From 41f6b6d6f31f5617810c752fd15015549d78cdc3 Mon Sep 17 00:00:00 2001
From: Daniel Friesel <derf@finalrewind.org>
Date: Thu, 18 Oct 2018 07:34:17 +0200
Subject: MSP430: Show calculated real timer frequency on 'info"

---
 src/arch/msp430fr5969lp/Makefile.inc |  2 +-
 src/arch/msp430fr5969lp/model.py     | 48 ++++++++++++++++++++++++++++++++++++
 2 files changed, 49 insertions(+), 1 deletion(-)
 create mode 100755 src/arch/msp430fr5969lp/model.py

(limited to 'src')

diff --git a/src/arch/msp430fr5969lp/Makefile.inc b/src/arch/msp430fr5969lp/Makefile.inc
index 2eb9dc9..d639a9d 100644
--- a/src/arch/msp430fr5969lp/Makefile.inc
+++ b/src/arch/msp430fr5969lp/Makefile.inc
@@ -86,7 +86,7 @@ arch_help:
 
 arch_info:
 	@echo "CPU   Freq: ${cpu_freq} Hz"
-	@echo "Timer Freq: ${timer_freq} Hz"
+	@echo "Timer Freq: ${timer_freq} Hz -> $(shell src/arch/msp430fr5969lp/model.py f_timer "${cpu_freq}" "${timer_freq}")"
 	@echo "I2C   Freq: ${i2c_freq} Hz"
 
 .PHONY: arch_clean arch_help arch_info monitor program
diff --git a/src/arch/msp430fr5969lp/model.py b/src/arch/msp430fr5969lp/model.py
new file mode 100755
index 0000000..4747b68
--- /dev/null
+++ b/src/arch/msp430fr5969lp/model.py
@@ -0,0 +1,48 @@
+#!/usr/bin/env python3
+
+import numpy as np
+import sys
+
+# include/arch/msp430fr5969lp/driver/timer.h
+def get_timer_frequency(f_cpu, f_timer):
+    if f_cpu == 16000000:
+        ta0_main_div = 8
+    elif f_cpu == 8000000:
+        ta0_main_div = 4
+    elif f_cpu == 4000000:
+        ta0_main_div = 2
+    elif f_cpu == 1000000:
+        ta0_main_div = 1
+    else:
+        raise ValueError("Invalid f_cpu")
+
+    if f_cpu == 1000000:
+        if f_timer >= 1000:
+            divisor = 1
+            counter = 1000 / (f_timer / 1000)
+        elif f_timer >= 20:
+            divisor = 1
+            counter = 1000000 / f_timer
+        else:
+            divisor = 8 * 2
+            counter = 62500 / f_timer
+    else:
+        if f_timer >= 1000:
+            divisor = ta0_main_div * 1
+            counter = 2000 / (f_timer / 1000)
+        else:
+            divisor = ta0_main_div * 1
+            counter = 2000000 / f_timer
+
+    return f_cpu / divisor / int(counter)
+
+module = sys.argv[1]
+
+if module == 'f_timer' and len(sys.argv) == 4:
+    try:
+        f_cpu = int(sys.argv[2])
+        f_timer = int(sys.argv[3])
+    except:
+        sys.exit(0)
+    if f_cpu != 0 and f_timer != 0:
+        print('{:.2f}'.format(get_timer_frequency(f_cpu, f_timer)))
-- 
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