From 9f1a71389dff6cddd11c4b9975a0d1b91806ee2d Mon Sep 17 00:00:00 2001
From: hackbard <hackbard@hackdaworld.org>
Date: Mon, 24 Sep 2007 21:48:48 +0200
Subject: [PATCH] some interrupt/pwm testing

---
 betty/Makefile     |  2 +-
 betty/betty.c      | 33 ++++++++++++++++++++++++++++++++-
 betty/betty.h      |  4 ++++
 betty/interrupts.c | 26 +++-----------------------
 betty/interrupts.h |  5 +++++
 betty/system.c     |  3 ++-
 6 files changed, 47 insertions(+), 26 deletions(-)

diff --git a/betty/Makefile b/betty/Makefile
index 4d2a1aa..a76cf32 100644
--- a/betty/Makefile
+++ b/betty/Makefile
@@ -20,7 +20,7 @@ CROSS_TARGET = fwbc.hex fwflash.hex betty.hex
 
 # betty deps
 BETTY_DEPS = system.o uart.o buttons.o spi.o display.o flash.o functions.o
-BETTY_DEPS += interrupts.o #pffs.o
+BETTY_DEPS += interrupts.o pwm.o #pffs.o
 
 # all projects
 all: $(HOST_TARGET) $(CROSS_TARGET)
diff --git a/betty/betty.c b/betty/betty.c
index bac6614..3b29d2e 100644
--- a/betty/betty.c
+++ b/betty/betty.c
@@ -17,6 +17,7 @@ const char d1_txt[]="betty";
 const char d2_txt[]="- alphablend -";
 u8 contrast;
 t_button button;
+int sample_count;
 
 /*
  * functions
@@ -37,6 +38,16 @@ void display_string_page(u8 x,u8 p,u8 *s,u8 f,u8 o,u8 sp) {
 	}
 }
 
+void __attribute__ ((interrupt("IRQ"))) set_sample(void) {
+
+	uart0_send_byte('S');
+	pwm_update_match(PWM_CHAN2,PWM_SINGLE_EDGE,sinus[sample_count++],0);
+	if(sample_count==0xff)
+		sample_count=0;
+	interrupt_ack();
+	interrupt_tc_ir_set(INTERRUPT_TC0,INTERRUPT_M0);
+}
+
 void __attribute__ ((interrupt("IRQ"))) input_event(void) {
 
 	u8 noret,tries;
@@ -135,6 +146,9 @@ int main() {
 
 	/* variables */
 
+	/* init */
+	sample_count=0;
+
 	/* system init */
 	pll_init();
 	pin_init();
@@ -166,12 +180,29 @@ int main() {
 
 	/* interrupt init */
 	interrupt_init();
+
+	// ext interrupt
 	interrupt_ext_ir_config(INTERRUPT_EXT3,INTERRUPT_EXT_NOWAKE,
 	                        INTERRUPT_EXT_MODE_EDGE,
 	                        INTERRUPT_EXT_POLAR_LOW);
 	interrupt_ext_ir_set(INTERRUPT_EXT3);
 	interrupt_enable(INTERRUPT_EINT3,INTERRUPT_MODE_VIRQ,
-	                 0,(u32)input_event);
+	                 0,(u32)&input_event);
+
+	// timer interrupt
+	interrupt_tc_config(INTERRUPT_TC0,INTERRUPT_TC_MODE_T,0,0);
+	interrupt_tc_match_config(INTERRUPT_TC0,INTERRUPT_M0,120,
+	                          INTERRUPT_TC_MATCH_IR|INTERRUPT_TC_MATCH_RESET);
+	interrupt_tc_ir_set(INTERRUPT_TC0,INTERRUPT_M0);
+	interrupt_enable(INTERRUPT_PWM,INTERRUPT_MODE_VIRQ,1,(u32)&set_sample);
+
+	/* pwm init */
+	pwm_set_rate_and_prescaler(0xff,0);
+	pwm_config(PWM_CHAN2,PWM_SINGLE_EDGE,0,0);
+	pwm_match_ctrl_config(PWM_CHAN2,0);
+	interrupt_pwm_ir_set(PWM_CHAN2);
+	pwm_enable;
+	
 
