From: Nathael Pajani <nathael.pajani@ed3l.fr>
Date: Fri, 13 Dec 2013 10:18:06 +0000 (+0100)
Subject: Adding timer mode to timer support Some modification of the timer functions.
X-Git-Url: http://git.techno-innov.fr/?a=commitdiff_plain;h=d4e3e539f5f3cac839165f431ee947d08364ac46;p=soft%2Flpc122x%2Fcore

Adding timer mode to timer support Some modification of the timer functions.
---

diff --git a/drivers/timers.c b/drivers/timers.c
index 1e03277..21e2ab6 100644
--- a/drivers/timers.c
+++ b/drivers/timers.c
@@ -72,14 +72,22 @@ void timer_start(uint32_t timer_num)
 	/* Remove reset flag and set timer enable flag */
 	timer_devices[timer_num].regs->timer_ctrl = LPC_TIMER_COUNTER_ENABLE;
 }
-/* Stops the timer counter
- * FIXME: Does not issue reset ... need to check whether it is reseted or not.
- */
+void timer_continue(uint32_t timer_num) __attribute__ ((alias ("timer_start")));
+/* Pause the timer counter, does not reset */
+void timer_pause(uint32_t timer_num)
+{
+	if (timer_num >= NUM_TIMERS)
+		return;
+	/* Remove timer enable flag */
+	timer_devices[timer_num].regs->timer_ctrl = 0;
+}
+/* Stops and resets the timer counter */
 void timer_stop(uint32_t timer_num)
 {
 	if (timer_num >= NUM_TIMERS)
 		return;
 	/* Remove timer enable flag */
+	timer_devices[timer_num].regs->timer_ctrl |= LPC_TIMER_COUNTER_RESET;
 	timer_devices[timer_num].regs->timer_ctrl = 0;
 }
 /* Resets the timer and lets it count again imediately */
@@ -99,6 +107,12 @@ uint32_t timer_get_capture_val(uint32_t timer_num, uint32_t channel)
 	/* FIXME */
 	return 0;
 }
+uint32_t timer_get_counter_val(uint32_t timer_num)
+{
+	if (timer_num >= NUM_TIMERS)
+		return 0;
+	return timer_devices[timer_num].regs->timer_counter;
+}
 
 /* Change the match value of a single timer channel */
 void timer_set_match(uint32_t timer_num, uint32_t channel, uint32_t val)
@@ -133,12 +147,18 @@ int timer_setup(uint32_t timer_num, struct timer_config* conf)
 	}
 
 	switch (conf->mode) {
+		case LPC_TIMER_MODE_TIMER:
+			timer->regs->capture_ctrl = 0; /* Timer mode ! */
+			timer->regs->count_ctrl = LPC_COUNTER_IS_TIMER;
+			break;
 		case LPC_TIMER_MODE_COUNTER:
 			if ((conf->config[0] & 0x03) == 0x00) {
 				return -EINVAL;
 			}
 			/* Must set capture chanel N config to 0b000 in capture control register,
-			   (see remarks in user manual UM10441 page 268 section 14.7.11) */
+			 * (see remarks in user manual UM10441 page 268 section 14.7.11)
+			 * Use the LPC_COUNTER_INC_INPUT(x) set by the user to do so automatically
+			 */
 			timer->regs->capture_ctrl &= ~LPC_TIMER_CAPTURE_ERASE(((conf->config[0] >> LPC_COUNTER_INC_INPUT_SHIFT) & 0x03) * 3);
 			/* Configure the counter */
 			timer->regs->count_ctrl |= (conf->config[0] & 0x0F);
diff --git a/include/drivers/timers.h b/include/drivers/timers.h
index c2efe94..f562fb8 100644
--- a/include/drivers/timers.h
+++ b/include/drivers/timers.h
@@ -40,11 +40,14 @@
 
 
 /* Timer modes for the "mode" timer config structure field */
-#define LPC_TIMER_MODE_COUNTER  1
-#define LPC_TIMER_MODE_CAPTURE  2
-#define LPC_TIMER_MODE_MATCH    3
-#define LPC_TIMER_MODE_PWM      4  /* Pulse Width Modulation */
-#define LPC_TIMER_MODE_PWD      5  /* Pulse Width Demodulation */
+enum lpc_timer_mode {
+	LPC_TIMER_MODE_TIMER = 0,
+	LPC_TIMER_MODE_COUNTER,
+	LPC_TIMER_MODE_CAPTURE,
+	LPC_TIMER_MODE_MATCH,
+	LPC_TIMER_MODE_PWM,  /* Pulse Width Modulation */
+	LPC_TIMER_MODE_PWD,  /* Pulse Width Demodulation */
+};
 
 /* Structure used to pass parameters to configure a timer */
 /* Notes:
@@ -68,10 +71,12 @@ struct timer_config
  * Timer must be turned on and configured (no checks done here).
  */
 void timer_start(uint32_t timer_num);
+void timer_continue(uint32_t timer_num);
 
-/* Stops the timer counter
- * FIXME: Does not issue reset ... need to check whether it is reseted or not.
- */
+/* Pause the timer counter, does not reset */
+void timer_pause(uint32_t timer_num);
+
+/* Stop and reset the timer counter */
 void timer_stop(uint32_t timer_num);
 
 /* Resets the timer and lets it count again imediately */
@@ -79,6 +84,7 @@ void timer_restart(uint32_t timer_num);
 
 uint32_t timer_get_capture_val(uint32_t timer_num, uint32_t channel);
 
+uint32_t timer_get_counter_val(uint32_t timer_num);
 
 /* Change the match value of a single timer channel */
 void timer_set_match(uint32_t timer_num, uint32_t channel, uint32_t val);