From 206bea0a1de148f70ade6b813f4d41eca8924aa2 Mon Sep 17 00:00:00 2001
From: chrysn <chrysn@fsfe.org>
Date: Tue, 25 Jan 2022 13:46:08 +0100
Subject: [PATCH] phydat: Add Tesla unit

While this is equivalent to the existing Gs (1 T = 10^-4 Gs), this is
the SI (and thus preferred) unit.
---
 sys/include/phydat.h                        | 1 +
 sys/phydat/phydat_str.c                     | 1 +
 tests/phydat_dump/main.c                    | 1 +
 tests/phydat_dump/tests/01-run.py           | 3 +++
 tests/unittests/tests-phydat/tests-phydat.c | 1 +
 5 files changed, 7 insertions(+)

diff --git a/sys/include/phydat.h b/sys/include/phydat.h
index 4e7a99d72c..b83f11c2cc 100644
--- a/sys/include/phydat.h
+++ b/sys/include/phydat.h
@@ -97,6 +97,7 @@ enum {
     UNIT_V,         /**< Volts */
     UNIT_W,         /**< Watt */
     UNIT_GS,        /**< gauss */
+    UNIT_T,         /**< Tesla */
     UNIT_DBM,       /**< decibel-milliwatts */
     UNIT_COULOMB,   /**< coulomb */
     UNIT_F,         /**< Farad */
diff --git a/sys/phydat/phydat_str.c b/sys/phydat/phydat_str.c
index bbdea52bad..bad60643f3 100644
--- a/sys/phydat/phydat_str.c
+++ b/sys/phydat/phydat_str.c
@@ -114,6 +114,7 @@ const char *phydat_unit_to_str(uint8_t unit)
         case UNIT_W:        return "W";
         case UNIT_DBM:      return "dBm";
         case UNIT_GS:       return "Gs";
+        case UNIT_T:        return "T";
         case UNIT_BAR:      return "Bar";
         case UNIT_PA:       return "Pa";
         case UNIT_PERMILL:  return "permille";
diff --git a/tests/phydat_dump/main.c b/tests/phydat_dump/main.c
index b0c73f04a9..8ce6d1ff22 100644
--- a/tests/phydat_dump/main.c
+++ b/tests/phydat_dump/main.c
@@ -45,6 +45,7 @@ _phydat_test_t _test_vector[] =
     { .dim = 1, .dat = { .val = { 12345 }, .unit = UNIT_V, .scale = 6 } },
     { .dim = 1, .dat = { .val = { 12345 }, .unit = UNIT_W, .scale = 7 } },
     { .dim = 1, .dat = { .val = { 12345 }, .unit = UNIT_GS, .scale = -1 } },
+    { .dim = 3, .dat = { .val = { 123, 456, 789 }, .unit = UNIT_T, .scale = -9 } },
     { .dim = 1, .dat = { .val = { 12345 }, .unit = UNIT_DBM, .scale = -3 } },
     { .dim = 1, .dat = { .val = { 12345 }, .unit = UNIT_COULOMB, .scale = 0 } },
     { .dim = 1, .dat = { .val = { 12345 }, .unit = UNIT_F, .scale = -6 } },
diff --git a/tests/phydat_dump/tests/01-run.py b/tests/phydat_dump/tests/01-run.py
index 39a781702f..670c589e06 100755
--- a/tests/phydat_dump/tests/01-run.py
+++ b/tests/phydat_dump/tests/01-run.py
@@ -44,6 +44,9 @@ def testfunc(child):
     child.expect(r'Data:\t          12345 MV\r\n')
     child.expect(r'Data:\t        12345e7 W\r\n')
     child.expect(r'Data:\t         1234.5 Gs\r\n')
+    child.expect(r'Data:\t\[0\]         123 nT\r\n')
+    child.expect(r'\t\[1\]         456 nT\r\n')
+    child.expect(r'\t\[2\]         789 nT\r\n')
     child.expect(r'Data:\t         12.345 dBm\r\n')
     child.expect(r'Data:\t          12345 C\r\n')
     child.expect(r'Data:\t          12345 uF\r\n')
diff --git a/tests/unittests/tests-phydat/tests-phydat.c b/tests/unittests/tests-phydat/tests-phydat.c
index de5cce7408..504f029db5 100644
--- a/tests/unittests/tests-phydat/tests-phydat.c
+++ b/tests/unittests/tests-phydat/tests-phydat.c
@@ -212,6 +212,7 @@ static void test_unitstr__success(void)
     TEST_ASSERT_EQUAL_STRING("W", phydat_unit_to_str_verbose(UNIT_W));
     TEST_ASSERT_EQUAL_STRING("dBm", phydat_unit_to_str_verbose(UNIT_DBM));
     TEST_ASSERT_EQUAL_STRING("Gs", phydat_unit_to_str_verbose(UNIT_GS));
+    TEST_ASSERT_EQUAL_STRING("T", phydat_unit_to_str_verbose(UNIT_T));
     TEST_ASSERT_EQUAL_STRING("Bar", phydat_unit_to_str_verbose(UNIT_BAR));
     TEST_ASSERT_EQUAL_STRING("Pa", phydat_unit_to_str_verbose(UNIT_PA));
     TEST_ASSERT_EQUAL_STRING("permille", phydat_unit_to_str_verbose(UNIT_PERMILL));