 	/*
 	 * start it ...
diff --git a/betty/betty.h b/betty/betty.h
index 07d063a..e292a80 100644
--- a/betty/betty.h
+++ b/betty/betty.h
@@ -28,11 +28,15 @@
 #include "flash.h"
 #include "pffs.h"
 #include "interrupts.h"
+#include "pwm.h"
 
 // font/logo
 #include "default_font.h"
 #include "default_logo.h"
 
+// sinus
+#include "sinus.h"
+
 /*
  * defines
  */
diff --git a/betty/interrupts.c b/betty/interrupts.c
index df99354..ed33c15 100644
--- a/betty/interrupts.c
+++ b/betty/interrupts.c
@@ -180,14 +180,14 @@ void interrupt_tc_match_config(u8 tcnum,u8 mnum,u32 val,u8 mode) {
 
 	if(tcnum==0) {
 		T0MCR=(T0MCR&0x0fff)|(mode<<(3*mnum));
-		mrddr=&T0MR0
+		mraddr=(u32 *)&T0MR0;
 	}
 	else {
 		T1MCR=(T1MCR&0x0fff)|(mode<<(3*mnum));
-		mrddr=&T1MR0
+		mraddr=(u32 *)&T1MR0;
 	}
 
-	mraddr[mnum]=val;
+	*((volatile u32 *)(mraddr+mnum))=val;
 }
 
 void interrupt_tc_capt_config(u8 tcnum,u8 cnum,u8 mode) {
@@ -220,29 +220,9 @@ void interrupt_tc_ir_set(u8 tcnum,u8 tcmc) {
 }
 
 // pwm interrupts
-void interrupt_pwm_set_rate(u32 rate) {
-
-	PWMMR0=rate;
-}
-
-void interrupt_pwm_match_config(u8 mnum,u8 op,u8 mode,u32 val1,u32 val2) {
-
-	u32 *addr=&PWMR0;
-
-	*((volatile u32 *)(addr+mnum))=mval;
-	PWMMCR=(PWMMCR&0x1fffff)|(mode<<(op*3));
-}
-
-void interrupt_pwm_enable(u8 mode,u32 ps_val) {
-
-	PWMPR=ps_val;
-	PWMTCR=0x0b;
-}
-
 void interrupt_pwm_ir_set(u8 pwm_channel) {
 
 	PWMIR=(pwm_channel&0x0f)|((pwm_channel&0x70)<<4);
-	PWMTCR=0x09;
 }
 
 /*
diff --git a/betty/interrupts.h b/betty/interrupts.h
index 21d7413..0d8266c 100644
--- a/betty/interrupts.h
+++ b/betty/interrupts.h
@@ -77,6 +77,9 @@
 #define INTERRUPT_C2			0x40
 #define INTERRUPT_C3			0x80
 
+#define INTERRUPT_TC0			0
+#define INTERRUPT_TC1			1
+
 #define INTERRUPT_SET			0x00
 #define INTERRUPT_USED			0x01
 #define INTERRUPT_PRIORITY_USED		0x02
@@ -111,6 +114,8 @@ void interrupt_tc_match_config(u8 tcnum,u8 mnum,u32 val,u8 mode);
 void interrupt_tc_capt_config(u8 tcnum,u8 cnum,u8 mode);
 void interrupt_tc_ir_set(u8 tcnum,u8 tcmc);
 
+void interrupt_pwm_ir_set(u8 pwm_channel);
+
 void interrupt_handler_reset(void);
 void interrupt_handler_undef_instruction(void);
 void interrupt_handler_soft_ir(void);
diff --git a/betty/system.c b/betty/system.c
index ef18b57..7554373 100644
--- a/betty/system.c
+++ b/betty/system.c
@@ -64,10 +64,11 @@ void pin_init(void) {
 	 * pinsel 0
 	 *
 	 * uart0: tx, rx
+	 * p0.7: pwm2
 	 *
 	 */
 
-	PINSEL0=0x00000005;
+	PINSEL0=0x00008005;
 
 	/*
 	 * pinsel 1
-- 
2.20.1