *
+ * =====================================================================================
+ */
+
+#ifndef __PWM_H__
+#define __PWM_H__
+
+#define F_PWM 100                       // PWM-Frequenz in Hz
+#define PWM_STEPS 256                   // PWM-Schritte pro Zyklus(1..256)
+ 
+#define T_PWM (F_CPU/(F_PWM*PWM_STEPS)) // Systemtakte pro PWM-Takt
+ 
+#if (T_PWM<(93+5))
+    #error T_PWM zu klein, F_CPU muss vergrösst werden oder F_PWM oder PWM_STEPS verkleinert werden
+#endif
+
+ void pwm_init(void);
+void pwm_stop(void);
+ 
+ 
+#endif

avr/usbload/sram.h

@@ -137,6 +137,8 @@
 #define led_off()	            ((LED_PORT &=~ (1 << LED_PIN)),\
                                 (LED_DIR |= (1 << LED_PIN)))
 
+#define led_pwm_on()	        (LED_DIR &=~ (1 << LED_PIN))
+#define led_pwm_off()	        (LED_DIR |= (1 << LED_PIN))
 
 /* ---------------------------- PORT D ---------------------------- */